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A small professional corporation on a fiscal year shows up mid‑audit with IRS questions about deduction timing, has been making a Section 444 election for years, and has never once computed the Section 280H limitation. Rebuilding several returns is the price of that gap, and it traces back to one overlooked schedule.
Form 1120 Schedule H computes the Section 280H deduction limits for personal service corporations that have elected a fiscal tax year under Section 444. Part I tests the minimum distribution requirement, where line 13 is the smaller of the preceding‑year amount on line 3 and the 3‑year‑average amount on line 12, with the percentage on line 10 capped at 95 percent; Part II computes the maximum deductible amount on line 19 only when the PSC fails Part I. It is due with Form 1120, April 15 for calendar‑year filers, with a 6‑month extension via Form 7004.
Key Takeaways
- Schedule H (Form 1120) computes deduction limitations under IRC Section 280H for personal service corporations (PSCs) that use a fiscal tax year via a Section 444 election.
- Not all PSCs need Schedule H – only those that have elected a fiscal year under Section 444 that differs from the required tax year of their principal employee-owners.
- The limitation prevents PSCs from using fiscal year deferrals to defer income recognition for their owner-employees. Schedule H either limits deductions or requires a minimum distribution to avoid the limitation.
- Schedule H is due with the Form 1120 return – April 15 for calendar-year-end filers, or the 15th day of the fourth month after fiscal year-end, with a 6-month extension via Form 7004.
- PSCs face a flat 21% corporate tax rate (post-2017 Tax Cuts and Jobs Act), but the deduction limitation can still erode net income in ways that compound over multiple years.
- Quick rule you can copy into your SOP: at engagement setup, confirm whether the entity qualifies as a PSC and whether a Section 444 election is active. If both are true, Schedule H is required – no exceptions.
What Schedule H Is and When to Use It
Schedule H (Form 1120) is the computation schedule for deduction limitations imposed on personal service corporations under IRC Section 280H. The limitation exists because Congress wanted to prevent PSCs from using fiscal year elections to indefinitely defer the recognition of income by their employee-owners. When a PSC uses a fiscal year that ends before its owners’ calendar year, income can be deferred for the portion of the owners’ year after the PSC’s fiscal year-end. Schedule H quantifies whether deductions must be restricted – or whether the PSC can avoid the restriction by paying sufficient amounts to its employee-owners during the deferral period.
From my side of the desk, Schedule H is one of the most misunderstood corporate schedules in practice. Many preparers treat it as optional or assume it only applies in edge cases. In reality, any PSC that has ever made a Section 444 election – even if it was made years ago and the corporation has been on that fiscal year ever since – must complete Schedule H every year the election remains in effect, attaching it to Form 1120 only when the PSC fails the minimum distribution test in Part I per the Schedule H instructions.
When Schedule H Is Not Required
If the PSC uses its required tax year (typically December 31 for a PSC whose principal owner-employees are calendar-year taxpayers), Section 280H does not apply and Schedule H is not needed. The limitation only activates when there is a fiscal year deferral. PSCs that revoke their Section 444 election and return to the required tax year can stop filing Schedule H going forward.
The Policy Behind Section 280H
Under a fiscal year deferral, if a PSC’s fiscal year ends September 30, its employee-owners do not recognize income from the PSC until after the calendar year that the fiscal year ends in – effectively deferring income recognition for up to three months per year. Section 280H limits the deductions the PSC can take to prevent the deferral from being tax-advantaged relative to what a calendar-year entity would receive.
What Is a Personal Service Corporation?
Not every service-based corporation qualifies as a PSC under the tax code. The definition is specific and both prongs must be met simultaneously.
The Principal Activity Test
The corporation’s principal activity must be the performance of personal services, and those services must be substantially performed by employee-owners. “Substantially” means more than 20% of the corporation’s compensation costs must relate to services performed by employee-owners. Personal services include services in the fields of health, law, engineering, architecture, accounting, actuarial science, performing arts, and consulting.
The Ownership Test
Per the Schedule H instructions, an employee-owner is any person who owns any outstanding stock of the PSC on any day of the tax year – the statute uses “any” outstanding stock and applies no minimum ownership percentage. An employee-owner is any person who owns any stock in the corporation and is an employee – or who performs services for or on behalf of the PSC, including as an independent contractor – during the testing period. If all shareholders are passive investors with no employment relationship, the ownership test fails even if the service test is met.
Qualified Personal Service Corporations
A related but distinct concept is the “qualified personal service corporation” (QPSC) for purposes of the flat corporate tax rate. Under pre-TCJA law, QPSCs faced a flat 35% rate. Post-TCJA, all C corporations pay 21%, eliminating the flat rate penalty. However, the PSC classification still matters for Section 444 election eligibility and Section 280H limitations, so the definition remains operationally important even after the tax rate change.
The Section 444 Election and the Fiscal Year Deferral
The Section 444 election allows partnerships, S corporations, and PSCs to elect a fiscal year that is not the required tax year, provided the deferral period does not exceed three months. For a PSC whose principal owners are calendar-year individuals, the required tax year is December 31. A September 30, October 31, or November 30 fiscal year can be elected under Section 444, creating a deferral of three, two, or one months respectively (per the Schedule H instructions worked example, a September 30 election gives the maximum three-month deferral – the gap between September 30 and December 31).
Making and Maintaining the Election
The Section 444 election is made on Form 8716, filed by the due date (including extensions) of the return for the first tax year to which the election applies. Once made, the election remains in effect until revoked or until the entity no longer qualifies. As long as the Section 444 election is active, Schedule H must be computed annually.
The Required Payment and the Minimum Distribution
As an alternative to the deduction limitation, PSCs can make a “required payment” during the deferral period under Section 7519. This required payment effectively pre-pays the tax that would otherwise be deferred. However, most PSCs in practice choose to meet the Section 280H minimum distribution requirement instead, which avoids both the deduction limitation and the required payment. Schedule H is the mechanism for computing which approach applies and whether the minimum distribution threshold has been met.
How to Complete Schedule H
Part I – Deferral Period Income and Deductions
| Line | Description | Practitioner Note |
|---|---|---|
| 1 | Enter applicable amounts from preceding tax year | Pull preceding-year applicable amounts paid to employee-owners from the prior return’s compensation detail |
| 2 | Divide months in deferral period of preceding tax year by months in preceding tax year; enter the result as a percentage | For a September 30 fiscal year, the ratio is 3/12 (25 percent) |
| 3 | Amount figured under preceding year test (Line 1 multiplied by the percentage on Line 2) | This is the preceding-year-test threshold for the minimum distribution |
Part I Continued – Current-Year and 3-Year Lookback Amounts (Lines 4–13)
| Line | Description | Practitioner Note |
|---|---|---|
| 4 | Enter applicable amounts from the deferral period of the applicable election year | Current-year deferral-period applicable amounts paid to all employee-owners |
| 5a–5c | Applicable amounts from the 1st, 2nd, and 3rd tax years before the applicable election year | 3-year lookback figures pulled from prior returns |
| 6 | Total. Add lines 5a through 5c | Sum of the 3-year lookback applicable amounts; used with line 8 to compute the line 9 ratio |
Part II – Maximum Deductible Amount (Lines 14–19)
If line 13 (the minimum distribution requirement, the smaller of line 3 and line 12) is more than line 4 (current-year deferral-period applicable amounts), the PSC has failed Part I and Part II is mandatory. Part II computes the maximum deductible amount on line 19 (line 14 plus line 18) under Section 280H(d). Per the Schedule H instructions, any applicable amount not allowed in the current year because of the Section 280H(d) limitation is treated as paid or incurred in the PSC’s succeeding tax year – the deduction is timing-limited, not permanently lost, but the carryforward can compound across multiple years if not properly tracked.
Deadlines, Penalties, and Filing Requirements
| Item | Detail |
|---|---|
| Due date (calendar year) | April 15 (15th day of 4th month after year-end) |
| Due date (fiscal year PSC) | 15th day of 4th month after fiscal year-end |
| Extension (Form 7004) | Automatic 6-month extension; extends return filing, not payment |
| Failure-to-file penalty | 5% of unpaid tax per month, up to 25% (applies to Form 1120 return) |
| Omitting Schedule H | Renders the return incomplete; IRS may assess interest on disallowed deductions |
| Section 444 election form | Form 8716 – filed separately to establish or renew the fiscal year election |
Because Schedule H is a computational schedule and not a stand-alone filing, there is no separate penalty code for omitting it. However, if the Schedule H computation would have resulted in a deduction carryforward that was not applied, the IRS can recompute taxable income, assess additional tax, and charge interest. This is effectively an accuracy-related penalty exposure even if no explicit Schedule H penalty code exists.
How Section 280H Deduction Limits Work
Section 280H limits deductions that are allocable to the deferral period if the PSC did not make adequate distributions to employee-owners during that period. The limited deductions are not permanently disallowed – they carry forward to the next tax year. But they cannot be used in the year they are incurred, which can distort both taxable income and owner-compensation planning.
What Counts as the Deferral Period
The deferral period is the period starting the day after the fiscal year-end and ending on December 31 – per the Schedule H instructions and fact:psc-required-tax-year, the required tax year for a PSC is the calendar year, so the deferral period always ends on December 31 regardless of any individual owner’s tax year. For a PSC with a September 30 fiscal year and calendar-year owners, the deferral period is October 1 through December 31 – exactly three months. Deductions that are allocable to those three months are the ones subject to potential limitation.
Pro-Rating Deductions
Most deductions are allocated pro-rata based on the ratio of deferral period months to total fiscal year months. For a September 30 year, that ratio is 3/12, or 25%. If the PSC has $400,000 in total deductions, $100,000 is allocable to the deferral period. Whether those deductions are allowed or limited depends on whether the PSC made sufficient distributions during the deferral period.
Avoiding the Limitation Through Minimum Distributions
The most practical way for a PSC to avoid the Section 280H limitation is to pay its employee-owners enough during the deferral period. The minimum applicable amount is computed each year from the PSC’s own data using the two tests in Part I – the preceding-year test on line 3 and the 3-year average test on line 12. Per rule:form-still-current-2025, the December 2011 revision of Schedule H remains the current revision for tax year 2025; the IRS does not redefine a 'minimum applicable amount' annually. If the PSC pays applicable amounts at or above the smaller of those two thresholds during the deferral period, the deduction limitation does not apply, Part II is not completed, and the schedule is retained with the PSC’s tax records rather than attached to Form 1120.
What Qualifies as a Distribution
Qualified distributions are payments made to employee-owners during the deferral period that would be includable in the employee-owner’s gross income for their tax year beginning with or within the PSC’s fiscal year. Salaries, bonuses, and other compensation paid during October, November, and December qualify. Payments characterized as return of capital or repayment of shareholder loans do not count, and per the Schedule H instructions, dividends paid by the corporation and gain on the sale or exchange of property between an employee-owner and the corporation are also excluded from applicable amounts.
Timing Precision Matters
The distribution must be made during the deferral period – not before the fiscal year-end and not after December 31. A bonus paid in early January of the following year does not satisfy the minimum distribution requirement for the prior fiscal year. Build your distribution schedule into the PSC’s fourth-quarter payroll planning to ensure the timing is locked in before year-end.
PSC Flat Tax Rate and Its Interaction with Schedule H
Before the Tax Cuts and Jobs Act of 2017, personal service corporations faced a flat 35% corporate tax rate, eliminating the graduated rate structure available to other corporations. The TCJA lowered the flat rate for all C corporations to 21%, which eliminated the rate differential penalty. However, the PSC classification for purposes of Schedule H and Section 280H survived the TCJA and remains in effect for fiscal year elections and deduction limitation purposes.
Some firms mistakenly concluded after the TCJA that PSC rules became irrelevant. That is incorrect. The Section 444 election and Section 280H limitation are statutory provisions independent of the tax rate. A PSC that elected a fiscal year before 2018 must continue filing Schedule H as long as the Section 444 election is in effect, regardless of the flat rate change. The only way to eliminate the Schedule H obligation is to revoke the Section 444 election and convert back to the required tax year.
Common Mistakes That Slow Things Down
The same patterns repeat every fiscal-year cycle. PSCs treat Schedule H as a paperwork exercise instead of a planning tool, and the cleanup lands on the preparer in the worst possible week. The six mistakes below are the ones we see most often in PSC engagements.
Practical Checklists You Can Reuse
The three checklists below are copy-paste ready for firm SOPs covering PSC engagements. Adapt the wording, but keep the line-number references intact – they map directly to the December 2011 revision of Schedule H, which the IRS still publishes as the current revision for tax year 2025.
PSC scope and Schedule H eligibility check
- Confirm the corporation meets the Section 441(i)(2) personal service corporation definition for the current tax year.
- Verify an in-force Section 444 election (Form 8716) for a fiscal year ending other than December 31.
- Confirm this is not the corporation's first year of existence – newly organized PSCs are deemed to meet the Section 280H distribution requirement for year one and do not file Schedule H.
- If the corporation became a PSC during the tax year, document that it is treated as a PSC for the 3 preceding tax years for the line 5a-5c and line 7a-7c lookback.
- Calendar the deferral period (months from the last day of the elected year to December 31) and the nondeferral period for the current tax year.
- List every individual who held any outstanding PSC stock on any day of the tax year alongside their service relationship – this is the employee-owner population, with no minimum ownership threshold.
- Identify any related-party payment paths that could be indirectly includible in an employee-owner's gross income under Temporary Regulations Section 1.280H-1T(b)(4)(ii) and (iii).
Part I minimum distribution test workflow
- Pull preceding-year applicable amounts to employee-owners from the prior return's compensation detail and post to line 1.
- Compute the deferral-period percentage on line 2 and the preceding-year-test amount on line 3.
- Tally current-year deferral-period applicable amounts on line 4, then run the line 4 vs line 3 gate – if line 4 is greater than or equal to line 3, stop Part I and archive.
- Populate lines 5a-5c (applicable amounts) and 7a-7c (adjusted taxable income) for the 3 preceding tax years.
- Compute line 9 as line 6 divided by line 8, then enter the smaller of line 9 or 95 percent on line 10. Flag any preparer entry that exceeds the cap.
- Calculate line 13 as the smaller of line 3 and line 12, then compare to line 4. If line 13 is less than or equal to line 4, do not complete Part II and do not attach Schedule H.
- If Part II is required, complete lines 14-19, attach Schedule H to Form 1120, and open a Section 280H(d) carryover entry for the disallowed difference.
Mid-year deferral-period distribution planning
- Re-run the prior-year line 1 and line 2 figures by the start of the deferral period to anchor the line 3 target.
- Estimate adjusted taxable income for the deferral period under the PSC's normal method of accounting – reasonable estimates are acceptable per Temporary Regulations Section 1.280H-1T(c)(3)(iii).
- Project line 12 from the most recent three-year applicable-amount and adjusted-taxable-income data, applying the 95 percent cap on line 10.
- Build a payroll plan that lands deferral-period applicable amounts at or above the smaller of the two targets, with a documented cushion for variance.
- Cross-check that every planned distribution is otherwise-deductible compensation includible in employee-owner gross income – exclude dividends and property-sale gains.
- Lock the plan in writing before the final deferral-period payroll cycle so the December (or applicable) payroll cannot drift below the target.
Keep Schedule H (Form 1120) Season From Stalling
Schedule H sits inside a hybrid filing rhythm that breaks most PSC delivery models. The Section 444 election locks the PSC into a fiscal year ending September 30, October 31, or November 30, which means October through January are simultaneously deferral-period distribution-planning months for the current year, return-finalization months for the prior year, and the heaviest individual-1040 staffing months for the firm overall. The IRS still publishes the December 2011 revision of Schedule H as the current revision for tax year 2025, per the Schedule H (Form 1120) instructions – so any process built around year-specific guidance has nothing new to lean on, and the structural workflow is the only available lever.
The fix is to split Schedule H into two distinct phases inside the engagement calendar: a mid-year planning phase that locks the distribution target before the final deferral-period payroll, and a post-close compliance phase that runs the Part I gate and either archives or attaches. Both phases need their own preparer, their own review path, and their own documented handoff into workpapers.
- Tag every PSC engagement with its fiscal year-end on the workflow board so the deferral-period planning task fires automatically 90 days before December 31, not when the return enters preparation.
- Standardize the line 9 and line 10 calculation cells with the 95 percent cap as a hard ceiling – every PSC return uses the same template so reviewers can spot a missing cap in seconds.
- Maintain a Section 280H(d) carryover register at the engagement level so any disallowed amount on line 19 rolls forward into the next year's compensation accrual workpaper without manual reconstruction.
- Build the Part I stop-and-archive gate into the preparer checklist so a passing schedule is filed with workpapers, not attached to Form 1120, on the first review pass.
- Trigger an employee-owner population refresh whenever new stock is issued or transferred to a service provider during the tax year, so applicable-amount totals stay accurate from the day status changes.
That structure is exactly how our delivery teams handle PSC engagements alongside the rest of the corporate tax workload. Accountably's tax outsourcing service wires the deferral-period planning task and the Part I gate into the engagement workflow with documented SOPs, multi-layer review, and turnaround SLAs, so Schedule H stops competing with March individual returns for senior reviewer time.
FAQs
What is Form 1120 Schedule H used for?
Schedule H computes the deduction limitations under IRC Section 280H for personal service corporations that have elected a fiscal tax year under Section 444. It determines whether the PSC must limit certain deductions or whether it has made sufficient distributions to its employee-owners during the deferral period to avoid the limitation.
What is a personal service corporation for Schedule H purposes?
A PSC for Section 280H purposes is a C corporation whose principal activity is the performance of personal services substantially performed by employee-owners. Per the Schedule H instructions, an employee-owner is any person who owns any outstanding stock of the corporation on any day of the tax year, with no minimum ownership percentage. Qualifying service fields include health, law, engineering, architecture, accounting, actuarial science, performing arts, and consulting.
When is Schedule H required on Form 1120?
Schedule H is required whenever a PSC has an active Section 444 election for a fiscal tax year that differs from the required tax year of its principal employee-owners. The schedule must be computed every year the election remains in effect, but per the Schedule H instructions it is only attached to Form 1120 when the PSC fails the minimum distribution test in Part I – if the test is met, the completed schedule is kept with the corporation's tax records instead of being attached to the return.
What is the Section 444 election and how does it relate to Schedule H?
The Section 444 election allows PSCs, partnerships, and S corporations to use a fiscal year other than their required tax year, provided the deferral is no more than three months. PSCs with an active Section 444 election must compute Schedule H annually. Form 8716 is used to make or renew the election.
Can a PSC avoid the Section 280H deduction limitations?
Yes. A PSC avoids deduction limitations by making qualifying distributions to its employee-owners during the deferral period (October, November, December for a September 30 fiscal year corporation) in amounts that meet or exceed the applicable amount defined in the Schedule H instructions. If distributions are sufficient, Part II is not completed and the schedule is retained with the PSC's tax records rather than attached to Form 1120.