On a jointly owned rental property, you split the rental income according to each owner’s legal ownership percentage on the deed. A 60/40 tenancy in common means the majority owner reports 60% of the rent and deducts 60% of the expenses; the minority owner reports and deducts the other 40%. The split holds even if one person collects every rent check and writes every expense check. The same percentage governs depreciation and, when the property is sold, gain or loss. Allocating any other way without the right legal structure can draw an IRS accuracy-related penalty of 20% on any resulting underpayment.
The Deed Sets the Split
The form of co-ownership on the deed is what controls the percentages, so start there before touching a tax return.
Tenancy in common allows unequal shares. One owner can hold 70%, another 30%, and those exact percentages drive the tax reporting. This is the most flexible structure for investment properties because the ownership ratio can match each person’s actual capital contribution.
Joint tenancy requires equal shares across all owners. Two joint tenants each own 50%; three each own a third. Income and expenses split evenly, by definition.
Tenancy by the entirety, available only to married couples in certain states, works like joint tenancy with an added layer of creditor protection. The split is 50/50. If the couple files jointly, the split is academic because both halves land on the same return.
What Gets Split by That Percentage
The ownership ratio is a single number, and it applies to every financial line item the property produces.
Gross Income
Every dollar the property brings in gets divided by ownership percentage. That includes base rent, late fees, pet deposits kept because of damage, application fees, and forfeited security deposits. If a property generates $30,000 in a year under a 60/40 tenancy in common, the majority owner reports $18,000 and the minority owner reports $12,000. Who physically deposits the checks is irrelevant.
Operating Expenses
Deductible expenses follow the same ratio even when one owner pays all the bills. If the 40% owner writes a check for the full $8,000 insurance premium, that owner still only deducts $3,200. The remaining $4,800 paid on behalf of the 60% owner is treated as a loan or contribution between the co-owners, not as a tax deduction for the one who wrote the check. The same logic applies to mortgage interest, property taxes, repairs, property management fees, and every ordinary expense of the rental.
This is the single most common error on co-owned rentals: one owner deducts the full amount of an expense they paid, rather than only their ownership share.
Depreciation
Residential rental property is depreciated over 27.5 years under MACRS.1Office of the Law Revision Counsel. 26 U.S. Code 168 – Accelerated Cost Recovery System Each owner claims their percentage of the annual depreciation. On a property with a depreciable basis of $275,000, annual depreciation is $10,000; a 60% owner claims $6,000, a 40% owner claims $4,000. Each owner’s basis drops only by the depreciation they personally claimed, which matters later when calculating taxable gain on sale.
How Each Owner Reports It
Most co-owned rentals go on IRS Schedule E, filed with each owner’s Form 1040.2Internal Revenue Service. Topic No. 414, Rental Income and Expenses Each co-owner fills out their own Schedule E showing only their share of income and expenses.3Internal Revenue Service. Instructions for Schedule E (Form 1040) You do not report the full property income and then back out the other owner’s share; you report only your portion from the start.
Co-owners who merely rent out the property and handle normal maintenance do not need an Employer Identification Number. Each owner uses their own Social Security number on their Schedule E. An EIN becomes necessary only if the arrangement is treated as a partnership.
When Co-Ownership Becomes a Partnership
The IRS treats simple co-ownership of a rental as just that: co-ownership, not a partnership. The line is crossed when the owners provide services to tenants beyond what a normal landlord would, such as daily maid service, organized recreation, or meals.4Internal Revenue Service. Understanding Your EIN Routine repairs and occasional maintenance do not trigger partnership treatment.
Once the arrangement is a partnership, the owners file Form 1065.5Internal Revenue Service. U.S. Return of Partnership Income (Form 1065) The partnership itself pays no income tax; it issues each owner a Schedule K-1 showing their allocated share, which the owner then reports on their personal return. The paperwork and cost increase, but the partnership structure also opens the door to special allocations that differ from strict ownership percentages.
Can You Split the Income Differently Than the Deed?
Co-owners often want a split that does not match ownership shares. Maybe one partner handles all the management work, or one contributed cash while the other contributed sweat equity. The IRS will respect a non-proportional split only inside a formal partnership that meets the substantial economic effect rules of IRC ยง704.6Office of the Law Revision Counsel. 26 U.S. Code 704 – Partners Distributive Share
In practice, the partnership agreement must genuinely shift each partner’s economic position. If the 40% owner is allocated 60% of the income, that owner’s capital account must reflect the shift, and the allocation must have real consequences beyond cutting a tax bill. Allocations designed purely for tax savings get reclassified according to each partner’s actual economic interest.
Co-owners who report on Schedule E instead have no such mechanism. Schedule E has no way to allocate income differently from ownership percentage, and reporting a split that does not match the deed is an audit flag.
Married Couples
Spouses who file jointly and co-own a rental have the simplest path: all income and expenses go on a single Schedule E with the joint Form 1040. The split between spouses is irrelevant because both shares land on the same return. Spouses who file separately each report their own share on their own Schedule E, under the same rules as any other co-owners.
The Qualified Joint Venture Election
Spouses who jointly own and operate a rental can elect to treat it as a qualified joint venture rather than a partnership. The election is available in every state, not only community property states, as long as both spouses are the only owners, both materially participate, and the property is not held through an LLC or other state-law entity.7Internal Revenue Service. Election for Married Couples Unincorporated Businesses Each spouse lists their share as a separate property on Schedule E, which avoids the need to file Form 1065.3Internal Revenue Service. Instructions for Schedule E (Form 1040)
The IRS notes that rental real estate income generally remains passive even when the material participation standard is met, so the qualified joint venture election does not change the passive character of the income.7Internal Revenue Service. Election for Married Couples Unincorporated Businesses
Community Property LLCs
Spouses in community property states have an additional option. Under Revenue Procedure 2002-69, a rental held in an LLC that is wholly owned by both spouses as community property can be treated as either a disregarded entity or a partnership for federal tax purposes. The qualified joint venture election does not apply when a property is held through an LLC, and this revenue procedure fills that gap in community property states.
Unequal Contributions and the Gift Tax Trap
Matching the deed to actual money contributed matters beyond allocating deductions. When one co-owner puts up more cash but takes title in equal shares, the IRS can treat the difference as a gift. If a parent pays 80% of the purchase price but takes title as a 50/50 joint tenant with their child, the parent has effectively gifted the child 30% of the property’s value. A gift is any transfer where you do not receive full value in return.8Internal Revenue Service. Frequently Asked Questions on Gift Taxes
In 2026, the annual gift tax exclusion is $19,000 per recipient.8Internal Revenue Service. Frequently Asked Questions on Gift Taxes Amounts above that eat into the lifetime unified exemption, which is $15 million per individual in 2026. Few people owe actual gift tax, but you still have to file Form 709 for any gift above the annual exclusion.
The cleaner approach is to use a tenancy in common with percentages that match the money each person actually contributed. A 70/30 split on the deed avoids the gift issue entirely and gives each owner a deduction that reflects their real investment.
Passive Loss Limits and NIIT Apply Per Owner
Rental income is passive income, so losses from the rental generally cannot offset wages or business profits. This surprises many co-owners in the early years when depreciation produces paper losses. If you actively participate in managing the rental, you can deduct up to $25,000 of rental losses against nonpassive income each year.9Office of the Law Revision Counsel. 26 U.S. Code 469 – Passive Activity Losses and Credits Limited Active participation means approving tenants, setting rent, and authorizing repairs; you must own at least 10% by value to qualify. The $25,000 allowance phases out between $100,000 and $150,000 of modified AGI.10Internal Revenue Service. Instructions for Form 8582 – Passive Activity Loss Limitations
Each co-owner applies these rules independently. Your co-owner’s AGI does not affect your allowance, and your co-owner’s passive activities do not pool with yours. You file your own Form 8582 and track your own losses.11Internal Revenue Service. About Form 8582 – Passive Activity Loss Limitations
High earners also face the 3.8% Net Investment Income Tax on their share of rental income once modified AGI tops $200,000 single, $250,000 joint, or $125,000 married filing separately.12Internal Revenue Service. Questions and Answers on the Net Investment Income Tax One owner can be hit with NIIT on their share while the other is not, which can shift the after-tax economics between co-owners who otherwise look identical on paper.
Penalties for Getting It Wrong
Misallocating rental income is not something the IRS tends to overlook. If one owner claims more than their share of expenses or understates their share of income, and the mistake creates an underpayment, the IRS can impose a 20% accuracy-related penalty on the underpayment.13Office of the Law Revision Counsel. 26 U.S. Code 6662 – Imposition of Accuracy-Related Penalty The penalty reaches negligence, which includes failing to keep adequate records or failing to make a reasonable effort to report correctly.
The penalty does not apply if you acted with reasonable cause and in good faith. Keep a clear written record of the ownership percentages, maintain receipts of who paid what, and reconcile payments between co-owners each year. If one co-owner is covering more than their share of expenses, document those payments as loans or contributions between the owners rather than deducting them on the wrong return.