The short answer: at a 6.5% rate, a $125,000 30-year fixed mortgage costs $790.09 a month in principal and interest; at 7%, $831.63. On a 15-year term at 6.5% the payment is $1,088.88. 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% | $671.03 | $824.94 | $988.49 |
| 5.25% | $690.25 | $842.31 | $1,004.85 |
| 5.50% | $709.74 | $859.86 | $1,021.35 |
| 5.75% | $729.47 | $877.60 | $1,038.01 |
| 6.00% | $749.44 | $895.54 | $1,054.82 |
| 6.25% | $769.65 | $913.66 | $1,071.78 |
| 6.50% | $790.09 | $931.97 | $1,088.88 |
| 6.75% | $810.75 | $950.46 | $1,106.14 |
| 7.00% | $831.63 | $969.12 | $1,123.54 |
| 7.25% | $852.72 | $987.97 | $1,141.08 |
| 7.50% | $874.02 | $1,006.99 | $1,158.77 |
At 6.5%, interest alone on $125,000 runs about $677.08 per month — roughly $22.26 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 $125,000 loan buys about $156,250 of house; with 5% down, about $131,579. Enter your own down payment in the payment calculator and the price, loan and LTV solve automatically.