This is a simplified estimator. Actual FICO scores are calculated by proprietary algorithms and may differ.
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Years
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e.g., Credit Cards, Mortgages, Auto Loans
Your estimated FICO Score will appear here.
Understanding How Your FICO Score is Calculated
Your FICO Score is a three-digit number that lenders use to assess your credit risk. It's a crucial component in determining whether you'll be approved for loans, credit cards, and even influences interest rates and insurance premiums. While the exact FICO algorithm is a closely guarded secret, the scoring model is based on five main categories, each with a different weight:
The Five FICO Score Factors (and their approximate weight):
Payment History (approx. 35%): This is the most critical factor. It looks at whether you've paid your bills on time. Late payments, bankruptcies, and collections significantly hurt your score. Consistently paying on time builds a positive history.
Amounts Owed (Credit Utilization) (approx. 30%): This category examines how much of your available credit you're using. A high credit utilization ratio (using a large percentage of your credit limits) suggests you might be overextended and can negatively impact your score. Keeping utilization below 30% is generally recommended, with lower being better.
Length of Credit History (approx. 15%): This looks at the age of your credit accounts. A longer credit history generally suggests more experience managing credit, which is viewed favorably. It includes the age of your oldest account, the age of your newest account, and the average age of all your accounts.
Credit Mix (New Credit) (approx. 10%): This factor considers the different types of credit you use (e.g., credit cards, installment loans like mortgages or auto loans) and how often you apply for new credit. Having a mix of credit types can be positive, but opening too many new accounts in a short period can be a red flag. Hard inquiries (when you apply for credit) can slightly lower your score.
New Credit (approx. 10%): This refers to how many new accounts you've opened and how many recent credit inquiries you have. Opening several new credit accounts in a short period can increase your risk in the eyes of lenders, as it might indicate financial distress.
How This Calculator Works (Simplified):
This calculator provides a simplified estimation based on the general weighting of the FICO score factors. It assigns points or penalties based on the ranges you provide for each category. It does NOT reflect the complex, non-linear calculations FICO uses, nor does it account for all nuances within each category (like the severity of late payments or the specific types of credit mix).
Important Note: This calculator is for educational purposes only. It is not a substitute for obtaining your actual FICO Score from a credit bureau or a lender.
Tip: Focus on paying all bills on time, keeping credit card balances low, and avoiding unnecessary credit applications to maintain a healthy credit score.
function calculateFicoScore() {
var paymentHistory = parseFloat(document.getElementById("paymentHistory").value);
var creditUtilization = parseFloat(document.getElementById("creditUtilization").value);
var averageAge = parseFloat(document.getElementById("averageAge").value);
var creditInquiries = parseFloat(document.getElementById("creditInquiries").value);
var typesOfCredit = parseFloat(document.getElementById("typesOfCredit").value);
var resultDiv = document.getElementById("result");
var estimatedScore = 300; // Starting base score
// — Simplified Scoring Logic —
// 1. Payment History (approx. 35%) – Heavily weighted
if (isNaN(paymentHistory) || paymentHistory 100) {
resultDiv.innerHTML = "Please enter a valid percentage for Payment History (0-100%).";
return;
}
if (paymentHistory >= 99) {
estimatedScore += 350; // Max points for very good history
} else if (paymentHistory >= 95) {
estimatedScore += 250;
} else if (paymentHistory >= 90) {
estimatedScore += 150;
} else if (paymentHistory >= 80) {
estimatedScore += 50;
} else {
// Significant deductions for lower payment history
estimatedScore -= 100;
}
// Add small bonus for 100%
if (paymentHistory === 100) {
estimatedScore += 50;
}
// 2. Amounts Owed (Credit Utilization) (approx. 30%) – Heavily weighted
if (isNaN(creditUtilization) || creditUtilization 100) {
resultDiv.innerHTML = "Please enter a valid percentage for Credit Utilization (0-100%).";
return;
}
if (creditUtilization <= 10) {
estimatedScore += 300; // Max points for low utilization
} else if (creditUtilization <= 30) {
estimatedScore += 200;
} else if (creditUtilization <= 50) {
estimatedScore += 100;
} else if (creditUtilization <= 70) {
estimatedScore += 50;
} else {
estimatedScore -= 150; // Significant deduction for high utilization
}
// Bonus for zero utilization (though not always practical)
if (creditUtilization === 0) {
estimatedScore += 50;
}
// 3. Length of Credit History (approx. 15%)
if (isNaN(averageAge) || averageAge = 15) {
estimatedScore += 150; // Max points for long history
} else if (averageAge >= 10) {
estimatedScore += 100;
} else if (averageAge >= 7) {
estimatedScore += 70;
} else if (averageAge >= 5) {
estimatedScore += 40;
} else {
estimatedScore += 10; // Small boost for any history
}
// 4. Credit Mix (approx. 10%)
if (isNaN(typesOfCredit) || typesOfCredit = 4) {
estimatedScore += 100; // Good mix
} else if (typesOfCredit >= 3) {
estimatedScore += 70;
} else if (typesOfCredit >= 2) {
estimatedScore += 40;
} else {
estimatedScore += 10; // Minimal score for single type
}
// 5. New Credit (approx. 10%) – Inquiries and new accounts
if (isNaN(creditInquiries) || creditInquiries < 0) {
resultDiv.innerHTML = "Please enter a valid number for Recent Credit Inquiries.";
return;
}
if (creditInquiries === 0) {
estimatedScore += 100; // Max points for no recent inquiries
} else if (creditInquiries <= 2) {
estimatedScore += 50;
} else if (creditInquiries 850) {
estimatedScore = 850 – (estimatedScore – 850) / 2; // Slightly penalize if it goes too high
}
if (estimatedScore < 300) {
estimatedScore = 300 + (300 – estimatedScore) / 2; // Slightly reward if it goes too low
}
// Final clamping
estimatedScore = Math.max(300, Math.min(850, estimatedScore));
// Display the result
resultDiv.innerHTML = "Estimated FICO Score: " + Math.round(estimatedScore);
}