A $325,000 fixed-rate mortgage at 4% APR paid over 20 years costs $1,969.44 per month. Over the life of the loan you would pay $147,665 in interest — 45% of the amount borrowed.
The 4% rate on this page is 2.43 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 |
|---|---|---|
| $325,000 at 4% (20yr) ← this page | $1,969.44 | $147,665 |
| $325,000 at 4.25% (20yr) | $2,012.51 | $158,003 |
| $325,000 at 4.5% (20yr) | $2,056.11 | $168,467 |
| $325,000 at 4.75% (20yr) | $2,100.23 | $179,054 |
| $325,000 at 5% (20yr) | $2,144.86 | $189,765 |
| $325,000 at 5.25% (20yr) | $2,189.99 | $200,598 |
| $325,000 at 5.5% (20yr) | $2,235.63 | $211,552 |
| $325,000 at 5.75% (20yr) | $2,281.77 | $222,625 |
| $325,000 at 6% (20yr) | $2,328.40 | $233,816 |
| $325,000 at 6.25% (20yr) | $2,375.52 | $245,124 |
| $325,000 at 6.5% (20yr) | $2,423.11 | $256,547 |
| $325,000 at 6.75% (20yr) | $2,471.18 | $268,084 |
| $325,000 at 7% (20yr) | $2,519.72 | $279,733 |
| $325,000 at 7.25% (20yr) | $2,568.72 | $291,493 |
| $325,000 at 7.5% (20yr) | $2,618.18 | $303,363 |
| $325,000 at 7.75% (20yr) | $2,668.08 | $315,340 |
| $325,000 at 8% (20yr) | $2,718.43 | $327,423 |
| $325,000 at 8.5% (20yr) | $2,820.43 | $351,902 |
| $325,000 at 9% (20yr) | $2,924.11 | $376,786 |