Finance calculator
Interest-Only Loan Calculator
Estimate a fixed-rate interest-only phase followed by amortizing repayment using entered principal, rate, and terms.
All entered values remain in this browser tab. No account, upload, persistence, URL state, or remote calculation is used.
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Result
Formula and method
A fixed principal and rate remain unchanged during the interest-only phase; the full principal then amortizes over the remaining months. This is not a HELOC draw model.
Worked example
For $100,000 at 6% over 30 years with 5 interest-only years, the first payment is $500 and interest during that phase is $30,000.
Limitations
Excludes fees, variable rates, taxes, insurance, refinancing, balloon terms, lending eligibility, and financial advice.