Loan Early Payoff Calculator
See how extra payments shorten any amortizing loan and how much interest you'd save.
Inputs
| # | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $662.91 | $485.83 | $177.08 | $24,514.17 |
| 2 | $662.91 | $489.27 | $173.64 | $24,024.90 |
| 3 | $662.91 | $492.74 | $170.18 | $23,532.16 |
| 4 | $662.91 | $496.23 | $166.69 | $23,035.93 |
| 5 | $662.91 | $499.74 | $163.17 | $22,536.19 |
| 6 | $662.91 | $503.28 | $159.63 | $22,032.91 |
| 7 | $662.91 | $506.85 | $156.07 | $21,526.06 |
| 8 | $662.91 | $510.44 | $152.48 | $21,015.63 |
| 9 | $662.91 | $514.05 | $148.86 | $20,501.57 |
| 10 | $662.91 | $517.69 | $145.22 | $19,983.88 |
| 11 | $662.91 | $521.36 | $141.55 | $19,462.52 |
| 12 | $662.91 | $525.05 | $137.86 | $18,937.47 |
| 13 | $662.91 | $528.77 | $134.14 | $18,408.69 |
| 14 | $662.91 | $532.52 | $130.39 | $17,876.17 |
| 15 | $662.91 | $536.29 | $126.62 | $17,339.88 |
| 16 | $662.91 | $540.09 | $122.82 | $16,799.80 |
| 17 | $662.91 | $543.91 | $119.00 | $16,255.88 |
| 18 | $662.91 | $547.77 | $115.15 | $15,708.11 |
| 19 | $662.91 | $551.65 | $111.27 | $15,156.47 |
| 20 | $662.91 | $555.55 | $107.36 | $14,600.91 |
| 21 | $662.91 | $559.49 | $103.42 | $14,041.42 |
| 22 | $662.91 | $563.45 | $99.46 | $13,477.97 |
| 23 | $662.91 | $567.44 | $95.47 | $12,910.52 |
| 24 | $662.91 | $571.46 | $91.45 | $12,339.06 |
| 25 | $662.91 | $575.51 | $87.40 | $11,763.55 |
| 26 | $662.91 | $579.59 | $83.33 | $11,183.96 |
| 27 | $662.91 | $583.69 | $79.22 | $10,600.27 |
| 28 | $662.91 | $587.83 | $75.09 | $10,012.44 |
| 29 | $662.91 | $591.99 | $70.92 | $9,420.45 |
| 30 | $662.91 | $596.19 | $66.73 | $8,824.26 |
| 31 | $662.91 | $600.41 | $62.51 | $8,223.85 |
| 32 | $662.91 | $604.66 | $58.25 | $7,619.19 |
| 33 | $662.91 | $608.94 | $53.97 | $7,010.25 |
| 34 | $662.91 | $613.26 | $49.66 | $6,396.99 |
| 35 | $662.91 | $617.60 | $45.31 | $5,779.39 |
| 36 | $662.91 | $621.98 | $40.94 | $5,157.41 |
| 37 | $662.91 | $626.38 | $36.53 | $4,531.03 |
| 38 | $662.91 | $630.82 | $32.09 | $3,900.21 |
| 39 | $662.91 | $635.29 | $27.63 | $3,264.93 |
| 40 | $662.91 | $639.79 | $23.13 | $2,625.14 |
| 41 | $662.91 | $644.32 | $18.59 | $1,980.82 |
| 42 | $662.91 | $648.88 | $14.03 | $1,331.94 |
| 43 | $662.91 | $653.48 | $9.43 | $678.46 |
| 44 | $662.91 | $658.11 | $4.81 | $20.35 |
| 45 | $20.50 | $20.35 | $0.14 | $0.00 |
How it works
We amortize the loan twice — once with the standard payment, once with the standard payment plus your extra — and compare the totals.
Frequently asked questions
Are extra payments always worth it?
Mathematically yes — every extra dollar reduces the principal and saves future interest. But check whether your loan has a prepayment penalty and weigh higher-return alternatives like 401(k) matching.
Where should I direct extra payments?
Confirm with your lender that extra funds are applied to principal, not stored as future payments.
Lump sum vs. monthly extra?
A lump sum applied today saves more interest than the same dollar amount spread over a year, because the principal drops sooner.
Does this hurt my credit?
No — paying down a loan early generally helps your credit because it lowers your debt utilization.
Can I refinance instead?
Sometimes refinancing to a shorter term saves even more. Use our refinance calculator to compare.