A negative capital account on a final K-1 almost always means you will report a taxable gain this year, even if no cash changed hands. The negative number in Box L is a signal that over the life of the partnership you pulled out more value — through distributions and allocated losses — than you put in, and the partnership’s debt was quietly holding up your tax basis. When your interest is liquidated, that debt goes away, and the tax code treats the disappearance as cash paid to you.
What the Negative Number Is Telling You
Your capital account tracks your equity in the partnership. Contributions and allocated income push it up; distributions and allocated losses pull it down. A negative balance means the second column has outrun the first.1Internal Revenue Service. 2020 Instructions for Form 1065 – U.S. Return of Partnership Income
That is not, by itself, a problem. Partnerships are designed to let this happen, because your share of partnership debt is added to your outside basis under Section 752 and is treated as a cash contribution you made.2Office of the Law Revision Counsel. 26 USC 752 Treatment of Certain Liabilities Debt-inflated basis is what let you deduct losses and take distributions tax-free in earlier years past what your capital account alone would have supported. The capital account went red; the outside basis stayed above water because liabilities were doing the work.
The bill comes due when your interest ends.
Why the Final K-1 Triggers a Gain
When your partnership interest is liquidated, you are no longer on the hook for your share of the partnership’s debt. Section 752(b) treats that relief as if the partnership handed you cash equal to the debt you no longer carry.2Office of the Law Revision Counsel. 26 USC 752 Treatment of Certain Liabilities That deemed distribution is what turns a negative capital account into a real tax event.
The math is straightforward. Add any actual cash you receive to the deemed cash from liability relief. If the total exceeds your outside basis immediately before liquidation, Section 731 requires you to recognize gain on the excess.3Office of the Law Revision Counsel. 26 US Code 731 – Extent of Recognition of Gain or Loss on Distribution
A worked example. A partner has an outside basis of $10,000, ground down over the years by distributions and losses, but is still carrying $100,000 in allocated partnership debt. On liquidation, the $100,000 of debt relief becomes a deemed cash distribution. The partner has a $100,000 total distribution against a $10,000 basis, producing $90,000 of recognized gain. The negative capital account was the warning: liabilities were carrying the basis, and once they vanished, so did what they created.
How Much Is Capital Gain and How Much Is Ordinary Income
Under Section 741, gain from the sale or exchange of a partnership interest is capital gain by default.4Office of the Law Revision Counsel. 26 US Code 741 – Recognition and Character of Gain or Loss on Sale or Exchange Two carve-outs can push part of the gain into higher-tax categories.
Hot Assets Under Section 751
Section 751 identifies the partnership’s “hot assets,” primarily uncollected accounts receivable and inventory that would produce ordinary income if the partnership sold them directly.5Office of the Law Revision Counsel. 26 USC 751 Unrealized Receivables and Inventory Items Your share of the gain tied to those assets is reclassified as ordinary income and taxed at your regular marginal rate. The partnership reports the amount on Schedule K-1 in Box 20 under Code AB.6Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) (2025)
Unrecaptured Section 1250 Gain
If the partnership held depreciable real estate, a slice of your gain may be unrecaptured Section 1250 gain, reflecting depreciation the partnership previously claimed. That slice is taxed at a maximum rate of 25% under Section 1(h)(7). It appears in Box 20 under Code AD.6Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) (2025) In real estate partnerships that have been depreciating property for many years, this piece can be surprisingly large.
Retiring From a Service Partnership
If your final K-1 comes from retiring rather than the whole partnership dissolving, Section 736 splits liquidating payments into payments for your share of partnership property, taxed under the normal distribution rules, and everything else, taxed as ordinary income (either a guaranteed payment or a distributive share).7Office of the Law Revision Counsel. 26 US Code 736 – Payments to a Retiring Partner or a Deceased Partner’s Successor in Interest
The rule bites hardest in service partnerships — law firms, medical practices, consulting shops — where capital is not a material income-producing factor. There, payments for unrealized receivables and (unless the agreement specifically provides for goodwill payments) goodwill are treated as ordinary income under Section 736(a).7Office of the Law Revision Counsel. 26 US Code 736 – Payments to a Retiring Partner or a Deceased Partner’s Successor in Interest The provision applies only to general partners where capital is not the main income driver, so most real estate and investment fund partners will not see it.
Could You Owe Cash Back to the Partnership
A negative capital account can create more than a tax bill. Some partnership agreements include a deficit restoration obligation, which requires any partner ending with a negative capital account to contribute enough cash at liquidation to bring the balance back to zero. Treasury regulations under Section 704(b) govern how these obligations affect allocations and whether they are treated as enforceable for tax purposes.
Read your agreement before the final return is filed. If it includes a deficit restoration obligation, you may owe the partnership real money on top of the tax hit. If it does not, the negative balance simply feeds the gain calculation above. Either way, the liquidation provisions of the agreement are the first thing to check.
Offsets and Extra Taxes You May Not See on the K-1
Suspended Passive Losses Get Released
If the interest was a passive activity — for limited partners, it almost always was — you may have suspended passive losses that you could not deduct in earlier years. Under Section 469(g), a fully taxable disposition of your entire interest releases those losses and converts them to nonpassive.8Office of the Law Revision Counsel. 26 US Code 469 – Passive Activity Losses and Credits Limited Released losses first offset any other passive income for the year, and any remainder can offset ordinary income, including the liquidation gain itself.9Internal Revenue Service. Topic No. 425, Passive Activities – Losses and Credits
Two limits. Transferring the interest to a related party is not a fully taxable disposition, so the suspended losses stay locked up until that person sells to someone unrelated.8Office of the Law Revision Counsel. 26 US Code 469 – Passive Activity Losses and Credits Limited And suspended passive credits are not released the way losses are.
At-Risk Recapture
Separately, Section 465 limited your loss deductions over the years to your at-risk amount, roughly the money you personally had on the line. If the liquidation drops your at-risk amount below zero because liabilities you counted as at-risk have disappeared, you may have to recapture previously deducted losses as ordinary income on Form 6198.10Internal Revenue Service. Instructions for Form 6198
The 3.8% Net Investment Income Tax
The liquidation gain can also trigger the Net Investment Income Tax, a 3.8% surtax under Section 1411. It applies to the lesser of your net investment income or the amount by which your modified adjusted gross income exceeds $200,000 (single), $250,000 (married filing jointly), or $125,000 (married filing separately). Those thresholds are not indexed for inflation.11Internal Revenue Service. Questions and Answers on the Net Investment Income Tax
Whether your gain counts as net investment income depends on your participation. If you materially participated in the partnership’s business, the gain may escape the surtax. For limited partners and silent investors, it generally will not. On a six-figure gain, 3.8% adds up, and the surtax does not appear anywhere on the K-1 itself.
Where the Numbers Go on Your Return
Before you start, pull the relevant data off the K-1: the ending capital account in Box L, your beginning and ending shares of recourse and nonrecourse liabilities in Box K, and the specific codes in Box 20.12Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) (2025)
The capital gain portion of the liquidation gain goes on Form 8949 — acquisition date, liquidation date, total amount realized (actual cash plus deemed distribution from liability relief), and outside basis.13Internal Revenue Service. Instructions for Form 8949 Those totals flow to Schedule D.
The Section 751 ordinary income amount reported under Box 20, Code AB does not go on Form 8949 or Schedule D. It goes on Part II of Form 4797 as ordinary gain from property that is not a capital asset, then to Form 1040.14Internal Revenue Service. 2025 Instructions for Form 4797 When you fill in Form 8949, reduce your total amount realized by the Section 751 amount so you do not count the ordinary piece twice.
Suspended passive losses released under Section 469(g) route through Form 8582 before landing on the right schedules. At-risk recapture goes on Form 6198. A partnership liquidation typically touches four or five forms working together, which is why the last K-1 is usually the one worth handing to a preparer.