Schedules K-2 and K-3: The Domestic Filing Exception, the 1-Month Rule, and the $250,000 Small-Entity Carve-Out for 2026

Picture a six-partner consulting LLC in Ohio. Every partner is a U.S. citizen. The firm has never had a foreign client, never paid a dime of foreign tax, and never thought it had an "international" return. Then a partner's CPA asks for a Schedule K-3 on March 14, and the entire 1065 grinds to a halt.

That scenario plays out in thousands of pass-through entities every March. Schedules K-2 and K-3—the expanded international reporting attachments to Forms 1065, 1120-S, and 8865—apply to far more partnerships and S corporations than their "international" branding suggests. The good news is that the IRS has built a domestic filing exception, expanded it in the 2024 instructions, and bolted on a small-entity carve-out for 2024 and later years. The bad news is that you can lose the exception with one mistimed K-3 request, and the penalty stack for getting it wrong is steep.

This guide walks through who must file, the four conditions of the domestic filing exception, the new small-entity exception, the 1-month-date trap, and how to design a partner notification process that protects the entity even when a partner asks for a K-3 in April.

What Schedules K-2 and K-3 Actually Are

Before 2021, partnerships and S corporations reported items relevant to international tax on a handful of lines in Schedule K and free-form attachments. The IRS replaced that with Schedules K-2 and K-3 to standardize how foreign tax credit, foreign source income, and treaty-related items flow from the entity to its owners.

Schedule K-2 is the entity-level summary. It looks like a giant Schedule K with parts dedicated to foreign tax credit computations (Parts II and III), foreign-derived intangible income (Part IV), distributions from foreign corporations (Part V), and other international items.
Schedule K-3 is the partner/shareholder version—a per-owner cut of K-2 that owners use to prepare Forms 1116 (foreign tax credit), 5471, 8621, 8865, 8992 (GILTI), 8993 (FDII), and treaty disclosures on Form 8833.

The schedules are required for Form 1065 (partnerships), Form 1120-S (S corporations), and Form 8865 (U.S. persons with interests in foreign partnerships). Schedule K-3 is the document a partner's individual tax preparer expects to see when claiming a foreign tax credit on Form 1116.

Why "We Have No Foreign Activity" Doesn't End the Conversation

Here is the trap most domestic firms walk into: the default rule says the schedules apply whenever a partner needs the information to compute their own international tax. Even if the partnership has zero foreign source income, a partner who personally invests in foreign mutual funds, owns a foreign rental, or holds shares of a controlled foreign corporation may need partnership-level data—such as their distributive share of interest expense apportioned to foreign source income—to complete Form 1116.

That is why the IRS built the domestic filing exception. Without it, every U.S. partnership with even one partner who claims a foreign tax credit on their personal return would be pulled into K-2/K-3 land.

The Domestic Filing Exception: Four Conditions

A partnership (or S corporation, with equivalent language) is excused from completing and filing Schedules K-2 and K-3 if it meets all four of the following conditions for the tax year. The conditions live in Question 4 of Schedule B of Form 1065 and in the parallel S corporation instructions.

1. Eligible Direct Partners

Every direct partner must be one of the following:

A U.S. citizen or U.S. resident alien individual
A domestic decedent's estate whose beneficiaries are solely U.S. citizens or resident alien individuals
A domestic non-grantor trust whose beneficiaries are solely U.S. citizens or resident alien individuals
An S corporation with a sole shareholder
A single-member LLC whose sole member is one of the persons above
A domestic partnership whose direct partners are themselves any of the persons above (an expansion added in the 2024 instructions, which now allows tiered domestic partnerships to qualify)

Foreign partners—or U.S. partnerships with even one foreign upper-tier partner—are an instant disqualifier. So is a multi-member LLC owned partly by a foreign person, even indirectly.

2. No or Limited Foreign Activity

The partnership must have either no foreign activity at all or foreign activity limited to:

Passive category foreign income, on which
Not more than $300 of foreign income taxes are treated as paid or accrued, and
Both items are shown on a payee statement (typically a 1099-DIV or 1099-INT reporting foreign tax paid by a mutual fund)

The $300 ceiling means a small amount of foreign tax flowing through a brokerage account does not blow the exception. But a partnership-level foreign tax of $301 does. And anything other than passive category income—general category, GILTI inclusions, branch income—knocks the partnership out, regardless of dollar amount.

3. Partner Notification by the K-1 Furnishing Date

The partnership must notify each partner that it does not intend to furnish a Schedule K-3 unless the partner requests one. The notification can be a separate document or a statement attached to the Schedule K-1, but it must be in the partner's hands no later than when the K-1 is provided.

For a calendar-year partnership planning to file an extended return, the practical deadline for sending the K-3 notice is the same as the K-1 furnishing date—typically March 15 for unextended returns and September 15 for extended returns. Many firms send the notice in January or February as a stand-alone letter so they can document timely delivery before the K-1s are even drafted.

4. No Timely K-3 Request

Finally, the partnership must not receive a K-3 request from any partner on or before the 1-month date—the date that falls one month before the partnership files Form 1065. For a calendar-year partnership filing on extension by September 15, 2026 (for the 2025 tax year), the latest possible 1-month date is August 17, 2026. For a non-extended return filed March 16, 2026, the 1-month date is February 16, 2026.

The 1-month date is a moving target. It is keyed to the actual filing date, not the due date, so a partnership that files early shortens its own window.

What Happens When a Partner Requests a K-3 Late

A partner who asks for a K-3 after the 1-month date does not blow the entire exception. The 2024 instructions clarified that:

If no partner requested a K-3 by the 1-month date, the partnership can still rely on the exception and avoid filing Schedules K-2 and K-3 with the IRS.
The partnership must still furnish a Schedule K-3 to the partner who made the late request, but only to that partner. The other partners are not entitled to one.

This carve-out is the most important practical update of the past two years. Before it, a single late request—often from a partner's CPA scrambling on April 10—forced the partnership to assemble full K-2/K-3 schedules for everyone. Now, the entity can deliver a one-off K-3 to the requesting partner and leave the rest of the return alone.

The Small Entity Exception (Tax Years 2024 and Later)

Beginning with tax year 2024, the IRS added a separate small-entity exception that does not depend on partner composition or the 1-month rule. A partnership or S corporation qualifies if:

Total receipts for the tax year are less than $250,000, and
Total assets at the end of the tax year are less than $250,000 (for S corporations) or less than $1,000,000 (under the parallel partnership thresholds in some IRS guidance), and
All Schedules K-1 are filed with the return on time, and
The entity is not required to file Schedule M-3.

The partner-notification step still applies—owners must be told they will not receive a K-3 unless they ask—but the foreign-activity test and the eligible-partner test are bypassed. For a tiny LLC with a single foreign partner and no foreign activity, the small-entity exception is now the only realistic path to skipping K-2/K-3, because the foreign-partner element disqualifies the domestic filing exception.

A Real-World Walkthrough

Consider a calendar-year partnership, Maple & Oak Consulting LLC, with four U.S. citizen partners, no foreign source income, and a single 1099-DIV showing $87 of foreign tax paid by a money market fund inside the partnership's operating account. The partnership plans to file Form 1065 on extension by September 15, 2026.

Step 1—Send the K-3 notice. By the end of January 2026, the partnership sends each partner a letter stating, "We do not expect to furnish a Schedule K-3 for tax year 2025 unless you request one. If you need a K-3, please notify us by July 17, 2026 (one month before we plan to file)."

Step 2—Confirm eligible partners and limited foreign activity. All four partners are U.S. citizens; foreign tax is $87 of passive category income, well under the $300 ceiling.

Step 3—Track requests against the 1-month date. The partnership decides to file on August 17, 2026, making the 1-month date July 17, 2026. By that date, no partner has requested a K-3.

Step 4—File without K-2/K-3. The partnership checks "Yes" on Schedule B, Question 4, confirming the domestic filing exception is met, and files Form 1065 without the schedules.

Step 5—Handle a late request. On August 22, 2026, one partner's CPA emails asking for a K-3 to support a Form 1116 on the partner's personal return. The partnership prepares a Schedule K-3 for that partner only, furnishes it, and does not need to amend Form 1065 or send K-3s to the other three partners.

This is the template. The variables are the eligibility of the partners, the foreign tax amount, the timing of the notice, and the filing date that sets the 1-month deadline.

Penalties for Getting It Wrong

Failure to file or correctly furnish Schedules K-2 and K-3 triggers more than one penalty regime.

Section 6698 partnership return penalties—generally $245 per partner per month, up to 12 months, for late or incomplete returns. The IRS treats missing K-2/K-3 as an incomplete return.
Section 6722 information return penalties—up to $330 per Schedule K-3, with annual caps that can reach $3,987,000 for large filers.
Form 8865 penalties—a separate $10,000-per-form initial penalty for U.S. persons with foreign partnership interests, plus $10,000 per 30 days after IRS notice, capped at $50,000 in additional penalty.
Foreign tax credit reduction—a 10% reduction in available foreign tax credits if Form 8865 is late, applied on top of cash penalties.

These regimes stack. A late-filed Form 8865 with missing Schedules K-2 and K-3 can produce a $10,000 form penalty, a separate K-3 penalty per partner, and a measurable reduction in the partners' foreign tax credits—often a five- to six-figure hit on what looked like a procedural slip.

Common Pitfalls and How to Avoid Them

Pitfall 1: Treating the K-3 notice as optional. Without the notice, the partnership cannot rely on the 1-month rule. Send the notice annually, even when nothing else has changed.

Pitfall 2: Filing too early. A partnership that files Form 1065 on February 28 has a 1-month date of January 28—earlier than most partners have even thought about their personal returns. Either delay filing or aggressively solicit K-3 requests before the date.

Pitfall 3: Forgetting tiered partnerships. An upper-tier domestic partnership counts as an eligible partner only if its direct partners are themselves all eligible. A two-tier structure with a single foreign indirect partner kills the exception.

Pitfall 4: Counting only partnership-level foreign tax. The $300 ceiling applies to foreign income taxes "treated as paid or accrued by the partnership." Brokerage 1099-DIVs reporting foreign tax inside the partnership's investment account count toward the ceiling.

Pitfall 5: Assuming the exception covers Form 8865. Domestic filing exception language lives in the Form 1065 and Form 1120-S instructions. Form 8865, used by U.S. persons with interests in foreign partnerships, has its own K-2/K-3 instructions that are far less forgiving. If any partner has Category 1 or Category 2 reporting on Form 8865, full K-2/K-3 schedules are almost always required.

Pitfall 6: Verbal-only K-3 requests. Require written requests with a date. A scribbled note on a K-1 can become disputed evidence if the IRS later examines whether the 1-month rule was met.

Building a K-3 Workflow That Scales

For practitioners managing multiple partnerships:

Calendar the 1-month date as soon as the partnership commits to a filing window. If the firm typically files extensions on August 15, set the deadline at July 15 and treat any K-3 request after that as a single-partner deliverable.
Standardize the K-3 notice. A reusable template covers the four exception conditions in plain language and includes a request form partners can return by email.
Map partner composition annually. A new partner—especially a foreign person, a multi-member LLC, or a complex trust—changes eligibility. Confirm composition in January, not at filing time.
Track foreign tax paid in real time. Inside the partnership's accounting system, code 1099-DIV foreign tax to a dedicated subaccount. A running total against the $300 ceiling tells you in November whether you still qualify for the exception.
Document everything. Save the K-3 notice, the partner roster, the foreign tax workpaper, and the date of any K-3 request. The exception is a factual position, and the IRS may ask for evidence.

Keep Your Partnership Books Audit-Ready Year-Round

The domestic filing exception lives or dies on records: who the partners were, when the K-3 notice went out, what foreign tax flowed through, and when each request arrived. A general ledger that buries those details in scanned PDFs and a year-end spreadsheet is exactly the kind of system that breaks down under a K-2/K-3 examination.

Beancount.io gives partnerships and S corporations a plain-text, version-controlled accounting platform where every entry is human-readable, every change is git-tracked, and foreign tax categories can be tagged and totaled at any moment. Auditors, partners, and your tax preparer all see the same source of truth—no exports, no proprietary file formats, no surprises. Get started for free and bring the same engineering discipline to your books that you already bring to your code.

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