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AMORTIZATION SCHEDULE

Amortization calculator

Build a full amortization schedule for any fixed-rate loan and see how extra monthly or one-time payments change your payoff date and total interest.

Last verified: Methodology

Your details

01Loan

02Extra payments

1 = your first payment.

Interest saved

$103,450

paid off 6 years 11 months sooner, in Jan 2050

Paid off sooner by
6 years 11 months
Payoff date
Jan 2050
Payoff date without extra
Dec 2056
Monthly payment (P&I)
$1,896.20
Total interest
$279,187
Interest without extra
$382,637
Extra principal paid
$55,200
Total paid
$579,187
  • Extra payments are assumed to go entirely to principal. Ask your servicer how to mark them; some loans charge a prepayment penalty.

Interest saved: $103,450 paid off 6 years 11 months sooner, in Jan 2050

Without vs with extra payments
LineScheduledWith extra
Monthly payment (P&I)$1,896$1,896
Extra principal paid$0$55,200
Total interest$382,637$279,187
Total paid$682,637$579,187
Interest saved$0$103,450
Total interest, scheduled vs with extra
  • Interest on schedule$382,637
  • Interest with extra payments$279,187
  • Interest saved$103,450

Schedule by year

Every loan year until the balance reaches $0 in Jan 2050.

YearThroughInterestPrincipalOf which extraBalance
1Dec 2027$19,328$5,826$2,400$294,174
2Dec 2028$18,938$6,216$2,400$287,958
3Dec 2029$18,522$6,632$2,400$281,326
4Dec 2030$18,078$7,077$2,400$274,249
5Dec 2031$17,604$7,551$2,400$266,699
6Dec 2032$17,098$8,056$2,400$258,642
7Dec 2033$16,559$8,596$2,400$250,047
8Dec 2034$15,983$9,171$2,400$240,875
9Dec 2035$15,369$9,786$2,400$231,090
10Dec 2036$14,713$10,441$2,400$220,649
11Dec 2037$14,014$11,140$2,400$209,508
12Dec 2038$13,268$11,886$2,400$197,622
13Dec 2039$12,472$12,682$2,400$184,940
14Dec 2040$11,623$13,532$2,400$171,408
15Dec 2041$10,716$14,438$2,400$156,970
16Dec 2042$9,749$15,405$2,400$141,565
17Dec 2043$8,718$16,437$2,400$125,128
18Dec 2044$7,617$17,537$2,400$107,591
19Dec 2045$6,442$18,712$2,400$88,879
20Dec 2046$5,189$19,965$2,400$68,914
21Dec 2047$3,852$21,302$2,400$47,612
22Dec 2048$2,426$22,729$2,400$24,883
23Dec 2049$903$24,251$2,400$632
24Jan 2050$3$632$0$0

Monthly schedule (first 60 payments)

Later years are summarized in the yearly table.

#MonthPaymentInterestPrincipalExtraBalance
1Jan 2027$2,096.20$1,625.00$271.20$200.00$299,528.80
2Feb 2027$2,096.20$1,622.45$273.75$200.00$299,055.05
3Mar 2027$2,096.20$1,619.88$276.32$200.00$298,578.73
4Apr 2027$2,096.20$1,617.30$278.90$200.00$298,099.83
5May 2027$2,096.20$1,614.71$281.49$200.00$297,618.34
6Jun 2027$2,096.20$1,612.10$284.10$200.00$297,134.24
7Jul 2027$2,096.20$1,609.48$286.72$200.00$296,647.52
8Aug 2027$2,096.20$1,606.84$289.36$200.00$296,158.16
9Sep 2027$2,096.20$1,604.19$292.01$200.00$295,666.15
10Oct 2027$2,096.20$1,601.52$294.68$200.00$295,171.47
11Nov 2027$2,096.20$1,598.85$297.35$200.00$294,674.12
12Dec 2027$2,096.20$1,596.15$300.05$200.00$294,174.07
13Jan 2028$2,096.20$1,593.44$302.76$200.00$293,671.31
14Feb 2028$2,096.20$1,590.72$305.48$200.00$293,165.83
15Mar 2028$2,096.20$1,587.98$308.22$200.00$292,657.61
16Apr 2028$2,096.20$1,585.23$310.97$200.00$292,146.64
17May 2028$2,096.20$1,582.46$313.74$200.00$291,632.90
18Jun 2028$2,096.20$1,579.68$316.52$200.00$291,116.38
19Jul 2028$2,096.20$1,576.88$319.32$200.00$290,597.06
20Aug 2028$2,096.20$1,574.07$322.13$200.00$290,074.93
21Sep 2028$2,096.20$1,571.24$324.96$200.00$289,549.97
22Oct 2028$2,096.20$1,568.40$327.80$200.00$289,022.17
23Nov 2028$2,096.20$1,565.54$330.66$200.00$288,491.51
24Dec 2028$2,096.20$1,562.66$333.54$200.00$287,957.97
25Jan 2029$2,096.20$1,559.77$336.43$200.00$287,421.54
26Feb 2029$2,096.20$1,556.87$339.33$200.00$286,882.21
27Mar 2029$2,096.20$1,553.95$342.25$200.00$286,339.96
28Apr 2029$2,096.20$1,551.01$345.19$200.00$285,794.77
29May 2029$2,096.20$1,548.06$348.14$200.00$285,246.63
30Jun 2029$2,096.20$1,545.09$351.11$200.00$284,695.52
31Jul 2029$2,096.20$1,542.10$354.10$200.00$284,141.42
32Aug 2029$2,096.20$1,539.10$357.10$200.00$283,584.32
33Sep 2029$2,096.20$1,536.08$360.12$200.00$283,024.20
34Oct 2029$2,096.20$1,533.05$363.15$200.00$282,461.05
35Nov 2029$2,096.20$1,530.00$366.20$200.00$281,894.85
36Dec 2029$2,096.20$1,526.93$369.27$200.00$281,325.58
37Jan 2030$2,096.20$1,523.85$372.35$200.00$280,753.23
38Feb 2030$2,096.20$1,520.75$375.45$200.00$280,177.78
39Mar 2030$2,096.20$1,517.63$378.57$200.00$279,599.21
40Apr 2030$2,096.20$1,514.50$381.70$200.00$279,017.51
41May 2030$2,096.20$1,511.34$384.86$200.00$278,432.65
42Jun 2030$2,096.20$1,508.18$388.02$200.00$277,844.63
43Jul 2030$2,096.20$1,504.99$391.21$200.00$277,253.42
44Aug 2030$2,096.20$1,501.79$394.41$200.00$276,659.01
45Sep 2030$2,096.20$1,498.57$397.63$200.00$276,061.38
46Oct 2030$2,096.20$1,495.33$400.87$200.00$275,460.51
47Nov 2030$2,096.20$1,492.08$404.12$200.00$274,856.39
48Dec 2030$2,096.20$1,488.81$407.39$200.00$274,249.00
49Jan 2031$2,096.20$1,485.52$410.68$200.00$273,638.32
50Feb 2031$2,096.20$1,482.21$413.99$200.00$273,024.33
51Mar 2031$2,096.20$1,478.88$417.32$200.00$272,407.01
52Apr 2031$2,096.20$1,475.54$420.66$200.00$271,786.35
53May 2031$2,096.20$1,472.18$424.02$200.00$271,162.33
54Jun 2031$2,096.20$1,468.80$427.40$200.00$270,534.93
55Jul 2031$2,096.20$1,465.40$430.80$200.00$269,904.13
56Aug 2031$2,096.20$1,461.98$434.22$200.00$269,269.91
57Sep 2031$2,096.20$1,458.55$437.65$200.00$268,632.26
58Oct 2031$2,096.20$1,455.09$441.11$200.00$267,991.15
59Nov 2031$2,096.20$1,451.62$444.58$200.00$267,346.57
60Dec 2031$2,096.20$1,448.13$448.07$200.00$266,698.50

$103,450

paid off 6 years 11 months sooner, in Jan 2050

How it's calculated

An amortization schedule lists every payment on a fixed-rate loan and splits each one into interest and principal. Interest is charged on the balance you still owe, so early payments are mostly interest and later payments are mostly principal.CFPB

Extra payments go straight to principal. That lowers the balance the next month's interest is charged on, so the loan is paid off sooner and the total interest falls. The calculator runs the schedule twice, once as scheduled and once with your extra payments, and compares them.

The formula

  1. Monthly payment = L × r ÷ (1 − (1 + r)−n), where L is the loan amount, r the annual rate ÷ 12 and n the number of months. At 0% it is L ÷ n.
  2. Each month: interest = balance × annual rate ÷ 12, rounded to the cent; principal = payment − interest; new balance = balance − principal − any extra payment.
  3. Last payment = whatever balance is left plus that month's interest, so the loan ends at exactly $0.
  4. Interest saved = total interest on the scheduled loan − total interest with extra payments.

This month-by-month method is the one HUD publishes for its mortgage insurance premium calculation, and our tests reproduce HUD's example balances to the cent.HUD The Federal Reserve's refinancing guide gives a similar illustration: adding $50 a month to a $200,000, 30-year loan at 6% cuts about three years and more than $27,000 of interest.Federal Reserve Board

Worked example

A $300,000 loan at 6.5% for 30 years has a payment of $1,896.20 and costs $382,637 in interest if you pay it as scheduled.

Adding $200 a month saves $103,450 and finishes the loan 6 years 11 months early.

$300,000 at 6.5%, $200 extra a monthAMORTIZATION / 30 YR
LineScheduledWith extra
Monthly payment (P&I)$1,896$1,896
Extra principal paid$0$55,200
Total interest$382,637$279,187
Total paid$682,637$579,187
Interest saved$0$103,450

A single $10,000 payment with payment 12 instead saves $50,230.

Assumptions and limitations

  • Fixed rate, fixed payment. Adjustable-rate loans recalculate the payment when the rate changes.
  • Extra payments go to principal the month you make them. Servicers can apply extra money differently (for example, to next month's payment), so ask them to apply it to principal.
  • No prepayment penalty. Some loans charge one for paying early; check your Loan Estimate or note.
  • Principal and interest only. Taxes, insurance and mortgage insurance in escrow are not part of the schedule; the mortgage calculator adds them.
  • The monthly table shows the first 60 payments; the yearly table covers the whole loan.
FAQ

Questions people ask

What is an amortization schedule?

It is a table of every payment on a loan, showing how much of each one pays interest, how much reduces the principal, and the balance left afterward. On a fixed-rate loan the payment stays the same, but the split shifts over time: interest is largest at the start, when you owe the most, and principal takes over as the balance falls.

How much do extra payments save?

Every extra dollar paid toward principal stops earning interest for the rest of the loan, so savings are biggest when you pay extra early and on loans with higher rates and longer terms. Enter a monthly extra amount, a one-time payment, or both, and the calculator compares total interest and the payoff date with and without them.

Is it better to pay extra every month or make one lump sum?

For the same total dollars, money paid sooner saves more interest, because it lowers the balance for more months. A lump sum early in the loan beats the same amount spread over later years, while a steady monthly extra is easier to budget. Try both in the calculator by setting the one-time payment and its payment number.

Why is my last payment different from the others?

The monthly payment is rounded to the cent, and interest is rounded each month, so the balance never lands exactly on zero with a full payment. The final payment is adjusted to whatever principal is left plus that month's interest. With extra payments, the last payment is usually much smaller than a regular one.

Will paying extra lower my monthly payment?

Not on most fixed-rate loans. Extra principal shortens the loan instead: the required monthly payment stays the same until the balance is paid off, and the last payments simply disappear. If what you need is a lower monthly payment rather than an earlier payoff date, ask your servicer which options your loan allows before you send extra money.

Do extra payments go to principal automatically?

Not always. Some servicers hold extra money or apply it to the next scheduled payment. Mark the payment as additional principal, or use the principal-only option in your servicer's online account, and check your statement afterward. Also check whether your loan has a prepayment penalty before paying a large amount early.

Sources

  1. CFPBWhat is amortization and how could it affect my loan? · retrieved 2026-10-16
  2. CFPBLoan Estimate sample H-24(B), fixed rate loan (Regulation Z Appendix H) · retrieved 2026-10-16
  3. Federal Reserve BoardA Consumer's Guide to Mortgage Refinancings · retrieved 2026-10-16
  4. HUDMonthly (Periodic) Mortgage Insurance Premium Calculation · retrieved 2026-10-16
  5. IRSPublication 15-T (2026), Federal Income Tax Withholding Methods · retrieved 2026-10-16
  6. IRSPublication 15 (2026), (Circular E), Employer's Tax Guide · retrieved 2026-10-16
  7. IRSRev. Proc. 2025-32: 2026 inflation-adjusted tax items · retrieved 2026-10-16
  8. IRSForm W-4 (2026), Employee's Withholding Certificate · retrieved 2026-10-16
  9. IRSPublication 505 (2026), Tax Withholding and Estimated Tax · retrieved 2026-10-16
  10. IRSForm 1040-ES (2026), Estimated Tax for Individuals · retrieved 2026-10-16
  11. IRSSchedule 1-A (Form 1040) 2026, Additional Deductions (early-release draft) · retrieved 2026-10-16
  12. IRSSchedule 8812 (Form 1040) 2026, Credits for Qualifying Children and Other Dependents (early-release draft) · retrieved 2026-10-16
  13. IRSWorking Families Tax Cuts: Individuals and workers (tips, overtime, seniors, car loan interest) · retrieved 2026-10-16
  14. IRSWorking Families Tax Cuts provisions (charitable deduction for non-itemizers, Section 70424) · retrieved 2026-10-16
  15. IRSChild Tax Credit · retrieved 2026-10-16
  16. IRSIR-2025-111: 401(k) limit increases to $24,500 for 2026 · retrieved 2026-10-16
  17. IRSRev. Proc. 2025-19: 2026 HSA limits · retrieved 2026-10-16

Last verified: CalcBloc Editorial Team