The Hidden Costs of Homeownership: Understanding PITI
The sticker price on a mortgage — principal and interest — is only part of what you actually pay each month. PITI (Principal, Interest, Taxes, Insurance) is the full picture, and it can be 20%–40% higher than the P&I figure you see in rate advertisements. Always calculate PITI before deciding how much home you can afford.
What PITI Stands For
P — Principal is the portion of your payment that reduces your loan balance. Early in the loan, this is a small fraction of the total payment.
I — Interest is the cost of borrowing, calculated monthly on the remaining balance. For most borrowers in the first several years, interest makes up the majority of the payment.
T — Taxes refers to property taxes. Lenders typically collect these monthly through an escrow account and pay your local tax authority on your behalf. The national average effective property tax rate is roughly 1.1% of assessed value annually, but rates range from under 0.3% in some Hawaiian counties to over 2.5% in parts of New Jersey.
I — Insurance covers two things: homeowner's insurance (required by lenders to protect the collateral) and, if applicable, private mortgage insurance (PMI) for borrowers with less than 20% equity. Homeowner's insurance averages roughly $1,200–$2,000 per year nationally, though coastal and storm-prone areas are significantly higher.
A Real PITI Example
Consider a $400,000 home purchase with 10% down ($40,000), leaving a $360,000 mortgage at 7% over 30 years:
| Component | Monthly Amount |
|---|---|
| Principal + Interest | $2,395 |
| Property taxes (1.1% / 12) | $367 |
| Homeowner's insurance | $150 |
| PMI (~0.8% of loan / 12) | $240 |
| Total PITI | $3,152 |
The P&I figure ($2,395) understates the real cost by $757/month, or about 32%.
Calculate Your True PITI Payment
Factor in taxes, insurance, and PMI to see your full monthly housing cost
The 28% Rule
A long-standing rule of thumb holds that total housing costs (PITI) should not exceed 28% of gross monthly income. At $3,152/month in PITI, you need at least $11,257/month ($135,086/year) in gross income to stay within that guideline.
Lenders also look at a broader measure — your total debt-to-income (DTI) ratio, which includes car payments, student loans, and minimum credit card payments alongside PITI. Most conventional lenders cap total DTI at 43%–45%.
Other Ongoing Costs to Budget For
PITI is the baseline, but homeownership carries additional costs that renters do not face:
- Maintenance and repairs: Budget 1%–2% of home value per year. On a $400,000 home, that is $4,000–$8,000 annually.
- HOA fees: In condos or planned communities, these can range from $100 to over $1,000/month.
- Utilities: Ownership of a larger space typically means higher utility bills than renting.
Key Takeaways
- PITI includes Principal, Interest, Taxes, and Insurance — the true monthly cost of owning.
- On a $400,000 home with 10% down at 7%, PITI can reach $3,152 vs. $2,395 for P&I alone.
- The 28% rule: total housing (PITI) should stay at or below 28% of gross monthly income.
- Budget an additional 1%–2% of home value annually for maintenance and repairs.
What is the 28% rule for housing costs?▾
The 28% rule states that your total monthly housing cost — ideally measured as PITI — should not exceed 28% of your gross monthly income. Lenders often use a broader measure called the debt-to-income (DTI) ratio, which compares all monthly debt payments (including PITI) to gross income, with a common threshold of 43%. Staying under 28% for housing alone leaves room for other debts and savings.
Are property taxes and homeowner's insurance always included in my mortgage payment?▾
Not always. When your lender requires an escrow account — common when your down payment is under 20% — they collect 1/12 of your annual property tax and insurance bills each month along with your P&I payment and pay those bills on your behalf. With sufficient equity, some lenders waive the escrow requirement and allow you to pay taxes and insurance directly.