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How to Calculate Interest Only

Calculate interest-only payments, principal & interest after IO period, and total interest.

The Formula

IOPayment = loanAmount * rate / 1200

The interest only formula uses the mathematical relationship: IOPayment = loanAmount * rate / 1200. Each variable in the formula represents a measurable quantity that affects the final result.

Step-by-Step Method

  1. 1Identify all input values needed for the interest only calculation.
  2. 2Substitute your known values into the formula: IOPayment = loanAmount * rate / 1200.
  3. 3Perform the arithmetic operations in the correct order (PEMDAS/BODMAS).
  4. 4Check that your result has the correct units and is within a reasonable range.
  5. 5Verify using the interactive Interest Only Calculator to confirm your answer.

Related Topics

interest onlyIO loanmortgageprincipal

Use the Interactive Calculator

Skip the manual math — get instant results with our free Interest Only calculator.

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