Loan Calculator
Enter the loan amount, the interest rate per installment, and the term to calculate the installment amount, the total paid and the total interest, then see the Price or SAC amortization table.
Amortization table
Price: the installment never changes. Early on most of it is interest; over time, more of it pays down the debt.
| Installment | Amount | Interest | Principal | Remaining balance |
|---|---|---|---|---|
| 1 | $279.56 | $125.00 | $154.56 | $4,845.44 |
| 2 | $279.56 | $121.14 | $158.43 | $4,687.01 |
| 3 | $279.56 | $117.18 | $162.39 | $4,524.62 |
| 4 | $279.56 | $113.12 | $166.45 | $4,358.17 |
| 5 | $279.56 | $108.95 | $170.61 | $4,187.56 |
| 6 | $279.56 | $104.69 | $174.88 | $4,012.69 |
| 7 | $279.56 | $100.32 | $179.25 | $3,833.44 |
| 8 | $279.56 | $95.84 | $183.73 | $3,649.71 |
| 9 | $279.56 | $91.24 | $188.32 | $3,461.39 |
| 10 | $279.56 | $86.53 | $193.03 | $3,268.36 |
| 11 | $279.56 | $81.71 | $197.86 | $3,070.50 |
| 12 | $279.56 | $76.76 | $202.80 | $2,867.70 |
| 13 | $279.56 | $71.69 | $207.87 | $2,659.83 |
| 14 | $279.56 | $66.50 | $213.07 | $2,446.76 |
| 15 | $279.56 | $61.17 | $218.40 | $2,228.37 |
| 16 | $279.56 | $55.71 | $223.85 | $2,004.51 |
| 17 | $279.56 | $50.11 | $229.45 | $1,775.06 |
| 18 | $279.56 | $44.38 | $235.19 | $1,539.87 |
| 19 | $279.56 | $38.50 | $241.07 | $1,298.81 |
| 20 | $279.56 | $32.47 | $247.09 | $1,051.71 |
| 21 | $279.56 | $26.29 | $253.27 | $798.44 |
| 22 | $279.56 | $19.96 | $259.60 | $538.84 |
| 23 | $279.56 | $13.47 | $266.09 | $272.75 |
| 24 | $279.56 | $6.82 | $272.75 | $0.00 |
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How it works
The installment, total paid and total interest at the top use the fixed-installment model of the Price table: PMT = PV × i / (1 − (1+i)^−n), where PV is the loan amount, i is the interest rate per installment (as a decimal) and n is the number of installments (term). Under Price the installment doesn't change over the term, but the split between interest and principal inside it shifts every installment. The amortization table below shows the schedule installment by installment and lets you switch between two systems. Price keeps the installment fixed. SAC (constant amortization) keeps the principal portion fixed, so the first installment is higher than Price and the installments fall every month; the total interest ends up lower because the balance drops faster. The first and last installment and the total interest shown above the table follow the system you pick.