How Buying a House Affects Your Taxes
Quick Answer
Buying a house provides two main tax deductions: mortgage interest (on up to $750,000 in debt) and property taxes (capped at $10,000 combined with state income tax under the SALT limit). However, these deductions only help if they exceed your standard deduction ($15,000 single / $30,000 married), which means many homeowners — especially those with smaller mortgages — see little or no tax benefit from buying.
The Two Key Homeowner Deductions
1. Mortgage Interest Deduction
You can deduct interest paid on up to $750,000 of mortgage debt. In the early years of a mortgage, most of your payment goes to interest, making this deduction most valuable at the start.
| Mortgage Amount | Rate | First-Year Interest | Deductible? |
|---|---|---|---|
| $300,000 | 6.5% | ~$19,200 | Yes (under $750K limit) |
| $500,000 | 6.5% | ~$32,000 | Yes (under $750K limit) |
| $800,000 | 6.5% | ~$51,200 | Partially (only on first $750K) |
2. Property Tax Deduction (SALT Cap)
Property taxes are deductible, but combined with state and local income taxes, the total State and Local Tax (SALT) deduction is capped at $10,000.
This cap particularly affects homeowners in high-tax states with expensive homes. A homeowner in New York paying $8,000 in property tax and $7,000 in state income tax has $15,000 in SALT expenses but can only deduct $10,000.
Real Example: Does Buying Help Your Taxes?
Michael is single, earns $95,000 in Texas, and buys a $350,000 home with a $280,000 mortgage at 6.5%.
| Deduction | Amount |
|---|---|
| Mortgage interest (year 1) | ~$17,900 |
| Property taxes ($350K x 1.6%) | $5,600 |
| SALT total (property tax only, no state income tax in TX) | $5,600 |
| Total itemized deductions | $23,500 |
| Standard deduction (single) | $15,000 |
Michael's itemized deductions ($23,500) exceed the standard deduction ($15,000) by $8,500. At his 22% marginal rate, this saves about $1,870 in federal taxes compared to renting and taking the standard deduction.
Now compare a married couple with a smaller mortgage:
Lisa and Dan are married, earn $120,000 combined in Florida, and buy a $300,000 home with a $240,000 mortgage at 6.5%.
| Deduction | Amount |
|---|---|
| Mortgage interest | ~$15,300 |
| Property taxes | $2,400 |
| Total itemized | $17,700 |
| Standard deduction (MFJ) | $30,000 |
Their itemized deductions ($17,700) are well below the $30,000 standard deduction. Buying the house provides zero additional tax benefit because they take the standard deduction regardless.
Run your numbers at the SalaryHog calculator.
When Buying Helps Taxes Most
You are most likely to benefit when:
- You have a large mortgage ($400,000+)
- You live in a high-tax state (state income tax pushes SALT toward the $10,000 cap)
- You are single (lower standard deduction of $15,000 is easier to exceed)
- Interest rates are high (more interest to deduct)
- You also have significant charitable contributions
Other Homeownership Tax Benefits
Capital Gains Exclusion
When you sell your primary residence, you can exclude up to $250,000 (single) or $500,000 (married) of capital gains from taxes, as long as you lived in the home for at least 2 of the last 5 years.
Home Office Deduction
If you are self-employed and work from home, the home office deduction can include a portion of your mortgage interest, property taxes, insurance, and utilities.
Energy Credits
Federal tax credits for energy-efficient improvements (solar panels, heat pumps, insulation) can save $500-$2,000+ on your tax bill.
The Bottom Line
Do not buy a house solely for the tax benefits. The standard deduction is large enough that many homeowners never itemize. Buy because you want stability, equity building, and a place to live. The tax benefits are a nice bonus when they apply, but they should not be the primary driver.
Estimate your take-home pay and check rent affordability at the SalaryHog calculator.