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Reducing Balance Loan Calculator : Diminishing Principal Interest

In reducing balance loans, interest is charged only on the unpaid principal balance at the start of each month. As you pay down debt, interest charges decrease, saving you substantial money.

Interactive Calculator

100% Client-Side Engine
%
yrs
Reducing Monthly Installment
$313.36 / mo
Principal Balance
$10,000
Diminishing Interest Cost
$1,281.09
Total Loan Repayment
$11,281.09

Step-by-Step Examples

$10,000 at 8% Reducing Balance for 3 Years

Reducing balance loan computation.

Inputs: Principal: $10,000, Reducing Rate: 8%, Term: 3 Years
Result: Monthly Payment: $313.36, Total Interest: $1,281.09

Total interest is only $1,281.09 compared to $2,400 under an 8% flat rate.

How to Use This Tool

  1. Enter principal loan amount.
  2. Enter annual reducing interest rate.
  3. Specify loan term in years.
  4. Review the decreasing interest trajectory and monthly installment.

Frequently Asked Questions

Reducing balance is the global standard for fair consumer lending because borrowers only pay for the capital they actually retain each month.