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What Goes Into a Mortgage Payment (PITI Explained)

When a lender quotes a mortgage payment, the number you see is often just principal and interest — but that is rarely what actually leaves a homeowner's bank account each month. Most homeowners also pay property taxes and insurance, and many pay private mortgage insurance (PMI) or homeowners association (HOA) dues on top. The industry shorthand for the core four is PITI: principal, interest, taxes, and insurance. This guide breaks down each piece, explains how escrow ties them together, and works through a realistic example so the gap between the quoted rate and the "true" monthly cost becomes clear.

By the MoneyHackWise Editorial Team · Reviewed for accuracy · 8 min read · Updated June 28, 2026

The four core pieces: PITI

PITI stands for principal, interest, taxes, and insurance — the four components that make up a typical monthly mortgage payment. Principal and interest are the two parts that go to the lender to repay the loan itself. Property taxes go to your local government, and homeowners insurance goes to your insurer; on most loans, the lender collects a monthly portion of both and pays those bills on the borrower's behalf.

Principal is the part of a payment that actually reduces what is owed. As the Consumer Financial Protection Bureau explains, the portion applied to principal reduces the loan balance and builds equity, while the portion applied to interest does neither. Interest is the cost of borrowing, calculated on the outstanding balance. Early in a fixed-rate loan, when the balance is large, most of each payment is interest; over time the split shifts toward principal, even though the combined principal-and-interest figure stays the same every month.

Because taxes and insurance are bundled in, PITI is the number that best reflects what it actually costs to keep the house each month. A lender's quoted principal-and-interest figure ignores two of the four letters, which is exactly why the quoted number tends to understate the real cost.

How principal and interest are calculated

The principal-and-interest portion of a fixed-rate mortgage is set by an amortization formula. The monthly payment M equals P × [ r(1+r)^n ] ÷ [ (1+r)^n − 1 ], where P is the loan amount, r is the monthly interest rate (the annual rate divided by 12), and n is the total number of monthly payments. This produces a level payment that stays constant for the life of the loan, even as the internal split between principal and interest changes.

Consider a $360,000 loan at a 6.5% fixed annual rate over 30 years. The monthly rate is 0.065 ÷ 12, and n is 360 payments. Plugging into the formula gives a principal-and-interest payment of about $2,275.44 per month. That single number is what most rate quotes and ads highlight.

On the very first payment, interest is charged on the full balance: $360,000 × (0.065 ÷ 12) = $1,950. That leaves only $325.44 to reduce principal. This is why early payments barely dent the balance — and, as the CFPB notes, why the equity built in the early years is much smaller than the sum of the payments made so far.

Taxes and insurance: the part quotes leave out

Property taxes are assessed by your county or municipality based on the home's assessed value, and they vary widely by location. Homeowners insurance protects the property against covered losses like fire or storm damage and is typically required by the lender as a condition of the loan. Both are real, recurring costs of ownership that the principal-and-interest figure completely excludes.

Because these bills arrive once or twice a year rather than monthly, most lenders collect them in twelfths through an escrow account (covered in the next section). Suppose the home in this example is worth $400,000 with annual property taxes of $4,800 and a homeowners insurance premium of $1,800. That adds $400 and $150 per month, respectively — another $550 on top of the $2,275.44 in principal and interest.

Tax and insurance amounts are not fixed. As the CFPB points out, when property tax assessments rise or insurance premiums increase, the escrow portion of the payment goes up to match, so the total monthly payment can climb over time even on a fixed-rate loan whose principal-and-interest figure never changes.

PMI, HOA, and other add-ons

Private mortgage insurance, or PMI, is commonly required on conventional loans when the down payment is less than 20%. PMI protects the lender — not the borrower — if the loan defaults, and it is added to the monthly payment until enough equity is built. In this example, a $400,000 home with 10% down leaves a $360,000 loan at 90% loan-to-value, so PMI applies. At a representative rate of 0.5% of the loan balance per year, that is $1,800 annually, or $150 per month.

PMI is not permanent. Under the federal Homeowners Protection Act, a borrower can request that the servicer cancel PMI once the balance is scheduled to reach 80% of the home's original value, and the servicer must automatically terminate it when the balance reaches 78%, provided payments are current. This is a key reason the true payment can shrink over the life of a loan even before the mortgage is paid off.

Homeowners association (HOA) dues are another common add-on for condos and many planned communities — say $250 per month in this example. Unlike taxes and insurance, HOA fees are usually paid directly to the association rather than through escrow, but they are still part of the real monthly cost of the home. Government-backed loans have their own equivalents, such as FHA mortgage insurance premiums, which behave differently from conventional PMI.

How escrow ties it together

An escrow account (sometimes called an impound account) is set up by your servicer to collect and pay your property taxes and insurance. The CFPB describes it as taking a portion of each monthly mortgage payment, holding it, and paying those large bills on the borrower's behalf when they come due. This spreads two big annual expenses into smaller, predictable monthly amounts.

Escrow explains why the servicer, not just the lender, matters. The servicer estimates the yearly tax and insurance bills, divides by twelve, and adds that to the payment. Because those estimates are reviewed periodically, most borrowers receive an annual escrow analysis that can raise or lower the monthly payment and may produce a shortage the borrower owes or a surplus that is refunded.

Not every borrower has an escrow account — some pay taxes and insurance directly — but many loans require one, and the CFPB notes that a borrower can even request one voluntarily. Either way, the underlying costs are the same; escrow simply changes the timing. When comparing a quoted principal-and-interest figure to an actual budget, it helps to remember that escrowed taxes and insurance are real dollars leaving the account every month.

Putting it together: the true monthly cost

Stacking the pieces from this example shows the gap between the quote and reality. Principal and interest come to $2,275.44. Add $400 for property taxes, $150 for homeowners insurance, $150 for PMI, and $250 for HOA dues, and the total monthly cost is about $3,225.44. The principal-and-interest figure — the number most likely to appear in an ad or an initial quote — is only about 70% of the true payment.

A common mistake is budgeting off the quoted principal-and-interest number alone. On this loan, doing so would understate the real monthly obligation by roughly $950, or more than $11,000 a year. The gap is largest for buyers with smaller down payments (who pay PMI), in high-tax areas, or in HOA communities.

The composition also shifts over time. PMI falls away once the loan reaches the 80%–78% equity thresholds, so that $150 eventually disappears. Meanwhile taxes and insurance tend to drift upward with assessments and premiums. A mortgage payment calculator that separates taxes, insurance, PMI, and HOA — rather than showing principal and interest only — gives a far more honest picture of what a home will cost each month.

Frequently asked questions

What does PITI stand for?

PITI stands for principal, interest, taxes, and insurance — the four core components of a typical monthly mortgage payment. Principal and interest repay the loan itself, while taxes go to your local government and insurance protects the home. Many payments also include PMI and HOA dues on top of PITI.

Why is an actual mortgage payment higher than the rate quote?

Most rate quotes show only principal and interest, which is the amount that repays the loan. The actual payment usually also includes property taxes and homeowners insurance (often collected through escrow), and may include private mortgage insurance and HOA dues. On a typical loan, principal and interest can be around 70% of the true monthly cost, so the quote understates what is actually paid.

When does PMI go away?

For conventional loans, the federal Homeowners Protection Act lets a borrower request cancellation of PMI once the loan balance is scheduled to reach 80% of the home's original value, and requires the servicer to automatically terminate it at 78%, as long as payments are current. Cancellation generally requires a written request, a good payment history, and no other liens on the property.

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Sources & further reading

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Planning disclaimer

This guide is for general informational and planning purposes only. It does not provide personalized financial, investment, tax, legal, accounting, lending, or business advice.

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