Real numbers by loan size. Not estimates — actual payment math at each rate level. Built by a 23-year banker who reviewed these numbers daily.
| Loan Amount | At 7.0% | At 6.5% | Monthly Savings | 30-Year Savings |
|---|---|---|---|---|
| $200,000 | $1,331 | $1,264 | $67/mo | $24,120 |
| $300,000 | $1,996 | $1,896 | $100/mo | $36,000 |
| $400,000 | $2,661 | $2,528 | $133/mo | $47,880 |
| $500,000 | $3,327 | $3,160 | $167/mo | $60,120 |
| $600,000 | $3,992 | $3,792 | $200/mo | $72,000 |
| $800,000 | $5,323 | $5,056 | $267/mo | $96,120 |
| Loan Amount | At 7.0% | At 6.0% | Monthly Savings | 30-Year Savings |
|---|---|---|---|---|
| $200,000 | $1,331 | $1,199 | $132/mo | $47,520 |
| $300,000 | $1,996 | $1,799 | $197/mo | $70,920 |
| $400,000 | $2,661 | $2,398 | $263/mo | $94,680 |
| $500,000 | $3,327 | $2,998 | $329/mo | $118,440 |
| $600,000 | $3,992 | $3,597 | $395/mo | $142,200 |
| $800,000 | $5,323 | $4,796 | $527/mo | $189,720 |
| Credit Score | Typical Rate | Payment on $400K | vs 740 Score | 30-Year Cost |
|---|---|---|---|---|
| 580-619 | ~7.8% | $2,873 | +$475/mo | +$171,000 |
| 620-659 | ~7.5% | $2,797 | +$399/mo | +$143,640 |
| 660-699 | ~7.1% | $2,693 | +$295/mo | +$106,200 |
| 700-719 | ~6.8% | $2,614 | +$216/mo | +$77,760 |
| 720-739 | ~6.4% | $2,504 | +$106/mo | +$38,160 |
| 740+ | ~6.1% | $2,398 | Best rate | Baseline |
The difference between a 580 score and a 740 score on a $400,000 mortgage is $475/month — or $171,000 over 30 years. Same house. Same bank. Different number.
Enter your current score and loan amount — see exactly what improvement would save.
📊 Simulate My Score → 🏦 Ask ZaiP&I only. Rates are illustrative based on typical market spreads by credit tier. Actual rates vary by lender, loan type, and market conditions. Not financial advice.