Mortgage
What Is an Amortization Schedule?
An amortization schedule is the payment-by-payment map of a loan. It shows each payment, how much goes to interest, how much reduces principal, and what balance remains afterward.
For mortgage borrowers, the schedule makes one surprising fact visible: early payments are often mostly interest, even when the monthly payment never changes.
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Video source: Finance tutorials / real estate math on YouTube
What the table shows
A basic amortization table includes the payment number, payment amount, interest portion, principal portion, and remaining balance.
Escrowed taxes and insurance are usually not part of the amortization schedule because they do not reduce the loan balance.
Why early payments are mostly interest
Interest is calculated on the current unpaid balance. At the start of a 30-year loan, the balance is close to the original loan amount, so the interest charge is high.
As principal is paid down, the interest charge shrinks and more of each fixed payment reduces the balance.
Sample amortization table
You do not need to read 360 rows to understand the pattern. A few checkpoints show how slowly principal can fall in the early years.
| Payment # | Payment | Interest | Principal | Remaining balance |
|---|---|---|---|---|
| 1 | $2,023 | $1,733 | $290 | $319,710 |
| 12 | $2,023 | $1,715 | $308 | $316,435 |
| 60 | $2,023 | $1,603 | $420 | $299,433 |
| 120 | $2,023 | $1,449 | $574 | $271,579 |
How extra payments change the schedule
Extra principal payments reduce the balance earlier than scheduled. Because future interest is based on the balance, extra principal can also reduce total interest.
The impact depends on timing. Extra payments made early generally save more interest than the same extra payments made near the end of the loan.
Common mistakes when reading amortization
Do not confuse principal-and-interest with the total amount drafted from your bank account. Taxes, insurance, mortgage insurance, and HOA dues are separate planning items.
Also remember that an amortization table assumes the rate and payment terms entered are correct. Use the Mortgage Calculator to test scenarios, then compare them with lender documents.
Final thoughts
An amortization schedule turns mortgage math into a timeline. It pairs naturally with how mortgage payments are calculated because it shows what happens after the payment is set.
FAQ
Does every mortgage have an amortization schedule?
Most fully amortizing mortgages do. The schedule may be provided by a lender or generated with a calculator.
Is escrow included in the schedule?
Usually no. Escrow is for taxes and insurance, while amortization tracks principal and interest on the loan.
Why might my lender statement differ slightly?
Rounding, payment timing, fees, escrow changes, and servicing details can create small differences.
What happens if I make one extra payment each year?
Extra principal can shorten the payoff timeline and reduce total interest, depending on your loan rules and timing.
Related tools and guides
Source references
- CFPB mortgage key terms
- Khan Academy amortization explainers
- CFPB mortgage payoff materials
This article is for informational and planning purposes only and is not financial, tax, legal, lending, or real estate advice.