Does this calculate my loan payment?

No. It tests whether a payment you already know (or estimate elsewhere) fits income guidelines.

Are insurance and fuel required?

Enter them under other monthly car costs so the total-cost guideline is meaningful. Leaving them at zero understates ownership cost.

Is this a lender decision?

No. Lenders use credit, collateral, and their own DTI policies. This page is educational arithmetic only.

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Car Affordability Calculator

Check a payment and a broader ownership-cost ceiling against income—before you shop the lot.

Payment ceiling

Total cost ceiling

Optional payment comparison

Computes payment and total car-budget ceilings from income and guideline percents, then optionally compares a proposed payment plus other monthly car costs.

Limitation: Educational guideline worksheet only—not auto lending, insurance quoting, or financial advice.

Jump to calculator · Sources & review

Free Calculators HubCar Affordability Calculator

CurrencyMonthly incomeGross is common in teaching rules of thumb; take-home may fit your budget better.Payment guideline (% of income)Teaching default 10 (aligned with many 20/4/10 summaries for the payment slice).Total car-cost guideline (% of income)Payment + insurance, fuel, maintenance, parking. Default 20.Proposed monthly payment (optional)Loan or lease payment before other ownership costs.Other monthly car costsInsurance, fuel, maintenance reserve, parking, tolls.

How to Gauge Car Affordability

Separate the loan/lease payment from insurance, fuel, and maintenance so total cost is visible.

Choose a display currency.

Need an exact payment?

Use the car payment calculator for principal, rate, and term math—then bring that payment here for the income test.

What the Car Affordability Result Means

Primary output is the payment ceiling. Details show the total ownership budget and, when a payment is entered, percent-of-income and headroom figures.

Car Affordability Examples

Payment under guideline

Income and car cost inputs

monthlyIncome:6000

paymentGuidelinePercent:10

totalCostGuidelinePercent:20

proposedMonthlyPayment:450

otherMonthlyCarCosts:350

Max payment at guideline

600 max payment; 800 total proposed; under both

Payment is 7.5% of income; total costs are about 13.3%.

Total costs over guideline

Income and car cost inputs

monthlyIncome:4000

paymentGuidelinePercent:10

totalCostGuidelinePercent:20

proposedMonthlyPayment:500

otherMonthlyCarCosts:400

Max payment at guideline

400 max payment; 900 total proposed; over

Payment alone exceeds 10%; combined costs are 22.5% of income.

After you calculate

Stress-test the payment inside a monthly budget and check total debt load with the DTI calculator.

Frequently Asked Questions

A popular teaching shorthand: aim for about 20% down, a loan term around four years, and total vehicle costs near 10% of gross income in some versions. This tool lets you set payment and total-cost percents explicitly instead of freezing one slogan.

Still have questions about this calculation?

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Car Affordability Formulas

No credit score, APR table, or residual-value model is used.

Formula

monthly income × payment guideline% ÷ 100

Payment ceiling

monthly income × payment guideline% ÷ 100

Total car budget

monthly income × total cost guideline% ÷ 100

Total proposed costs

proposed payment + other monthly car costs

Scientific Background

Assumptions: one month, user-chosen guidelines, other costs entered by the user. Limitations: taxes, warranties, depreciation, and lender DTI rules are out of scope. Inspired by popular 20/4/10 teaching summaries—not a bank policy.

Sources & review

Car Affordability Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.

Last reviewed

July 22, 2026

Consumer financial tools
Consumer Financial Protection Bureau (CFPB)
https://www.consumerfinance.gov/consumer-tools/auto-loans/
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