Prepayment repayment with bonus

Allocate each prepayment between monthly and bonus balances by their remaining shares and recalculate.

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Calculation specification

Reviewed on:

Formula basis

After each scheduled payment, the prepayment is allocated in proportion to the remaining regular and bonus balances. Term reduction keeps payment targets; payment reduction recalculates both payment streams.

Calculation method

Applies prepayments to a loan that has separate monthly and bonus balances, then estimates the resulting term and interest.

Exclusions and checks required

  • Proportional allocation is a calculator assumption; a lender may prioritize one balance.
  • Fees, changing bonus amounts, actual-day interest, and acceptance-date effects are excluded.

Example input:：Prepaying a bonus-payment loan at payment 60

principalMan
3000
bonusPrincipalMan
600
method
annuity
rounding
floor
initialRate
1.5
initialYears
35
laterRate
1.5
termYears
35
termMonths
0
bonusPair
6,12
startMonth
2026-07
prepayments
60,100
prepaymentStrategy
reduceTerm

The result depends on this proportional-allocation model and can differ from an official lender estimate.

FAQ

Who is this calculator for? Prepayment repayment with bonus

Allocate each prepayment between monthly and bonus balances by their remaining shares and recalculate.

What values should I enter?

Applies to: Loan repayment / Prepayment is allocated to the regular and bonus balances in proportion to their outstanding amounts.

How should I interpret this estimate?

Applies prepayments to a loan that has separate monthly and bonus balances, then estimates the resulting term and interest.

How to use

  1. Enter your input values and press Calculate.
  2. Review the result and compare it with expected context.
  3. After each scheduled payment, the prepayment is allocated in proportion to the remaining regular and bonus balances. Term reduction keeps payment targets; payment reduction recalculates both payment streams.