Car Affordability Calculator Income

Car Affordability Calculator by Income – How Much Car Can You Afford? :root { –primary-color: #004a99; –secondary-color: #007bff; –success-color: #28a745; –warning-color: #ffc107; –danger-color: #dc3545; –light-gray: #f8f9fa; –dark-gray: #343a40; –white: #ffffff; –black: #000000; –border-radius: 8px; –box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–light-gray); color: var(–dark-gray); line-height: 1.6; margin: 0; padding: 20px; display: flex; flex-direction: column; align-items: center; } .container { max-width: 1000px; width: 100%; background-color: var(–white); padding: 30px; border-radius: var(–border-radius); box-shadow: var(–box-shadow); margin-bottom: 30px; } h1, h2, h3 { color: var(–primary-color); text-align: center; margin-bottom: 20px; } h1 { font-size: 2.5em; margin-bottom: 10px; } h2 { font-size: 1.8em; } h3 { font-size: 1.4em; } p { margin-bottom: 15px; } .loan-calc-container { background-color: var(–white); padding: 30px; border-radius: var(–border-radius); box-shadow: var(–box-shadow); margin-bottom: 30px; display: flex; flex-direction: column; gap: 20px; } .input-group { display: flex; flex-direction: column; gap: 8px; } .input-group label { font-weight: bold; color: var(–primary-color); } .input-group input[type="number"], .input-group input[type="text"], .input-group select { padding: 12px 15px; border: 1px solid #ccc; border-radius: var(–border-radius); font-size: 1em; transition: border-color 0.3s ease; } .input-group input[type="number"]:focus, .input-group input[type="text"]:focus, .input-group select:focus { outline: none; border-color: var(–primary-color); box-shadow: 0 0 0 3px rgba(0, 74, 153, 0.2); } .input-group .helper-text { font-size: 0.85em; color: #6c757d; } .input-group .error-message { color: var(–danger-color); font-size: 0.85em; margin-top: 5px; min-height: 1.2em; /* Reserve space to prevent layout shifts */ } .button-group { display: flex; gap: 15px; margin-top: 20px; justify-content: center; flex-wrap: wrap; } .btn { padding: 12px 25px; border: none; border-radius: var(–border-radius); cursor: pointer; font-size: 1em; font-weight: bold; transition: background-color 0.3s ease, transform 0.2s ease; min-width: 150px; } .btn-primary { background-color: var(–primary-color); color: var(–white); } .btn-primary:hover { background-color: #003a7f; transform: translateY(-2px); } .btn-secondary { background-color: var(–secondary-color); color: var(–white); } .btn-secondary:hover { background-color: #0056b3; transform: translateY(-2px); } .btn-reset { background-color: var(–warning-color); color: var(–black); } .btn-reset:hover { background-color: #e0a800; transform: translateY(-2px); } #results-container { margin-top: 30px; padding: 30px; background-color: var(–primary-color); color: var(–white); border-radius: var(–border-radius); box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.2); text-align: center; } #results-container h2 { color: var(–white); margin-bottom: 15px; } .main-result { font-size: 2.5em; font-weight: bold; margin: 15px 0; padding: 15px; background-color: rgba(255, 255, 255, 0.2); border-radius: var(–border-radius); display: inline-block; /* Allow padding and background to wrap content */ } .intermediate-results div, .formula-explanation { margin-bottom: 15px; font-size: 1.1em; } .intermediate-results span { font-weight: bold; color: rgba(255, 255, 255, 0.9); } .formula-explanation { font-style: italic; color: rgba(255, 255, 255, 0.8); border-top: 1px solid rgba(255, 255, 255, 0.3); padding-top: 15px; margin-top: 20px; } table { width: 100%; border-collapse: collapse; margin-top: 25px; background-color: var(–white); box-shadow: var(–box-shadow); border-radius: var(–border-radius); overflow: hidden; /* Ensures rounded corners are applied to cells if any */ } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #dee2e6; } thead th { background-color: var(–primary-color); color: var(–white); font-weight: bold; } tbody tr:nth-child(even) { background-color: #f2f2f2; } tbody tr:hover { background-color: #e9ecef; } caption { font-size: 1.1em; font-weight: bold; color: var(–primary-color); margin-bottom: 15px; text-align: left; } #chartContainer { width: 100%; background-color: var(–white); padding: 30px; border-radius: var(–border-radius); box-shadow: var(–box-shadow); margin-top: 30px; display: flex; flex-direction: column; align-items: center; } #chartContainer canvas { max-width: 100%; height: auto; } #chartContainer figcaption { font-size: 0.9em; color: #6c757d; margin-top: 10px; text-align: center; } .article-section { margin-top: 40px; padding-top: 40px; border-top: 1px solid #eee; text-align: left; /* Reset text alignment for article */ max-width: 100%; /* Ensure article content doesn't overflow container */ } .article-section h2 { text-align: left; margin-bottom: 20px; color: var(–primary-color); } .article-section h3 { text-align: left; margin-top: 25px; margin-bottom: 10px; color: var(–primary-color); } .article-section ul, .article-section ol { padding-left: 25px; margin-bottom: 15px; } .article-section li { margin-bottom: 8px; } .article-section a { color: var(–secondary-color); text-decoration: none; } .article-section a:hover { text-decoration: underline; } .faq-item { margin-bottom: 15px; } .faq-question { font-weight: bold; color: var(–primary-color); cursor: pointer; position: relative; padding-left: 25px; } .faq-question::before { content: "+"; position: absolute; left: 0; font-weight: bold; color: var(–primary-color); font-size: 1.2em; transition: transform 0.3s ease; } .faq-answer { display: none; margin-top: 10px; padding-left: 25px; font-size: 0.95em; color: #555; } .faq-item.active .faq-question::before { transform: rotate(45deg); } .faq-item.active .faq-answer { display: block; } .related-links-list { list-style: none; padding: 0; } .related-links-list li { margin-bottom: 15px; padding-bottom: 15px; border-bottom: 1px solid #eee; } .related-links-list li:last-child { border-bottom: none; padding-bottom: 0; } .related-links-list a { font-weight: bold; display: block; margin-bottom: 5px; } .related-links-list span { font-size: 0.9em; color: #6c757d; } @media (min-width: 768px) { .container { padding: 40px; } h1 { font-size: 3em; } h2 { font-size: 2em; } } .tooltip { position: relative; display: inline-block; border-bottom: 1px dotted var(–primary-color); cursor: help; } .tooltip .tooltiptext { visibility: hidden; width: 250px; background-color: var(–dark-gray); color: var(–white); text-align: center; border-radius: var(–border-radius); padding: 10px; position: absolute; z-index: 1; bottom: 125%; left: 50%; margin-left: -125px; opacity: 0; transition: opacity 0.3s; font-size: 0.85em; box-shadow: 0 2px 5px rgba(0,0,0,0.3); } .tooltip .tooltiptext::after { content: ""; position: absolute; top: 100%; left: 50%; margin-left: -5px; border-width: 5px; border-style: solid; border-color: var(–dark-gray) transparent transparent var(–dark-gray); } .tooltip:hover .tooltiptext { visibility: visible; opacity: 1; }

Car Affordability Calculator by Income

Understand how much car you can realistically afford based on your income and essential expenses. Make informed financial decisions with confidence.

Calculate Your Car Budget

Your total income before taxes and deductions.
Your fixed housing cost each month.
e.g., student loans, credit cards, personal loans.
The maximum you're willing to spend on a car payment.
Get quotes for your desired vehicle.
Based on mileage and fuel prices.
Budget for oil changes, tires, and unexpected repairs.

Your Car Affordability Summary

Maximum Affordable Car Price:
Recommended Max Monthly Payment:
Monthly Disposable Income Remaining:
Car Affordability Score:
Formula: The calculator estimates your maximum car price by analyzing your disposable income after essential expenses, ensuring your total car ownership costs (payment, insurance, fuel, maintenance) do not exceed a recommended percentage of your income.

Monthly Car Expense Breakdown

Visualizing your estimated monthly car expenses.
Key Assumptions and Calculations
Metric Value Notes
Annual Gross Income Total income before taxes.
Monthly Housing Costs Rent or mortgage payment.
Other Monthly Debts Existing loan and credit card payments.
Disposable Income (Pre-Car) Income after housing and other debts.
Recommended Max Monthly Car Payment Target payment for the car loan.
Estimated Monthly Insurance Cost of car insurance.
Estimated Monthly Fuel Budget for gasoline/charging.
Estimated Monthly Maintenance Savings for upkeep and repairs.
Total Estimated Monthly Car Costs Sum of payment, insurance, fuel, maintenance.
Car Affordability Score A measure of how affordable the car is for your budget.

{primary_keyword}

A car affordability calculator incomeThis tool helps you determine the maximum car price you can afford by factoring in your income and essential monthly expenses. It provides a realistic budget for your vehicle purchase and ongoing ownership costs. is a financial tool designed to help individuals assess how much they can realistically spend on a vehicle purchase based on their income. Unlike calculators focusing solely on loan amounts, this type of calculator takes a holistic view, considering your gross income, essential living expenses (like rent/mortgage and other debts), and the total cost of car ownership (including loan payments, insurance, fuel, and maintenance). The goal is to ensure that buying a car doesn't strain your finances, leaving you with sufficient disposable income for other needs and savings. Understanding your car affordability by incomeThis refers to the process of determining the maximum price of a vehicle that aligns with your current income level and financial obligations. It ensures that car ownership remains sustainable without compromising other financial goals. is crucial for making a sound financial decision.

Who Should Use a Car Affordability Calculator by Income?

  • First-time car buyers: To set a realistic budget and avoid overspending.
  • Individuals looking to upgrade: To ensure a new vehicle fits comfortably within their financial picture.
  • Those facing budget constraints: To understand what they can afford while managing other financial priorities.
  • Anyone planning a car purchase: To gain a clear, data-driven understanding of their spending power.

Common Misconceptions about Car Affordability

  • "If I can get approved for a loan, I can afford it." Loan approval doesn't always mean affordability. Lenders assess risk, not necessarily your long-term financial health.
  • "Only the monthly payment matters." The total cost of ownership, including insurance, fuel, and maintenance, significantly impacts affordability.
  • "A larger down payment solves everything." While helpful, a large down payment doesn't negate the impact of high monthly payments or other ownership costs on your budget.
  • Focusing solely on purchase price: Affordability is about sustainable monthly costs, not just the sticker price.

{primary_keyword} Formula and Mathematical Explanation

The core principle behind a car affordability calculator incomeThis tool assesses vehicle purchasing power based on income, crucial for budgeting and preventing financial strain. is to determine the maximum amount you can allocate towards car ownership without jeopardizing your financial stability. This involves calculating your disposable income and then allocating a portion of it to all car-related expenses.

Step-by-Step Calculation

  1. Calculate Monthly Gross Income: Divide your Annual Gross Income by 12.
  2. Calculate Total Essential Monthly Expenses: Sum your Monthly Rent/Mortgage, Other Monthly Debt Payments, Estimated Monthly Insurance, Estimated Monthly Fuel, and Estimated Monthly Maintenance.
  3. Calculate Monthly Disposable Income (Pre-Car): Subtract Total Essential Monthly Expenses from Monthly Gross Income.
  4. Determine Recommended Maximum Monthly Car Payment: This is often a percentage of your Monthly Gross Income (e.g., 10-15%) or a percentage of your Disposable Income (Pre-Car). The calculator uses a benchmark to ensure sufficient funds remain for other expenses and savings. For this calculator, we establish a target monthly car payment input and then calculate the maximum affordable car price based on that target, alongside other estimated costs.
  5. Calculate Maximum Affordable Car Price: This is a derived figure. If a target monthly payment is set, the calculator works backward. However, a more robust approach calculates based on available disposable income. A common guideline is that total car expenses (payment + insurance + fuel + maintenance) should not exceed 15-20% of your gross monthly income. If we assume a monthly car payment of $X, and add insurance, fuel, and maintenance, this sum should fit within that discretionary income band. The maximum affordable car price is then estimated based on common loan terms (e.g., 60 months) and an assumed interest rate, working backward from the maximum affordable total monthly car cost.
  6. Calculate Car Affordability Score: This score can be a simple percentage of your gross monthly income that your total car expenses represent, or a more complex ratio factoring in disposable income. A score below 15% of gross monthly income is generally considered good.

Variable Explanations

  • Annual Gross Income: Your total earnings before taxes and deductions.
  • Monthly Rent/Mortgage: Your fixed housing cost.
  • Other Monthly Debt Payments: Payments for loans, credit cards, etc.
  • Target Monthly Car Payment: The maximum you are comfortable paying for the car loan itself.
  • Estimated Monthly Insurance: Insurance premiums for the vehicle.
  • Estimated Monthly Fuel: Cost of gas or electricity for the car.
  • Estimated Monthly Maintenance: Budget for routine servicing and unexpected repairs.
  • Maximum Affordable Car Price: The estimated highest price of a car you can afford.
  • Recommended Max Monthly Car Payment: The calculated maximum sustainable payment for the car loan.
  • Monthly Disposable Income Remaining: Funds left after all essential expenses and car ownership costs.
  • Car Affordability Score: A metric indicating how well the car fits your budget.

Variables Table

Car Affordability Variables
Variable Meaning Unit Typical Range / Rule of Thumb
Annual Gross Income Total yearly income before taxes. USD $20,000 – $200,000+
Monthly Rent/Mortgage Fixed cost for housing. USD $500 – $3,000+
Other Monthly Debt Payments Sum of payments for loans, credit cards. USD $0 – $1,000+
Target Monthly Car Payment User-defined maximum for the car loan payment. USD $100 – $1,000+
Estimated Monthly Insurance Vehicle insurance premium. USD $50 – $300+
Estimated Monthly Fuel Cost of fuel/charging. USD $50 – $250+
Estimated Monthly Maintenance Budget for upkeep and repairs. USD $30 – $150+
Maximum Affordable Car Price Calculated upper limit for vehicle purchase price. USD Varies greatly based on income and expenses.
Recommended Max Monthly Car Payment Calculated sustainable loan payment. USD Generally 10-15% of gross monthly income.
Monthly Disposable Income Remaining Funds left after all specified expenses. USD Should be sufficient for savings, emergencies, and discretionary spending.
Car Affordability Score Ratio of total car costs to gross monthly income. % Ideally below 15-20%.

Practical Examples (Real-World Use Cases)

Let's explore a couple of scenarios using the car affordability calculator incomeThis tool provides financial guidance for car purchases based on income, ensuring responsible budgeting..

Example 1: Young Professional Starting Out

Scenario: Sarah earns $60,000 annually. Her monthly rent is $1,200, and she has $200 in other monthly debt payments. She wants a reliable car but is cautious about overspending.

Inputs:

  • Annual Gross Income: $60,000
  • Monthly Rent/Mortgage: $1,200
  • Other Monthly Debt Payments: $200
  • Target Monthly Car Payment: $300
  • Estimated Monthly Insurance: $120
  • Estimated Monthly Fuel: $80
  • Estimated Monthly Maintenance: $40

Outputs:

  • Maximum Affordable Car Price: ~$16,000 (based on a 60-month loan at ~5% APR)
  • Recommended Max Monthly Car Payment: ~$300 (as targeted)
  • Monthly Disposable Income Remaining: ~$1,660
  • Car Affordability Score: ~13.3% (Total Car Costs $540 / $3750 Gross Monthly Income)

Interpretation:

Sarah's inputs suggest she can afford a car with a monthly payment around $300. The calculator estimates this translates to a purchase price of roughly $16,000. Her total car expenses represent about 13.3% of her gross monthly income, which is well within the recommended range. She has a healthy amount of disposable income ($1,660) remaining after all specified costs, indicating good affordability.

Example 2: Family with Existing Financial Commitments

Scenario: Mark and Lisa have a combined annual income of $110,000. Their mortgage is $1,800 per month, and they have $600 in other debt payments. They need a larger vehicle but are concerned about stretching their budget.

Inputs:

  • Annual Gross Income: $110,000
  • Monthly Rent/Mortgage: $1,800
  • Other Monthly Debt Payments: $600
  • Target Monthly Car Payment: $500
  • Estimated Monthly Insurance: $200
  • Estimated Monthly Fuel: $150
  • Estimated Monthly Maintenance: $75

Outputs:

  • Maximum Affordable Car Price: ~$26,500 (based on a 60-month loan at ~5% APR)
  • Recommended Max Monthly Car Payment: ~$500 (as targeted)
  • Monthly Disposable Income Remaining: ~$2,975
  • Car Affordability Score: ~14.7% (Total Car Costs $925 / $9167 Gross Monthly Income)

Interpretation:

Mark and Lisa's financial situation allows for a higher car payment. Their targeted $500 monthly payment supports a vehicle price around $26,500. Their total car costs consume approximately 14.7% of their gross monthly income, which is acceptable. The remaining disposable income of nearly $3,000 provides a comfortable buffer for other expenses, savings, and unexpected costs.

These examples highlight how the car affordability calculator incomeThis tool analyzes income against expenses to set a realistic car budget. provides tailored insights based on individual financial profiles.

How to Use This Car Affordability Calculator by Income

Using our car affordability calculator incomeA tool to determine car budget based on your income and expenses. is straightforward. Follow these steps to get a clear picture of your car budget:

  1. Enter Your Income: Input your Annual Gross Income. This is your total income before any taxes or deductions.
  2. Input Essential Expenses:
    • Monthly Rent/Mortgage: Enter your fixed housing payment.
    • Other Monthly Debt Payments: Sum up all your other monthly loan and credit card payments (student loans, personal loans, etc.).
  3. Estimate Car Ownership Costs:
    • Target Monthly Car Payment: Decide on the maximum monthly payment you are comfortable with for the car loan itself. This is a key input that drives affordability.
    • Estimated Monthly Insurance: Research average insurance costs for the type of car you're considering.
    • Estimated Monthly Fuel: Estimate your average monthly spending on gasoline or electricity.
    • Estimated Monthly Maintenance: Budget a small amount monthly for routine maintenance and potential repairs.
  4. Calculate: Click the "Calculate Affordability" button.

How to Read the Results

  • Maximum Affordable Car Price: This is an estimated upper limit for the total price of the car you can purchase, considering your inputs and typical loan terms (e.g., 60 months at an average interest rate).
  • Recommended Max Monthly Car Payment: This reiterates your target payment and shows if it's feasible within a conservative budget.
  • Monthly Disposable Income Remaining: This figure shows how much money you'll have left each month for savings, discretionary spending, emergencies, or other financial goals after covering all listed expenses. A higher number indicates better financial flexibility.
  • Car Affordability Score: This percentage represents your total estimated monthly car expenses (payment + insurance + fuel + maintenance) relative to your gross monthly income. A lower percentage (ideally under 15-20%) indicates better affordability and less financial strain.
  • Chart and Table: Review the visual breakdown of your estimated monthly car costs and the detailed table of assumptions to understand the components of the calculation.

Decision-Making Guidance

Use the results as a guide, not a strict rule. If your disposable income is low, or your affordability score is high, consider a less expensive vehicle, a longer loan term (with caution about total interest paid), or increasing your income/reducing other expenses. If you have ample disposable income and a low affordability score, you might have room to adjust your targets upwards, but always prioritize financial security. This car affordability calculator incomeA tool for assessing car budget relative to personal income. helps you find a balance.

Key Factors That Affect Car Affordability Results

Several elements significantly influence the outcome of a car affordability calculator incomeThis calculator helps estimate car budget based on income.. Understanding these can help you refine your inputs and expectations:

  1. Gross vs. Net Income: The calculator uses gross income for broad estimations. However, net (take-home) income is what you actually have available. High taxes or extensive deductions can reduce your actual spending power.
  2. Interest Rates (APR): While not a direct input, the "Maximum Affordable Car Price" is derived assuming an average interest rate. Fluctuations in actual loan APRs will change the total price you can afford for a given monthly payment. Higher rates mean lower affordable prices.
  3. Loan Term Length: Longer loan terms (e.g., 72 or 84 months) reduce monthly payments but significantly increase the total interest paid over the life of the loan and can lead to being "upside down" (owing more than the car is worth). Shorter terms (e.g., 36 or 48 months) mean higher payments but less total interest.
  4. Insurance Premiums: Insurance costs vary wildly based on the vehicle type, your driving record, location, age, and coverage levels. Underestimating insurance can significantly impact affordability.
  5. Fuel Efficiency and Type: The cost of fuel depends heavily on the car's MPG (or MPGe for electric vehicles) and current fuel prices. A gas-guzzler will dramatically increase monthly fuel expenses compared to a hybrid or EV.
  6. Maintenance and Repair Costs: Newer cars typically have lower immediate maintenance costs but may have higher repair bills if something goes wrong outside of warranty. Older cars might require more frequent routine maintenance. Luxury or performance vehicles often have higher parts and labor costs.
  7. Down Payment: While this calculator focuses on monthly affordability, a larger down payment reduces the loan principal, thus lowering the monthly payment or the total price you can afford.
  8. Other Lifestyle Expenses: The calculator accounts for rent/mortgage and debt. However, other significant expenses like childcare, healthcare premiums, utilities, and savings goals also compete for your disposable income and affect true affordability.

Frequently Asked Questions (FAQ)

What is considered a "good" car affordability score?
Generally, a car affordability score below 15-20% of your gross monthly income is considered good. This means your total car-related expenses (loan payment, insurance, fuel, maintenance) consume less than a fifth of your income, leaving ample room for other financial needs and goals.
Should I prioritize a lower monthly payment or a lower total cost?
Ideally, you want both. However, a lower monthly payment might be achieved with a longer loan term, increasing the total interest paid. Prioritize the lowest total cost over the car's lifetime while ensuring the monthly payment remains comfortably affordable within your budget.
How does a down payment affect my affordability?
A down payment reduces the amount you need to finance. This directly lowers your monthly car payment for a given car price and loan term, or it allows you to afford a more expensive car with the same monthly payment. It also reduces the total interest paid over time.
What if my estimated car costs exceed my disposable income?
If your desired car expenses surpass your disposable income, you need to adjust. Options include: reducing your target monthly car payment, finding a cheaper car, increasing your income, reducing other expenses, or reconsidering the purchase until your financial situation improves.
Does this calculator include taxes and registration fees?
This calculator focuses on the core affordability based on income and common recurring costs. Taxes, registration fees, and other one-time purchase costs are typically separate and should be budgeted for in addition to the figures generated here. They can be factored into your initial purchase budget or covered by savings.
How accurate are the "Maximum Affordable Car Price" estimates?
The "Maximum Affordable Car Price" is an estimate based on typical loan terms (e.g., 60 months) and an assumed average interest rate. Actual prices can vary significantly based on the specific loan APR offered to you, the loan term length you choose, and any dealer financing incentives. Always get pre-approved for a loan to know your exact borrowing power.
Should I use my gross or net income in the calculator?
This calculator uses gross annual income as a starting point, which is standard practice for broad affordability assessments. For a more precise understanding of your true spending power, consider how your net (take-home) income compares after taxes and deductions. If your net income is significantly lower than gross, you may need to be more conservative with your car budget.
What is the 'Car Affordability Score' measuring?
The Car Affordability Score is the ratio of your total estimated monthly car expenses (loan payment, insurance, fuel, maintenance) to your gross monthly income. It's a quick way to see how much of your income is dedicated to car ownership, with lower percentages indicating greater affordability and less financial risk.
Can I use this if I plan to buy a car with cash?
While this calculator is geared towards financed purchases, you can adapt it. Set the "Target Monthly Car Payment" to $0. The calculator will then show you your total monthly car expenses (insurance, fuel, maintenance) and the remaining disposable income. Your cash purchase budget should then be based on ensuring these ongoing costs are manageable and that the upfront cash payment doesn't deplete your emergency fund or essential savings.

© 2023 Your Financial Website. All rights reserved.

var ctx = null; var expenseChart = null; function initializeChart() { var canvas = document.getElementById('expenseChart'); if (!canvas) return; ctx = canvas.getContext('2d'); if (expenseChart) { expenseChart.destroy(); // Destroy previous chart if it exists } var data = { labels: ['Car Payment', 'Insurance', 'Fuel', 'Maintenance'], datasets: [{ label: 'Monthly Car Expenses', data: [0, 0, 0, 0], backgroundColor: [ 'rgba(0, 74, 153, 0.7)', // Primary Blue 'rgba(40, 167, 69, 0.7)', // Success Green 'rgba(255, 193, 7, 0.7)', // Warning Yellow 'rgba(220, 53, 69, 0.7)' // Danger Red ], borderColor: [ 'rgba(0, 74, 153, 1)', 'rgba(40, 167, 69, 1)', 'rgba(255, 193, 7, 1)', 'rgba(220, 53, 69, 1)' ], borderWidth: 1 }] }; var options = { responsive: true, maintainAspectRatio: true, plugins: { legend: { position: 'top', }, title: { display: false, text: 'Monthly Car Expense Breakdown' } } }; expenseChart = new Chart(ctx, { type: 'pie', data: data, options: options }); } // Helper function to validate input function validateInput(id, errorId, min, max, allowZero = false) { var input = document.getElementById(id); var errorElement = document.getElementById(errorId); var value = parseFloat(input.value); var isValid = true; errorElement.textContent = "; // Clear previous error if (isNaN(value)) { errorElement.textContent = 'Please enter a valid number.'; isValid = false; } else if (!allowZero && value <= 0) { errorElement.textContent = 'Value must be positive.'; isValid = false; } else if (allowZero && value < 0) { errorElement.textContent = 'Value cannot be negative.'; isValid = false; } else if (min !== null && value max) { errorElement.textContent = 'Value is too high.'; isValid = false; } return isValid ? value : null; } function calculateAffordability() { // Clear previous errors document.getElementById('annualIncomeError').textContent = "; document.getElementById('monthlyRentMortgageError').textContent = "; document.getElementById('otherDebtPaymentsError').textContent = "; document.getElementById('targetMonthlyCarPaymentError').textContent = "; document.getElementById('estimatedMonthlyInsuranceError').textContent = "; document.getElementById('estimatedMonthlyFuelError').textContent = "; document.getElementById('estimatedMonthlyMaintenanceError').textContent = "; // Input Validation var annualIncome = validateInput('annualIncome', 'annualIncomeError', 10000); // Min income of 10k var monthlyRentMortgage = validateInput('monthlyRentMortgage', 'monthlyRentMortgageError', 0, null, true); var otherDebtPayments = validateInput('otherDebtPayments', 'otherDebtPaymentsError', 0, null, true); var targetMonthlyCarPayment = validateInput('targetMonthlyCarPayment', 'targetMonthlyCarPaymentError', 0, null, true); var estimatedMonthlyInsurance = validateInput('estimatedMonthlyInsurance', 'estimatedMonthlyInsuranceError', 0, null, true); var estimatedMonthlyFuel = validateInput('estimatedMonthlyFuel', 'estimatedMonthlyFuelError', 0, null, true); var estimatedMonthlyMaintenance = validateInput('estimatedMonthlyMaintenance', 'estimatedMonthlyMaintenanceError', 0, null, true); if (annualIncome === null || monthlyRentMortgage === null || otherDebtPayments === null || targetMonthlyCarPayment === null || estimatedMonthlyInsurance === null || estimatedMonthlyFuel === null || estimatedMonthlyMaintenance === null) { return; // Stop if any input is invalid } // Calculations var monthlyGrossIncome = annualIncome / 12; var totalFixedExpenses = monthlyRentMortgage + otherDebtPayments; var disposableIncomePreCar = monthlyGrossIncome – totalFixedExpenses; var totalEstimatedCarCosts = targetMonthlyCarPayment + estimatedMonthlyInsurance + estimatedMonthlyFuel + estimatedMonthlyMaintenance; var monthlyDisposableIncomeRemaining = monthlyGrossIncome – totalFixedExpenses – totalEstimatedCarCosts; // Affordability Score based on Gross Monthly Income var affordabilityScorePercent = (totalEstimatedCarCosts / monthlyGrossIncome) * 100; // Estimate Max Affordable Car Price (simplified: based on target payment) // Assumes a standard loan term (e.g., 60 months) and average APR (e.g., 5%) // PMT = P * [r(1+r)^n] / [(1+r)^n – 1] // P = PMT * [(1+r)^n – 1] / [r(1+r)^n] var loanTermMonths = 60; var annualInterestRate = 0.05; // 5% APR var monthlyInterestRate = annualInterestRate / 12; var maxAffordableCarPrice = 0; if (targetMonthlyCarPayment > 0 && monthlyInterestRate > 0 && loanTermMonths > 0) { maxAffordableCarPrice = targetMonthlyCarPayment * ((Math.pow(1 + monthlyInterestRate, loanTermMonths) – 1) / (monthlyInterestRate * Math.pow(1 + monthlyInterestRate, loanTermMonths))); maxAffordableCarPrice = Math.round(maxAffordableCarPrice); } else if (targetMonthlyCarPayment > 0) { maxAffordableCarPrice = Math.round(targetMonthlyCarPayment * loanTermMonths); // Simple calculation if interest rate is 0 } // Update Results Display document.getElementById('maxAffordableCarPriceValue').textContent = '$' + maxAffordableCarPrice.toLocaleString(undefined, {minimumFractionDigits: 0, maximumFractionDigits: 0}); document.getElementById('recommendedMonthlyPaymentValue').textContent = '$' + targetMonthlyCarPayment.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('disposableIncomeValue').textContent = '$' + monthlyDisposableIncomeRemaining.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('mainResultValue').textContent = affordabilityScorePercent.toFixed(1) + '%'; // Update Table Data document.getElementById('tableAnnualIncome').textContent = '$' + annualIncome.toLocaleString(); document.getElementById('tableMonthlyHousing').textContent = '$' + monthlyRentMortgage.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('tableOtherDebts').textContent = '$' + otherDebtPayments.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('tableDisposableIncomePreCar').textContent = '$' + disposableIncomePreCar.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('tableRecommendedMaxPayment').textContent = '$' + targetMonthlyCarPayment.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('tableEstInsurance').textContent = '$' + estimatedMonthlyInsurance.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('tableEstFuel').textContent = '$' + estimatedMonthlyFuel.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('tableEstMaintenance').textContent = '$' + estimatedMonthlyMaintenance.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('tableTotalCarCosts').textContent = '$' + totalEstimatedCarCosts.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('tableAffordabilityScore').textContent = affordabilityScorePercent.toFixed(1) + '%'; // Update Chart Data if (expenseChart && expenseChart.data && expenseChart.data.datasets && expenseChart.data.datasets[0]) { expenseChart.data.datasets[0].data = [ targetMonthlyCarPayment, estimatedMonthlyInsurance, estimatedMonthlyFuel, estimatedMonthlyMaintenance ]; expenseChart.update(); } else { initializeChart(); // Initialize if not already done or if chart is missing // Re-update after initialization if (expenseChart && expenseChart.data && expenseChart.data.datasets && expenseChart.data.datasets[0]) { expenseChart.data.datasets[0].data = [ targetMonthlyCarPayment, estimatedMonthlyInsurance, estimatedMonthlyFuel, estimatedMonthlyMaintenance ]; expenseChart.update(); } } } function resetForm() { document.getElementById('annualIncome').value = '75000'; document.getElementById('monthlyRentMortgage').value = '1500'; document.getElementById('otherDebtPayments').value = '500'; document.getElementById('targetMonthlyCarPayment').value = '400'; document.getElementById('estimatedMonthlyInsurance').value = '150'; document.getElementById('estimatedMonthlyFuel').value = '100'; document.getElementById('estimatedMonthlyMaintenance').value = '50'; // Clear errors document.getElementById('annualIncomeError').textContent = "; document.getElementById('monthlyRentMortgageError').textContent = "; document.getElementById('otherDebtPaymentsError').textContent = "; document.getElementById('targetMonthlyCarPaymentError').textContent = "; document.getElementById('estimatedMonthlyInsuranceError').textContent = "; document.getElementById('estimatedMonthlyFuelError').textContent = "; document.getElementById('estimatedMonthlyMaintenanceError').textContent = "; // Reset results display to default document.getElementById('maxAffordableCarPriceValue').textContent = '–'; document.getElementById('recommendedMonthlyPaymentValue').textContent = '–'; document.getElementById('disposableIncomeValue').textContent = '–'; document.getElementById('mainResultValue').textContent = '–'; // Reset table to default document.getElementById('tableAnnualIncome').textContent = '–'; document.getElementById('tableMonthlyHousing').textContent = '–'; document.getElementById('tableOtherDebts').textContent = '–'; document.getElementById('tableDisposableIncomePreCar').textContent = '–'; document.getElementById('tableRecommendedMaxPayment').textContent = '–'; document.getElementById('tableEstInsurance').textContent = '–'; document.getElementById('tableEstFuel').textContent = '–'; document.getElementById('tableEstMaintenance').textContent = '–'; document.getElementById('tableTotalCarCosts').textContent = '–'; document.getElementById('tableAffordabilityScore').textContent = '–'; // Reset chart data to zero if (expenseChart && expenseChart.data && expenseChart.data.datasets && expenseChart.data.datasets[0]) { expenseChart.data.datasets[0].data = [0, 0, 0, 0]; expenseChart.update(); } } function copyResults() { var resultsText = "— Car Affordability Summary —\n\n"; resultsText += "Maximum Affordable Car Price: " + document.getElementById('maxAffordableCarPriceValue').textContent + "\n"; resultsText += "Recommended Max Monthly Car Payment: " + document.getElementById('recommendedMonthlyPaymentValue').textContent + "\n"; resultsText += "Monthly Disposable Income Remaining: " + document.getElementById('disposableIncomeValue').textContent + "\n"; resultsText += "Car Affordability Score: " + document.getElementById('mainResultValue').textContent + "\n\n"; resultsText += "— Key Assumptions —\n"; resultsText += "Annual Gross Income: " + document.getElementById('tableAnnualIncome').textContent + "\n"; resultsText += "Monthly Housing Costs: " + document.getElementById('tableMonthlyHousing').textContent + "\n"; resultsText += "Other Monthly Debts: " + document.getElementById('tableOtherDebts').textContent + "\n"; resultsText += "Estimated Monthly Insurance: " + document.getElementById('tableEstInsurance').textContent + "\n"; resultsText += "Estimated Monthly Fuel: " + document.getElementById('tableEstFuel').textContent + "\n"; resultsText += "Estimated Monthly Maintenance: " + document.getElementById('tableEstMaintenance').textContent + "\n"; resultsText += "Total Estimated Monthly Car Costs: " + document.getElementById('tableTotalCarCosts').textContent + "\n"; // Use a temporary textarea to copy text var textArea = document.createElement("textarea"); textArea.value = resultsText; document.body.appendChild(textArea); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied!' : 'Copying failed'; // Optional: Display feedback to user var copyButton = document.querySelector('button[onclick="copyResults()"]'); var originalText = copyButton.textContent; copyButton.textContent = msg; setTimeout(function() { copyButton.textContent = originalText; }, 2000); } catch (err) { console.log('Oops, unable to copy'); } document.body.removeChild(textArea); } // Initialize FAQ toggles function initFAQ() { var faqQuestions = document.querySelectorAll('.faq-question'); for (var i = 0; i < faqQuestions.length; i++) { faqQuestions[i].addEventListener('click', function() { var faqItem = this.parentNode; faqItem.classList.toggle('active'); }); } } // Initialize chart and FAQ on page load document.addEventListener('DOMContentLoaded', function() { initializeChart(); initFAQ(); // Pre-fill with default values and calculate initially resetForm(); calculateAffordability(); // Perform initial calculation with defaults });

Leave a Comment