If you pay for partnership business costs out of your own pocket and never get paid back, you can deduct those unreimbursed partnership expenses on Schedule E of your Form 1040, but only when the partnership agreement required you to cover them. The deduction, labeled “UPE” on the return, reduces both your ordinary income from the partnership and your self-employment tax. The same treatment applies to members of a multi-member LLC taxed as a partnership.
The Three-Part Qualification Test
An expense has to clear three bars before it becomes a deductible UPE. It must be ordinary and necessary for the partnership’s business under Internal Revenue Code Section 162, meaning the kind of cost that is common and helpful in your line of work.1Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses You must have paid it with your own money. And the partnership must not have reimbursed you for it.
That third requirement is sharper than it looks. If the partnership agreement entitled you to reimbursement and you simply never submitted the receipt, you cannot deduct the expense. The IRS treats a reimbursable-but-unclaimed expense as a voluntary outlay, not a deductible business cost. Only costs you were expected to pay yourself under the agreement qualify.
Because partners are self-employed for tax purposes, UPEs are not treated like the old employee business expense deduction. The Tax Cuts and Jobs Act suspended miscellaneous itemized deductions for employees through 2025, so W-2 workers generally cannot deduct unreimbursed job costs at all. Partners face no such restriction, and the UPE reduces partnership income directly on Schedule E rather than passing through Schedule A.2Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040)
Why the Partnership Agreement Is the Hinge
Most UPE deductions live or die here. The IRS requires that the partnership agreement, operating agreement, or a formal written policy obligated you to pay the expense. A handshake understanding or informal expectation among partners is not enough. Revenue Ruling 70-253 established the principle that a partner must show a binding legal obligation to bear the cost, and the IRS has enforced that position consistently.
The Schedule E instructions state it plainly: you can deduct unreimbursed ordinary and necessary partnership expenses “if you were required to pay these expenses under the partnership agreement.”2Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040) If the agreement is silent on who bears a particular category of expense, the deduction will almost certainly fail under audit.
The clause itself does not need to be elaborate. Language stating that each partner is responsible for their own business travel, a resolution requiring partners to maintain professional licenses at their own cost, or a written policy assigning vehicle expenses to individual partners all satisfy the requirement. What matters is that the obligation exists in writing before the expense is incurred. Vague references to partners “covering their own costs” invite disputes; list the expense categories explicitly.
Which Expenses Qualify
The most commonly claimed UPEs trace back to partnership operations rather than personal life.
- Vehicle expenses. Business mileage can be claimed at the IRS standard mileage rate of 72.5 cents per mile for 2026, or you can track actual costs like fuel, insurance, and depreciation. Commuting between home and a regular office does not count.3Internal Revenue Service. 2026 Standard Mileage Rates
- Travel and lodging. Airfare, hotels, and meals (subject to the 50% limit) for partnership business trips you paid for yourself.
- Home office. A proportional share of housing costs if you use part of your home exclusively and regularly as your principal place of business for the partnership, or as a space where you regularly meet clients.4Internal Revenue Service. Topic No. 509, Business Use of Home
- Professional development. Licensing fees, continuing education required to keep professional credentials, and mandatory dues.
- Supplies and equipment. Software, tools, or materials you bought for partnership work that the firm did not pay for.
Health Insurance Is Not a UPE
Partners who pay their own health insurance premiums get a deduction, but it goes elsewhere. Claim it as the self-employed health insurance deduction on Schedule 1 of Form 1040. That is an above-the-line adjustment, actually more favorable than a UPE because it reduces adjusted gross income regardless of partnership income limits.5Internal Revenue Service. 2025 Instructions for Form 7206 – Self-Employed Health Insurance Deduction Premiums beyond what Schedule 1 allows can still be included as medical expenses on Schedule A if you itemize.
Three Limits That Can Restrict the Deduction
Even after an expense qualifies, three loss-limitation rules can reduce or defer the amount you actually deduct. They apply in order, and each one filters what passes through to the next.
Basis Limitation
Under Section 704(d), you cannot deduct partnership losses (including UPEs) that exceed your adjusted basis in the partnership at year end.6Office of the Law Revision Counsel. 26 USC 704 – Partners Distributive Share Basis starts with what you contributed, rises with your share of income and additional contributions, and falls with distributions and prior losses. Anything a UPE pushes past your basis is suspended and becomes deductible in a later year when basis recovers.
At-Risk Limitation
Section 465 adds a second ceiling: you can only deduct losses up to the amount you personally have at risk in the activity.7Office of the Law Revision Counsel. 26 USC 465 – Deductions Limited to Amount at Risk The at-risk amount generally tracks basis but excludes non-recourse debt where you have no personal liability. Any UPE blocked here carries forward to the first year your at-risk amount rises enough to absorb it.
Passive Activity Loss Limitation
Section 469 prevents losses from passive activities from offsetting non-passive income like wages or active business profits.8Office of the Law Revision Counsel. 26 USC 469 – Passive Activity Losses and Credits Limited A partnership activity is passive unless you materially participate. The most common way to prove material participation is logging more than 500 hours in the activity during the year, though other tests exist.
If UPEs create or increase a passive loss, that loss is suspended until you either earn passive income from other sources or dispose of your entire partnership interest in a taxable transaction. Partners who work full-time in the partnership usually clear the participation hurdle easily; limited partners and passive investors are the ones most likely to hit this wall.
How UPEs Affect Self-Employment Tax and QBI
For general partners, UPEs reduce net earnings from self-employment on Schedule SE. The IRS instructions direct general partners to reduce the amount from Schedule K-1 box 14, code A, by these expenses before entering it on the form.9Internal Revenue Service. Instructions for Schedule SE (Form 1040) Because SE tax runs 15.3% on the first $176,100 of net SE earnings for 2025 and 2.9% above that, UPEs effectively save 15.3 cents per deducted dollar below the wage base on top of income tax savings.
The Section 199A qualified business income deduction, now permanent after the One Big Beautiful Bill Act removed its original sunset, lets eligible partners deduct up to 20% of qualified business income. UPEs reduce your QBI, which shrinks the 199A deduction. Claim $10,000 in UPEs and your QBI drops $10,000, cutting the 199A benefit by up to $2,000. The trade is still favorable in most cases, because the UPE saves a full dollar of income and SE tax per dollar deducted while the QBI deduction only saves 20 cents, but a smaller QBI figure on the return should not come as a surprise.
How to Report UPEs on Schedule E
After the basis, at-risk, and passive activity limits are applied, report the allowable UPE amount on Schedule E, Part II (line 28) of Form 1040. The IRS instructions are specific about formatting:2Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040)
- Column (a): enter “UPE” as the description.
- Column (i): enter the expense amount here if the partnership activity is nonpassive.
- Column (g): use this column instead if the activity is passive and you are not required to file Form 8582.
Put the UPE on its own line. Do not combine or net it against other amounts from the partnership. If Form 8582 is required because the passive activity rules limit your deduction, report the UPE through that form rather than directly on Schedule E.
Attach a statement itemizing each expense: the type, the amount, and a reference to the clause in the partnership agreement or written policy that required you to pay it. That statement is your first line of defense if the IRS questions the deduction.
Records to Keep
The substantiation rules for business expenses are unforgiving, and the old Cohan rule of estimating costs does not apply to travel, vehicle, or entertainment expenses.10eCFR. 26 CFR 1.274-5A – Substantiation Requirements You need contemporaneous records: notes made at or near the time you spent the money.
For every expense, capture four elements: the amount, the date, the place or description, and the business purpose. Documentary evidence such as receipts and paid invoices is required for any lodging expense and for any other expense of $25 or more. A credit card statement showing a charge helps but is not enough on its own because it typically lacks the business purpose.
Vehicle Expense Records
If you claim vehicle expenses, whether at the standard mileage rate or using actual costs, keep a mileage log with each business trip’s date, destination, business purpose, and odometer readings at the start and end.11Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses Total miles for the year matter too, so the IRS can verify business-use percentage. A GPS app is the easiest way to build this record, but a handwritten log works if entries are made promptly.
Keep the Partnership Agreement Accessible
The single most important document is the partnership agreement itself. If an auditor asks why you paid an expense out of pocket, your answer needs to point to a specific provision. Keep a current, signed copy with your tax records for every year you claim UPEs. If the agreement was amended to add the expense obligation, keep both the original and the amendment so the timeline is clear.