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Personal Loan APR: Why 8% vs 20% Means Nearly Three Times the Interest

By Smart Budget Sheets November 10, 2026
Same $10,000 loan, very different cost: what APR and term do to the total interest.

Two personal loans for the same $10,000 can look similar on the monthly payment line and still cost very different amounts. The APR decides most of it.

1. Same loan, different APR

$10,000 over 5 years (monthly payments, no fees):

  • 8% APR: about $203 a month, about $2,170 total interest
  • 12% APR: about $222 a month, about $3,350 total interest
  • 16% APR: about $243 a month, about $4,590 total interest
  • 20% APR: about $265 a month, about $5,900 total interest

The payment difference between 8% and 20% is about $62 a month. The interest difference is about $3,700.

2. Shorter term, less interest

At 12% APR, a 3-year term costs about $332 a month and about $1,960 in interest, versus about $3,350 over 5 years. If the higher payment fits, the shorter term saves real money.

3. Compare APR, not the headline rate

Origination fees are often taken out of the loan amount. APR includes them, so it’s the fairer comparison between lenders.

4. Check prequalification offers first

Many lenders show estimated rates with a soft credit check that doesn’t affect your score. Collect two or three before applying.

5. If it’s for card debt, close the gap

A consolidation loan only helps if the card balances don’t fill up again. Keep the cards open if that helps your credit utilisation, but take them off saved payment methods.

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General information, not financial advice. Figures are rounded examples.

#personalfinance #debt #loans
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