A $800,000 fixed-rate mortgage at 8% APR paid over 10 years costs $9,706.21 per month. Over the life of the loan you would pay $364,745 in interest — 46% of the amount borrowed.
The 8% rate on this page is 2.21 points above this week's national average of 5.79% for a 15-year fixed mortgage (Freddie Mac PMMS, July 2, 2026).
| Period | Principal paid | Interest paid | Balance |
|---|
| Scenario | Monthly | Total interest |
|---|---|---|
| $800,000 at 4% (10yr) | $8,099.61 | $171,953 |
| $800,000 at 4.25% (10yr) | $8,195.00 | $183,400 |
| $800,000 at 4.5% (10yr) | $8,291.07 | $194,929 |
| $800,000 at 4.75% (10yr) | $8,387.82 | $206,538 |
| $800,000 at 5% (10yr) | $8,485.24 | $218,229 |
| $800,000 at 5.25% (10yr) | $8,583.34 | $230,000 |
| $800,000 at 5.5% (10yr) | $8,682.10 | $241,852 |
| $800,000 at 5.75% (10yr) | $8,781.54 | $253,785 |
| $800,000 at 6% (10yr) | $8,881.64 | $265,797 |
| $800,000 at 6.25% (10yr) | $8,982.41 | $277,889 |
| $800,000 at 6.5% (10yr) | $9,083.84 | $290,061 |
| $800,000 at 6.75% (10yr) | $9,185.93 | $302,311 |
| $800,000 at 7% (10yr) | $9,288.68 | $314,641 |
| $800,000 at 7.25% (10yr) | $9,392.08 | $327,050 |
| $800,000 at 7.5% (10yr) | $9,496.14 | $339,537 |
| $800,000 at 7.75% (10yr) | $9,600.85 | $352,102 |
| $800,000 at 8% (10yr) ← this page | $9,706.21 | $364,745 |
| $800,000 at 8.5% (10yr) | $9,918.86 | $390,263 |
| $800,000 at 9% (10yr) | $10,134.06 | $416,087 |