PITI vs principal and interest
By Jude Wallis
Principal and interest is what the loan costs: $1,580.17 a month on $250,000 at 6.5 percent over 30 years. PITI adds the two escrow items, $500 of property tax and $150 of insurance, for a housing payment of $2,230.17. Lenders qualify you on the second number.
| PITI | Principal and interest | |
|---|---|---|
| What it includes | The loan payment plus escrowed property tax and hazard insurance. | The loan payment only. |
| On this loan | $2,230.17 a month. | $1,580.17 a month. |
| Who receives the money | The lender, then the tax authority and the insurer from escrow. | The lender alone. |
| Does it change over time | Yes. A tax reassessment or a premium rise moves the $500 and the $150. | No, on a fixed rate. The payment is set at closing. |
| What underwriting uses | This one, plus HOA dues, against gross income. | Not this one, which is why an affordability estimate built on it comes out too high. |
| What is still missing | Mortgage insurance and HOA fees, which some lenders fold in as PITIA. | Everything except the debt itself. |
On this page
One number is a loan, the other is a house
The $1,580.17 is pure amortisation: it is the payment that drives $250,000 to zero across 360 months at 6.5 percent, and on a fixed rate it never moves. The other two lines are the cost of owning the building rather than the cost of borrowing for it. Property tax at $6,000 a year is $500 a month, and insurance at $1,800 a year is $150.
That is why they behave differently. Refinancing changes the first line. A reassessment or a new insurance quote changes the second and third, and neither has anything to do with the mortgage.
Underwriting reads PITI, so a budget should too
A front-end ratio compares housing cost to gross income, and the housing cost in that ratio is $2,230.17, not $1,580.17. Budget on the smaller number and the $500 of tax and $150 of insurance arrive anyway. How PITI works sets out the full ratio, and front-end against back-end DTI shows the second test that runs alongside it.
Escrow is the mechanism that collects the extra. The servicer holds the monthly instalments and pays the bills when they fall due, then trues up the account once a year. The escrow calculator shows the monthly amount for any tax and premium pair, and escrow explains the account itself.
Which number to quote where
Quote principal and interest when comparing loans, because it isolates the thing the rate actually changes. Quote PITI when working out whether a house is affordable, because it is the amount that leaves the account. The PITI calculator prints both lines together for exactly that reason, and the loan payment calculator isolates the borrowing half. This is educational material, not financial advice.
Worked examples
A \$250,000 loan with \$6,000 of tax and \$1,800 of insurance
A $250,000 mortgage at 6.5 percent over 30 years carries $6,000 of annual property tax and $1,800 of annual insurance. What is the full monthly payment?
- Amortise $250,000 over 360 months at 6.5 percent: principal and interest is $1,580.17.
- Divide the annual tax by 12: $500 a month. Divide the premium by 12: $150 a month.
- Add the three: 1,580.17 plus 500 plus 150 is $2,230.17.
PITI is $2,230.17 a month, of which only $1,580.17 goes to the loan.
The same loan in a higher-tax county
Same $250,000 loan and rate, but property tax is $9,000 a year and insurance is $2,400. What moves?
- Principal and interest does not move at all: still $1,580.17.
- Tax becomes $750 a month and insurance $200, so PITI is $2,530.17.
PITI rises to $2,530.17 on an unchanged loan. The mortgage was never the thing that changed.
Common questions
Does PITI include mortgage insurance?
Not in the four letters. Lenders that include it and HOA dues usually write PITIA instead.
Can I pay tax and insurance myself?
Sometimes, with enough equity. The bills still arrive; escrow only changes who holds the money in the meantime.
Why did my payment rise on a fixed-rate mortgage?
Almost always escrow. The $1,580.17 is fixed, but the tax and insurance lines are re-estimated each year.
Is this financial advice?
No. It is educational material about what a mortgage payment contains.
Keep reading
This page is educational material, not financial advice. The figures come from the formula shown and assume the inputs you enter hold for the whole term. Your own rate, fees, taxes and timing will differ, so treat the output as arithmetic to check a decision against, not as a recommendation.