Mortgage Calculator (Monthly PITI & Amortization Schedule)
Calculate total monthly home payments including Principal, Interest, Taxes, and Insurance (PITI).
TL;DR: Mortgage Calculator computes your full monthly housing expense (PITI) across 15-year and 30-year loans, factoring in principal, interest, property taxes, home insurance, and PMI.
How Is a Monthly Mortgage Payment (PITI) Calculated?
A monthly mortgage payment (PITI) combines four components: Principal (loan balance repayment), Interest (lender financing charge calculated via standard amortization), Taxes (annual property tax divided by 12), and Insurance (homeowners hazard insurance and PMI divided by 12).
How to Use the Mortgage Calculator
Our Mortgage Calculator performs high-precision mathematical operations directly in your browser with zero latency and complete client-side privacy.
- Enter the Home Purchase Price and your Down Payment amount or percentage.
- Input the Interest Rate (APR) and select Loan Term (30 years, 20 years, or 15 years).
- Enter estimated annual Property Taxes and annual Homeowners Insurance costs.
- Optionally add Private Mortgage Insurance (PMI) and monthly HOA dues.
- Inspect the monthly PITI breakdown, lifetime interest total, and amortization table.
Mathematical Formula & Equations
Where M is total monthly payment, P is principal loan balance, r is monthly interest rate (annual rate / 12), and n is total number of monthly payments (loan term in years × 12).
Calculation Example
For a $400,000 home with 20% down ($80,000), loan principal $P = \$320,000$, interest rate $6.5\%$ ($r = 0.065/12 = 0.005417$), and 30-year term ($n = 360$): $$\text{Monthly Payment } M = 320000 \times \frac{0.005417(1.005417)^{360}}{(1.005417)^{360} - 1} = \$2,022.62$$
100% Client-Side Privacy & Data Security
All calculations, amortization schedules, variables, and sensitive numerical datasets execute 100% locally in your web browser memory. Your financial, medical, and personal values are never transmitted, logged, or uploaded to any external server.
Frequently Asked Questions
- PITI stands for Principal, Interest, Taxes, and Insurance—the four core elements that constitute a borrower's total monthly housing payment.
- Making a down payment of at least 20% on a conventional home loan eliminates the requirement for Private Mortgage Insurance, saving $100 to $300 monthly.
- A 15-year mortgage has higher monthly payments but lower interest rates, saving over 60% in total lifetime interest compared to a 30-year loan.
- Lenders typically collect 1/12th of your estimated annual property taxes each month into an escrow account to pay municipal taxes on your behalf.
- Yes. Adjust down payments and insurance rates to model conventional (3%–20% down), FHA (3.5% down + MIP), or VA (0% down) loans.
- In addition to principal and interest, lenders escrow annual property taxes, hazard insurance, and Private Mortgage Insurance (PMI if down payment is under 20%), which are divided by 12 and added to your monthly bill.
- A 15-year mortgage features higher monthly payments but significantly lower interest rates and saves tens of thousands in lifetime interest compared to a 30-year term.
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<iframe src="https://nexlove.org/embed/mortgage-calculator.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="Mortgage Calculator — NexLove.org" loading="lazy"></iframe>