What is the real monthly cost of a home with a mortgage? It is not just the payment: there are also property taxes and insurance. The PITI is the sum of all these items and represents the real monthly payment you make for the home. This calculator determines it: it calculates the principal + interest payment, the monthly taxes and insurance, the total PITI payment and the total interest of the mortgage, telling you how much the accessory costs weigh beyond the payment. It is the right tool to know the complete cost of the home.

What PITI is

The PITI is the acronym of the four components of a mortgage's monthly payment: Principal, Interest, Taxes (property taxes) and Insurance. While many think only of the mortgage payment, the PITI shows the total monthly cost of the home, including the items that are often underestimated. It is the measure used by lenders to assess the affordability of a mortgage, because it reflects how much you really spend each month on the property.

The four components: P, I, T, I

The first two letters — P and I — are the actual mortgage payment: the portion of principal repaid and the interest. The last two — T and I — are the accessory costs linked to the property: the property taxes and the home insurance. Together they form the PITI. Understanding all four components is essential to grasp the real monthly commitment: two homes with the same mortgage payment can have very different PITIs because of taxes and insurance.

Principal and interest (P&I)

The principal + interest payment (P&I) is the heart of the payment: the part that repays the loan to the bank. It is calculated with the amortization formula, and at the beginning it is composed mostly of interest, while over time the principal portion grows. It is the only part of the PITI that actually repays the debt; the other items are costs of the property that you will keep paying even after paying off the mortgage.

The property taxes (T)

The property taxes are the taxes on the property, which vary by area and property value. They are often divided into twelve and added to the monthly payment, sometimes paid by the lender through an escrow account. They are a significant and recurring expense: unlike the mortgage, they never end, because you pay them as long as you own the home. In some areas property taxes are so high as to weigh as much as a substantial part of the payment.

The insurance (I)

The home insurance protects the property from damage (fire, natural events, etc.) and is generally required by the lender as a condition of the mortgage. It too is often divided into twelve and included in the monthly payment. Like taxes, it is a permanent cost of the property. If the down payment is low (high LTV), the lender may also require additional mortgage insurance, which however is not part of the base PITI calculated here.

How the calculator works

Enter the loan amount, the rate, the term, the annual property taxes and the annual insurance. The calculator determines the principal + interest payment with the amortization formula, divides taxes and insurance by twelve, and sums everything to obtain the total PITI payment. It also calculates the total interest of the mortgage. The verdict tells you how much the accessory costs (taxes and insurance) weigh on the payment relative to the payment alone.

The values you need

The loan amount is the financed capital. The rate is the annual interest. The term is the number of years of the amortization plan. The annual property taxes are the tax on the property on an annual basis. The annual insurance is the home policy premium. Use realistic values for your area: taxes and insurance vary a lot from place to place and weigh significantly on the total payment.

The principal + interest payment

The principal + interest payment is the monthly mortgage payment, calculated on the amount, the rate and the term. It is the largest item of the PITI for most mortgages. Increasing the down payment or shortening the term changes it; the rate is the main factor. It is the only component that reduces the debt exposure over time: each payment reduces the residual capital a bit, until the loan is paid off.

The monthly taxes and insurance

The monthly taxes and insurance are the annual amounts divided by twelve. They are often set aside by the lender in an escrow account and paid when due, so you pay a constant share each month. These two items, summed, can weigh quite a lot on the total payment, especially where property taxes are high. The calculator shows them separately, so you clearly see how much of your monthly payment goes beyond the mortgage.

The total PITI payment

The total PITI payment is the sum of all the components: the real monthly outlay for the home. It is the number that matters for your budget and that lenders use for qualification. Comparing the PITI with the mortgage payment alone reveals how much the accessory costs weigh: on many homes, taxes and insurance add 20-30% to the payment. Knowing the PITI avoids the surprise of a monthly payment higher than expected.

The components of the PITI

The four items that compose the monthly payment:

Principal and interest end with the mortgage; taxes and insurance remain as long as you own the home.

The effect of taxes

Property taxes weigh a lot on the PITI, and vary by area. On a €250,000 mortgage (P&I payment of about €1,342 at 5% over 30 years):

High taxes can add hundreds of euros to the monthly payment: they should always be considered before buying.

PITI and the 28% rule

Lenders often use the 28% rule for qualification:

The rule suggests that the PITI does not exceed 28% of the gross monthly income: that is why the full PITI, and not just the payment, is what matters to understand what you can afford.

Why PITI matters for qualification

When you apply for a mortgage, the lender does not look at the payment alone, but at the full PITI, because it is the real monthly commitment for the home. It uses it to calculate the payment-to-income ratio (front-end ratio) and to assess whether you can sustain the payment. A home with high property taxes may require a higher income to qualify, even if the mortgage payment is contained. Knowing the PITI helps you understand your real qualification in advance.

What PITI does NOT include

The base PITI does not include everything. Left out are the condominium fees (HOA), the maintenance, the utilities (electricity, gas, water) and any mortgage insurance (PMI) required with low down payments. The real cost of owning a home is therefore higher than the PITI. For a complete budget picture, add these items to the PITI: only then will you have a realistic estimate of how much living in the home really costs you each month.

Common mistakes

• Considering only the mortgage payment, forgetting taxes and insurance.
• Underestimating the property taxes, which vary a lot by area.
• Not including the full PITI in the assessment of what you can afford.
• Forgetting the costs outside the PITI: condominium, maintenance, utilities, PMI.
• Ignoring that taxes and insurance continue even after paying off the mortgage.

How to use the calculator

Enter amount, rate, term, taxes and insurance. Read the principal+interest payment, the taxes and insurance shares and the total PITI payment. Compare the PITI with the payment alone to see how much the accessory costs weigh. Try different areas with different taxes to understand how the payment changes. It is the quickest way to know the real monthly cost of a home before buying it and to verify whether it fits your budget.

Practical example

You buy a home with a €250,000 mortgage at 5% over 30 years, with €2,400 of annual property taxes and €1,200 of annual insurance. The result: a principal+interest payment of €1,342, €200 of monthly taxes, €100 of monthly insurance, a total PITI payment of €1,642 and about €233,000 of total interest, with the verdict "moderate weight of taxes and insurance". The accessory costs add €300 a month to the payment, 22% more. Enter your numbers for your real situation. The PITI does not include condominium, maintenance, utilities and any mortgage insurance; taxes and insurance vary by area. It is an informational estimate.

Frequently asked questions

What does PITI mean?

PITI is the acronym of Principal, Interest, Taxes (property taxes) and Insurance: the four components of the total monthly payment of a mortgage, beyond the payment alone.

How is the PITI calculated?

You calculate the principal+interest payment with the amortization formula, divide the annual taxes and insurance by twelve, and sum the three shares. The result is the total monthly payment.

What is the difference between the mortgage payment and the PITI?

The mortgage payment is only principal and interest (P&I); the PITI adds the property taxes and the insurance. The PITI is the real payment for the home and often exceeds the payment alone by 20-30%.

Why do lenders use the PITI?

Because it reflects the real monthly commitment for the home. Lenders calculate the ratio between PITI and income (front-end ratio) to assess whether you can sustain the payment, not just on the payment but on the total cost.

What is the 28% rule?

It is a guideline according to which the PITI should not exceed 28% of the gross monthly income. On an income of €5,000, the recommended maximum PITI is €1,400. It helps understand how much home you can afford.

Do taxes and insurance end with the mortgage?

No: principal and interest end when you pay off the mortgage, but you keep paying the property taxes and the insurance as long as you own the home. They are permanent costs of the property.

What is an escrow account?

It is an account where the lender sets aside the monthly shares of taxes and insurance, then paying them when due. This way you pay a constant amount each month and avoid large annual lump-sum payments.

Does the PITI include mortgage insurance (PMI)?

The base PITI calculated here does not. If the down payment is low (high LTV), many lenders require additional mortgage insurance (PMI), which should be added separately to the PITI for the real cost.

What does the PITI NOT include?

It does not include condominium fees (HOA), maintenance, utilities (electricity, gas, water) and any PMI. The real cost of owning a home is therefore higher than the PITI: add these items for a complete budget.

Why do property taxes vary so much?

Because they depend on the area, the municipality and the cadastral or market value of the property. Two homes with the same mortgage payment can have very different PITIs if the local taxes are very different.

Should I consider the PITI before buying?

Absolutely yes: looking only at the mortgage payment underestimates the real cost. Calculating the full PITI, including taxes and insurance, avoids the surprise of a higher monthly payment and tells you what you can really afford.

Does it work for any country and currency?

Yes, the calculation is universal and uses the values in your currency. The structure of property taxes and insurance varies by country, but the PITI principle — summing all the components — is valid everywhere.

Updated July 2026