A $650,000 fixed-rate mortgage at 4.25% APR paid over 20 years costs $4,025.02 per month. Over the life of the loan you would pay $316,006 in interest — 49% of the amount borrowed.
The 4.25% rate on this page is 2.18 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 |
|---|---|---|
| $650,000 at 4% (20yr) | $3,938.87 | $295,329 |
| $650,000 at 4.25% (20yr) ← this page | $4,025.02 | $316,006 |
| $650,000 at 4.5% (20yr) | $4,112.22 | $336,933 |
| $650,000 at 4.75% (20yr) | $4,200.45 | $358,109 |
| $650,000 at 5% (20yr) | $4,289.71 | $379,531 |
| $650,000 at 5.25% (20yr) | $4,379.99 | $401,197 |
| $650,000 at 5.5% (20yr) | $4,471.27 | $423,104 |
| $650,000 at 5.75% (20yr) | $4,563.54 | $445,250 |
| $650,000 at 6% (20yr) | $4,656.80 | $467,632 |
| $650,000 at 6.25% (20yr) | $4,751.03 | $490,248 |
| $650,000 at 6.5% (20yr) | $4,846.23 | $513,094 |
| $650,000 at 6.75% (20yr) | $4,942.37 | $536,168 |
| $650,000 at 7% (20yr) | $5,039.44 | $559,466 |
| $650,000 at 7.25% (20yr) | $5,137.44 | $582,987 |
| $650,000 at 7.5% (20yr) | $5,236.36 | $606,725 |
| $650,000 at 7.75% (20yr) | $5,336.17 | $630,680 |
| $650,000 at 8% (20yr) | $5,436.86 | $654,847 |
| $650,000 at 8.5% (20yr) | $5,640.85 | $703,804 |
| $650,000 at 9% (20yr) | $5,848.22 | $753,572 |