Homeownership comes with a set of tax advantages that most owners either claim incompletely or miss entirely. The mortgage interest deduction gets the most attention, but it is only one piece of a larger picture that includes property taxes, energy improvements, home office use, rental income rules, and a capital gains exclusion that can shelter hundreds of thousands of dollars when you sell. Knowing each break and when it applies is the difference between an adequate return and a maximized one.
The rules changed significantly with the Tax Cuts and Jobs Act of 2017, and additional changes arrived with the Inflation Reduction Act of 2022. Working from outdated guidance can mean leaving money on the table or claiming deductions you no longer qualify for.
The mortgage interest deduction allows you to deduct the interest paid on qualified mortgage debt from your taxable income, but only if you itemize deductions rather than taking the standard deduction. For loans originated after December 15, 2017, the deduction is limited to interest on up to $750,000 of mortgage principal ($375,000 if married filing separately). Loans originated before that date are grandfathered under the prior $1,000,000 limit.
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View on Amazon →Qualified mortgage debt includes the loan used to buy, build, or substantially improve your primary residence or a second home. If your mortgage balance is below the limit, you deduct all the interest shown on your Form 1098 from your lender. If your balance exceeds $750,000, you calculate the deductible portion using IRS Worksheet 1 from Publication 936.
Home equity loan interest is deductible only if the loan proceeds were used to buy, build, or substantially improve the home that secures the debt. Using a home equity line of credit for a vacation or to pay off credit cards does not produce deductible interest under current rules. Keep records of exactly how you used the proceeds, especially if you mixed purposes across different withdrawals.
Property taxes paid on your primary and secondary residences are deductible as part of the state and local tax deduction, also called SALT. However, the Tax Cuts and Jobs Act capped the total SALT deduction at $10,000 per tax return ($5,000 for married filing separately). This cap covers state income taxes or sales taxes plus property taxes combined. In high-tax states where property taxes alone often exceed $10,000, this cap eliminates the incremental benefit of the deduction entirely for many homeowners.
The property tax must be assessed and paid during the tax year to be deductible in that year. Escrow accounts often create timing confusion: only the amounts your servicer actually paid to the tax authority during the year are deductible, not what you deposited into escrow. Your year-end mortgage statement or Form 1098 will show property taxes paid from escrow. If you pay directly, your county tax records provide the same documentation.
| Deduction or credit | Limit or cap | Itemize required? | Key condition |
|---|---|---|---|
| Mortgage interest | $750k debt cap (post-2017) | Yes | Qualified residence debt only |
| Property taxes (SALT) | $10,000 combined cap | Yes | Actual taxes paid in the year |
| Mortgage points (purchase) | Full amount if qualifying | Yes | Must meet IRS requirements |
| Home office (self-employed) | Proportional to exclusive use area | No (Schedule C) | Regular and exclusive business use |
| Energy efficiency credit | 30% up to $3,200/year (25C) | No (Form 5695) | Qualifying improvements by type |
| Residential clean energy credit | 30% no cap through 2032 | No (Form 5695) | Solar panels, geothermal, wind |
| Home sale exclusion | $250k single / $500k MFJ | No | Own and use 2 of last 5 years |
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Mortgage points, also called origination fees or discount points, are prepaid interest. One point equals 1 percent of the loan amount. Points paid on a loan to purchase your primary residence are generally deductible in the year paid, provided the loan is used to buy or improve your home, the points were not used for closing costs that are not interest, and the amount paid does not exceed the normal range for your area. Your Form 1098 will report points paid if they qualify.
Points paid on a refinance must be deducted over the life of the loan, not all in the year paid. If you paid $3,000 in points on a 30-year refinance, you deduct $100 per year. If you pay off or refinance again before the loan term ends, you can deduct the remaining unamortized points in the year of payoff. If you are on your third refinance, remember to check whether any unamortized points from prior refinances were correctly written off when each loan ended.
Refinance rules also affect your mortgage interest deduction. If you refinanced after December 15, 2017, only the portion of the new loan that does not exceed the outstanding balance of the old loan is treated under the old $1,000,000 limit. Any cash-out above the original balance is subject to the $750,000 cap and must meet the qualified-use test to produce deductible interest.
If you are self-employed and use part of your home regularly and exclusively as your principal place of business, you can deduct a proportional share of home expenses including mortgage interest, rent, utilities, insurance, and depreciation. The exclusive-use requirement is strict. A room used for both client meetings and family movie nights does not qualify. The IRS looks for a space dedicated entirely to business use.
Calculate the deductible percentage by dividing the square footage of your dedicated office by the total square footage of the home. If your home is 1,800 square feet and your dedicated office is 180 square feet, 10 percent of qualifying home expenses are deductible. The simplified method allows a flat $5 per square foot deduction up to 300 square feet without tracking actual expenses.
Remote employees working from home for an employer cannot claim the home office deduction under current federal rules. This changed with the Tax Cuts and Jobs Act in 2018, which eliminated the unreimbursed employee expense deduction. Only self-employed individuals and business owners who use a dedicated home office can claim this deduction on Schedule C or Schedule F.
The Inflation Reduction Act of 2022 significantly expanded residential energy tax credits. The Energy Efficient Home Improvement Credit, also called the 25C credit, allows a 30 percent credit on qualifying improvements each year, capped at $3,200 total annually with sub-limits by category. Heat pumps qualify for up to $2,000. Insulation, exterior windows, and exterior doors qualify for up to $1,200. A home energy audit qualifies for up to $150. These credits reset annually, meaning you can claim them in multiple years for different improvements.
The Residential Clean Energy Credit, or 25D credit, covers larger investments. Solar electric panels, solar water heaters, geothermal heat pumps, wind turbines, battery storage systems, and fuel cells all qualify. The credit is 30 percent of the cost with no annual dollar cap through 2032, stepping down to 26 percent in 2033 and 22 percent in 2034. A $30,000 solar installation produces a $9,000 credit directly reducing your tax liability.
Both credits are nonrefundable, meaning they reduce your tax bill to zero but will not generate a refund if the credit exceeds what you owe. Any unused residential clean energy credit can be carried forward to future years. Claim both on Form 5695 and keep contractor invoices as proof that installed products meet the required efficiency ratings.
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The home sale exclusion is one of the most valuable tax benefits in the tax code. If you owned and lived in your home as your primary residence for at least two of the five years before the sale, you can exclude up to $250,000 of capital gain ($500,000 for a married couple filing jointly) from federal taxable income. A couple who bought a home for $400,000, made $100,000 in improvements, and sold for $1,100,000 has a gain of $600,000. After the $500,000 exclusion, only $100,000 is taxable.
Your cost basis is the purchase price plus qualifying capital improvements minus any depreciation you claimed for business or rental use. Improvements that increase basis include additions, renovations, new roofing, HVAC replacement, and landscaping. Repairs that simply maintain current condition do not increase basis. This is why tracking every improvement with receipts from the day you purchase the home matters. A $50,000 kitchen renovation documented and added to basis can save $10,000 to $15,000 in capital gains taxes at sale.
If you rent out part or all of your home, the rental portion is subject to different rules. Rental income is reportable and expenses allocable to the rental space are deductible against that income. Depreciation must be claimed on the rental portion, reducing your basis and creating a depreciation recapture obligation at sale. If you converted a primary residence to a rental, you may still qualify for a partial home sale exclusion if you lived there for two of the last five years, but rental depreciation must be recaptured regardless.
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A complete homeowner tax checklist with every deduction and credit, documentation requirements, and planning strategies to lower your tax bill this year.
For loans originated after December 15, 2017, you can deduct interest on up to $750,000 of qualified mortgage debt. Loans before that date are grandfathered at $1,000,000. The deduction is only available if you itemize deductions, which means your total itemized deductions must exceed the standard deduction of roughly $14,600 for single filers and $29,200 for joint filers in 2024.
The state and local tax deduction is capped at $10,000 per tax return regardless of how much you pay. This cap covers state income taxes or sales taxes plus property taxes combined. In high-tax states where property taxes alone often exceed $10,000, the cap eliminates any incremental benefit. Only the amounts actually paid to the taxing authority during the year are deductible, not escrow deposits.
Points paid on a home purchase loan are generally deductible in full in the year paid if the loan is used to buy or improve your primary residence and the points meet IRS requirements. Points paid on a refinance must be amortized over the loan term. If you pay off a refinanced loan early, the remaining unamortized points are deductible in the year of payoff.
A space used regularly and exclusively for business as your principal place of business qualifies. The exclusivity rule is strict: a room used for both work and personal activities does not qualify. Only self-employed individuals can claim this deduction; remote employees working for an employer lost this deduction under the Tax Cuts and Jobs Act of 2018. Calculate the deductible percentage based on office square footage divided by total home square footage.
The 25C Energy Efficient Home Improvement Credit covers heat pumps up to $2,000, insulation and windows up to $1,200, and energy audits up to $150, all at 30 percent of cost with a $3,200 annual total cap. The 25D Residential Clean Energy Credit covers solar panels, geothermal, battery storage, and wind at 30 percent with no dollar cap through 2032. Both credits reduce your tax bill directly and are claimed on Form 5695.
If you owned and lived in your home as a primary residence for at least two of the five years before selling, you can exclude up to $250,000 of capital gain if single or $500,000 if married filing jointly. The gain is calculated as the sale price minus your adjusted cost basis. Basis equals purchase price plus capital improvements minus any depreciation claimed for business or rental use.
Every qualifying capital improvement you make increases your cost basis, which reduces your taxable gain when you sell. A $50,000 kitchen renovation that is documented and added to basis can save $10,000 to $15,000 in capital gains taxes depending on your rate. Keep all contractor invoices, permits, and receipts from the date of purchase. Improvements that increase basis include additions, renovations, new roofing, and HVAC replacement. Routine repairs do not qualify.
The deduction for private mortgage insurance premiums has been available intermittently since 2006 but is not a permanent part of the tax code. Congress has extended it periodically. As of recent filing years it was available for adjusted gross incomes below certain thresholds and phases out above $100,000. Check current IRS guidance or your tax preparer for whether the PMI deduction is active for the tax year you are filing.