Mortgage Calculator for US Market
Estimate your monthly payment, total interest, and amortization timeline. Includes property taxes, insurance, HOA, PMI, and extra payment scenarios — no sign-up required.
PMI is a simplified estimate; real PMI depends on lender rules, credit, and program details. Extra payments reduce interest and can shorten payoff time.
| Period | Avg rate |
|---|---|
| 2020 (pandemic low) | 2.96% |
| 2021 | 2.96% |
| 2022 | 5.34% |
| 2023 | 6.81% |
| 2024 | 6.72% |
| 2025 (approx.) | 6.50–7.00% |
What is a Mortgage Calculator?
A mortgage calculator is a free online tool that estimates your monthly home loan payment by applying a standard amortization formula to your loan amount, interest rate, and term. Instead of working through the math by hand, an online mortgage calculator does the arithmetic instantly — showing you principal and interest, escrow costs, and total interest paid across the life of the loan.
The InvestingLab.com mortgage payment calculator is designed for US homebuyers and homeowners who want a fast, educational estimate. It includes property taxes, insurance, HOA fees, and PMI — the full PITI payment — so you can see the true monthly cost beyond just principal and interest.
How to Use This Mortgage Payment Calculator
- Enter the home price and down payment — the difference becomes your loan amount. Choose percent or dollar amount for the down payment.
- Set your loan term and interest rate — 30 years at current rates is the most common scenario, but compare 15-year vs 30-year to see the tradeoffs.
- Add taxes, insurance, HOA, and PMI — these are often larger than people expect and push the real monthly payment well above the P&I figure alone.
- Try an extra monthly payment — even $100–$200/month extra can shorten a 30-year loan by several years and save tens of thousands in interest.
- Click Calculate — your estimated payment, total interest, and payoff date appear instantly.
Understanding Mortgage Amortization
This tool also functions as an amortization calculator. Amortization means each fixed monthly payment covers both interest (which decreases over time as the balance falls) and principal (which increases). In the early years of a 30-year mortgage, the vast majority of each payment goes to interest — not equity. This is why extra payments made early have such a large impact on total interest paid.
P&I vs Total Payment
Your principal and interest (P&I) payment is the core amortization payment. But your real monthly obligation — what lenders call PITI — also includes property taxes (T) and insurance (I), plus any HOA fee or PMI. This mortgage estimator shows both figures so there are no surprises.
PMI — Private Mortgage Insurance
PMI is typically required when your down payment is less than 20% of the home price. It protects the lender, not you, and adds to your monthly payment. This calculator uses a simplified PMI model; real PMI rates vary by lender, credit score, and loan type. Many loans allow PMI removal once the loan-to-value ratio reaches 80%.
Methodology & Assumptions
This mortgage calculator uses a standard fixed-rate amortization formula. The monthly principal-and-interest payment is calculated so the loan balance reaches zero at the end of the selected term. Your total monthly payment is then estimated by adding monthly equivalents of property taxes and home insurance, plus any HOA fee you enter. PMI is a simplified estimate based on an annual PMI rate and your starting loan balance.
Extra payments are applied monthly to principal in this model, which typically reduces total interest and shortens payoff time. Interest rate changes, adjustable-rate mortgages (ARM), lender fees, points, escrow shortages, tax deductions, and local variations are not modeled. For consumer mortgage education, see the CFPB mortgage tools. See full methodology →
Frequently Asked Questions
Is this an online mortgage calculator I can trust for exact numbers?
What is the difference between a mortgage calculator and an amortization calculator?
Can this mtg calculator include taxes, insurance, HOA, and PMI?
Does this mortgage estimator account for rate changes?
Is there a reverse mortgage calculator here?
Related Tools
Once you know your mortgage payment, use these tools to complete your financial picture:
