A $2,000 mortgage doesn’t mean your house actually costs $2,000 a month. In practice, it almost always costs more.
Property taxes, homeowners insurance, maintenance, utilities, and HOA dues can add thousands more each year. In fact, a 2026 Zillow and Thumbtack analysis puts the first three costs at $16,566 a year for the typical U.S. homeowner, or roughly $1,380 a month on top of the mortgage. Maintenance alone accounts for about $11,171 of that figure.
However, none of this means that buying a home is a bad financial move. It simply means you need a more accurate figure than just the monthly mortgage payment to calculate the real cost.
Start With the Full Monthly Housing Cost
Your mortgage statement gives you a starting point, but again, it’s not the full picture. Principal and interest make up the core loan payment. Depending on your loan, you may also pay mortgage insurance.
Property taxes and homeowners insurance are often collected through escrow, which can make them feel like part of the mortgage. Yes, they are separate costs of owning the property, but they’re not optional.
So, build your monthly estimate with all of these factors in mind:
- Mortgage principal and interest
- Property taxes
- Homeowners insurance
- Mortgage insurance, if applicable
- HOA or condo fees
- Utilities
- Routine maintenance
- A monthly contribution toward larger repairs
These are all real costs that should be taken into account alongside the mortgage payment. Because a mortgage that looks manageable on paper can feel very different once you add insurance, taxes, repairs, and the other costs of keeping the property running.
However, understanding the true cost matters on the other side of the equation, too. When you buy a house, you’re also getting plenty in return for those ongoing expenses, including building equity and potential long-term appreciation.
Upfront Costs Can Be Higher Than Expected
The down payment gets most of the attention because it is usually the biggest upfront expense. However, it’s far from the only one.
Closing costs generally run around 2% to 5% of the purchase price, excluding the down payment. They can include lender charges, appraisal and title-related costs, government fees, prepaid interest, homeowners insurance, and initial escrow deposits.
There are other expenses to take into account as well: movers, furniture, changing locks, appliances, landscaping, and potentially more. Of course, you don’t need a separate budget for every possible $80 purchase. What you need is enough cash left after closing so a few unexpected expenses will not send you straight to a credit card.
Maintenance Needs Its Own Budget
A renter can call a landlord when the water heater breaks. A homeowner? You have to deal with it yourself.
That’s how you should think about maintenance. Look at the age and condition of the home’s major systems before you buy it, then estimate when each one may need attention. Roof, HVAC, water heater, plumbing, electrical, windows, and appliances all have different lifespans and replacement costs.
A common planning rule suggests setting aside around 1% to 2% of the home’s value each year for maintenance, but there’s no perfect percentage that works for every property. A newer townhouse in an HOA is not financially comparable to a 70-year-old detached house with mature trees and an aging roof.
Just keep in mind that Zillow/Thumbtack statistic: maintenance is the largest of the three major hidden ownership costs. Nationally, it averages $11,171 a year.
Insurance and Taxes Can Fluctuate
People often think of property taxes and insurance as fixed because the lender collects them through escrow. Unfortunately, they’re not fixed.
Your lender may divide the annual bill into monthly payments, but that doesn’t make the underlying cost permanent. Property taxes can change, and insurance premiums can rise when insurers change rates or when conditions in your area affect risk.
Insurance deserves particular attention right now. Zillow’s October 2026 analysis found that homeowners insurance costs had increased 54% over five years, compared with a 32% increase in maintenance and 19% in property taxes across the markets it analyzed.
So when you compare two houses, do not just compare their mortgage payments. Get actual insurance quotes if possible, check the current property tax bill, and ask whether the home’s assessment is likely to change after purchase.
Build a Property-Specific Budget
Forget the generic “Can I afford a $400,000 home?” calculation for a minute. Ask whether you can afford this particular $400,000 home.
Pull the property’s current tax bill. Get an insurance estimate. Check the HOA fee and financial condition. Ask the seller about the age of the roof, HVAC, water heater, and major appliances. Read the inspection report with a dollar figure in mind, not just a list of scary-sounding defects.
Then put the expected annual costs into a spreadsheet and divide them by 12. Add a separate repair reserve.
You might discover that the $400,000 house is perfectly comfortable. Or you might discover that a slightly cheaper property with a 20-year-old roof is actually the more expensive choice.
That’s your most useful number. Not what the bank says you can borrow or what the listing agent says you can “easily afford.” The number that matters is what it costs to run the house once you own it, which includes the expenses that don’t come with a monthly payment.
