Payment Breakdown Tool · Free

MortgageDaily CalculatorAmortization Schedule Calculator

See every payment broken down by principal and interest — month by month. Find out how extra payments can save you years and tens of thousands.

70–80% goes to interest year 1
$30K+ saved with $100/mo extra
Download full CSV
Chart included
Amortization Schedule Calculator
Mortgage Amortization Calculator
Extra payments (applied to principal)
Monthly P&I payment
$0.00
Total interest (base)
No extra payments.
Total interest (with extras)
Time saved
How much the loan term shrinks.
Jump to:
Amortization Schedule
#DatePaymentExtraPrincipalInterestBalanceEquity
Estimates only. Exact amortization may vary by lender rounding rules.
~$430K
Total Interest on $350K at 6.29% / 30yr
4–5 yrs
Saved with $100/mo Extra Principal
78%
Of Payment = Interest in Year 1
How to Use

Reading Your Amortization Schedule

Year 1 — Where Your Payment Goes
🔵 Interest: 78%🟡 Principal: 22%
Year 15 — Where Your Payment Goes
🔵 Interest: 52%🟡 Principal: 48%
Year 28 — Where Your Payment Goes
🔵 Interest: 15%🟡 Principal: 85%
1
Enter loan details — amount, interest rate, and term.
2
Set extra payments — monthly, annual, or one-time to see real savings.
3
Use "Jump to" — check your balance and equity at any future month.
4
Download CSV — export the full schedule for your records or spreadsheet.
Key Concepts

What You Need to Understand

📉
Front-Loaded Interest
In year 1 of a 30-year mortgage, ~78% of each payment goes to interest. This reverses gradually as your principal shrinks.
Power of Extra Payments
Adding $100/month extra can shave 4–5 years off a 30-year loan and save $30,000+. The calculator shows your exact numbers.
⏱️
15-Year vs. 30-Year
A 15-year mortgage saves $100K–$200K+ in total interest vs 30-year. Monthly payment is higher but the total cost is far lower.
⚠️
Refinance Timing Warning
If you're 10+ years into your loan, most payments go to principal. Refinancing into a new 30-year restarts the front-loaded interest clock.
🏠
Equity Tracking
Enter your home value to see equity grow month-by-month. Once you hit 20% equity, you can request PMI removal from conventional lenders.
FAQ

Amortization Schedule FAQ

Why does so little of my payment go to principal at first?
Mortgage interest is calculated on your remaining balance. Early on that balance is high, so most of your payment covers interest. As you pay down principal, a larger share of each payment reduces the balance — this is how amortization works.
How do extra payments affect amortization?
Extra payments go directly to principal, which reduces your balance faster. Less balance means less interest on every future payment — and an earlier payoff date. Even $50/month extra makes a meaningful difference over 30 years. Use the extra payment fields to see your exact savings.
Is a 15-year or 30-year mortgage better?
A 15-year saves substantial interest but requires higher monthly payments. If you can comfortably afford the 15-year payment, it's the better financial choice. If not, a 30-year with extra payments is a good middle ground. Compare both in the calculator above.
How much total interest will I pay on my loan?
On a $350,000 mortgage at 6.29% for 30 years, you'll pay approximately $430,000 in total interest — more than the original loan. The amortization schedule shows your exact total. That figure illustrates why extra payments and shorter terms are so valuable.
Can I download my amortization schedule?
Yes. Click "Download CSV" to export the full schedule as a spreadsheet. It includes month number, date, payment, principal, interest, remaining balance, and equity columns — ready for Excel or Google Sheets.
Where can I learn more about mortgage amortization?
For official guidance on mortgages and home loans, visit the Consumer Financial Protection Bureau (CFPB) — a trusted U.S. government resource for homebuyers. You can also explore HUD's home buying resources for additional guidance on mortgages, down payments, and loan terms.

What does amortization mean?

Amortization is the process of paying off a loan in a series of fixed payments. Each instalment is directed toward either the loan principal or accrued interest.

A mortgage loan starts with a large portion of the payment going towards interest, with a much smaller amount applied to the loan principal.

You can think of this as a type of insurance policy for the lender. They want to get their money back as quickly as possible.

Over time, this allocation switches, and the principal will gradually begin to receive more and more each month.

While the split changes over the life of the loan, the monthly payments remain constant.

What is an Amortization Schedule?

Amortization gives you better insight on your payment distribution.

An amortization schedule breaks this concept down even further. The schedule can be referenced to further understand how your loan disbursement will fluctuate over time.

Here’s an overview of what an amortization schedule will provide you with:

  • Scheduled Payments: each monthly payment is individually listed for the span of the loan.
  • Allocation: how much of the total payment has been put toward the principal loan versus interest at a specified date.
  • Remaining Principal: the total amount owed on the principal currently or at a future date.
  • Interest Expenses: how much interest you will have paid over the life of the loan or at a specific date.
  • Extra Payments: how an extra payment or recurring extra payments will affect the total interest paid and decrease the loan term.
  • Equity: an amortization calculator can indicate how much equity you will have in the home at any given time during the loan period.

Amortization Schedules and Extra Payments

The information provided by an amortization schedule makes it much easier to look at the loan from a bird’s eye view and evaluate your options.

You can use the calculator to determine how much you’ll end up saving in interest by paying off the debt early or making extra payments.

An extra payment can be made with a larger sum of money, annually or semi-annually, for example. Or you can add a little extra to each mortgage payment.

It’s important to double and triple check that this additional money is going directly toward the loan principal and not towards interest.

The calculator will then show you how those extra payments will cut time off of the loan and how much money could be saved on interest. You’d be surprised how a few extra payments can significantly reduce each.

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