Nm Tax Rate Calculator

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Mortgage Payment Calculator
Principal & Interest: $0.00
Monthly Property Tax: $0.00
Monthly Insurance: $0.00
Total Monthly Payment: $0.00

Understanding Your Mortgage Calculation

Buying a home is likely the largest financial commitment you will make in your lifetime. Understanding how your monthly mortgage payment is calculated is crucial for budgeting and long-term financial planning. Our Mortgage Calculator breaks down the costs associated with your loan, helping you see exactly where your money goes every month.

Components of a Mortgage Payment (PITI)

Mortgage lenders often refer to your monthly payment as PITI, which stands for:

  • Principal: The portion of your payment that goes toward paying down the loan balance (the price of the home minus your down payment).
  • Interest: The fee charged by the lender for borrowing the money. In the early years of a mortgage, a large percentage of your payment goes toward interest.
  • Taxes: Property taxes assessed by your local government. Lenders typically collect this monthly and hold it in an escrow account to pay the bill annually.
  • Insurance: Homeowners insurance protects your property against damage. Like taxes, this is usually collected monthly and paid by the lender on your behalf.

How Interest Rates Affect Your Buying Power

Even a small difference in interest rates can have a massive impact on your monthly payment and the total cost of the loan. For example, on a $300,000 loan, a 1% increase in interest rate can raise your monthly payment by hundreds of dollars. It is essential to shop around for the best rate and improve your credit score before applying.

The Importance of the Down Payment

Your down payment plays a significant role in your mortgage math. A larger down payment reduces the principal amount you need to borrow, which lowers your monthly principal and interest payments. Additionally, if you put down at least 20% of the home's purchase price, you can typically avoid paying Private Mortgage Insurance (PMI), further reducing your monthly expenses.

Loan Term: 15-Year vs. 30-Year

The term of your loan dictates how long you will be making payments. A 30-year mortgage offers lower monthly payments but results in paying significantly more interest over the life of the loan. A 15-year mortgage has higher monthly payments, but you build equity faster and pay far less in total interest.

function calculateMortgage() { // 1. Get Input Values var homePrice = parseFloat(document.getElementById('mcHomePrice').value); var downPayment = parseFloat(document.getElementById('mcDownPayment').value); var interestRate = parseFloat(document.getElementById('mcInterestRate').value); var years = parseFloat(document.getElementById('mcLoanTerm').value); var annualTax = parseFloat(document.getElementById('mcPropertyTax').value); var annualInsurance = parseFloat(document.getElementById('mcInsurance').value); // 2. Validate Inputs if (isNaN(homePrice) || isNaN(downPayment) || isNaN(interestRate) || isNaN(years)) { alert("Please enter valid numbers for Home Price, Down Payment, Interest Rate, and Loan Term."); return; } // 3. Handle Defaults for optional fields if (isNaN(annualTax)) annualTax = 0; if (isNaN(annualInsurance)) annualInsurance = 0; // 4. Calculate Principal var principal = homePrice – downPayment; // Edge case: Down payment larger than price if (principal < 0) { principal = 0; } // 5. Calculate Monthly Principal & Interest (PI) // Formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ] var monthlyRate = (interestRate / 100) / 12; var numberOfPayments = years * 12; var monthlyPI = 0; if (interestRate === 0) { monthlyPI = principal / numberOfPayments; } else { monthlyPI = principal * (monthlyRate * Math.pow(1 + monthlyRate, numberOfPayments)) / (Math.pow(1 + monthlyRate, numberOfPayments) – 1); } // 6. Calculate Monthly Tax and Insurance var monthlyTax = annualTax / 12; var monthlyInsurance = annualInsurance / 12; // 7. Calculate Total var totalMonthly = monthlyPI + monthlyTax + monthlyInsurance; // 8. Update the DOM document.getElementById('resPrincipalInterest').innerHTML = "$" + monthlyPI.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); document.getElementById('resTax').innerHTML = "$" + monthlyTax.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); document.getElementById('resInsurance').innerHTML = "$" + monthlyInsurance.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); document.getElementById('resTotal').innerHTML = "$" + totalMonthly.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); // 9. Show Result Container document.getElementById('mcResultContainer').style.display = 'block'; }

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