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Flat vs Reducing Balance Interest Comparison Calculator

Compare flat interest rates directly against diminishing/reducing balance loans to uncover the real effective APR and save money on financing.

Flat Rate vs Reducing Balance Interest Comparison

Unmask the hidden cost of flat rate interest loans by comparing them directly against diminishing balance APR.

Loan Amount ($)

Interest Rate %

Tenure (Years)

Flat Rate Method

Total Interest

$2,100.00

Effective APR: 12.8%

Reducing Balance Method

Total Interest

$1,116.00

Saves: $984.00

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✨ Key Capabilities

Side-by-side total interest comparison
Effective APR conversion formula for flat rate loans
Total dollar savings highlighted in green
Helps avoid predatory flat-rate lending terms
Dynamic loan principal and tenure adjustments

📖 How to Use the Flat vs Reducing Balance Interest Comparison Calculator

Enter loan principal, interest rate %, and term in years.
Compare the red "Flat Rate" card with the green "Reducing Balance" card.
Check the total savings and effective APR to negotiate better bank terms.

❓ Frequently Asked Questions

Why do banks quote flat rates instead of reducing balance?

Banks often quote flat rates because the percentage looks deceptively low (e.g. 5% flat), even though the real effective reducing interest rate is nearly 9.5%.

Which loan structure is better for borrowers?

A reducing balance loan is almost always superior and cheaper because interest is only charged on your outstanding balance, saving thousands in interest.