Calculation disclaimer

These calculators are for education and comparison of stated assumptions. Results are not financial, tax, investment, or legal advice. They do not establish an actual amount due, tax deduction, account yield, or guaranteed investment return.

Model limits

Loan tools assume a constant nominal interest rate and regular monthly principal-and-interest payments over the entered term. They exclude additional payments, irregular payment dates, late charges, taxes, insurance, other fees, and balloon balances. Beginning-of-period timing is an annuity convention for formula comparison.

The savings tool assumes a single deposit and an unchanged nominal rate, with no later deposits, withdrawals, fees, taxes, or inflation adjustment. The credit card tool assumes one balance, daily compounding on the stated basis, equal monthly periods, and fixed payments at period end. It excludes new charges, promotional terms, grace periods, fees, and multiple APR categories.

Calculated totals and records

Displayed values are rounded after calculations. Actual providers may round intermediate amounts or use other accrual conventions. Official examples identify formula inputs and methods; they are not product offers or current market rates. Check your agreement and provider records for actual amounts. Consult a qualified professional for advice about a specific decision.

Read about the methods and sources or return to the cumulative interest calculator.