US Mortgage & Loan Amortization Calculator
Calculate your monthly PITI payments, PMI, interest schedule, and extra payoff acceleration.
Loan & Escrow Parameters
Extra payments save time & interest.
20% down eliminates PMI requirement.
Amortization Schedule (0 Months)
| Month | Principal Paid | Interest Paid | PMI Paid | Total PITI | Remaining Loan Balance |
|---|
Comprehensive US Mortgage & Loan Amortization Guide
Learn how PITI payments, Private Mortgage Insurance (PMI), Loan-to-Value (LTV) ratios, and extra principal payments impact your long-term debt payoff.
What is Loan Amortization?
Loan amortization is the mathematical process of spreading out a loan into a series of equal periodic payments over a fixed timeframe. Each payment you make is split into two distinct parts:
- Interest Payment: The fee charged by the lender for borrowing the capital, calculated on your remaining principal balance.
- Principal Repayment: The portion of your payment that directly reduces the outstanding loan balance.
In the early years of a 30-year fixed-rate US mortgage, the vast majority of your monthly payment goes toward paying interest. As your remaining balance declines over time, a larger portion of each payment shifts toward principal reduction.
Understanding Your Total Monthly Payment (PITI + HOA)
When budgeting for a home in the United States, your monthly housing expense consists of more than just interest and principal. US lenders evaluate home buyers based on PITI:
1. Principal (P)
The money that goes directly toward paying down the actual home loan balance.
2. Interest (I)
The interest charged by your mortgage lender based on your annual percentage rate (APR).
3. Property Tax (T)
Local property taxes collected by your lender and held in an escrow account to pay county/city authorities annual real estate taxes.
4. Hazard Insurance (I)
Homeowners insurance coverage required by US lenders to protect against structural damage or losses.
Note: If your home is located within a planned community or condo association, you may also have HOA (Homeowners Association) dues, which are paid separately or bundled into your total monthly housing cost.
How Private Mortgage Insurance (PMI) Works
Under the US Homeowners Protection Act of 1998, borrowers who put down less than a 20% down payment on a conventional mortgage are required to pay Private Mortgage Insurance (PMI).
PMI protects the lender in case you default on the loan. The cost typically ranges from 0.3% to 1.5% of the initial loan amount annually.
Accelerating Your Debt Payoff with Extra Principal Payments
Making even small extra payments toward your principal balance each month can drastically shorten your loan term and save tens of thousands of dollars in compounding interest.
Because mortgage interest is calculated on your remaining balance each month, reducing the principal balance early lowers the interest charged on every subsequent monthly payment. Use our Extra Monthly Principal Payment input above to simulate how much time and money you can save.
Frequently Asked Questions (FAQ)
What is the difference between a 15-year and a 30-year mortgage?
A 30-year fixed mortgage offers lower, more manageable monthly payments but incurs substantially more total interest over time. A 15-year fixed mortgage has higher monthly payments, but usually comes with a lower interest rate and cuts the total interest paid by more than half.
What is an Escrow Account?
An escrow account is a neutral holding account managed by your mortgage servicer. A portion of your total monthly PITI payment is held in escrow to automatically pay your property taxes and homeowners insurance policies when they come due each year.
Can I export my amortization schedule?
Yes! You can click the Export CSV button above the amortization schedule table at any time to download your complete month-by-month payment ledger for analysis in Microsoft Excel or Google Sheets.