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Interest Only Loan

Calculate interest-only payments and the final principal obligation.

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Local calculations. Results are estimates, not professional advice.

Monthly interest-only payment

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Educational estimate using your entered assumptions; no live prices, tax rules or guaranteed returns.

Formula

Monthly interest is I = Pr/12 and term interest is nI. P is principal, r is the nominal annual interest fraction, and n is months. Interest-only payments leave the principal due.

Calculate interest-only payments and the final principal obligation.

Worked example

Principal
100000
Nominal annual interest rate (%)
6
Term in months
12
Monthly interest-only payment
500
Interest over entered term
6,000
Principal still due
100,000

Scope and limitations

Educational estimate using your entered assumptions; no live prices, tax rules or guaranteed returns.

Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.

Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.

Formula version: b0f2a330c4ac · Example checked:

Methodology

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