Tax Planning & Concepts
Schedule K-3 Explained: International Items on a K-1
Schedule K-3 is the form a partnership or S corporation uses to report each owner’s share of international tax items, the detail a partner needs to claim the foreign tax credit, calculate GILTI, or complete other cross-border filings. It is an extension of Schedule K-1: the K-1 shows your share of ordinary income, while the K-3 breaks out the foreign-source pieces. The IRS introduced Schedules K-2 and K-3 for tax year 2021 to replace the loosely formatted footnotes that used to carry this information.
If you received a K-1 with a box checked for K-3, or a notice saying a K-3 is available on request, this guide explains what the form contains, when a business can skip it, and how the numbers move to your Form 1116.
What Schedule K-3 is and how it differs from Schedule K-1
Schedule K-3 reports a partner’s or shareholder’s share of a pass-through entity’s international tax items. Schedule K-1 reports domestic distributive share items (ordinary income, capital gains, deductions). Schedule K-3 sits alongside it and adds the source-by-source and category-by-category detail the IRS needs for foreign tax credit, Subpart F, and GILTI calculations. One K-3 is issued per partner or shareholder.
The two forms travel together. Schedule K-2 attaches to the entity return and reports the totals; Schedule K-3 is the per-owner version that goes out with each Schedule K-1. Three filers use them: partnerships (Form 1065), S corporations (Form 1120-S), and U.S. persons filing for certain foreign partnerships (Form 8865). For a refresher on the underlying statement, see our guide to what a Schedule K-1 is and how to read it.
The partnership version of Schedule K-3 runs to Parts I through XIII. Most partners only touch two or three of them.
Why Schedules K-2 and K-3 exist
The IRS created Schedules K-2 and K-3 to standardize how pass-through entities report international items, which the 2017 tax law made far more complex. Before 2021, partnerships and S corporations reported foreign items as free-form footnotes to Schedule K-1, with no fixed format. Partners often received incomplete data and could not reliably complete Form 1116 or the GILTI and Subpart F calculations.
The 2017 Tax Cuts and Jobs Act added new regimes that require owner-level reporting: Global Intangible Low-Taxed Income (GILTI) under Section 951A, the Section 250 deduction, and a rebuilt foreign tax credit limitation with more separate income categories. Footnotes could not carry that load consistently.
Schedules K-2 and K-3 replaced the footnotes with a fixed grid. Each line ties to a specific Code section and a specific line on the partner’s downstream form, so the same number lands in the same place across every K-3 in the country. That machine-readable structure is the point: it lets the IRS match partner filings against entity filings.
The domestic filing exception
A domestic partnership can skip Schedules K-2 and K-3 entirely if it meets four criteria for the tax year, and the same framework applies to S corporations. The exception spares purely domestic entities from a multi-part international form when their foreign exposure is minimal or zero. The IRS expanded the exception in a June 2025 FAQ update, widening the partner types that qualify.
The four criteria, for a 2025 tax year, are:
| # | Criterion | Detail |
|---|---|---|
| 1 | No or limited foreign activity | Either no foreign activity, or only passive-category foreign income with $300 or less of creditable foreign taxes, shown on a payee statement (such as a 1099) furnished to the entity |
| 2 | Qualifying direct partners only | All direct partners are U.S. citizen or resident-alien individuals, certain domestic estates and trusts, S corporations, single-member LLCs, or domestic partnerships composed solely of those owners |
| 3 | Partner notification | The entity notifies partners, by the time the K-1 is furnished, that they will not receive a K-3 unless they request one (the notice can be an attachment to the K-1) |
| 4 | No K-3 request by the 1-month date | No partner requests K-3 information on or before the “1-month date,” which falls one month before the entity files its return |
For a calendar-year 2025 partnership that extends its return, the latest 1-month date is August 17, 2026. If no partner has requested a K-3 by that date, the entity does not have to file Schedules K-2 and K-3 or furnish K-3 to the non-requesting partners.
The exception has a catch. If a partner requests a K-3 after the 1-month date, the entity still keeps the exception (it does not have to file with the IRS), but it must furnish that partner a completed K-3 within one month of the request. A single foreign partner, or one partner who needs the credit, can pull the form back into play.
How Schedule K-3 feeds the foreign tax credit and Form 1116
Parts II and III of Schedule K-3 carry the numbers a partner needs to claim the foreign tax credit on Form 1116. Part II reports gross income and deductions by source (U.S. versus foreign) and by separate limitation category, which sets the numerator and denominator of the FTC limitation. Part III reports the partner’s share of creditable foreign taxes paid or accrued, plus the expense apportionment (interest, R&E) that refines the limitation.
The flow is direct. A partner takes the foreign-source income from Part II to the income lines of Form 1116, one Form 1116 per separate category (passive, general, and others). The foreign taxes from Part III go to the tax line of the matching Form 1116. Because the entity has already sorted the amounts by country and category, the partner is copying figures rather than recreating the analysis. Our Form 1116 foreign tax credit guide walks through the limitation math those inputs drive, and the broader foreign tax credit overview covers when the credit beats the deduction.
One threshold explains the $300 figure in the domestic filing exception. An individual with $300 or less of creditable foreign taxes ($600 if married filing jointly), all reported on a payee statement, can elect to claim the credit without filing Form 1116 at all under Section 904(j). Below that line, the partner does not need the Part II and Part III detail, which is why the exception uses the same number.
Who needs Schedule K-3
You need Schedule K-3 information if you are a partner or shareholder who must report international items, most commonly to claim the foreign tax credit. A partnership or S corporation must prepare it when it has foreign activity, foreign partners, foreign-source income, foreign taxes, or an interest in a foreign entity, and when any owner cannot use the domestic filing exception.
The clearest triggers on the owner side:
- You want to claim the foreign tax credit and have more than $300 ($600 joint) of foreign taxes, or otherwise must file Form 1116.
- You have a GILTI or Subpart F inclusion from a controlled foreign corporation flowing through the entity.
- You are a foreign partner needing withholding and effectively-connected-income detail.
- You have other cross-border filings, such as Form 5471 for foreign corporations or Form 8938 for foreign financial assets, that draw on the same data.
On the entity side, the requirement attaches to the return itself. A partnership files Schedule K-2 with its Form 1065 partnership return, and an S corporation files it with its Form 1120-S, whenever the international items exist and no exception applies. Even a mostly domestic business with a small slice of foreign dividend income can land inside the rules if one partner requests the form.
Frequently asked questions
What is the difference between Schedule K-2 and Schedule K-3?
Schedule K-2 attaches to the entity return (Form 1065 or 1120-S) and reports the entity’s total international items, an extension of Schedule K. Schedule K-3 is the per-owner version, an extension of Schedule K-1, that reports each partner’s or shareholder’s share of those items. The entity files one K-2 and issues one K-3 to each owner who needs it.
Do I need Schedule K-3 to file my tax return?
You need it if you must report international items, usually to claim the foreign tax credit on Form 1116, report a GILTI or Subpart F inclusion, or complete a related foreign-information form. If your foreign taxes are $300 or less ($600 joint) and shown on a payee statement, you may be able to claim the credit without Form 1116 or the K-3 detail under Section 904(j).
Why did I get a K-1 but no K-3?
The entity likely qualified for the domestic filing exception and sent a notice saying a K-3 is available only on request. If you need the international detail (for example, to claim a foreign tax credit above the $300 threshold), request it. The entity must furnish a completed K-3 within one month of a late request, even though it may not have to file the form with the IRS.
When are Schedules K-2 and K-3 due?
They follow the entity return. A partnership includes Schedule K-2 with Form 1065 and furnishes Schedule K-3 to partners by the K-1 deadline, generally March 15 for calendar-year filers, or the extended deadline. The “1-month date” that governs the domestic filing exception falls one month before the entity files, reaching August 17, 2026 for an extended calendar-year 2025 partnership.
Can a partnership be forced to file K-3 after claiming the exception?
Yes, in part. If a partner requests K-3 information after the 1-month date, the partnership keeps the exception and does not have to file Schedules K-2 and K-3 with the IRS. It must still furnish that specific partner a completed Schedule K-3 within one month of the request. A request received on or before the 1-month date breaks the exception for the whole return.
Which entities file Schedule K-3?
Partnerships file it with Form 1065, S corporations file it with Form 1120-S, and certain U.S. persons file it for foreign partnerships on Form 8865. The partner and shareholder versions differ in their part count and cross-references, but both carry the same categories of foreign-source income, deductions, and creditable foreign taxes that flow to the owner’s Form 1116 or 1118.
Reviewed by The Ledgerism Editorial Team. Last reviewed: July 2026.