Buying Out a Partner: Tax for Both Owners

Is the departing partner's buyout taxable, and is the gain capital or ordinary?

A partner who sells a partnership interest to another owner generally reports gain or loss equal to the amount realized minus adjusted tax basis. The part attributable to unrealized receivables or inventory is ordinary income or loss; the remainder is generally capital gain or loss. These rules also apply to an LLC taxed as a partnership (IRS: Publication 541).

Unrealized receivables include more than unpaid invoices. They can include potential ordinary gain from depreciable assets. The partnership must identify these assets at the transfer date; calling the whole price goodwill does not determine the tax result. The seller reports the sale separately from income allocated on the final Schedule K-1. An installment sale may defer eligible capital gain, but the gain attributable to unrealized receivables or inventory is reported in the sale year (IRS: Publication 541).

If the sale involves those ordinary-income assets, the selling partner must notify the partnership in writing within 30 days of the exchange or, if earlier, by January 15 of the following calendar year. The partnership generally files Form 8308, Parts I–IV, with its timely Form 1065, reports the seller's section 751(a) amount in K-1 box 20, code AB, and provides Parts I–III of Form 8308 to both parties by January 31 after the exchange, or 30 days after notice if later. The seller also attaches a statement to the tax return showing the sale date and ordinary and capital portions of the gain or loss (IRS: Publication 541; Form 8308 instructions). Agree before signing who will supply the asset and basis information needed to complete them.

What changes if the partnership redeems the interest?

When the partnership pays a retiring partner for the entire interest, the payment is a liquidation of that partner's interest, not a sale to another owner. Payments for the partner's interest in partnership property are distributions and do not create a current deduction for the partnership (IRS: Publication 541).

For a redemption, cash and debt relief treated as money can create gain when they exceed the retiring partner's adjusted basis. A disproportionate distribution that exchanges a share of unrealized receivables or substantially appreciated inventory for other property, including cash, may also create ordinary gain under section 751(b), even when cash does not exceed basis. Loss is allowed only under narrower distribution rules. Some payments for unpaid customer work (unrealized receivables) or goodwill are instead taxed as a share of partnership income or an ordinary-income guaranteed payment. The treatment depends on whether capital materially produces income, whether the departing owner was a general partner, and the agreement's goodwill terms. Only a qualifying guaranteed payment may give the partnership a deduction. A retiring owner may remain a partner for tax purposes until the interest is fully liquidated, even when payments continue after departure (IRS: Publication 541; partner K-1 instructions).

How do tax basis and partnership debt change the seller's gain?

Calculate the seller's outside basis on the transfer date, including the seller's share of partnership liabilities and adjustments for income, losses, contributions, and distributions. The capital account on Schedule K-1 is not the same as outside basis (IRS: Publication 541; partner K-1 instructions).

In a direct sale, relief from the seller's share of partnership debt adds to the amount realized, even if the buyer pays no extra cash. That debt may already be part of the seller's basis, so both sides of the calculation matter. In a redemption, the reduction in the retiring partner's debt share is generally treated as a money distribution. Reconcile debt shares immediately before and after the transaction; guarantees and recourse debt can make a simple ownership-based split wrong (IRS: Publication 541).

Can the buyer deduct the price or increase the basis of partnership assets?

If at least two owners remain, the buyer generally includes the price paid and the resulting share of qualifying partnership debt in outside basis, rather than deducting the price as a business expense. Outside basis measures the buyer's tax investment in the interest; it does not itself increase the partnership's depreciation deductions. The partnership's basis in its assets generally stays the same after a direct transfer (IRS: Publication 541).

A continuing partnership can make a section 754 election by attaching its statement to a timely Form 1065, including extensions, to adjust asset basis after an interest transfer or qualifying distribution. If missed, automatic relief may be available when corrected within 12 months of the original election deadline. For a transfer, the section 743(b) adjustment generally affects only the buyer and may change that owner's share of future depreciation or gain; for a distribution, section 734(b) can adjust the partnership's remaining property. The election applies to later transfers and distributions unless revoked, so model its effect before filing. Certain substantial built-in losses or basis reductions require an adjustment even without an election (Form 1065 instructions).

A partner left midyear: what goes on each partnership K-1?

The partnership files Form 1065 and gives a Schedule K-1 to each person who was a partner during the year. Income, gain, loss, and deductions are allocated only for the period each person was a partner; they are not split by the buyout cash. Changing-interest rules generally use an interim closing of the books; ordinary items may be prorated if the partners make a dated written selection, while extraordinary items follow special timing rules (Form 1065 instructions; 26 CFR 1.706-4).

If the buyout leaves one owner in a partnership-taxed LLC, file a final short-period Form 1065 by the 15th day of the third month after termination. The seller still sells a partnership interest, but the buyer is treated as acquiring the seller's share of the LLC's assets; the single-member LLC is then generally disregarded for income tax. See Changing your business structure for the next returns (IRS: Publication 541; Revenue Ruling 99-6; IRS: Publication 3402).

Mark the seller's K-1 final when the entire interest is sold. For a redemption paid over time, first determine when the interest is fully liquidated; the retiring owner can remain a partner for tax purposes and receive later K-1s. Use ownership and liability information immediately before complete disposition, and identify a taxable sale in the K-1 ownership section when applicable. The K-1's income allocation and the seller's gain on the interest are separate calculations (IRS: Publication 541; Schedule K-1 (Form 1065)).

How is a sale or redemption of S corporation shares taxed?

When one shareholder buys another's S corporation shares, the seller generally compares sale proceeds with adjusted stock basis to determine capital gain or loss. The buyer gets basis in the purchased shares; the corporation does not deduct the price as an operating cost. S corporation income and losses, and prior distributions, change stock basis before the sale calculation (IRS: Publication 550).

When the corporation buys back shares, a redemption may be treated as a stock sale or as a distribution. If it qualifies as a sale, the shareholder compares the payment with adjusted stock basis. Otherwise, a nondividend distribution generally reduces stock basis, with any excess taxable as gain; accumulated C corporation earnings and profits can make part a dividend, reported on Form 1099-DIV. Direct and indirect ownership, including certain family-held shares, can affect the redemption test. For a complete redemption blocked by family attribution, the departing shareholder may qualify to waive that attribution by including a section 302(c)(2) statement with the first return for the redemption year; strict interest and 10-year before-and-after rules apply. The corporation does not deduct the buyback price (IRS: Publication 550; IRS: S corporation stock and debt basis; Form 1120-S instructions; 26 CFR 1.302-4).

What goes on the departing S shareholder's final K-1?

An S corporation issues a Schedule K-1 to every person who held shares during the year, including a person who sold all shares midyear. Mark the departing shareholder's K-1 as final. The K-1 reports that person's allocated share of the year's items; the shareholder calculates the separate stock-sale gain or loss using adjusted basis (Schedule K-1 (Form 1120-S); Form 1120-S instructions; IRS: Publication 550).

The usual rule allocates each tax item by shares owned on each day, and the seller is treated as owning shares on the sale day. If the shareholder's entire interest terminates, the corporation can elect under section 1377(a)(2) to treat the year as two periods, using the books at the termination date. The corporation and every affected shareholder, including the seller, must consent, and the election statement goes with a timely original or amended Form 1120-S. This can change both owners' K-1 amounts; a sale agreement alone does not make the election (Form 1120-S instructions).

A shareholder who keeps some shares cannot use that complete-termination election for the sale. A partial sale or exchange-treated redemption of at least 20% of outstanding shares within 30 days may qualify for a separate closing-of-the-books election; every shareholder who held shares during the year must consent, and the corporation attaches a statement to a timely original or amended Form 1120-S (Form 1120-S instructions).

Does a buyout loan make the price deductible?

Borrowing to fund a buyout does not turn the purchase price or redemption payment into a current business deduction. Principal repayment also does not create one. Interest is a separate expense, and its treatment depends on who borrowed and how the loan proceeds were used (IRS: Topic no. 505; Form 1065 instructions).

Keep the loan agreement, bank trail, interest schedule, and closing statement together. A loan to an owner who buys an interest, and a loan to the business that funds a redemption, are different transactions. Trace the proceeds before deciding where any interest belongs on the owner or business return.

Can an owner still owe tax from before the buyout?

Yes. Each partner or S shareholder pays tax on income allocated to them on the year's K-1, even if the business retains the cash (IRS: Partnerships; Form 1120-S instructions). Under sections 6225 and 6226, a partnership subject to centralized audit rules may also owe an imputed underpayment for a year before the buyout. Its representative can instead file Form 8988 within 45 days after the final adjustment notice to push the adjustments to the partners from that audited year, including a former partner; Form 8986 must then reach those partners within 60 days after the adjustment becomes final. An eligible partnership can elect out for a year on Schedule B-2 with its timely Form 1065 (IRS: BBA partnership audit process; IRS: Publication 541).

Leaving also does not erase personal exposure for unpaid payroll withholding from a period when the owner controlled payment decisions. Under section 6672, a responsible partner, LLC member, shareholder, or officer who willfully failed to remit withheld tax can owe a penalty equal to the unpaid withheld amount. The usual assessment period for timely filed employment returns ends three years after the following April 15; a late or missing return can extend it. General partners may also owe the partnership's payroll debt under applicable state partnership law, without the section 6672 willfulness test; LLC members are treated differently under state law (IRS: Employment taxes and the Trust Fund Recovery Penalty; IRS: assessment period; IRS: Collecting from Limited Liability Companies).

What if the IRS responsible party changed?

If the buyout changes the person who controls the business and manages its funds, report the new responsible party to the IRS on Form 8822-B within 60 days. Enter that person's name and tax identification number on lines 8 and 9. An owner, officer, general partner, LLC member manager, or authorized representative signs; a representative attaches a power of attorney. Mail the form to the address listed for the business's old location. A change in ownership alone does not establish that the responsible party changed (IRS: Responsible parties and nominees; Form 8822-B).

Example

Illustrative US dollars; assume a direct sale in a partnership with at least two owners remaining, and no unrealized receivables or inventory.

One partner sells the entire interest for $100,000 cash. At closing, the seller's outside basis is $70,000, including a $20,000 share of partnership debt. The sale relieves the seller of that debt, so the amount realized is $120,000: $100,000 cash plus $20,000 liability relief. The seller's capital gain is $50,000: $120,000 minus $70,000. The buyer's outside basis includes the price paid and the buyer's resulting share of qualifying partnership debt, which need not equal the seller's former $20,000 share. The price is not a current business expense. The partnership allocates income across the ownership change and issues K-1s to everyone who was a partner (IRS: Publication 541; Form 1065 instructions).

Different for you?

• The whole business is being sold: see Selling your business.
• Only one LLC owner will remain: the LLC's federal tax classification and returns may change; see Changing your business structure.
• The departing partner is outside the United States: transfer withholding may apply; see Foreign partners and withholding.
• The company will end: see Closing a company for final returns and accounts.
• The agreement is not signed yet: bring the operating or shareholder agreement, proposed payment terms, prior K-1s, outside or stock basis records, debt and asset schedules, ownership dates, and funding terms to corporate tax review. The payer, asset mix, debt, redemption tests, and elections can materially change the tax result. State tax and entity-law steps also depend on where the business operates and is formed.