A $125,000 fixed-rate mortgage at 4.5% APR paid over 20 years costs $790.81 per month. Over the life of the loan you would pay $64,795 in interest — 52% of the amount borrowed.
The 4.5% rate on this page is 1.93 points below this week's national average of 6.43% for a 30-year fixed mortgage (Freddie Mac PMMS, July 2, 2026).
| Period | Principal paid | Interest paid | Balance |
|---|
| Scenario | Monthly | Total interest |
|---|---|---|
| $125,000 at 4% (20yr) | $757.48 | $56,794 |
| $125,000 at 4.25% (20yr) | $774.04 | $60,770 |
| $125,000 at 4.5% (20yr) ← this page | $790.81 | $64,795 |
| $125,000 at 4.75% (20yr) | $807.78 | $68,867 |
| $125,000 at 5% (20yr) | $824.94 | $72,987 |
| $125,000 at 5.25% (20yr) | $842.31 | $77,153 |
| $125,000 at 5.5% (20yr) | $859.86 | $81,366 |
| $125,000 at 5.75% (20yr) | $877.60 | $85,625 |
| $125,000 at 6% (20yr) | $895.54 | $89,929 |
| $125,000 at 6.25% (20yr) | $913.66 | $94,278 |
| $125,000 at 6.5% (20yr) | $931.97 | $98,672 |
| $125,000 at 6.75% (20yr) | $950.46 | $103,109 |
| $125,000 at 7% (20yr) | $969.12 | $107,590 |
| $125,000 at 7.25% (20yr) | $987.97 | $112,113 |
| $125,000 at 7.5% (20yr) | $1,006.99 | $116,678 |
| $125,000 at 7.75% (20yr) | $1,026.19 | $121,285 |
| $125,000 at 8% (20yr) | $1,045.55 | $125,932 |
| $125,000 at 8.5% (20yr) | $1,084.78 | $135,347 |
| $125,000 at 9% (20yr) | $1,124.66 | $144,918 |