Form 1120 Schedule H Guide: PSC Section 280H Limits

1. Introduction – What is Form 1120 (Schedule H)?

IRS Form 1120 (Schedule H), officially titled “Section 280H Limitations for Personal Service Corporations (PSCs),” is a specialized corporate tax schedule. The Internal Revenue Service (IRS) governs this schedule under Section 280H and Section 444 of the Internal Revenue Code.

Schedule H (Form 1120) is attached to Form 1120 by Personal Service Corporations (PSCs) that elect to use a fiscal tax year rather than a standard calendar tax year. It calculates the maximum allowable deduction for compensation paid to employee-owners if the corporation fails minimum distribution requirements.

2. Purpose of the Form

The primary purpose of Schedule H (Form 1120) is to limit tax deferral opportunities for professional service practices. Under Section 441, Personal Service Corporations (such as medical practices, law firms, accounting firms, or engineering companies) are generally required to use a calendar tax year ending December 31.

If a PSC elects an alternative fiscal tax year under Section 444, Section 280H requires the corporation to pay out a statutory minimum amount of compensation to owner-employees during the “deferral period” (the months between the start of the fiscal year and December 31). Schedule H determines whether the PSC met this requirement and caps owner salary deductions if the test was failed.

3. Who Needs to File This Form

Personal Service Corporations filing Form 1120 must attach Schedule H if they maintain an active fiscal year election under Section 444. You are required to file Schedule H (Form 1120) under the following conditions:

• Your business is a Personal Service Corporation whose principal activity is performing personal services (in health, law, engineering, architecture, accounting, actuarial science, performing arts, or consulting) substantially performed by employee-owners.
• Your PSC filed IRS Form 8716 to elect a fiscal tax year other than a calendar year.
• Your PSC maintains this Section 444 election in effect for the current corporate tax year.

4. Who Is Exempt / Not Required to File

Corporations that operate on standard tax years or outside the personal service sector are exempt from filing Schedule H (Form 1120). Additional exemptions include:

• Calendar-Year PSCs: Personal Service Corporations operating on a standard calendar tax year ending December 31 do not file Schedule H.
• Business-Purpose Fiscal Years: PSCs that established an approved business-purpose fiscal year under Section 441(i) without a Section 444 election.
• Standard C-Corporations: General commercial C-corporations outside the personal service sector file Form 1120 without Schedule H.
• S-Corporations: S-corporations file Form 1120-S and handle Section 444 elections under Section 7519 required payment rules.

5. When to File

Schedule H (Form 1120) is an attachment to Form 1120 (U.S. Corporation Income Tax Return). It adheres to the PSC’s corporate fiscal year filing deadlines:

• Fiscal-Year Due Date: Due on the 15th day of the 4th month following the close of the PSC’s fiscal tax year (e.g., January 15 for a September 30 fiscal year end).
• Automatic Extension: The PSC can obtain an automatic six-month extension by filing Form 7004 on or before the original return due date.

6. Where and How to File

Schedule H (Form 1120) is filed electronically as part of the primary Form 1120 corporate tax return package using IRS-approved enterprise e-file software. Electronic filing ensures accurate calculation of deferral period compensation ratios.

If filing a paper return, place Schedule H directly behind Form 1120 Page 6 in the corporate return assembly package. Mail the complete corporate tax package to the designated IRS service center address indicated in the official Form 1120 instructions.

7. Step-by-Step Instructions to Fill the Form

Schedule H (Form 1120) uses a three-part calculation to evaluate deferral period payouts and cap salary deductions. Below is an overview of how to complete the schedule:

Form Part	Part Title	Description & Calculation Instructions
Part I	Minimum Distribution Requirement	Calculate compensation paid to employee-owners during the deferral period and compare it to the statutory minimum requirement based on prior 3-year averages.
Part II	Maximum Allowable Deduction	If Part I minimum distributions were not met, compute the Section 280H maximum allowable salary deduction for the current fiscal tax year.
Part III	Disallowed Amounts & Carryforward	Determine unallowed employee-owner compensation that must be deferred and claimed as a deduction in the subsequent corporate tax year.

8. Required Documents/Information Needed Before Filling

Completing Schedule H (Form 1120) requires gathering historical corporate payroll ledgers and Section 444 election documents. Make sure your tax department compiles the following items before starting:

• The PSC’s official Employer Identification Number (EIN) and a copy of approved Form 8716 (Section 444 election).
• Payroll ledgers detailing total compensation paid to employee-owners during the deferral period of the tax year.
• Historical payroll and taxable income records for the preceding three corporate tax years.
• Current-year Form 1120 taxable income workpapers prior to deducting owner-employee compensation.

9. Common Mistakes to Avoid

Errors on Schedule H (Form 1120) can lead to overclaimed corporate deductions, interest charges, and IRS audit notices. Corporate tax managers should avoid these frequent missteps:

• Failing Deferral Period Payouts: Failing to monitor owner-employee compensation paid between the start of the fiscal year and December 31, triggering Section 280H deduction caps.
• Deducting Full Salary When Capped: Deducting 100% of owner-employee compensation on Form 1120 Page 1 when Part II of Schedule H limits the allowable deduction.
• Omitting Schedule H on Fiscal Returns: Maintaining an active Section 444 fiscal year election on Form 8716 but failing to attach Schedule H to Form 1120.
• Forgetting Deferred Carryforwards: Failing to claim unallowed deferred compensation from a prior Part III calculation as an allowable deduction on the subsequent year’s return.

10. Penalties for Non-Filing or Errors

Schedule H (Form 1120) does not carry an independent standalone failure-to-file penalty. However, miscalculating Section 280H deduction limits directly alters corporate taxable income and carries severe tax risks.

The primary risks and penalties include:

• Failure-to-Pay Penalty: If overclaimed owner compensation deductions cause an underpayment of corporate income tax, the IRS assesses a 0.5% monthly penalty up to a 25% maximum.
• Late Filing Penalty: Standard corporate late filing penalties (5% per month) apply if Form 1120 is submitted past the due date.
• Accuracy-Related Penalty: A 20% penalty applies under Section 6662 if deduction overstatements result from negligence or disregard of Section 280H rules.

11. Related Forms or Schedules

Schedule H (Form 1120) works alongside several key corporate tax forms and fiscal year election documents:

• Form 1120: U.S. Corporation Income Tax Return, the primary return to which Schedule H is attached.
• Form 8716: Election To Have a Tax Year Other Than a Required Tax Year, used to establish a Section 444 fiscal year.
• Form 7004: Application for Automatic Extension of Time to File.
• Form 1120-W: Estimated Tax for Corporations.

12. Frequently Asked Questions

What is a Personal Service Corporation (PSC)?

A Personal Service Corporation is a C-corporation whose principal activity is performing personal services (such as healthcare, law, accounting, or engineering) substantially performed by employee-owners.

What is a Section 444 election on Schedule H?

A Section 444 election allows a Personal Service Corporation to use an alternative fiscal tax year rather than a required calendar tax year ending December 31.

What is the deferral period for a PSC fiscal year?

The deferral period is the number of months between the beginning of the elected fiscal tax year and December 31 (for example, three months for a September 30 fiscal year end).

What happens if a PSC fails the Section 280H minimum distribution test?

If the PSC fails the Part I minimum distribution test, Part II of Schedule H caps the allowable current-year corporate deduction for owner-employee compensation.

Are unallowed employee-owner compensation deductions lost forever?

No. Disallowed compensation under Section 280H is deferred and carried forward to be claimed as a deduction in the subsequent corporate tax year.

How does Schedule H differ from Section 7519 required payments?

Schedule H (Form 1120) applies Section 280H compensation deduction caps to C-corporation PSCs. Section 7519 applies required tax interest payments to S-corporations and partnerships using fiscal years.

13. Conclusion – Key Takeaways

IRS Form 1120 (Schedule H) is an essential corporate tax schedule for Personal Service Corporations maintaining a Section 444 fiscal year election. It enforces Section 280H minimum distribution rules for owner-employee compensation.

Monitoring deferral period payroll, accurately computing Part II deduction caps if minimum distributions are missed, carrying forward deferred compensation, and attaching Schedule H to Form 1120 ensures full corporate tax compliance.