A SEP IRA (Simplified Employee Pension) is a retirement account designed for self-employed individuals and small business owners. It allows much higher contributions than a traditional IRA while being simpler than a 401(k).
SEP IRA Contribution Limits (2026)
| Limit | 2026 | 2025 |
|---|---|---|
| Maximum contribution | $72,000 | $70,000 |
| Percentage of compensation cap | 25% | 25% |
| Maximum eligible compensation (section 401(a)(17)) | $360,000 | $350,000 |
| Minimum compensation for employee eligibility | $800 | $750 |
| Minimum age for participation | None | None |
| Contribution deadline | Tax filing deadline (+ extensions) | Tax filing deadline (+ extensions) |
How Much Can You Actually Contribute?
For W-2 employees, the calculation is straightforward: 25% of compensation, up to $72,000, based on compensation up to the $360,000 annual cap.
For self-employed sole proprietors, it’s slightly different — you must subtract the employer-equivalent half of self-employment tax before applying the 25% rate, which works out to an effective rate of roughly 18.6% of net self-employment income (before the SEP contribution itself):
| Net Self-Employment Income | Effective Rate | Max SEP Contribution |
|---|---|---|
| $50,000 | ~18.6% | $9,294 |
| $75,000 | ~18.6% | $13,940 |
| $100,000 | ~18.6% | $18,587 |
| $150,000 | ~18.6% | $27,881 |
| $200,000 | ~18.6% | $37,174 |
| $300,000 | ~18.6% | $55,761 |
| $360,000 (compensation cap) | ~18.6% | ~$66,913 |
The 18.6% effective rate is a fixed mathematical conversion of the 25% employer rate adjusted for self-employment tax — it does not change annually. Note that for self-employed sole proprietors specifically, this formula tops out around $66,900 at the 2026 compensation cap ($360,000) — reaching the full $72,000 dollar cap isn’t achievable through the standard sole-proprietor SEP formula alone. High earners who want to reach the full $72,000 limit should compare a Solo 401(k), which reaches the cap more easily because the employee-deferral portion isn’t subject to the same self-employment-tax haircut. Confirm your exact maximum with a CPA using IRS worksheets in Publication 560.
SEP IRA Rules
| Rule | Detail |
|---|---|
| Who can open | Any business owner or self-employed person |
| Employee eligibility | Age 21+, worked 3 of last 5 years, earned $800+ (2026) |
| Contribution source | Employer only (not employee) |
| Tax treatment | Contributions are tax-deductible; growth is tax-deferred |
| RMD age | 73 (rising to 75 by 2033 under SECURE 2.0) |
| Early withdrawal penalty | 10% before age 59½ (plus income tax) |
| Roth option | No |
| Loans | No |
| Contribution deadline | Tax filing deadline including extensions |
| IRA aggregation | Yes, counts with other traditional IRAs for Roth conversion |
SEP IRA vs. Solo 401(k) vs. SIMPLE IRA
| Feature | SEP IRA | Solo 401(k) | SIMPLE IRA |
|---|---|---|---|
| Max contribution (2026) | $72,000 | $72,000 total (employee deferral up to $24,500 counted within that total) | $17,000 + required 2-3% employer match |
| Employee contributions | No | Yes (up to $24,500, within the $72,000 total) | Yes ($17,000) |
| Employer contributions | Up to 25% of comp | Up to 25% of comp, combined with employee deferral toward $72,000 | Required 2-3% match |
| Roth option | No | Yes | No |
| Catch-up (50-59, 64+) | No | $8,000 | $4,000 |
| Super catch-up (60-63) | No | $11,250 | $5,250 |
| Loan provision | No | Yes (up to $50K) | No |
| Employees allowed | Yes (must contribute for all) | No (solo or spouse only) | Yes |
| Setup complexity | Very easy | Moderate | Easy |
| Annual filing (Form 5500) | No | Yes (if >$250K) | No |
| Allows Roth conversions | Via rollover to Roth IRA | In-plan Roth conversion | Via rollover |
| Backdoor Roth IRA friendly | No (pro-rata rule) | Yes | No (pro-rata rule) |
When Each Account Wins
| Scenario | Best Choice | Why |
|---|---|---|
| Self-employed, no employees, want max savings | Solo 401(k) | Higher effective limits at most income levels, Roth option, loans |
| Self-employed with employees | SEP IRA or SIMPLE IRA | Solo 401(k) doesn’t allow employees |
| Want simplest setup possible | SEP IRA | Open at any brokerage in minutes |
| High earner, self-employed, wants the full $72K cap | Solo 401(k) | Reaches the cap more easily than the SEP sole-proprietor formula |
| Want to do Backdoor Roth IRA too | Solo 401(k) | SEP IRA triggers pro-rata rule |
How to Open a SEP IRA
- Choose a brokerage (Fidelity, Schwab, Vanguard — all free)
- Complete IRS Form 5305-SEP (most brokerages do this for you)
- Fund the account before your tax filing deadline
- Invest the contributions (don’t leave cash sitting idle)
- Report on your tax return (Schedule C deduction for self-employed)
SEP IRA Tax Benefits
| Benefit | Detail |
|---|---|
| Contribution deduction | Above-the-line deduction (reduces AGI) |
| Self-employed tax deduction | Separate from the 50% SE tax deduction |
| Tax-deferred growth | No taxes on gains until withdrawal |
| State tax deduction | Most states allow (check yours) |
| Pass-through deduction (QBI) | SEP contributions reduce QBI for 20% deduction |
Example Tax Savings (2026 brackets)
| Income (taxable) | SEP Contribution | Tax Bracket | Federal Tax Savings |
|---|---|---|---|
| $100,000 | $18,587 | 22% | $4,089 |
| $150,000 | $27,881 | 24% | $6,691 |
| $200,000 | $37,174 | 24% | $8,922 |
Bracket assignment uses 2026 single-filer thresholds (22% bracket: $50,400–$105,700; 24% bracket: $105,700–$201,775). State tax savings will add to these federal figures and vary by state.
SEP IRA Mistakes to Avoid
- Not contributing for eligible employees: If you have employees who meet the criteria, you MUST contribute the same percentage for them
- Missing the contribution deadline: Must contribute by tax filing deadline (including extensions — file an extension if needed)
- Leaving contributions in cash: Invest immediately; cash drag hurts long-term returns
- Ignoring the Solo 401(k): Often a better option if you’re truly solo, especially for reaching the full dollar cap
- Forgetting the pro-rata rule: SEP IRA balance affects Backdoor Roth IRA conversions
For more IRA guidance, see SIMPLE IRA guide and IRA contribution limits. Return to the IRA hub.
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