The Joshua Kennon-Green Amortization Calculator

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Enter loan details in the Amortization Parameters section. Leave exactly one core field blank to solve for it.

Amortization Parameters

Principal ($)

Annual Interest Rate (%)

Balloon Payment ($)

Payments per Year

Number of Regular Payments

Payment Amount ($)

Optional Calendar Start Date

Used for the payment date column and extra principal payment dates.

Organize Amortization Table by Calendar Quarters

Advanced: Extra Principal Payments

Extra Principal Payment ($)

Payment Frequency

Extra principal is applied in addition to the regular payment schedule. To display Extra Principal Payments in the Amortization Schedule, you must enter an Optional Calendar Start Date in the Amortization Parameters section.

This Amortization Calculator is provided as-is with no guarantee, warranty, or assurance of any kind. By using it or any output it has generated, you understand and agree that it is your responsibility to independently verify any calculations.