S Corp SEP Contributions: Rules and Examples

An S corporation generally bases its SEP-IRA contribution for a shareholder-employee on eligible Form W-2 compensation, not on shareholder distributions. For 2026, the IRS says an employer contribution cannot exceed the lesser of 25 percent of an employee’s compensation or $72,000, subject to the plan terms and other applicable limits.

A SEP is an employer retirement arrangement. The corporation chooses a contribution rate for the year and generally must apply the plan’s allocation formula to all eligible employees. It is not simply a personal IRA deposit that the shareholder calculates from business profit after the books are closed.

The short answer

A working shareholder usually has two separate cash flows: W-2 compensation for services and shareholder distributions. The IRS states that S corporation distributions are not earned income for retirement-plan purposes. Increasing distributions does not increase SEP contribution capacity.

The corporation’s adopted SEP document controls eligibility and allocation, while federal limits cap the contribution. A traditional SEP generally does not permit employee elective deferrals or catch-up contributions. Those features belong to other plan types, except for limited legacy SARSEP arrangements and newer Roth SEP provisions where implemented under applicable rules.

A worked contribution example

Assume a shareholder-employee receives $80,000 of eligible W-2 compensation and $60,000 of shareholder distributions in 2026. If the corporation adopts a 20 percent SEP contribution rate under a plan that covers the employee, the illustrative employer contribution is $16,000: 20 percent of $80,000.

The $60,000 distribution does not enter the SEP compensation base. If the shareholder received only distributions and no eligible W-2 compensation, the distribution by itself would not support a SEP contribution for that person. This example does not determine whether $80,000 is reasonable compensation for the shareholder’s services; reasonable compensation requires its own factual analysis.

Questions to resolve before funding

1. Was a valid SEP established? Locate the signed Form 5305-SEP or approved prototype document and confirm the adoption and contribution deadlines.
2. Who is eligible? Review age, service, compensation, and excluded-employee provisions in the plan document.
3. What compensation is eligible? Reconcile W-2 payroll to the definition used by the plan and current IRS limits.
4. What rate will the employer use? Apply the allocation formula consistently to eligible participants.
5. Can the corporation fund the contribution? A tax deduction does not create cash. Preserve payroll deposits, operating reserves, and filing obligations.
6. How will it be recorded? Post employer retirement-plan expense and the payable or cash disbursement to dedicated accounts.

Reasonable compensation still matters

The IRS says an S corporation must pay reasonable compensation to a shareholder-employee for services before making non-wage distributions. A SEP calculation should not reverse that logic by choosing an arbitrary wage solely to produce a desired retirement contribution.

Document the shareholder’s duties, time, experience, revenue-producing role, management work, and comparable compensation. Then run payroll correctly and calculate the SEP contribution from eligible compensation. Retirement planning and wage support should reconcile rather than contradict each other.

Common S corporation SEP mistakes

• Using distributions as compensation. Shareholder distributions are not earned income for the SEP calculation.
• Funding only the owner. Eligible non-owner employees generally must receive contributions under the same plan formula.
• Confusing 25 percent with an automatic contribution. It is a limit, not a required rate, and the plan document still governs.
• Adding an employee deferral. A traditional SEP is funded by employer contributions, not ordinary employee elective deferrals.
• Ignoring annual limits. Dollar and compensation limits can change each year.
• Posting the payment to distributions. Employer SEP expense and shareholder distributions belong in different ledger accounts.

Keep the SEP workpaper with payroll reports, W-2 reconciliation, employee eligibility list, signed plan document, contribution calculation, custodian confirmation, and board or owner approval. The related guide to the S corporation tax return helps connect this file to the year-end close.

Reconcile the contribution before year-end closes

Build a workpaper that starts with eligible W-2 compensation, applies the plan terms, and compares the calculated contribution with deposits already made. Reconcile payroll records to the general ledger and confirm that shareholder distributions were not used as compensation in the calculation. If employees are covered, test their eligibility and allocation under the same plan terms before treating the owner amount as final.

Record the tax year, deposit date, account receiving the funds, and the return on which the deduction is expected to appear. This prevents a contribution from being deducted in the wrong period or recorded as a shareholder distribution. Keep the plan document and provider confirmation with the calculation.

If the final payroll changes, rerun the workpaper before funding the balance. A contribution calculation based on a preliminary wage figure can become inaccurate after a bonus, correction, or amended payroll report.

Continue with the category hub, second related guide, and third related guide for the connected workflow.

Steady can help reconcile payroll, shareholder activity, and the year-end contribution schedule before the return is prepared. See business tax preparation support.