A bathroom remodel is not tax deductible on your personal home in the year you pay for it. Federal tax law treats the project as a capital improvement, so instead of showing up on this year’s return, the cost gets added to your home’s cost basis and reduces the taxable gain whenever you sell. Three situations change that outcome: work done for a documented medical need, a remodel in a rental property, and a renovation tied to a qualifying home office. Each has its own rules.
Why the IRS Calls It an Improvement, Not a Repair
The tax code splits home spending into two buckets. A repair keeps the house working as it already does, like fixing a dripping faucet or regrouting a cracked tile. A capital improvement adds value, extends the property’s useful life, or adapts it to a new use. Tearing out a bathroom and installing new fixtures, plumbing, and flooring is squarely on the improvement side of that line.
Federal law allows no deduction for permanent improvements or betterments that increase a property’s value.1Office of the Law Revision Counsel. 26 U.S. Code 263 – Capital Expenditures The size of the project doesn’t matter. An $8,000 refresh and a $40,000 gut renovation are treated the same way: capitalized, not deducted. Nothing goes on Schedule A, and your adjusted gross income doesn’t move.
How the Money Comes Back When You Sell
Every dollar spent on a qualifying improvement raises your home’s adjusted cost basis. Basis starts with what you paid for the house, plus certain settlement costs, and each improvement stacks on top. Your taxable gain at sale is the sale price minus that accumulated basis.
The IRS lists bathroom additions, plumbing upgrades, and new flooring among the improvements that increase basis, and construction soft costs count too — architect fees, building permits, and contractor payments all qualify.2Internal Revenue Service. Publication 523, Selling Your Home
A concrete example. You bought the house for $350,000 and spent $45,000 on a bathroom renovation. Your adjusted basis is now $395,000. Sell for $650,000 and your gain is $255,000 instead of $300,000. The remodel just cut $45,000 off the gain.
The Section 121 Exclusion
Most homeowners never owe capital gains tax on a sale at all. If you owned and used the home as your principal residence for at least two of the five years before selling, you can exclude up to $250,000 of gain filing single, or $500,000 filing jointly.3Office of the Law Revision Counsel. 26 U.S. Code 121 – Exclusion of Gain From Sale of Principal Residence For many sellers, the exclusion absorbs the full gain and the basis math is academic.
It stops being academic when the home is high-value, held for decades, or sitting in a market that has climbed sharply. Once gain pushes past the exclusion, a documented $45,000 bathroom remodel can save you over $6,000 in federal capital gains tax.
When a Medical-Necessity Remodel Is Deductible Now
One scenario produces an immediate deduction on your personal residence: a remodel that meets a medical need for you, your spouse, or a dependent. The IRS specifically identifies bathroom accessibility work as qualifying, including support bars, grab bars, and railings. Related modifications such as widening doorways, modifying hallways, building entrance ramps, and installing lifts are also listed.4Internal Revenue Service. Publication 502, Medical and Dental Expenses A roll-in shower or a lowered vanity for wheelchair access fits the same category.
Subtract Any Increase in Home Value
The deductible amount isn’t automatically the full project cost. You subtract any increase in the home’s fair market value caused by the improvement, and the remainder is your medical expense.4Internal Revenue Service. Publication 502, Medical and Dental Expenses Many accessibility items — grab bars, support railings, widened doorways — don’t raise market value for a typical buyer, so the full cost qualifies. An elevator usually does add value, so only the excess over that bump counts.
The 7.5% AGI Threshold
Medical expenses are deductible only to the extent they exceed 7.5% of your adjusted gross income.5Office of the Law Revision Counsel. 26 U.S. Code 213 – Medical, Dental, Etc., Expenses With an AGI of $100,000, your total medical costs for the year have to clear $7,500 before any of it reduces taxable income. You also have to itemize on Schedule A rather than take the standard deduction, which only pencils out for taxpayers with substantial medical bills, mortgage interest, or state and local tax to add in. A doctor’s written recommendation for the modifications strengthens the claim if the IRS questions whether the work was medical or cosmetic.
Rental Property Follows Different Rules
Everything shifts when the bathroom belongs to a rental. Genuine repairs are fully deductible in the year you pay for them, and full renovations are recovered through annual depreciation rather than waiting for a sale.
Fixing a running toilet, replacing a broken showerhead, recaulking a tub, or patching damaged tile are repairs. They keep the unit in its existing condition, and the full cost goes on Schedule E for the year the money was spent.6Internal Revenue Service. Topic No. 414, Rental Income and Expenses
A complete bathroom renovation in a rental unit is a capital improvement and must be depreciated. Residential rental property improvements are generally depreciated over 27.5 years using the straight-line method.7Internal Revenue Service. Depreciation and Recapture A $30,000 remodel generates roughly $1,091 in deductions each year for nearly three decades, reducing rental income dollar for dollar along the way.
Plan for recapture at sale. When you sell a rental property, the IRS recaptures the depreciation you claimed (or should have claimed) and taxes that amount at a maximum rate of 25% as unrecaptured Section 1250 gain. Depreciation saves you money annually, but some of that savings is clawed back when you exit.
Home Office Bathrooms
If you use part of your home exclusively and regularly as your principal place of business, improvements tied to that space can generate deductions. “Exclusively” is strict. A bathroom shared between personal and business use doesn’t qualify on its own.
Work affecting only the home office space is depreciated over the applicable recovery period. For improvements that touch the whole house, such as a shared plumbing upgrade, you multiply the cost by your business-use percentage and depreciate that share.8Internal Revenue Service. Publication 587, Business Use of Your Home If the office is 15% of the home’s square footage, 15% of a whole-house plumbing project is a business expense.
One boundary worth stating: home office deductions for employees were eliminated after 2017 and have not been reinstated. Only self-employed people and independent contractors filing Schedule C can take this deduction.
Energy-Efficient Fixtures: No Federal Credit in 2026
If you’ve seen advice about claiming a tax credit for a high-efficiency water heater or energy-saving upgrades installed during a bathroom remodel, that applied through 2025. The Energy Efficient Home Improvement Credit under Section 25C, which offered up to $1,200 per year for qualifying components and up to $2,000 for heat pump water heaters, expired for property placed in service after December 31, 2025.9Office of the Law Revision Counsel. 26 U.S. Code 25C – Energy Efficient Home Improvement Credit As of 2026, no federal credit is available for those components in an existing home. The cost still adds to basis as part of the capital improvement, but the immediate credit is gone.
Keep the Paperwork or Lose the Benefit
A basis increase is only worth something if you can prove it, and the IRS puts that burden entirely on you — sometimes decades after the work was done. For every remodel, keep the signed contract, invoices, proof of payment, building permits, and any architect or designer proposals. Records must be retained until the statute of limitations expires for the tax year in which you sell the property.10Internal Revenue Service. Topic No. 305, Recordkeeping That’s at least three years after filing the return for the year of sale, and six is safer if income was substantially underreported. A dedicated folder for each project, physical or digital, is the difference between a $50,000 basis increase that holds up and one you can’t defend.