Mortgage Amortization Calculator
See how each mortgage payment splits into interest and principal, year by year, and what extra payments save.
Change the values and press Calculate to work out your own figures.
Enter the price, down payment, term and rate.
| Year | Interest | Principal | Balance |
|---|---|---|---|
| 1 | $29,915.04 | $3,680.16 | $396,319.84 |
| 2 | $29,628.93 | $3,966.27 | $392,353.57 |
| 3 | $29,320.61 | $4,274.59 | $388,078.98 |
| 4 | $28,988.31 | $4,606.89 | $383,472.09 |
| 5 | $28,630.15 | $4,965.05 | $378,507.04 |
| 6 | $28,244.16 | $5,351.04 | $373,156.00 |
| 7 | $27,828.18 | $5,767.02 | $367,388.98 |
| 8 | $27,379.87 | $6,215.33 | $361,173.65 |
| 9 | $26,896.70 | $6,698.50 | $354,475.15 |
| 10 | $26,375.96 | $7,219.24 | $347,255.91 |
| 11 | $25,814.73 | $7,780.47 | $339,475.44 |
| 12 | $25,209.87 | $8,385.33 | $331,090.11 |
| 13 | $24,558.01 | $9,037.19 | $322,052.92 |
| 14 | $23,855.46 | $9,739.74 | $312,313.18 |
| 15 | $23,098.28 | $10,496.92 | $301,816.26 |
| 16 | $22,282.27 | $11,312.93 | $290,503.33 |
| 17 | $21,402.79 | $12,192.41 | $278,310.92 |
| 18 | $20,454.96 | $13,140.24 | $265,170.68 |
| 19 | $19,433.44 | $14,161.76 | $251,008.92 |
| 20 | $18,332.52 | $15,262.68 | $235,746.24 |
| 21 | $17,146.01 | $16,449.19 | $219,297.05 |
| 22 | $15,867.24 | $17,727.96 | $201,569.09 |
| 23 | $14,489.08 | $19,106.12 | $182,462.97 |
| 24 | $13,003.79 | $20,591.41 | $161,871.56 |
| 25 | $11,403.02 | $22,192.18 | $139,679.38 |
| 26 | $9,677.78 | $23,917.42 | $115,761.96 |
| 27 | $7,818.47 | $25,776.73 | $89,985.23 |
| 28 | $5,814.58 | $27,780.62 | $62,204.61 |
| 29 | $3,654.91 | $29,940.29 | $32,264.32 |
| 30 | $1,327.36 | $32,264.32 | $0.00 |
Show the working
- principal and interest = loan × i ÷ (1 − (1 + i)^−n)
- plus tax, insurance, PMI, HOA and other costs a month
How to use it
Enter the price, down payment, term and rate.
Enter amounts without commas or with them; rates are percentages (5 for 5%). Negative amounts are allowed where a sign means money paid out.
Key facts
each month: interest = balance × rate ÷ 12; principal = payment − interest
Questions
How much of the first payment is interest?
Most of it: on $400,000 at 7.51%, $2,503.33 of the first $2,799.60.
Formulas
each month: interest = balance × rate ÷ 12; principal = payment − interest
Sources
Limitations
- Results are estimates for planning, not offers or financial advice; lenders and banks may round, count days or time payments differently.
- Rates are nominal annual rates compounded as you choose; payments at a different frequency use the equivalent periodic rate.