Reviewed by Financial Editor • Last updated: July 2026
Understanding Your Full Monthly Payment (PITI)
Most calculators only show you Principal and Interest — but your real monthly bill almost always includes four parts, known as PITI:
- Principal — the portion of your payment that reduces your loan balance
- Interest — what you're paying the lender to borrow the money
- Taxes — property taxes, usually collected monthly by your lender and held in escrow
- Insurance — homeowners insurance, and if your down payment is under 20%, PMI (Private Mortgage Insurance) as well
Example: on a $400,000 home with a $360,000 loan (10% down) at 6.5% over 30 years, your Principal & Interest alone is about $2,275/month — but once you add ~$400/month in property taxes, $150/month in insurance, and $150/month in PMI (since the down payment is under 20%), your real monthly payment is closer to $2,975. That's the number that actually matters for budgeting.
Find Out How Much House You Can Afford
Before you start touring houses or applying for FHA or conventional loans, you need to know what your monthly payment will look like. Enter the home price, your expected interest rate, and the loan term (usually 15 or 30 years) to instantly estimate your monthly payment.
A Worked Example
Let's look at a concrete example using a $350,000 home with 20% down ($70,000), giving you a $280,000 loan amount.
- At a 6.5% rate over a 30-Year Term:
- Monthly Principal & Interest: $1,769.79
- Total interest paid over 30 years: $357,125
- Total paid over life of loan: $637,125
15-Year vs 30-Year Mortgage
A 30-year mortgage gives you the lowest possible monthly payment, making it easier to qualify for a larger home. However, a 15-year mortgage will save you tens (or hundreds) of thousands of dollars in interest over the life of the loan. Compare the 30-year example above to the same loan on a 15-year term:
| 30-Year @ 6.5% | 15-Year @ 5.9% | |
|---|---|---|
| Loan amount | $280,000 | $280,000 |
| Monthly P&I | $1,769.79 | $2,347.70 |
| Total interest paid | $357,125 | $142,586 |
| Total paid | $637,125 | $422,586 |
With the 15-year term, you save $214,539 in interest — but your monthly payment is about $578 higher.
How Extra Payments Change Your Payoff Timeline
On that same $280,000 loan at 6.5% over 30 years, adding just $200/month extra toward principal would:
- Pay off the loan in about 22 years and 9 months instead of 30
- Save you roughly $101,283 in total interest
How Much House Can I Afford? (The 28/36 Rule)
Lenders commonly use the 28/36 rule to gauge affordability:
- No more than 28% of your gross monthly income should go toward your total housing payment (PITI)
- No more than 36% of your gross monthly income should go toward all debt payments combined (housing + car loans + credit cards + student loans, etc.)
Example: if you earn $90,000/year ($7,500/month), the 28% rule suggests keeping your total mortgage payment under $2,100/month.
Frequently Asked Questions
Frequently Asked Questions
This calculator provides estimates for informational purposes only and is not a loan offer or guarantee of financing.
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