United States · Federal·Updated for 2026·Figures in USD · fixed-rate loans
Amortization Schedule Calculator
Enter a loan amount, rate and term to see every payment split into principal and interest, the balance after each one, and the date of the last payment. Switch between years and months, add an extra payment, or download the schedule as a CSV file.
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Enter the loan amount and rate. Your payment and full schedule appear as you type.
Calculating
Show the mathSee how this was worked outHide
Each month: interest = balance × annual rate ÷ 12, rounded to the cent; principal = payment − interest; the new balance is the old balance less principal and any extra. The last payment clears what is left.
Last reviewed October 19, 2026. The schedule follows the standard fixed-rate method the Consumer Financial Protection Bureau describes.
The first three payments
$320,000 at 6.5% for 30 years has a $2,022.62 payment. The first three months:
Payment
Interest
Principal
Balance after
1
$1,733.33
$289.29
$319,710.71
2
$1,731.77
$290.85
$319,419.86
3
$1,730.19
$292.43
$319,127.43
Each month the interest is a little lower because the balance is lower, so a little more goes to principal. From payment 233, principal is the larger part.
The same loan, year by year
Year
Principal paid
Interest paid
Balance at year end
1
$3,576.76
$20,694.68
$316,423.24
5
$4,635.54
$19,635.90
$299,554.97
10
$6,410.11
$17,861.33
$271,283.24
15
$8,864.02
$15,407.42
$232,188.56
20
$12,257.30
$12,014.14
$178,127.79
25
$16,949.60
$7,321.84
$103,371.61
30
$23,435.67
$833.21
$0
Over 30 years, the interest totals $408,140.64.
Pay it down faster
Any extra goes straight to principal and shortens the schedule. Try an amount in the calculator above, or use the mortgage extra payment calculator to compare monthly, yearly and one-time extras.
A table of every loan payment showing how much goes to interest, how much to principal, and the balance left afterward. Early payments are mostly interest; later ones are mostly principal.
How is each row worked out?
Interest is the balance × the annual rate ÷ 12. The rest of the payment is principal, which reduces the balance. On $320,000 at 6.5%, the first payment of $2,022.62 is $1,733.33 interest and $289.29 principal.
When does more of my payment go to principal than interest?
On a $320,000, 30-year loan at 6.5%, from payment 233, about 20 years in. A lower rate or a shorter term gets there sooner.
Can I download the schedule?
Yes. Use Download CSV above the table to save every payment as a spreadsheet file. It is created in your browser; nothing is sent to us.
Does the schedule include taxes and insurance?
No. It covers principal and interest only. Escrow for property tax and insurance does not reduce the loan balance. Use the mortgage calculator to see the full monthly payment.
