Renting to a Family Member: IRS Rules and Schedule E

Who counts as a "family member" under IRC §280A?

The personal-use-day rule in §280A points to the family definition in IRC §267(c)(4), which covers: your spouse, brothers and sisters (including half-siblings), ancestors (parents, grandparents, great-grandparents), and lineal descendants (children, grandchildren, great-grandchildren).

Notable absences: in-laws, aunts, uncles, nieces, nephews, and cousins are not "family members" under §267(c)(4). Renting to your daughter-in-law or your nephew at below-market rent does not automatically trigger the §280A family rule — although §280A(d)(2)(C) separately treats any day a property is rented to anyone at below-market rent as a personal-use day, regardless of family status. So while the family-member label matters for the strict rule, charging below-market to any person triggers personal-use-day treatment under the broader provision.

For co-owned property, the rule applies through each owner's family. If one co-owner's child uses the property at below-market rent, that day is a personal-use day attributable to both owners. Partnerships and S corporations holding rental property face the same analysis at the entity level, with each owner's family relationships considered.

The fair-market-rent exception: keeping your deductions intact

IRC §280A(d)(3) creates a clean exception: if a family member pays fair market rent, the days they occupy the property count as fair rental days, not personal-use days. You can rent to your college-age child, your parents, or your sibling — and claim full rental deductions including potential losses — as long as the rent equals what an unrelated tenant would pay in the local market.

Three things must be in place for the exception to hold:

1. Actual payment at market rate. The family member must actually pay fair market rent — not receive a discount, partial forgiveness, or an informal reduction. Charging $1,200 when market is $1,800 means every occupied day is a personal-use day, regardless of the written lease amount.
2. A written lease. While §280A does not specifically require a written lease, it is the most effective way to prove the arrangement was at arm's length. Use a standard residential lease form with a market-rate figure and all standard provisions.
3. Documented market comparables. Keep records of comparable rental listings in the area — screenshots from listing sites, a broker's written opinion, or comparable signed leases — that support the rent you charged at the time the lease was executed.

What fair market rent means and how to document it

Fair market rent is the amount an unrelated, willing tenant would pay for the same property in its current condition in the local market. It is not tied to your mortgage payment, your carrying costs, or what you feel is "fair" to the family member. The IRS looks at what comparable properties are actually renting for — not what you need to break even.

Relevant factors in determining fair market rent include:

• Comparable rental listings in the same neighborhood, unit size, and condition
• Actual lease terms (furnished vs. unfurnished, utilities included, parking, pets allowed)
• Local rental market data from property management companies or appraisers
• Recent renewals on comparable units in the same complex or area

Documentation you should retain alongside your Schedule E records:

• Printed or saved screenshots of comparable listings on major rental platforms at the time of lease signing
• A signed lease agreement specifying the term, rent amount, payment date, and tenant obligations
• Bank statements or canceled checks showing actual rent payments received each month
• If the rent is at the lower end of the range, a written note explaining why (older unit, tenant handles certain maintenance, longer lease term)

What "below-market rent" means in practice

Any arrangement where the family member pays less than fair market rent — including paying nothing at all — results in those days being treated as personal-use days. This applies even when you are charging something: a parent who pays $500 per month when comparable units rent for $1,500 is using the property at below-market rent, and all the days they occupy are personal-use days.

The IRS does not apply a "good faith" exception or a small-discount threshold. Any discount from fair market value turns the occupied days into personal use, regardless of how the arrangement is documented or how well-intentioned the discount was. This is a binary rule — either the rent is at market, in which case the §280A(d)(3) exception applies, or it is not, in which case the days are personal use.

One common misconception: some landlords believe that because they are "renting" (as opposed to giving free use), the days must be at least partially fair rental days. That is not how §280A works. The character of the day — rental or personal use — depends entirely on the rent amount relative to fair market value, not on whether any rent is charged at all.

How below-market family rentals affect the 14-day / 10% residence test

Once days are classified as personal-use days, they count toward the residence threshold under §280A(d)(1). The threshold is the greater of 14 days or 10% of fair rental days. Exceeding it converts the property to a "residence" for the year, with two important consequences:

• No net rental loss allowed. You can deduct rental expenses only up to rental income. Any excess expenses are suspended — not carried forward — and lost for that year. This means years of depreciation deductions can effectively disappear.
• IRS expense proration method required. When the property qualifies as a residence, you must use the §280A IRS proration method: rental days ÷ total days of use (rental + personal). This generally allocates less to the rental side than the alternative Tax Court method (rental days ÷ 365), reducing deductible rental expenses further.

For a property with no other personal use, even a short family stay at below-market rent can tip the balance. Consider a beach house rented at market rent for 60 days with one two-week family stay at a reduced rate: 14 personal-use days equals exactly the 14-day threshold. Any additional family use pushes it over and converts the property to residence status for that year, wiping out the ability to deduct a net loss.

The 10% test: if you have only 40 fair rental days, 10% is 4 days. Even 5 personal-use days would trigger residence status because 5 exceeds both 4 (10% test) and is less than 14 — wait, the rule says greater of 14 or 10%. So in that case, the threshold is 14. Five personal-use days would not trigger it. But with 200 fair rental days, 10% is 20 days — exceeding 20 personal-use days (even though it is fewer than 14? No, 20 is more than 14) triggers residence status. The threshold shifts with how many actual rental days you have.

Worked numeric example: fair-market vs. below-market

You own a condo in a beach town. Comparable units rent for $2,000 per month. Your daughter moves in for 6 months (183 days) starting June 1.

Scenario A — Fair market rent ($2,000/month):

• Total rent charged and paid: $2,000 × 6 = $12,000
• Fair rental days: 183 | Personal-use days: 0
• All rental expenses deductible. Any net loss flows through subject to passive-activity rules. No residence classification. Full depreciation deduction available.

Scenario B — Below-market rent ($700/month — a "family discount"):

• Total rent charged: $700 × 6 = $4,200
• Fair rental days: 0 | Personal-use days: 183 (all 183 occupied days are personal use)
• Residence test: 183 personal-use days far exceeds the greater of 14 days or 10% of 0 fair rental days. Property is a residence.
• Deductible rental expenses: limited to $4,200 of rental income. Depreciation, insurance, and mortgage interest in excess of rental income are either itemized personal deductions (mortgage interest, property taxes on Schedule A, subject to SALT and mortgage interest caps) or simply lost. Zero net rental loss. No carryforward.

The difference in tax outcome is substantial. Scenario A allows full depreciation (say $5,000/year) plus other expenses, potentially creating a net rental loss of several thousand dollars that can offset other passive income. Scenario B eliminates the deduction entirely and may cost many thousands in permanently lost depreciation.

Reporting family rental income on Schedule E

Fair-market-rent family rental: Report exactly as you would any other rental. Enter the fair rental days on Schedule E, Part I, and zero personal-use days. Report all rent received as income. Deduct all allowable expenses — mortgage interest, depreciation, insurance, maintenance — in full. Any net loss flows through subject to the passive-activity rules ($25,000 allowance for active participants with MAGI below $100,000, phasing out at $150,000).

Below-market family rental (personal-use days only): You still report rent received as gross income. But expenses must be prorated using the IRS §280A(e) method. Because personal-use days equal or exceed fair rental days in a pure below-market scenario, the rental expense allocation may be severely limited or zero. Property taxes and mortgage interest on the personal-use portion may be deductible as itemized deductions on Schedule A (subject to the SALT cap and mortgage interest rules).

If the property has zero fair rental days for the year — occupied entirely by family at below-market rent — it functions as a personal residence for tax purposes. Report the rent received as ordinary income, but Schedule E may not be applicable for the expense deductions; the property taxes and mortgage interest go to Schedule A instead.

What the IRS looks for: audit triggers in family rental situations

Family rental arrangements attract IRS scrutiny because they are a well-known vehicle for converting personal-use expenses into deductible rental losses. Common red flags:

• Rent significantly below comparable market rates. An examiner familiar with the local market will recognize an unusually low rent immediately, especially for a vacation or resort area property.
• No written lease or informal documentation. A written lease at market rate is the most credible evidence; a handshake arrangement with a child or parent is a red flag that the rent amount was not set at arm's length.
• Rent that tracks the landlord's mortgage payment rather than the market. Charging rent equal to your monthly PITI, regardless of local market rates, signals the arrangement is cost-driven rather than market-driven.
• No actual payment history. Cash transactions with no bank trail are unverifiable and suggest the rent may never have been collected. All rent payments from family members should run through a verifiable channel — check, bank transfer, or payment app — with a consistent monthly pattern.
• Vacation-destination property with zero personal-use days reported. A beach house or mountain cabin where a family member lives is a natural target for auditors who will expect some personal use. Reporting zero personal-use days while a close family member occupies the property is an audit invitation.

The simplest defense is also the simplest practice: charge market rent, use a standard written lease, collect rent by check or bank transfer each month, and keep contemporary listings showing what market rent was when the lease was signed. With that documentation, the arrangement is legally indistinguishable from any third-party tenant relationship.

Frequently asked questions

Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.

Related

• Fair Rental Days on Schedule E: What They Are and How to Count Them
• Personal Use Days on a Rental Property: What Counts and How to Track Them
• Section 280A Rental Loss Limitation: When Vacation Home Deductions Are Capped
• Rental Property Depreciation Calculator