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A level-payment amortization model

A fictional principal of 2,000 at 6% per year over thirteen end-year payments requires an unrounded model payment of 225.9202.

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Solve from present value

The initial principal equals the PV of the level payments under this fee-free constant-rate model. Divide 2,000 by the ordinary-annuity PV factor for thirteen periods at 6%.

Separate the interest and principal parts

Selected periods using the unrounded payment
PeriodOpening balanceInterestPrincipal repaidClosing balance
12,000120105.92021,894.0798
21,894.0798113.6448112.27541,781.8044
13213.132312.7879213.13230

Distinguish a rounded cash payment

The table is calculated using the full-precision payment before display rounding. Actually paying a rounded amount each period can leave a residual balance and require a final adjustment. Do not promise an exact zero balance from a rounded printed payment.

Read actual loan terms separately

A real agreement may have fees, irregular dates, payment-day conventions or a different interest quotation. This example is a mathematical amortization exercise, not a loan offer or a recommendation.

Further references