PITI Calculator - Principal, Interest, Taxes & Insurance

Calculate your full monthly housing payment including principal, interest, taxes, insurance, PMI, and HOA, with a built-in affordability check.

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The Payment You Quoted Yourself Is Probably Too Low

Carlos found a house he loved and ran a quick mortgage calculation. A $400,000 loan at 6.5% over 30 years came to about $2,528 a month. He budgeted for that, got pre-approved, and felt ready. Then his lender sent the full estimate. The real payment was $3,310. The extra $782 a month was not a mistake. It was everything his quick calculation left out, and it is the gap that catches thousands of first-time buyers off guard.

What PITI actually covers. PITI stands for the four parts of a real mortgage payment: Principal, Interest, Taxes, and Insurance. Principal and interest pay down the loan itself. Property taxes and homeowners insurance are usually collected by your lender and held in an escrow account, then paid on your behalf when they come due. Most online quotes show only the P and the I, which is why they always look smaller than the bill you actually pay.

The pieces that blow up the budget. Property taxes vary wildly by location, often running 0.5% to 2.5% of a home's value each year. On a $450,000 home, a 1.2% tax rate adds $450 a month before you touch insurance. Homeowners insurance might add another $130 to $250 a month depending on your area and coverage. If you put down less than 20%, private mortgage insurance, or PMI, can tack on $150 to $300 more. Add HOA dues for a condo or planned community and another $200 to $500 a month can disappear before you have paid a cent of principal.

The 28% rule lenders live by. A long-standing guideline says your total PITI should stay at or below 28% of your gross monthly income. If you earn $9,000 a month, that ceiling is $2,520. Carlos's true payment of $3,310 would push him to 37% of a $9,000 income, well past comfortable, even though his principal-and-interest-only number looked fine. This calculator runs that check automatically so you see whether the home fits your income, not just the loan.

Why the full number matters now. Knowing your real PITI before you shop protects you from falling for a house you cannot comfortably afford. It changes which price range you tour, how much you offer, and how big a cushion you keep for repairs and life. The number on the quick quote is a tease. The PITI is the truth, and it is the one your bank account will feel every month for 30 years.

How to Use This PITI Calculator

Enter the loan basics first. Start with your loan amount, interest rate, and term. The loan amount is your purchase price minus your down payment. These three inputs produce the principal and interest portion, the part most quick calculators stop at.

Add property taxes. Enter your annual property tax, or your local tax rate if you know it. Rates vary enormously by state and county, from under 0.5% in some areas to over 2% in others. Check the listing or your county assessor for the actual figure rather than guessing, since this line moves the payment the most.

Include homeowners insurance. Enter your annual premium. If you do not have a quote yet, a rough estimate of 0.3% to 0.6% of the home's value per year gets you in the right range. Coastal and wildfire-prone areas run higher.

Account for PMI and HOA. If your down payment is below 20%, add private mortgage insurance. If the property is a condo or sits in a planned community, add the monthly HOA dues. Both can add hundreds of dollars and are easy to forget when comparing homes.

Check the 28% affordability result. Enter your gross monthly income and the tool shows whether your total PITI stays within the 28% guideline. If it pushes past that line, consider a larger down payment, a less expensive home, or a longer search for lower property taxes. Seeing the percentage helps you shop in a range you can actually sustain.

This calculator provides estimates based on the information you enter. For advice tailored to your situation, consult a qualified financial professional.

Frequently Asked Questions

Common questions about the PITI Calculator - Principal, Interest, Taxes & Insurance

PITI stands for Principal, Interest, Taxes, and Insurance, the 4 core parts of a monthly mortgage payment. Principal and interest pay down the loan, while property taxes and homeowners insurance are usually collected through escrow and paid on your behalf. A quote showing only principal and interest can understate your true payment by $700 or more a month.

Sources & References

Home Price Appreciation Rate

• Historical average (1963-2024): ~3.8% annually
• Varies significantly by location and economic conditions
→Source: Federal Reserve Bank of St. Louis - S&P/Case-Shiller Home Price Index(2024)

Debt-to-Income (DTI) Ratio Guidelines

• Conventional mortgages: Maximum 43-50% DTI
• FHA loans: Maximum 43-57% DTI with compensating factors
• Ideal DTI for approval: Under 36% total, with housing under 28%
→Source: Consumer Financial Protection Bureau(2025)

Private Mortgage Insurance (PMI)

• Required when down payment is less than 20%
• Cost: 0.5% to 1.5% of original loan amount annually
• Can be removed once equity reaches 20-22%
→Source: CFPB - Private Mortgage Insurance(2025)

Home Maintenance Costs

• General rule: 1-4% of home value annually
• Newer homes (0-5 years): ~1% annually
• Older homes (15+ years): 3-4% annually
→Source: Zillow Research - Home Maintenance Guide(2024)

Property Tax Rates

• National average: 0.99% of home value annually
• Range: 0.28% (Hawaii) to 2.23% (New Jersey)
→Source: Tax Foundation - Property Taxes by State(2024)

Rent vs. Buy Rule of Thumb

• Price-to-rent ratio above 20 typically favors renting
• Price-to-rent ratio below 15 typically favors buying
• Break-even point typically occurs after 3-7 years of ownership
→Source: Zillow Research - Rent vs. Buy Methodology(2024)

Note

Real estate markets are highly localized. National averages don't reflect local market conditions. Always research your specific area.

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