Free online calculator
Interest Only Loan Calculator
Estimate monthly interest-only payment from loan amount and annual interest rate.
Quick Answer
How It Works
Interest-only monthly payment = loan principal × annual rate / 12.
- Enter loan amount and annual interest rate.
- Read monthly interest-only payment.
- Use estimate to compare against amortizing loan options.
Examples use USD-style formatting. Tax rates, fees, and legal rules vary by country and change over time — treat results as estimates and confirm important numbers with a qualified professional.
Interactive Calculator
Monthly interest-only payment: 1500.00
Example Use Case
A 300,000 loan at 6% has about 1,500 monthly interest-only payment.
Detailed Guide
Interest-only estimates are useful for understanding short-term payment relief versus long-term cost trade-offs.
Lower initial payments can hide repayment shocks when amortization begins.
Comparing interest-only and standard amortizing scenarios improves loan decision quality.
Use this tool for planning visibility, then confirm full schedule terms with lenders.
Assumptions and Limits
Principal is not reduced during interest-only period in this simplified estimate.
Common Mistakes to Avoid
- Treating interest-only payment as long-term affordability proof.
- Ignoring payment jump after IO period ends.
- Skipping total interest comparison with amortizing loans.
FAQ
Can I use this calculator for free?
Yes. This tool is free and designed for practical day-to-day decisions.
Why might results differ from another website?
Differences usually come from rounding rules, assumptions, or region-specific formulas.
Is this suitable for legal or financial advice?
No. Treat outputs as guidance and validate with qualified professionals for final decisions.
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How we choose formulas and check results: Methodology · Last reviewed 2026-07-25