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PITI Calculator

Mortgage Payment Calculator

Estimate your complete monthly housing cost including principal, interest, taxes, and insurance.

⚠️ Results are estimates for informational purposes only. See Disclaimer

Net Profit
$0.00

Per sale net cashflow

Profit Margin
0.0%

Gross margin ratio

Gross Revenue$2219.79
Total Expenses$280000.00
Principal & Interest$1769.79
Taxes & Insurance$450.00
Loan Principal$280000.00

Cost & Profit Breakdown

Visual Allocation
Principal & Interest$1769.79
Property Tax$350.00
Home Insurance$100.00

Calculator Inputs

Live Recalculation
$350000.00
$20.00
$6.50
$4200.00
$1200.00

Mortgage Calculator Guide: Understanding PITI, PMI, and Your True Monthly Housing Cost

Buying a home is one of the largest financial decisions you'll ever make. A mortgage payment is not just principal and interest — your true monthly housing cost includes property taxes, homeowners insurance, and potentially Private Mortgage Insurance (PMI). Many first-time buyers are surprised to find their actual payment is 25-40% higher than what their P&I calculation suggested.

The Four Components of Your Payment (PITI)

  • Principal: The portion of your payment that reduces your actual loan balance. In the early years of a 30-year mortgage, only ~25-30% of your payment goes toward principal.
  • Interest: The cost of borrowing money from your lender, calculated on the remaining loan balance. Early payments are mostly interest; later payments are mostly principal.
  • Taxes: Property taxes assessed by your local government, divided by 12 and collected monthly into an escrow account by your lender.
  • Insurance: Homeowners insurance to protect the property, also collected monthly. PMI (Private Mortgage Insurance) is added if your down payment is less than 20%.

15-Year vs 30-Year Mortgage: Which is Better?

On a $300,000 loan at 6.5%: a 30-year mortgage has a P&I payment of $1,896/month and costs $382,533 in total interest. A 15-year mortgage has a P&I payment of $2,613/month (+$717/month) but only costs $170,278 in total interest — saving over $212,000. If you can afford the higher payment, a 15-year mortgage is a powerful wealth-building tool.

The Core Mortgage Formula

M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1 ]

Where P is the principal loan amount, i is the monthly interest rate (annual rate ÷ 12), and n is the total number of months. This formula produces a fixed payment that pays off the loan exactly at the end of the term.

How to Lower Your Monthly Mortgage Payment

The most effective strategies: (1) Larger down payment — reduces your principal and eliminates PMI at 20%+. (2) Better credit score — a 760+ score vs a 680 score can save 0.5-1.0% in interest rate, which is thousands per year. (3) Shop multiple lenders — getting 3+ loan quotes is the single best way to ensure you have the most competitive rate available. (4) Buy discount points — each point (1% of loan amount) typically reduces your rate by 0.25%.

Frequently Asked Questions

PITI stands for Principal, Interest, Taxes, and Insurance. It represents your complete monthly housing payment. Principal reduces your loan balance. Interest is the lender's profit for the loan. Taxes are property taxes collected monthly into escrow. Insurance is homeowners insurance, also collected monthly. Most lenders use your PITI payment to assess affordability, typically limiting it to 28% of your gross monthly income.
A larger down payment reduces the total amount you need to borrow (your principal), which directly lowers your P&I payment. Additionally, a down payment of 20% or more eliminates Private Mortgage Insurance (PMI), saving $50–$250/month for most borrowers. On a $350,000 home, increasing your down payment from 10% to 20% saves approximately $100–$150/month in P&I plus eliminates PMI entirely.
PMI is insurance that protects the lender (not you) if you default on your loan. It is required when your down payment is less than 20% of the home price. PMI typically costs 0.5% to 1.5% of the loan amount per year, added to your monthly payment. You can avoid PMI by: (1) Putting 20% or more down. (2) Using a piggyback loan (80-10-10 structure). (3) Waiting until your equity reaches 20% and requesting PMI cancellation (or automatically at 22% equity by law in the US).
A 15-year mortgage has a higher monthly payment (typically 30-40% more) but saves a dramatic amount in total interest. On a $280,000 loan at 6.5%, a 30-year term costs ~$357,000 in total interest; a 15-year term costs ~$152,000 — saving over $200,000. If your budget allows the higher payment, a 15-year mortgage builds equity faster and significantly reduces total cost. If cash flow is tight, choose the 30-year but make extra principal payments when possible.
No. Your Principal and Interest (P&I) payment remains fixed for the life of a fixed-rate mortgage. However, property taxes and home insurance premiums are reassessed periodically and can change annually, which will alter your total monthly PITI payment. Most lenders review escrow accounts annually and adjust your monthly payment accordingly.

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Disclaimer: All results are estimates for informational and educational purposes only. They do not constitute financial, tax, legal, or professional advice. Fees, rates, and tax brackets are subject to change — always verify figures with official platform documentation or a qualified professional before making financial decisions.