10.5 Employer Tax Benefits of SEP and SIMPLE Plans: Deductions, Timing, and Credits
Key Takeaways
An employer may deduct SEP contributions up to 25% of participants' compensation, capped at $72,000 per participant for 2026.
SEP and SIMPLE employer contributions made by the tax return due date, including extensions, can be deducted for that year.
The startup cost credit is 100% of qualified costs for employers with 50 or fewer employees, up to $5,000 a year.
The employer contribution credit is up to $1,000 per employee, phasing from 100% in years 1-2 to 25% in year 5.
Employer SEP and SIMPLE contributions are not subject to FICA or FUTA, but SIMPLE salary reductions are.
Why Employers Choose SEPs and SIMPLEs
The second task in Domain 7 is employer tax benefits. Small business owners usually ask a bank three questions: How much can I deduct? When must I deposit to get the deduction? What will the government pay me to start a plan? The answers come from IRC §§ 404(h) and 404(m), the payroll-tax rules, and the credits in IRC §§ 45E and 45T, which IRS Publication 560 and the Form 8881 instructions explain.
Deducting SEP Contributions
Publication 560 limits the deduction for SEP contributions for participants to the lesser of:
- The contributions made (including any carryover of earlier nondeductible excess contributions); or
- 25% of the compensation paid to participants from the business that maintains the plan, with each participant's compensation limited to $350,000 for 2025 and $360,000 for 2026, and each participant's contribution limited to $70,000 for 2025 and $72,000 for 2026.
Contributions above the deductible limit can be carried over and deducted in later years, although they may face the 10% nondeductible-contribution excise tax for employer plans.
Timing. Contributions for a year count if they are made by the due date of the employer's tax return, including extensions. For a calendar-year SEP, a fiscal-year employer deducts the contributions on the return for the tax year within which the calendar year ends.
Where the deduction goes. A business deducts contributions for its common-law employees on its own return (Schedule C, Schedule F, Form 1065, Form 1120, or Form 1120-S). A sole proprietor or partner deducts contributions for themselves on Schedule 1 (Form 1040), line 16, not as a business expense, using the reduced self-employed rate (20% for a 25% plan).
Deducting SIMPLE IRA Contributions
- Employer matching or nonelective contributions are deductible for the tax year with or within which the calendar year of the plan ends, if they are made by the due date of the employer's return, including extensions (IRC § 404(m)).
- Salary reduction contributions are part of the employee's compensation, which the employer already deducts as wages. They must be deposited under the Department of Labor timing rules discussed in Section 10.2, not by the tax return due date.
Payroll-Tax Savings
| Contribution | Federal income tax withholding | FICA (Social Security and Medicare) | FUTA |
|---|---|---|---|
| Employer SEP or SIMPLE contribution (pre-tax) | Not wages | Not wages (IRC § 3121(a)(5)(C), (H)) | Not wages |
| Employer contribution to a Roth SEP or Roth SIMPLE IRA | Not wages (no withholding) | Not wages | Not wages |
| SIMPLE salary reduction (pre-tax) | Excluded from income tax wages | Subject to FICA | Subject to FUTA |
| SIMPLE salary reduction (Roth) | Subject to withholding | Subject to FICA | Subject to FUTA |
Because employer SEP and SIMPLE contributions escape FICA and FUTA, a dollar paid as a retirement contribution can cost the employer less than a dollar paid as salary.
Federal Credits for Starting a Plan (Form 8881)
These credits are available for a "qualified employer plan" as defined in IRC § 4972(d), which includes SEP and SIMPLE IRA plans.
Eligible Employer
The employer generally must have had no more than 100 employees who received at least $5,000 of compensation in the preceding year, and it may not have maintained a qualified employer plan for substantially the same employees during the 3 tax years before the plan's first effective year.
1. Small Employer Pension Plan Startup Cost Credit (IRC § 45E)
- Rate: 100% of qualified startup costs for employers with 50 or fewer employees (SECURE 2.0); 50% for employers with 51–100 employees.
- Cap: the greater of $500 or the lesser of (i) $250 for each non-highly compensated employee eligible to participate, or (ii) $5,000.
- Period: the first credit year and the two following years. An employer may elect to treat the year before the plan's effective year as the first credit year.
- Qualified startup costs include costs to set up and administer the plan and to educate employees about it.
2. Employer Contribution Credit (SECURE 2.0, also IRC § 45E)
- Up to $1,000 per employee of employer contributions (not elective deferrals) to a defined contribution plan, including a SEP or SIMPLE IRA.
- Applicable percentage: 100% in years 1 and 2, 75% in year 3, 50% in year 4, and 25% in year 5.
- The percentage is reduced by 2 percentage points for each employee over 50 in the preceding year, so it phases out at 100 employees.
- No credit for contributions on behalf of employees whose FICA wages exceed $105,000 for 2025 or $110,000 for 2026 (indexed).
3. Small Employer Auto-Enrollment Credit (IRC § 45T)
An eligible employer that adds an eligible automatic contribution arrangement to a qualified employer plan receives $500 a year for 3 years.
No double benefit: the employer must reduce its deduction for startup costs or employer contributions by the amount of the corresponding credit.
Reduced Administrative Cost
A SEP set up on Form 5305-SEP and a SIMPLE IRA plan are exempt from the Form 5500 annual reporting that qualified plans file. A SIMPLE IRA plan is also exempt from nondiscrimination and top-heavy testing, and a SEP that contributes the same percentage of pay for everyone avoids most testing work. Lower ongoing cost is an indirect tax benefit that often decides the choice for very small employers.
Bank Operations Scenario: Advising a New Plan Sponsor
Coastal Dental, a calendar-year S corporation with 12 employees (10 of them non-highly compensated), adopts a SIMPLE IRA effective January 1, 2026 with a 3% match. It pays $2,200 in 2026 setup and administration fees, and it has never had a retirement plan.
- Startup credit: Coastal has 50 or fewer employees, so the rate is 100%. Its cap is the greater of $500 or the lesser of $2,500 (10 × $250) or $5,000, which is $2,500. The 2026 credit is $2,200, and its deduction for those fees is reduced by $2,200.
- Employer contribution credit: For each employee earning $110,000 or less in 2026 FICA wages, up to $1,000 of the matching contribution qualifies at 100% in year 1.
- Deduction timing: The matching contributions for 2026 are deductible for 2026 if deposited by the extended due date of Coastal's 2026 return; salary reductions must be deposited under the DOL rules.
The bank's IRA specialist explains these rules from Publication 560 and the Form 8881 instructions and refers the owner to the practice's CPA to claim the credits.
A sole proprietor with no employees contributes to her own SEP IRA. Where does she deduct the contribution for herself?
On Schedule C as a business expense, the same way she would for a common-law employee.
On Schedule 1 (Form 1040), line 16, as a deduction for self-employed SEP contributions.
On Schedule A as an itemized deduction subject to the 2% floor.
Nowhere, because contributions an owner makes for herself are never deductible.
An employer with 30 employees, none of whom has been covered by any retirement plan, adopts its first SEP and pays $3,000 of qualified startup costs in the first year. Ten employees are eligible non-highly compensated employees. What is the maximum startup cost credit for that year?
$500, because the credit is a flat $500 for every eligible small employer.
$1,500, because the credit is 50% of qualified startup costs for every employer.
$5,000, because an employer with 50 or fewer employees receives the full annual cap.
$2,500, because the cap is the lesser of $250 per eligible NHCE or $5,000, and the rate is 100%.
A SIMPLE IRA participant elects $500 per month of pre-tax salary reductions, and the employer adds a 3% match. How are the two contributions treated for payroll taxes?
The salary reductions are subject to FICA and FUTA, while the employer match is not.
Both contributions are exempt from FICA and FUTA because both go into an IRA.
Both contributions are subject to FICA and FUTA because SIMPLE plans are not qualified plans.
The employer match is subject to FICA, while the salary reductions are not.
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