The short answer: at a 6.5% rate, a $100,000 30-year fixed mortgage costs $632.07 a month in principal and interest; at 7%, $665.30. On a 15-year term at 6.5% the payment is $871.11. Taxes, insurance, HOA and mortgage insurance (if you put less than 20% down) come on top — open this loan in the full calculator to add them and see the complete amortization schedule.
| Rate | 30-year | 20-year | 15-year |
|---|---|---|---|
| 5.00% | $536.82 | $659.96 | $790.79 |
| 5.25% | $552.20 | $673.84 | $803.88 |
| 5.50% | $567.79 | $687.89 | $817.08 |
| 5.75% | $583.57 | $702.08 | $830.41 |
| 6.00% | $599.55 | $716.43 | $843.86 |
| 6.25% | $615.72 | $730.93 | $857.42 |
| 6.50% | $632.07 | $745.57 | $871.11 |
| 6.75% | $648.60 | $760.36 | $884.91 |
| 7.00% | $665.30 | $775.30 | $898.83 |
| 7.25% | $682.18 | $790.38 | $912.86 |
| 7.50% | $699.21 | $805.59 | $927.01 |
At 6.5%, interest alone on $100,000 runs about $541.67 per month — roughly $17.81 every day. That's the number amortization slowly kills: each payment shrinks the balance, so each month a little less goes to interest and a little more to principal. See the month-by-month schedule, or try our daily interest calculator for per-diem closing math.
Principal and interest is the floor, not the payment. A realistic budget adds property taxes, homeowners insurance, HOA dues, and — under 20% down — mortgage insurance, which our full calculator prices the way a lender does: FHA and USDA from the official tables, VA's funding fee, and conventional PMI by credit score.
A common guideline caps total housing costs near 28–36% of gross income, but real qualifying depends on your full debt picture, credit and loan program. Build the complete payment in the calculator, then ask a licensed professional — Phil answers questions free.
With 20% down, a $100,000 loan buys about $125,000 of house; with 5% down, about $105,263. Enter your own down payment in the payment calculator and the price, loan and LTV solve automatically.
Nearby loan amounts: $125,000