What does PITI stand for?

PITI stands for Principal, Interest, Taxes, and Insurance. It represents the four standard components of a comprehensive monthly mortgage payment.

Should I choose a 15-year or 30-year term?

A 15-year term generally secures a lower interest rate and builds equity faster, but requires higher monthly installments. A 30-year term offers lower monthly payments but results in significantly more total interest paid over the life of the loan.

What is Private Mortgage Insurance (PMI)?

PMI is a lender insurance fee required if your down payment is less than 20% of the home's value. It protects the lender in case you default on payments.

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Mortgage Calculator

Estimate your monthly home mortgage payments. Enter home value, down payment, loan term, and interest rate to see the principal, interest, taxes, and amortization values.

Interactive Mortgage Calculator Workspace

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Home Value ($)

Down Payment (%)

Interest Rate (%)

Loan Term (Years)

Calculation Summary

Total Monthly Payment$2,522.62incl. Tax & Insurance

Principal & Interest$2,022.62monthly base

Down Payment Amount$80,00020% of home value

Total Interest Paid$408,142over loan lifetime

Mathematical Formula & Variables

Equation ModelM = P * [r(1+r)^n] / [(1+r)^n - 1]

The standard fixed-rate mortgage equation calculates the fixed monthly installment needed to pay off the loan balance entirely over its term duration.

Variable Definitions

Symbol	Description
M	Total monthly payment amount
P	Principal loan balance (purchase price minus down payment)
r	Monthly interest rate (annual interest rate divided by 12)
n	Total number of monthly payments (loan term in years multiplied by 12)

How to Use the Mortgage Calculator

Enter the Purchase Price or Home Value of the property.
Specify your Down Payment amount (either in cash or as a percentage of the purchase value).
Input the Loan Term (typically 15 or 30 years for fixed-rate mortgages).
Type in the anticipated Annual Interest Rate.
Optionally input annual property taxes, home insurance, and HOA fees to calculate the complete PITI (Principal, Interest, Taxes, Insurance) payment structure.

Practical Example Calculation

Scenario Context: Calculating a fixed 30-year mortgage for a $400,000 home with a 20% down payment ($80,000) at an annual interest rate of 6.5%.

Step 1: Calculate Principal (P): $400,000 - $80,000 = $320,000.

Step 2: Calculate Monthly Rate (r): 6.5% / 100 / 12 = 0.0054167.

Step 3: Calculate Total Payments (n): 30 * 12 = 360 payments.

Step 4: Apply formula: M = $320,000 * [0.0054167 * (1.0054167)^360] / [(1.0054167)^360 - 1].

Step 5: Solve: M = $320,000 * [0.03783] / [5.983] = $2,022.62.

Your base monthly Principal and Interest payment would be $2,022.62.

Frequently Asked Questions

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