Are Water Bills Tax Deductible for Rental Property?

Yes, water bills are tax deductible for a rental property when you, the landlord, pay them. The IRS treats water and sewer service as a routine utility expense, and you subtract the full amount from your rental income in the year you pay it.¹ The details that trip landlords up are who actually paid the bill, whether the property is fully rented or partly your home, and whether the plumbing work behind the charge was a repair or an upgrade.

Who Gets to Deduct the Bill

The deduction belongs to whoever pays the water company. If the account is in your name and the money comes out of your account, the expense is yours to deduct. If your tenant holds the account and pays the utility directly, you have nothing to deduct and nothing to report.

The middle case is the one that causes trouble. Say the lease doesn’t require the tenant to cover water, but the tenant pays the bill anyway and takes that amount off the rent check. You report the reduced rent plus the water amount as rental income, then deduct the water bill as an expense.² The two numbers cancel out on the return, but leaving the water amount off the income side is the kind of omission that shows up in an audit.

In multi-unit buildings served by a single master meter, some landlords pass the cost to tenants using a ratio based on unit size, occupants, or bedrooms. The landlord still pays the utility, reports tenant reimbursements as rental income, and deducts the full water bill. Whichever allocation formula you use, your records should show how each tenant’s share was calculated.

When You Live in the Property Too

If part of the property is your home and part is rented, only the rental share of the water bill is deductible. Personal water use is never deductible.¹

You need a reasonable way to split the bill. Square footage is one common method: if the rented space is 180 square feet in a 1,800-square-foot home, 10% of the bill is deductible.¹ For water, dividing by the number of people using the service can also be reasonable. Two tenants sharing with two household members would put 50% on the rental side.

Pick one method and use it for the whole tax year. Switching between square footage and occupant count mid-year, especially in the direction that raises the deduction, is the kind of inconsistency that draws scrutiny.

Repairs Deduct Now, Improvements Deduct Over Time

A monthly water bill is a current expense, deducted in full the year you pay it.¹ Water-related work on the property doesn’t always get that treatment. Anything that makes the property better than it was, restores it after major damage, or adapts it to a new use has to be capitalized and depreciated over several years.

Publication 527 puts these plumbing items in the capital-improvement category:¹

Installing or fully replacing a septic system.
Putting in a new water heater rather than repairing the old one.
Adding a water softener or filtration system that wasn’t there before.

A local special assessment to install new water or sewer infrastructure is also capital, added to the property’s basis. Local charges to maintain or repair existing water and sewer systems are deductible.¹

Everyday plumbing work, fixing a leaking faucet, clearing a drain, or replacing a worn valve, is a deductible repair. The working test: fixing something broken is a repair; installing something new or noticeably better is an improvement.

Where the Deduction Goes on Your Return

Rental income and expenses are reported on Schedule E (Form 1040).³ Water and sewer costs go on Line 19, the catch-all for ordinary and necessary expenses not covered by the named lines above it.⁴ Write “Utilities” or “Water/Sewer” as the description and enter the property’s annual total. Each rental you own gets its own column with its own set of expense lines.

The filing deadline for tax year 2025 is April 15, 2026.⁵ An extension moves the filing date to October 15, but any tax you owe is still due April 15.

When the Deduction Doesn’t Cut Your Tax Bill Right Away

Water bills are fully deductible, but the deduction only saves you money when it reduces taxable income. Rental real estate is a passive activity, and passive losses generally can offset only passive income.⁶ Landlords who actively participate in managing the rental can deduct up to $25,000 of rental losses against other income, and that allowance phases out between $100,000 and $150,000 of modified adjusted gross income.⁷

If your rental is already at a loss beyond what the passive rules allow, adding another deductible expense doesn’t lower this year’s tax. It gets carried forward and used in a later year.

Records You Need to Keep

The IRS wants documentation showing the payee, the amount, proof of payment, the date, and a description tying the charge to your rental business.⁸ For water, that means keeping the monthly statements and matching them to bank statements or canceled checks.⁹ Electronic records are fine as long as they contain the same information as paper. Most water utilities let you download annual statements from an online portal.

If you prorate between personal and rental use, keep a short note in your tax file explaining the method. A single line stating that you used a 10% square-footage split is enough. It just has to be reasonable and consistent across the year.

How Long to Hold Onto Them

The general statute of limitations on IRS assessments is three years from the date you filed, extending to six years if you leave off more than 25% of your gross income.¹⁰ For rental property, the IRS advises keeping records related to the property until the statute expires for the year you sell it, because those records feed into depreciation and the gain or loss on sale.¹¹ In practice, that’s the entire ownership period plus three years after the sale.

What Getting It Wrong Costs

Claiming personal water use as a rental expense, or otherwise overstating the deduction, can trigger the accuracy-related penalty. If the error causes a substantial understatement of tax, the penalty is 20% of the underpayment. An understatement is substantial when it’s more than the greater of 10% of the tax that should have been on your return or $5,000.¹²

A single water bill error rarely reaches that line by itself. The risk shows up when several small errors stack, an inflated utility total, a capital improvement treated as a repair, and a tenant reimbursement left out of income. The IRS looks at the return as a whole. Consistent proration and clean records are what keep small choices from turning into a penalty.

1
Internal Revenue Service. Publication 527 (2025), Residential Rental Property
2
Internal Revenue Service. Rental Income and Expenses – Real Estate Tax Tips
3
Internal Revenue Service. About Schedule E (Form 1040), Supplemental Income and Loss
4
Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040)
5
Internal Revenue Service. IRS Opens 2026 Filing Season
6
Office of the Law Revision Counsel. 26 USC 469 – Passive Activity Losses and Credits Limited
7
Internal Revenue Service. Publication 925 (2025), Passive Activity and At-Risk Rules
8
Internal Revenue Service. What Kind of Records Should I Keep
9
Internal Revenue Service. Tips on Rental Real Estate Income, Deductions and Recordkeeping
10
Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection
11
Internal Revenue Service. How Long Should I Keep Records
12
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty