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Interest-Only Loan Calculator.

Calculate the monthly interest-only payment, total interest, and end-of-term principal for an interest-only loan.

Monthly interest payment
$0
Total interest
$0
Principal due at end
$0
Total paid (interest + principal)
$0
Assumes an interest-only period where you pay interest each month and repay the full principal at the end (no amortisation).

Enter your loan amount, annual interest rate, and interest-only term to see your monthly interest-only payment, total interest over the period, and how much principal is due at the end. Supports $ USD, £ GBP, and € EUR.

How to use

Choose your currency, enter the principal amount, the annual interest rate (%), and the interest-only term in years. The monthly interest payment and totals update immediately.

Examples

$10,000 at 12% for 1 year (interest-only) $100.00/month · $1,200 interest · $11,200 total
£200,000 at 5% for 2 years £833.33/month · £20,000 interest · £220,000 total
€50,000 at 3.5% for 3 years €145.83/month · €5,250 interest · €55,250 total

FAQ

Is this the same as a repayment loan?

No. Interest-only means you pay interest each month and the full principal is still owed at the end. A repayment (amortising) loan pays down principal over time.

Does this include fees or insurance?

No — it uses only the loan amount, rate, and term. Add any upfront fees into the loan amount if you want a rough estimate including them.

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Loan Calculator Calculate monthly loan repayments, total interest, and full amortization for any loan amount and currency. Percentage Calculator Calculate any percentage: find % of a number, % change between values, or what % one number is of another.

Privacy and data handling

This tool runs entirely in your browser. Nothing you type or paste is sent to any server — all processing happens locally on your device.