Buying and Financing
True Cost of Homeownership Calculator
Estimate what a home really costs each month and each year: the mortgage, property taxes entered by taxing unit with homestead exemptions, HOA dues, homeowners, flood and windstorm insurance, a maintenance reserve, utilities and the cash you need at closing. Compare two scenarios side by side.
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How this calculator works
Two homes at the same price in the Houston area can cost hundreds of dollars a month apart. The difference is usually property taxes (county, city, school district and special districts such as a MUD each levy their own rate), HOA dues, insurance and upkeep. This calculator puts all of them in one monthly and first-year figure.
Nothing that depends on the address is filled in for you: enter insurance quotes, closing costs and the tax rates for the address. If the site has official figures for a community, pick it to fill in its taxing-unit rates and HOA dues, each with the year and a source link. Anything we could not verify stays blank. Use + Compare to copy the scenario and change one thing, such as the community or the down payment.
- Property taxes: for each taxing unit, (taxable value - that unit's homestead exemption, if you mark it) x rate per $100 / 100. The units are added once each; a repeated row with the same name and rate is skipped. An actual tax bill, if you enter one, replaces the rows.
- Effective total tax rate = yearly property taxes / home price. It is lower than the sum of the rates when exemptions apply or the taxable value is below the price.
- Principal, interest and mortgage insurance use the same engine and program rules as the Mortgage Payment Calculator (PMI, FHA MIP, VA funding fee, USDA fees). The interest rate and PMI rate are illustrative examples.
- Monthly total = principal and interest + mortgage insurance + 1/12 of taxes, insurance, HOA dues and the maintenance reserve + utilities. The first-year total uses the first 12 scheduled payments.
- Cash needed at closing = down payment + closing costs and prepaids + HOA transfer and capital contribution fees (+ any upfront program fee you choose not to finance).
Worked example
Hypothetical tax rates, homestead exemption, HOA dues, insurance premium and closing costs to show the math. They are not the figures for any community or address; the interest rate, PMI rate and 1% maintenance reserve are illustrative. These are the numbers the calculator above starts with after these inputs are entered.
Inputs
- Loan type
- Conventional
- Home price
- $400,000
- Down payment
- $40,000 (10%)
- Interest rate (illustrative example)
- 6.5%
- Loan term
- 30 years
- Homestead exemption amount
- $140,000
- County
- Rate per $100 0.4
- School district (ISD)
- Rate per $100 1 · Homestead exemption yes
- MUD / WCID
- Rate per $100 0.8
- Emergency services district (ESD)
- Rate per $100 0.1
- College district
- Rate per $100 0.1
- Master HOA assessment per year
- $900
- Homeowners insurance per year
- $2,400
- Maintenance reserve (% of price per year)
- 1%
- Closing costs and prepaids
- $9,000
- HOA transfer and resale certificate fees
- $400
Results
- Community figures
- Your own
- Home price
- $400,000
- Down payment
- $40,000 (10.0%)
- Principal and interest
- $2,275
- Mortgage insurance
- $150
- Property taxes per month
- $683
- Effective total tax rate
- 2.050%
- Insurance per month (home, flood, wind)
- $200
- HOA and fees per month
- $75
- Maintenance reserve per month
- $333
- Utilities per month
- $0
- Total monthly cost
- $3,717
- First-year total
- $44,605
- Cash needed at closing
- $49,400
Common questions
How are Texas property taxes figured?
Each taxing unit that covers the address (county, city, school district, MUD or other district, ESD, college district and others) adopts its own rate per $100 of taxable value, and the bill is the sum of each unit's rate times its taxable value. The appraisal district sets the value; the taxing units set the rates. The county tax office publishes the adopted rates for every unit.
Sources: Harris County Tax Office: jurisdiction tax rates; HCAD: Texas first-time property owner.
Why does the homestead exemption apply only to the rows I mark?
Because each taxing unit has its own exemption. The school district exemption is set by state law ($140,000 for a residence homestead, plus $60,000 for owners 65 or older or disabled, per HCAD's 2026 guide), and other units may adopt an optional percentage exemption of up to 20% (at least $5,000). Some units offer none. Mark only the units the appraisal district record lists, and enter each unit's amount if it differs.
Sources: HCAD: Homeowner exemptions (2026, PDF); Texas Comptroller: Property tax exemptions.
What is a MUD tax, and how do I know if a home has one?
A municipal utility district is a special district that often funds water, sewer and drainage in newer subdivisions and repays its bonds through its own property tax rate. Texas law requires the seller to give the buyer a statutory notice with the district's tax rate before the contract is signed. The appraisal district or tax office record for the address lists every taxing unit, including the MUD.
Where do the community figures come from?
From the site's sourced community research: tax rates only from the county tax office, appraisal district or the district itself, and HOA assessments only from the association or the developer, each with its year. A community preset fills only the taxing-unit rows and HOA dues. When a figure is not verified, or a unit may not cover every address in the community, the field stays blank and the results say so.
Do I need flood or windstorm insurance?
Lenders require flood insurance for homes in a FEMA high-risk flood zone with a federally backed mortgage, and standard homeowners policies generally do not cover flood. Most new NFIP policies start 30 days after purchase, with exceptions such as a policy bought with a new mortgage. Separate windstorm coverage matters on the coast, where TWIA writes wind and hail policies; it does not cover flood. Get quotes for the address during your option period.
Sources: FEMA: Flood insurance (NFIP); FloodSmart: Buy a flood insurance policy; TWIA: FAQ.
What HOA fees are due at closing?
Associations may charge transfer, resale certificate and capital contribution or working-capital fees when a home sells, in addition to the regular assessment. The resale certificate, which the association must provide on request, lists the regular and special assessments and any fees owed when the property is transferred. Enter the amounts from it.
Is the maintenance reserve a real cost?
No. It is a rule of thumb for planning: many owners set aside about 1% of the home's value a year. Older homes, pools and large lots usually need more; new homes less in the first years. Change it to fit the home.
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Estimate only. Actual loan terms, eligibility, insurance, taxes, and settlement charges require verification. These are planning estimates, not a lender Loan Estimate, Closing Disclosure, appraisal, or approval. Michael O'Neal is a real estate broker, not a lender, appraiser, attorney or tax adviser.
Next step
Want a real financing quote? Connect with Home Front Mortgage.
Andrew Fairleigh, Mortgage Loan Originator, Home Front Mortgage, NMLS #1878546. (979) 595-8979 · [email protected]
Rates in these calculators are examples, not Home Front quotes. Your application goes to Home Front's secure site. Do not send financial documents through this website.
Affiliated business arrangement disclosure. This is to give you notice that some agents and owners at Keller Williams Realty Northeast, including Michael O'Neal, have a business relationship with certain providers of services related to your purchase, sale or refinance of real estate, including Home Front Mortgage and Keystone Title & Escrow. Because of this relationship, a referral may provide some owners and agents at Keller Williams Realty Northeast a financial or other benefit. You are NOT required to use either company as a condition for your purchase, your financing or refinance, or any other transaction related to a property. There are frequently other providers available with similar services. You are free to shop around to determine that you are receiving the best services and the best rate for these services. You will be given the written Affiliated Business Arrangement Disclosure, including estimated charges, to review and sign. Read the disclosure form with its estimated charges (PDF).