Loan Affordability Calculator

Turn the monthly payment you can afford into a loan amount.

Educational estimate only. We are not a lender or advisor, and this is not financial or credit advice.

Start from your budget

Instead of asking what a loan costs, ask how much you can safely repay. Enter a monthly payment, an APR and a term, and the calculator works out the largest loan that fits.

The formula

This is the present value of your payments: loan = payment x (1 - (1 + r)^-n) / r, with r as the monthly rate and n as the number of months.

Example

A $400 monthly payment at 9% APR over 60 months supports a loan of about $19,270. Over 84 months the same payment supports a larger loan, but at a higher total interest cost.

How to pick a payment

Many lenders look at your debt-to-income ratio. Use the DTI calculator to check that a new payment keeps your total debts in a healthy range.

Remember

Lenders also consider credit history and income. This tool shows the maths, not an approval.

Frequently asked questions

Why does a longer term raise the loan amount?

The same payment is spread over more months, so it supports more borrowing.

Should I borrow the maximum?

Rarely. Leave room in the budget for surprises.

Does this include fees?

No. Fees reduce the amount you actually receive.

Built and reviewed by The Smart Loans Guide team. Last updated October 2026. How we write.

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