The home improvements that qualify for tax deductions fall into a narrow set of categories: renewable energy systems and certain efficiency upgrades earn federal tax credits, medically necessary modifications may be deductible if you itemize, and improvements to a qualifying home office or a rental property have their own rules. Most other capital improvements to your own home give you no immediate deduction at all. Instead, they raise your cost basis and reduce the taxable gain when you eventually sell. Routine repairs and maintenance never qualify.
Energy Credits Are the Main Immediate Write-Off
If you installed qualifying equipment, energy credits give you a dollar-for-dollar reduction of your federal tax bill in the year the property was placed in service. Two separate credits exist, they cover different equipment, and their dollar limits are very different. Both are claimed on IRS Form 5695, which attaches to Form 1040.
Renewable Energy Systems (Section 25D)
The larger credit applies to renewable energy installations at your home: solar electric panels, solar water heaters, small wind turbines, geothermal heat pumps, and biomass fuel systems. For property placed in service during 2021, the credit equaled 26% of the total installed cost, including labor. There was no dollar cap. A $30,000 solar installation produced a $7,800 credit, and any credit you couldn’t use that year could be carried forward.1Office of the Law Revision Counsel. 26 US Code 25D – Residential Clean Energy Credit2Internal Revenue Service. Instructions for Form 5695 (2021) – Residential Energy Credits
The Inflation Reduction Act of 2022 restored this credit to 30% and extended it through at least 2034 under its new name, the Residential Clean Energy Credit.3Internal Revenue Service. Home Energy Tax Credits
Efficiency Upgrades (Section 25C)
The smaller credit covers more modest efficiency work: insulation, energy-efficient exterior doors and windows, and certain heating and cooling equipment. For 2021, it equaled 10% of the cost of qualifying improvements, capped at $500 over your lifetime. If you had claimed any Section 25C credit in any year going back to 2006, that history reduced the amount still available. Sub-limits also applied inside the $500 cap: $200 for windows, $300 for any single piece of energy-efficient building property, and $150 for a qualifying furnace or boiler.4Office of the Law Revision Counsel. 26 US Code 25C – Energy Efficient Home Improvement Credit
For 2023 and later, the Inflation Reduction Act raised this credit to 30% with a $1,200 annual limit in place of the old $500 lifetime cap, and added a separate $2,000 annual credit for heat pumps.3Internal Revenue Service. Home Energy Tax Credits
Both credits are nonrefundable. They can reduce your tax to zero but won’t generate a refund on their own.
Medical Modifications
Home modifications made for medical reasons can be deducted as medical expenses under Section 213, but you have to clear two tests before any dollar becomes deductible.
First, the value test. Take the total cost of the improvement and subtract any increase in your home’s market value. Only the difference counts as a medical expense. Spend $10,000 on a home elevator that raises property value by $4,000, and $6,000 qualifies. Modifications that typically don’t raise a home’s value usually qualify for their full cost. IRS Publication 502 lists examples:5Internal Revenue Service. Publication 502 – Medical and Dental Expenses
- Entrance or exit ramps
- Widened doorways and hallways
- Railings, support bars, and grab bars
- Lowered or modified kitchen cabinets
- Moved or modified electrical outlets
- Porch lifts and stairway lifts
- Modified fire alarms and warning systems
- Grading the ground to provide access
Second, the AGI floor. Medical expenses are deductible only to the extent they exceed 7.5% of your adjusted gross income for the year, and you have to itemize on Schedule A to claim them.6Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses At $80,000 AGI, the first $6,000 of medical spending gives you nothing; only what’s above that line is deductible. A written recommendation from a physician documenting the medical necessity strengthens the deduction if the IRS ever questions it.
Everything Else Waits Until You Sell
Most improvements to your own home don’t give you an immediate deduction. What they do is increase your cost basis, which reduces your taxable gain when you sell.
Federal law lets you exclude up to $250,000 in gain from the sale of a principal residence, or up to $500,000 for a married couple filing jointly, provided you owned and lived in the home for at least two of the five years before the sale.7Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence Most sellers stay under those limits and never owe tax. If your gain runs higher, though, basis adjustments start to matter. A couple with $600,000 of gain and $75,000 of tracked improvements drops their taxable gain from $100,000 to $25,000.
Capital improvements are projects that add value, extend the home’s useful life, or adapt it to a new use. Common categories include:
- Additions such as bedrooms, bathrooms, decks, garages, or porches
- Systems: heating, central air, wiring, security, water filtration
- Exterior work: new roof, new siding, storm windows and doors
- Lawn and grounds: landscaping, driveways, fences, retaining walls, swimming pools
- Interior: kitchen modernization, built-in appliances, flooring, fireplaces
- Insulation in attics, walls, floors, pipes, and ductwork
The line between a repair and an improvement drives the rule. Fixing a leaky faucet is a repair. Replacing all the plumbing is an improvement. Patching a few windowpanes is a repair. Replacing every window as one project is an improvement. Repair-type work done as part of a larger remodel counts as improvement.8Internal Revenue Service. Publication 523, Selling Your Home
Painting, filling cracks, and replacing broken hardware don’t add to basis. Neither do improvements you’ve since removed, like carpet you later tore out. And if you received a federal energy credit for an improvement, you have to subtract the credit amount from the cost before adding what’s left to your basis.8Internal Revenue Service. Publication 523, Selling Your Home9Office of the Law Revision Counsel. 26 US Code 1016 – Adjustments to Basis
Home Office Improvements
If you’re self-employed and use part of your home exclusively and regularly as your principal place of business, you can deduct a share of improvement costs. “Exclusively” is doing real work in that sentence. A spare bedroom that also hosts overnight guests doesn’t qualify, no matter how many hours you work there.10Office of the Law Revision Counsel. 26 US Code 280A – Disallowance of Certain Expenses in Connection With Business Use of Home
How much you deduct depends on what got improved. Replace the flooring only in the office and the full cost is a business expense. Replace the roof on the whole house and you deduct only the office’s share of total square footage. Shared systems like HVAC or electrical upgrades follow the same proportional rule.
The simplified method skips the tracking: $5 per square foot up to 300 square feet, for a maximum $1,500 deduction. It’s easier, but it doesn’t let you deduct specific improvements on top.
One boundary worth stating plainly: W-2 employees who worked from home in 2021, even because of the pandemic, could not claim any home office deduction. The Tax Cuts and Jobs Act eliminated that deduction for employees starting in 2018.
Rental Property Improvements
Landlords play by different rules. Improvements to residential rental property aren’t deducted in one year. The cost is capitalized and recovered through annual depreciation over 27.5 years under the Modified Accelerated Cost Recovery System.11Office of the Law Revision Counsel. 26 US Code 168 – Accelerated Cost Recovery System A $27,500 kitchen renovation on a rental produces roughly a $1,000 depreciation deduction each year for 27.5 years.
Ordinary repairs on rental property, by contrast, are deducted in full in the year paid. Fixing a broken appliance or patching drywall is an immediate write-off. The repair-versus-improvement line matters at least as much for landlords as for owner-occupants, because for landlords it controls timing rather than whether the deduction exists at all.
There’s a shortcut. Landlords and other business-property owners without audited financial statements can elect the de minimis safe harbor, which allows immediate deduction of improvement costs up to $2,500 per item or invoice. The election is made on the tax return each year and can simplify record-keeping for smaller projects.
What Never Qualifies
Routine maintenance and repairs on your own home don’t produce a deduction, a credit, or a basis adjustment. Painting a room, filling cracks, replacing broken hardware, servicing appliances, fixing a faucet: none of it. The tax system treats keeping the house in its existing condition as a personal expense. Only work that meets one of the specific rules above earns any tax treatment at all.
Records to Keep
Every category above depends on documentation. Reconstructing records years later, especially for basis adjustments on a home you’ve owned for decades, is painful and often impossible.
- For capital improvements: receipts, contractor invoices, contracts, canceled checks, and before-and-after photographs. Keep them until you sell the home and the statute of limitations closes on that year’s return.
- For energy credits: Form 5695, manufacturer certification statements confirming the equipment meets Department of Energy standards, and receipts showing total installed cost.12Internal Revenue Service. Form 5695 (2021) – Residential Energy Credits
- For medical modifications: a physician’s written recommendation, contractor invoices, and a before-and-after appraisal if the project is large enough that home value might rise.
- For a home office: a floor plan or measurement of the dedicated space, plus receipts for any office-specific improvements.
- For rental property: invoices and receipts organized by property, plus the placed-in-service date for each improvement, since the depreciation clock starts there.