Rent from a roommate is taxable income only to the extent it exceeds that roommate’s fair share of your household expenses. If the money coming in just covers their portion of rent, utilities, and other real costs, the IRS treats it as expense-sharing and you owe nothing. Charge above that line, and the excess is rental income you have to report. So the honest answer to whether roommate rent is taxable income is: sometimes, and the math decides.
The Profit Test
The IRS looks at economic reality, not labels. If your roommate pays $800 a month and their share of rent, utilities, and insurance works out to $750, that extra $50 is income.1Internal Revenue Service. Topic No. 414, Rental Income and Expenses If they pay exactly $750, or less, nothing about that transaction is taxable. You are simply being reimbursed for money you already spent on the household.
This works the same way whether you own the home or lease it and sublet a room, and it applies whether or not you have a written agreement with your roommate. What matters is whether money came in that exceeded your costs.
Figuring Your Roommate’s Fair Share
Start with the full year of housing costs that benefit everyone in the home. That generally includes:
- Rent, or mortgage interest and property taxes if you own
- Utilities such as electricity, water, gas, and internet
- Homeowners or renters insurance
- Routine maintenance that keeps the place functional
Then divide by a reasonable method. Splitting by number of occupants is the simplest: two people in a home with $24,000 in annual costs means each person’s share is $12,000. A roommate paying $1,000 a month generated no profit. You can also allocate by square footage or by rooms, treating the roommate’s private space as a percentage of the total. Pick a method that reflects how the space is actually used and stick with it, because the same allocation determines what you can deduct if rental income does exist.
“Real expenses” means what you actually paid. Rounded-up estimates or padded numbers to make the math come out even will not hold up if the return is questioned.
Reporting Roommate Rent When It Is Taxable
Once payments exceed the roommate’s share, you report the full amount of rent received on Schedule E (Form 1040), then deduct the expenses allocated to the rented portion on the same form.2Internal Revenue Service. About Schedule E (Form 1040), Supplemental Income and Loss The difference is your taxable profit.
Two things worth knowing before you file. First, this kind of rental income is almost never subject to self-employment tax. That tax kicks in when you provide substantial services to an occupant, like daily housekeeping or prepared meals, which a normal roommate arrangement does not involve. Second, because you also live in the home, your deductions for the rental portion cannot exceed the rent you collected. Federal law caps them at gross rental income when the dwelling is your residence.3Office of the Law Revision Counsel. 26 U.S. Code 280A – Disallowance of Certain Expenses in Connection With Business Use of Home, Etc. You can’t use a roommate rental to create a loss that shelters your salary. Deductions you can’t use in the current year carry forward.
Depreciation and Why It Matters Even Later
If you own the home and part of it is rented, you are expected to depreciate the rental portion of the building over 27.5 years.4Internal Revenue Service. Publication 527 (2025), Residential Rental Property Depreciation reduces your taxable rental income each year, which sounds like a benefit you can choose to skip. It isn’t.
When you sell the home, the IRS reduces your tax basis by the depreciation you were entitled to take, whether you actually claimed it or not.5Internal Revenue Service. Publication 946 (2025), How To Depreciate Property Skip the deduction and you get no annual benefit, but you still owe the tax on it later. Claim it and at least you get the yearly deduction to offset the eventual bill.
This connects directly to the home-sale exclusion. Normally you can exclude up to $250,000 of gain on your primary residence, or $500,000 if married filing jointly, provided you owned and lived in the home for at least two of the five years before selling.6Office of the Law Revision Counsel. 26 USC 121 – Exclusion of Gain From Sale of Principal Residence The exclusion does not cover gain equal to depreciation claimed or allowable after May 6, 1997. That amount is recaptured and taxed at a flat 25% rate.7eCFR. 26 CFR 1.121-1 – Exclusion of Gain From Sale or Exchange of a Principal Residence So $12,000 of depreciation across several roommate years produces a $3,000 recapture bill at sale, even if the rest of your gain is fully excluded.
Payment Apps and Form 1099-K
Most roommates send rent through Venmo, PayPal, Zelle, or a similar service. If one of those platforms issues you a Form 1099-K, that does not by itself mean the money is taxable. A 1099-K just reports total payment volume. The current reporting threshold for third-party payment networks is $20,000 in gross payments and more than 200 transactions in a calendar year.8Internal Revenue Service. Treasury, IRS Issue Proposed Regulations Reflecting Changes From the One, Big, Beautiful Bill to the Threshold for Backup Withholding on Certain Payments Made Through Third Parties
If a 1099-K you receive includes nontaxable expense-sharing payments, you still need to account for it on your return so IRS matching doesn’t flag it. The standard fix is to report the 1099-K amount and back out the nontaxable portion with a labeled adjustment on Schedule 1. Payment app memos that say “May rent share” or “utilities,” plus screenshots of the underlying bills, are what let you defend that adjustment.
Security Deposits
A refundable security deposit is not income when your roommate hands it over. It becomes income only if you end up keeping some or all of it, and you report the kept portion in the year you keep it.4Internal Revenue Service. Publication 527 (2025), Residential Rental Property
There’s one exception. If the payment is labeled as the last month’s rent rather than a refundable deposit, the IRS treats it as advance rent and you report it in the year you receive it, not the year it gets applied.1Internal Revenue Service. Topic No. 414, Rental Income and Expenses The label matters.
What Happens If You Don’t Report
Failing to report rental profit can trigger an accuracy-related penalty of 20% on the underpayment, on top of the tax owed.9Internal Revenue Service. Accuracy-Related Penalty Interest runs on both the tax and the penalty from the original due date.
Small amounts do sometimes go unnoticed. But a 1099-K from a payment platform, or a roommate who deducts rent on their own return, can surface the income years down the line. Filing an amended return before the IRS contacts you almost always turns out better than waiting for a notice.
Records to Keep
Documentation is what carries you through an audit whether your arrangement is pure expense-sharing or actually generates income. The IRS expects you to substantiate both sides with receipts, canceled checks, bank statements, or bills.10Internal Revenue Service. Tips on Rental Real Estate Income, Deductions and Recordkeeping
Keep a running total of housing expenses, a record of every payment your roommate makes with a clear memo, and the calculation showing how you split things. If nothing was taxable, that file is what proves it. If something was, the same file supports your Schedule E. Hold everything for at least three years after filing, and longer if you own the home and are depreciating the rental portion.