// pre-computed reference
10-year mortgage at 8.0%: total interest by loan amount
Exact principal-and-interest figures for a fixed-rate 10-year mortgage at
8.0%, computed with the standard amortization formula. For your own numbers, use the
interactive calculator.
| Loan amount | Monthly P&I | Total interest |
Total paid | Interest % of loan |
|---|
| $100,000 | $1,213 | $45,593 | $145,593 | 46% |
| $200,000 | $2,427 | $91,186 | $291,186 | 46% |
| $300,000 | $3,640 | $136,779 | $436,779 | 46% |
| $400,000 | $4,853 | $182,373 | $582,373 | 46% |
| $500,000 | $6,066 | $227,965 | $727,965 | 46% |
At 8.0% over 10 years, every dollar borrowed costs about
46 cents in interest. A 10-year term is the aggressive payer's choice: the principal-over-interest crossover arrives almost immediately, which is why its totals are a fraction of longer terms.
See the term comparison or the
extra payment calculator to shrink these numbers.
10-year at other rates: 4.0% · 4.5% · 5.0% · 5.5% · 6.0% · 6.5% · 7.0% · 7.5%
8.0% at other terms: 15-year · 20-year · 25-year · 30-year
Frequently asked questions
How much interest on a $400,000 mortgage at 8.0% for 10 years?
Total interest is about $182,373, with a monthly principal-and-interest payment of $4,853. That's 46% of the amount borrowed, before taxes and insurance.
Is 8.0% a good rate for a 10-year mortgage?
Rates move with the market and your credit profile; compare current quotes from several lenders. Whatever your rate, the table above shows what it costs in total interest.
How can I pay less than $182,373 in interest?
Pay extra toward principal, choose a shorter term, or refinance if rates drop. Use the extra payment calculator to see your exact savings.
How is the 10-year payment at 8.0% calculated?
With the standard amortization formula — P·r(1+r)ⁿ/((1+r)ⁿ−1) — over 120 monthly payments, computed to the cent. The full formula and rounding rules are on our methodology page.