A SEP IRA for S corp lets the corporation make retirement contributions for eligible employees, including shareholder-employees. The key rule is that an owner's contribution is based on W-2 compensation, not S corporation profit, draws, or shareholder distributions.
Key Takeaways
- An S corporation can establish a SEP IRA and contribute for eligible shareholder-employees and other employees.
- The maximum contribution rate is generally 25% of eligible W-2 compensation, subject to the IRS annual dollar limit.
- Business profit, pass-through income, draws, and shareholder distributions do not support an owner's SEP contribution.
- The corporation generally must use the same contribution percentage for every eligible employee.
- Only the employer makes SEP contributions. A SEP does not permit employee salary deferrals.
- The S corporation generally deducts its contributions on Form 1120-S and excludes allowable contributions from employees' federal wages.
Can an S Corp Have a SEP IRA?
Yes, an S corporation can establish and contribute to a SEP IRA. SEP stands for Simplified Employee Pension. The employer adopts a SEP plan, and contributions go into traditional individual retirement accounts established for participating employees.
A shareholder who performs services for the corporation can participate as an employee. The owner must receive W-2 wages that qualify as compensation under the plan. Owning stock, receiving a Schedule K-1, or taking distributions does not by itself create SEP-eligible compensation.
The S corporation controls whether to contribute in a particular year and selects the contribution percentage. It may contribute zero for a year. If it contributes, however, it generally must apply the same percentage of compensation to all employees covered by the plan. Contributions become fully vested when made, so employees immediately own the money placed in their accounts.
A SEP is an employer-funded arrangement. Shareholder-employees cannot direct part of their pay into the plan as they could with a 401(k). This distinction makes a SEP simple to administer but may limit the owner's ability to save when W-2 wages are modest.
The corporation's retirement plan does not change the underlying rules for shareholder compensation. An owner who works for the business generally must receive reasonable compensation before taking nonwage distributions. For broader context, review the tax advantages available to S corporation owners and how payroll and pass-through taxation interact.
How to Calculate a SEP Contribution for an S Corp Owner
Start with the shareholder-employee's eligible W-2 compensation from the S corporation. Do not start with net business income, taxable profit, distributions, stock basis, or the amount shown on Schedule K-1.
- Identify the owner's eligible W-2 compensation for the plan year.
- Select the employer contribution percentage, up to the percentage allowed under the plan and federal rules.
- Multiply eligible W-2 compensation by that percentage.
- Compare the result with the IRS annual contribution limit and applicable compensation cap.
- Apply the same percentage to every other eligible employee's compensation.
Assume an owner receives $100,000 in eligible W-2 wages and the corporation selects a 20% contribution rate. The preliminary SEP contribution is $20,000. A $40,000 shareholder distribution does not increase that amount. If the corporation has an eligible employee earning $50,000, a uniform 20% rate would also require a $10,000 contribution for that employee.
An owner who receives distributions but no W-2 wages generally has no S corporation compensation on which to calculate a SEP contribution. The calculation used by a sole proprietor is different because a sole proprietor uses adjusted net earnings from self-employment rather than W-2 wages.
Contribution and compensation limits can change annually. Check the IRS SEP plan guidance for the year involved before funding accounts. If payroll records are incomplete or wages require correction, resolve those issues before treating a deposit as a valid SEP contribution.
SEP IRA Rules for Eligible Employees and Equal Contributions
The plan document determines which employees participate, subject to federal limits. Under the standard IRS framework, a plan generally cannot exclude an employee who has reached age 21, performed services in at least three of the preceding five years, and received at least the applicable minimum compensation for the year. The indexed minimum is $800 for 2026.
An employer may adopt less restrictive requirements. For example, it may cover younger employees or employees with shorter service. It generally cannot use stricter conditions than the federal maximum exclusions. Certain employees covered by a collective bargaining agreement and certain nonresident aliens without U.S.-source compensation may be excluded when the applicable requirements are met.
The uniform-percentage rule can make an S corp SEP contribution more expensive than an owner initially expects. If the corporation contributes 15% for the shareholder-employee, it generally must contribute 15% of compensation for every other eligible employee. The corporation cannot contribute 15% for the owner and 5% for a covered nonowner employee.
| Worker | Who Contributes | Compensation Base | Employee Deferrals? |
|---|---|---|---|
| S corp shareholder-employee | S corporation | Eligible W-2 compensation | No |
| Nonowner S corp employee | S corporation | Eligible W-2 compensation | No |
| Sole proprietor | Self-employed owner | Adjusted net earnings from self-employment | No |
| W-2 employee without a sponsoring business | The employee's employer, if it maintains a SEP | Compensation from that employer | No SEP salary deferrals |
Before choosing a contribution rate, prepare a workforce census showing ages, service histories, compensation, ownership, and any proposed exclusions. Employee benefits can also affect shareholder tax treatment, as explained in this overview of S corporation fringe benefits.
How to Set Up the Plan and Meet the SEP Contribution Deadline
An S corporation must adopt a written SEP arrangement. Many employers use IRS Form 5305-SEP, Simplified Employee Pension, while financial institutions may offer an IRS-approved prototype document. The correct form name is Form 5305-SEP, not Form 530-SEP.
The employer completes and retains Form 5305-SEP in its records. It does not ordinarily file the form with the IRS. The corporation must provide eligible employees with required information about the plan, including a copy of the completed form when Form 5305-SEP is used. Each participating employee then establishes a SEP-IRA with a bank, brokerage, or other qualified financial institution.
The corporation can generally establish the SEP by the due date of its federal income tax return, including a valid extension. Employer contributions for a tax year are generally due by that same return deadline, including extensions. An extension gives the corporation additional time to establish and fund the plan, but it does not change which workers were eligible during the plan year.
When comparing providers such as Fidelity, Vanguard, or Merrill, evaluate account fees, investment choices, service levels, funding procedures, correction support, and the availability of individual accounts for every eligible employee. A provider holds and administers the accounts, but the S corporation remains responsible for operating the plan according to its written terms.
If your S corporation has employees, may have excluded a worker, or has operated its SEP inconsistently, you can post your legal need on UpCounsel's marketplace. An attorney can review the plan document and workforce eligibility, identify compliance concerns, and coordinate correction steps with your tax adviser or plan provider. Responses typically arrive within a day.
Where to Deduct and Report S Corp SEP Contributions
The S corporation generally deducts qualifying employer SEP contributions on its corporate return. On Form 1120-S, pension and profit-sharing plan contributions are generally entered on the line designated for pension, profit-sharing, and similar plans. Confirm the line number and instructions for the tax year being filed because forms can change.
The deduction reduces the corporation's ordinary business income. A shareholder-employee generally does not claim the corporation's employer contribution again as a personal SEP deduction. This differs from a sole proprietor, who calculates and claims a deduction under the rules for self-employed individuals.
Allowable employer SEP contributions generally are not included in the employee's federal income tax wages, Social Security wages, or Medicare wages on Form W-2. They should not be confused with taxable cash compensation. The financial institution generally reports IRA contribution information on Form 5498, and the reporting year on that form may differ from the tax year for which the corporation claims the deduction.
Keep records connecting each deposit to the applicable plan year. The file should include the plan document, employee notices, eligibility census, compensation data, selected contribution percentage, account confirmations, proof of payment, and the return on which the corporation claimed the deduction.
A SEP deduction affects pass-through business income but does not replace the separate calculation of a shareholder's stock and debt basis. See how S corporation shareholder basis is calculated when evaluating distributions, losses, and other pass-through items. Payroll tax treatment should also be reviewed separately from the plan deduction.
SEP IRA Benefits, Downsides, and Other Retirement Plans
The main SEP IRA benefits are straightforward administration, flexible annual funding, potentially substantial employer contributions, and no routine annual Form 5500 filing for a standard SEP that satisfies the applicable requirements. The corporation can adjust the contribution percentage from year to year or decide not to contribute.
The same features create tradeoffs. Employees cannot make salary deferrals, Roth SEP contributions are not part of the traditional SEP structure described here, and age-based catch-up contributions do not apply because the plan uses employer contributions. Every eligible employee generally receives the same contribution percentage, which can create a significant cost for a corporation with multiple workers. Contributions also vest immediately.
An owner-only S corporation may compare a SEP with a one-participant 401(k). A one-participant 401(k) can permit employee elective deferrals plus employer contributions, but it requires more administration and may trigger annual filing obligations after applicable conditions are met. A business with employees may compare a SEP with a SIMPLE IRA or a traditional 401(k), focusing on employee deferrals, employer funding commitments, eligibility options, testing, filing duties, and administrative cost.
No single plan is best for every S corporation. A SEP often fits a business that values simple administration and employer-controlled annual contributions. Another plan may fit better when the owner wants salary deferrals, employees want to contribute from pay, or the corporation needs more control over eligibility and contribution design.
Retirement contributions are only one part of the entity's tax picture. Review the broader taxation of an S corporation with a tax professional before changing compensation or benefit arrangements solely to increase retirement contributions.
Common SEP IRA Errors and How to Address Them
One common error is calculating the owner's contribution from S corporation profit or shareholder distributions. The correction starts with identifying eligible W-2 compensation and recalculating the permitted contribution for every covered employee.
Another error is funding the owner's account while overlooking an eligible employee. This may require a corrective employer contribution, adjusted earnings, notices, or other action. The appropriate remedy depends on the plan terms, the facts, and the correction program available when the mistake is discovered.
Excess contributions also require prompt attention. Do not simply withdraw money or reclassify a contribution without checking the applicable tax and plan rules. The financial institution, tax adviser, and benefits counsel may need to coordinate the correction and reporting.
A corporation is generally permitted to choose a zero contribution rate for a year. Problems arise when it contributes for some covered employees but not others, applies different percentages, misses the funding deadline, or fails to follow its written eligibility terms. Review payroll and employee records before deposits are released rather than trying to repair the plan afterward.
The IRS publishes a SEP Plan Fix-It Guide addressing common failures and possible correction approaches. Keep written documentation of the issue, the calculation used, communications with affected employees, payments made, and professional advice received. A correction should restore affected participants as closely as possible to the position they would have occupied if the plan had operated correctly.
Frequently Asked Questions
Can an S Corp Have a SEP IRA?
Yes, an S corporation can sponsor a SEP IRA for eligible employees, including owners who are bona fide employees. The corporation adopts the plan in its employer capacity, while each participant owns an individual account. Merely holding shares is insufficient, so a passive shareholder who performs no services and receives no employee compensation does not qualify based on ownership alone.
How Do S Corp Owners Calculate Their SEP Contributions?
S corp owners multiply eligible W-2 compensation by the corporation's uniform contribution percentage, then apply the federal limits for that year. If payroll is later corrected, the corporation should revisit the calculation because a changed wage figure may affect both the owner's contribution and the amounts owed to other eligible employees.
Where Do You Deduct SEP IRA Contributions?
The sponsoring S corporation generally claims the deduction on its business return for the tax year to which the contribution applies. The payment date and the financial institution's Form 5498 reporting year may not match the deduction year, especially when a corporation funds the contribution after year-end but before its extended return deadline.
Where Are SEP IRA Contributions Reported on Form 1120-S?
SEP contributions are generally reported in the pension, profit-sharing, and similar plans deduction area of Form 1120-S. Use the instructions for the applicable filing year rather than relying on an older line number. The contribution ordinarily reduces business income and is not separately deducted by the shareholder on the shareholder's individual return.
Can a W-2 Employee Contribute to a SEP IRA?
A W-2 employee cannot make salary-deferral contributions under a SEP plan. Because a SEP-IRA is a traditional IRA, an individual may be able to make a separate regular IRA contribution to the account, subject to the annual IRA limits and deduction rules. That personal deposit is distinct from the employer's SEP contribution and does not alter the uniform employer percentage.
What Retirement Plan Is Best for an S Corp Owner?
The best plan depends on compensation, employee count, desired savings, funding predictability, and administrative capacity. A SEP may suit an owner who prioritizes flexible employer funding, while a 401(k) may offer more contribution methods. Model the cost for every eligible employee and compare filing, testing, payroll, and professional-service requirements before adopting a plan.
