Your Monthly Mortgage Payment — P&I, PITI, and Total Cost
Estimate your monthly payment and total cost of home ownership. Add property tax, insurance, and PMI for full PITI.
Why This Matters for Your Finances
Why: Knowing your monthly mortgage payment helps you budget and compare affordability. Lenders typically cap housing at 28% of gross income. PITI (Principal, Interest, Taxes, Insurance) is your true monthly cost—don't forget PMI if you put less than 20% down.
How: Enter home price, down payment (amount or %), interest rate, and loan term. Add property tax, insurance, PMI, and HOA for full PITI. Results show monthly payment, total interest, and loan-to-value ratio.
- ●P&I = principal and interest. PITI adds taxes, insurance, PMI.
- ●28% front-end DTI: housing should not exceed 28% of gross income.
- ●20% down avoids PMI on conventional loans.
- ●1% rate difference can add hundreds per month and tens of thousands over the loan.
📋 Quick Examples — Click to Load
Payment Breakdown
Total Cost Over Time
PITI Composition
Rate Impact
For educational purposes only — not financial advice. Consult a qualified advisor before making decisions.
💡 Money Facts
Median monthly payment in 2024 was about $2,213
— Freddie Mac
1% difference in rate can mean ~$200/mo more on a $300K loan
— Bankrate
28% DTI rule: $6K income → max ~$1,680 housing payment
— CFPB
20% down on $400K = $80K; avoids PMI (~0.5–1% of loan/year)
— NAR
15yr loans have ~40% higher payment but ~50% less total interest
— Freddie Mac
FHA allows 3.5% down but requires mortgage insurance for life
— CFPB
A mortgage calculator estimates your monthly payment (P&I) and total cost of home ownership. The formula M = P × [r(1+r)^n] / [(1+r)^n − 1] produces equal payments that pay off the loan. Add property tax, insurance, and PMI for full PITI. Lenders typically cap housing at 28% of gross income (front-end DTI). Median 30yr payment in 2024 was about $2,213; median home price was $412K.
Sources: Freddie Mac PMMS, NAR, CFPB, Census Bureau.
Key Takeaways
- • P&I = monthly principal and interest. PITI adds taxes, insurance, PMI.
- • 28% front-end DTI: housing payment should not exceed 28% of gross income.
- • 20% down avoids PMI on conventional loans; less than 20% typically requires PMI.
- • 1% rate difference can add hundreds per month and tens of thousands over the life of the loan.
Did You Know?
How Does It Work?
P&I Formula
M = P × [r(1+r)^n] / [(1+r)^n − 1]. P = loan amount, r = monthly rate, n = number of payments.
PITI Components
Add monthly property tax (annual ÷ 12), home insurance (annual ÷ 12), PMI if LTV > 80%, and HOA fees.
Affordability
Front-end: housing / gross income ≤ 28%. Back-end: (housing + debt) / gross income ≤ 36%.
Expert Tips
Loan Term Comparison
| Term | Monthly | Total Interest |
|---|---|---|
| 15yr | Higher | ~50% less |
| 30yr | Lower | ~2x more |
Frequently Asked Questions
How is monthly mortgage payment calculated?
Monthly P&I = P × [r(1+r)^n] / [(1+r)^n − 1], where P = loan amount, r = monthly rate (annual ÷ 12), n = number of payments. Add property tax, insurance, and PMI if applicable for full PITI.
What is PITI?
PITI stands for Principal, Interest, Taxes, and Insurance. It's your total monthly housing payment. Lenders use PITI to calculate debt-to-income ratios (typically 28% front-end, 36% back-end).
How much house can I afford?
A common rule: housing payment (PITI) should not exceed 28% of gross monthly income. With total debt under 36%. For example, $6,000 monthly income suggests roughly $1,680 max PITI for housing.
Fixed vs ARM rates—what's the difference?
Fixed-rate mortgages lock your rate for the full term. ARMs start with a lower rate for 5–10 years, then adjust. Fixed offers predictability; ARM can save money if you sell or refinance before the rate resets.
What is PMI?
Private Mortgage Insurance protects lenders when you put less than 20% down. Typical cost: 0.5–1% of loan amount annually. PMI can be removed once you reach 20% equity (or 78% LTV for conventional).
What are current mortgage rates?
Rates vary by lender, loan type, and credit. As of 2024, median 30-year fixed was around 6.5%. Check Freddie Mac PMMS, Bankrate, or your lender for current rates.
Key Statistics
Official Data Sources
⚠️ Disclaimer: This calculator provides estimates for educational purposes. Actual payments and rates vary by lender. Not financial advice. Consult a mortgage professional for decisions.
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