A Section 743(b) adjustment on a K-1 is reported across three specific codes: Box 11, Code F for the net positive income adjustment; Box 13, Code V for the net negative income adjustment; and Box 20, Code U for the total basis adjustment, net of cost recovery, broken out by asset group.1Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065) The transferee partner then reports each adjusted item as a separate entry on their personal return, following the instructions for whatever partnership item was adjusted. The adjustment belongs only to the transferee partner, so the numbers on that K-1 will not match what other partners see on theirs.
The Three K-1 Codes That Carry the Adjustment
The adjustment does not appear as a single line on the K-1. Instead, its effects are woven into the specific income, deduction, and gain items it modifies, and three codes tell the partner where to look.1Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065)
Box 11, Code F carries the net positive income adjustment attributable to Section 743(b) basis adjustments. This is where increased depreciation deductions and reductions to allocated gain flow when the transferee paid more for the interest than their share of inside basis.
Box 13, Code V carries the net negative income adjustment. When the adjustment increases the transferee’s taxable income (as a negative basis adjustment does), it lands here.
Box 20, Code U reports the total 743(b) basis adjustment, net of cost recovery, broken out by asset grouping. This is the running balance figure. It shows the partner where their remaining adjustment stands at year end and how it is distributed across the partnership’s asset classes.
The Supplemental Statement
Codes alone are not enough. The partnership should attach a supplemental statement to the K-1 that details how the adjustment was allocated among assets and how it flowed into specific income and deduction items for the year. That statement is the transferee partner’s primary working document at return time. Without it, matching the coded figures to their underlying items becomes guesswork.
Reporting the Adjustment on Your Personal Return
Each adjusted item gets reported as a separate entry on Form 1040 or 1040-SR, and each follows the reporting instructions for the underlying partnership item. If the adjustment modifies depreciation from a trade or business asset, that adjustment goes on Schedule E (Form 1040), line 28, on the same line and using the same instructions as the corresponding Box 1 income or loss from that partnership.1Internal Revenue Service. Partner’s Instructions for Schedule K-1 (Form 1065)
If you receive K-1s from more than one partnership, report each partnership’s items on a separate line 28 of Schedule E. Do not combine them.
When You Think the Partnership Got It Wrong
If you believe the partnership reported the adjustment incorrectly, file Form 8082 (Notice of Inconsistent Treatment) with your return, prepare the return using the amounts you believe are correct, and check the appropriate box on the form to alert the IRS to the inconsistency.2Internal Revenue Service. Instructions for Form 8082 Filing inconsistently without Form 8082 can trigger penalties, so this is not a step to skip when you and the partnership disagree.
How the Adjustment Flows Year to Year
A 743(b) adjustment is not a one-time entry. It creates a separate basis layer that lives only for the transferee partner and works through the K-1 for years, sometimes more than a decade.3eCFR. 26 CFR 1.743-1 – Optional Adjustment to Basis of Partnership Property
For depreciable tangible property, the portion of the adjustment allocated to that asset is treated as a separate asset and depreciated over the remaining recovery period of the original property. A $50,000 positive adjustment allocated to a seven-year MACRS asset with three years of recovery remaining is recovered over those three years, not over a fresh seven-year period.
Goodwill and other Section 197 intangibles work differently. A 743(b) adjustment allocated to a Section 197 intangible is treated as a separate intangible asset and amortized over a new 15-year period starting from the date of the transfer, regardless of how long the partnership has held the underlying intangible.4eCFR. 26 CFR 1.197-2 – Amortization of Goodwill and Certain Other Intangibles
When the partnership sells an asset carrying a 743(b) adjustment, any unamortized balance allocated to that asset offsets the transferee partner’s share of the gain or loss. A positive unamortized balance reduces the partner’s gain; a negative balance increases it. The K-1 that year will reflect this through the same coded boxes.
When the partner eventually sells the partnership interest, any remaining unamortized 743(b) adjustment factors into the gain or loss calculation on the sale. A remaining positive adjustment reduces taxable gain or increases loss; a remaining negative adjustment does the opposite.
When the Adjustment Applies at All
A K-1 will only carry Section 743(b) figures if one of two conditions was met at the time of the transfer that gave you the interest.
The first is a Section 754 election in effect at the partnership level. The partnership makes this election on a timely filed return and, once made, it applies to every future transfer and distribution for as long as the partnership exists. It cannot be revoked without the Commissioner’s permission.5Internal Revenue Service. FAQs for Internal Revenue Code (IRC) Sec. 754 Election and Revocation
The second is a mandatory adjustment triggered by a substantial built-in loss immediately after the transfer. Since the Tax Cuts and Jobs Act of 2017, either of two tests can trip this:6Internal Revenue Service. Questions and Answers About the Substantial Built-In Loss Changes Under Internal Revenue Code (IRC) Section 743
- The partnership’s total adjusted basis in all its property exceeds total fair market value by more than $250,000, or
- The transferee partner would be allocated a net loss of more than $250,000 if the partnership hypothetically sold all its assets for fair market value immediately after the transfer.
The triggering events are a sale or exchange of a partnership interest and a transfer at a partner’s death. Gifts of partnership interests generally do not trigger the adjustment; a part-sale, part-gift transaction can produce a partial adjustment only on the portion treated as a sale.7Office of the Law Revision Counsel. 26 USC 743 – Special Rules Where Section 754 Election or Substantial Built-In Loss
If none of these conditions applies to your transfer, expect a K-1 with no Code F, Code V, or Code U entries tied to 743(b).
What Section 743(b) Is Doing to Your Numbers
Before you file, it helps to understand what the codes are actually correcting. When you bought or inherited the partnership interest, what you paid (or the stepped-up value at death) almost never matched your proportionate share of the partnership’s tax basis in its assets. Section 743(b) closes that gap with a basis adjustment applied only to you.7Office of the Law Revision Counsel. 26 USC 743 – Special Rules Where Section 754 Election or Substantial Built-In Loss
Take a partnership holding land with a $100,000 tax basis and a $500,000 fair market value. A new partner buys a 25% interest for $125,000. That partner’s share of the inside basis is only $25,000, but they paid $125,000. Without a 743(b) adjustment, the partnership would eventually allocate $100,000 of built-in gain to the new partner on the eventual sale of the land, even though the partner already paid for that appreciation. The $100,000 positive adjustment prevents the double-counting, and shows up on the K-1 through the codes above once the land is sold or as depreciation flows if the asset were depreciable.
The adjustment runs in both directions. If the transferee paid less than their share of inside basis, the adjustment is negative and increases the partner’s share of taxable gain or reduces deductions over time. Other partners’ K-1s are unaffected.3eCFR. 26 CFR 1.743-1 – Optional Adjustment to Basis of Partnership Property
Penalties for Reporting Errors
An incorrect 743(b) calculation that produces an underpayment on your return can trigger the accuracy-related penalty of 20% of the underpayment when the underpayment results from negligence, disregard of rules, or a substantial understatement of income tax. If the error involves a gross valuation misstatement, the penalty doubles to 40%.8Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments Because 743(b) adjustments turn on asset valuations, a large valuation error is exactly the type of mistake that reaches the higher tier.
At the partnership level, an incomplete or late return that fails to properly report mandatory basis adjustments carries a penalty of $255 per partner per month for up to 12 months.9Internal Revenue Service. Failure to File Penalty
Records to Keep
Keep records related to property until the statute of limitations expires for the tax year in which you dispose of the property.10Internal Revenue Service. Starting a Business and Keeping Records For 743(b) adjustments, hold onto the original valuation documentation, the partnership’s allocation schedule, and the annual amortization records for as long as you hold the interest and continue to benefit from the adjustment, plus at least three years after filing the return for the year the last affected asset is sold or the partnership interest is disposed of. The three-year window stretches to six years if unreported income exceeds 25% of gross income, and it never closes if a return was fraudulent or never filed. Given that a single adjustment can run through a decade or more of K-1s, the safe move is to keep everything until well after you have fully exited the partnership.