What Is a Reducing Balance Interest Rate?
A reducing balance rate (also called a declining balance rate) charges interest only on the loan amount still outstanding. As each payment lowers the balance, the interest portion of the next payment gets smaller. Most mortgages and standard installment loans use this method.
How It Works
Each month, interest = outstanding balance × monthly rate. The rest of the fixed payment reduces the principal, so over time more of each payment goes to principal.
Reducing vs. Flat Rate
At the same headline rate, a reducing balance loan always costs less in total interest than a flat-rate loan, because the flat method keeps charging interest on money already repaid.
🧮 Calculate It Yourself
Put Reducing Balance Rate into practice with these free calculators — no sign-up, nothing stored.
⚖️
Flat vs. Reducing Balance Rate Calculator
Compare flat and reducing-balance loans and find the true effective rate.
Calculate →
📅
Amortization Schedule Calculator
See your full year-by-year loan breakdown and what an extra payment saves.
Calculate →
💳
Loan Calculator (EMI)
Works for any loan type — find your monthly payment and total interest.
Calculate →
🔗 Related Terms
More Loans & Credit Terms
- APR (Annual Percentage Rate)
- Auto Loan
- Balance Transfer
- Balloon Payment
- Buy Now, Pay Later (BNPL)
- Cash Advance
📖 Browse all glossary terms or explore all free calculators.
Last updated: September 27, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.