Mortgage Calculator
About Mortgage Calculator
How to Use
- Enter Home Price: Input the total purchase price of the property
- Set Down Payment: Enter the amount you'll pay upfront (typically 20% to avoid PMI)
- Choose Loan Term: Select the duration of your mortgage (15, 20, or 30 years)
- Input Interest Rate: Enter the annual interest rate offered by your lender
- Add Additional Costs: Include property taxes, insurance, HOA fees, and PMI if applicable
- Calculate: Click "Calculate Payment" to see your monthly payment and amortization schedule
Key Features
- Complete PITI Calculation: Includes Principal, Interest, Taxes, and Insurance
- PMI Calculation: Automatically includes Private Mortgage Insurance if down payment is less than 20%
- Amortization Schedule: Detailed month-by-month breakdown of payments
- Visual Breakdown: Charts showing principal vs. interest distribution
- Total Cost Analysis: See the complete cost of your loan over its lifetime
- Flexible Terms: Support for 10, 15, 20, 25, and 30-year mortgages
Mortgage Formula & Facts
The Mortgage Payment Formula:
• M = P[r(1 + r)^n]/[(1 + r)^n - 1]
• M = Monthly payment amount
• P = Principal loan amount
• r = Monthly interest rate (annual rate / 12)
• n = Total number of payments (years × 12)
PITI Components:
• Principal: Amount borrowed that goes toward loan balance
• Interest: Cost of borrowing, calculated on remaining balance
• Taxes: Property taxes, typically 1-2% of home value annually
• Insurance: Homeowner's insurance to protect the property
• PMI: Required if down payment is less than 20%
• HOA: Homeowner's Association fees (if applicable)
Mortgage Examples:
• $300,000 loan at 6.5% for 30 years = $1,896/month (P&I only)
• Same loan for 15 years = $2,613/month (saves $383,000 in interest)
• With 20% down, avoid PMI (saves ~$150-200/month)
• Every 1% rate increase adds ~$200/month on $300k loan
• Early in loan, ~80% of payment goes to interest
• By end of loan, ~80% of payment goes to principal
Tips for Getting the Best Mortgage
- Improve Credit Score: Higher scores (740+) qualify for better interest rates
- Save 20% Down: Avoid PMI and reduce monthly payments significantly
- Compare Lenders: Shop around with at least 3-5 different lenders
- Consider Shorter Terms: 15-year mortgages save thousands in interest
- Lock Your Rate: Secure your rate when it's favorable to avoid increases
- Budget for All Costs: Remember taxes, insurance, maintenance, and repairs
- Get Pre-Approved: Strengthens your offer and clarifies your budget
- Make Extra Payments: Even small additional payments significantly reduce interest