A SEP IRA (Simplified Employee Pension Individual Retirement Account) is a tax-deferred retirement account designed for self-employed individuals and small business owners. Its defining feature is contribution limits that dwarf those of a standard IRA: up to $72,000 in 2026, compared to $7,500 for a regular IRA. That difference — nearly 10x — makes it one of the most powerful tax-deferral tools available to freelancers, independent contractors, and business owners.
Who can open a SEP IRA
Any self-employed individual or business owner can establish a SEP IRA, regardless of business structure:
- Freelancers and independent contractors (1099 income)
- Sole proprietors
- Single-member LLCs
- S-corporation and C-corporation owners
- Partners in partnerships
You can open a SEP IRA even if you also have a W-2 job with a 401(k). The SEP IRA contribution limit is separate from your 401(k) limit, meaning high earners with a side business can layer both.
2026 contribution limits
The SEP IRA limit is the lesser of $72,000 or 25% of net self-employment compensation. According to the IRS, the compensation cap used in calculations is $360,000 for 2026 — meaning 25% × $360,000 = $90,000, but the dollar cap of $72,000 applies first.
| SEP IRA | Regular IRA | |
|---|---|---|
| Maximum contribution (2026) | $72,000 | $7,500 |
| Catch-up contribution (age 50+) | None | $1,100 |
| Contribution formula | Lesser of $72,000 or 25% of comp | Up to limit or earned income |
| Who contributes | Employer only | Account holder |
| Tax treatment | Pre-tax (deductible) | Pre-tax or after-tax |
For self-employed individuals, “compensation” for the 25% calculation means net self-employment income after subtracting the deductible half of self-employment taxes. The IRS provides a worksheet in Publication 560 for this calculation.
What you can actually contribute at different income levels
| Net self-employment income | Maximum SEP IRA contribution |
|---|---|
| $40,000 | $7,268 (approx. 18.6% of net, due to SE tax deduction) |
| $80,000 | $14,536 |
| $120,000 | $21,804 |
| $200,000 | $36,340 |
| $288,000+ | $72,000 (maximum) |
The effective rate for self-employed individuals is closer to 18.6% of net income rather than exactly 25%, because the 25% is applied after subtracting half of self-employment taxes. To reach the full $72,000 cap, you need net compensation of at least $288,000.
How a SEP IRA works
A SEP IRA operates identically to a traditional IRA once opened:
- Contributions are tax-deductible — they reduce your adjusted gross income for the year
- Money grows tax-deferred inside the account
- Withdrawals in retirement are taxed as ordinary income
- Early withdrawals before age 59½ trigger a 10% penalty plus income tax
- Required minimum distributions (RMDs) begin at age 73
One important constraint: if you have employees, you must contribute the same percentage of compensation to their SEP IRAs as you contribute to your own. This is why SEP IRAs work best for sole proprietors or very small businesses where the owner is the only employee.
How to set one up
Opening a SEP IRA is among the simplest retirement account setups available:
- Choose a brokerage — Fidelity, Vanguard, and Charles Schwab all offer SEP IRAs with no account fees and no minimum balance requirement
- Complete IRS Form 5305-SEP or use the brokerage’s pre-approved plan documents (most brokerages provide these)
- Make contributions any time before your tax filing deadline, including extensions
There is no annual reporting to the IRS for a SEP IRA (unlike a 401(k) plan, which requires Form 5500 once assets exceed $250,000). The simplicity is a genuine advantage for busy self-employed individuals.
SEP IRA vs. Solo 401(k): head-to-head
For self-employed individuals with no employees, the Solo 401(k) is the main alternative worth considering:
| SEP IRA | Solo 401(k) | |
|---|---|---|
| Max contribution (2026) | $72,000 | Up to $72,000 (employee + employer) |
| Roth option | No | Yes (at most brokerages) |
| Loan option | No | Yes |
| Employee contributions | No | Yes ($24,500 elective deferral) |
| Administrative burden | Minimal (no Form 5500 typically) | Slightly more (Form 5500-EZ once assets exceed $250K) |
| Best for | High earners, simplicity seekers | Lower incomes (higher relative contributions), Roth access seekers |
| Employees allowed | Yes (but you must fund their accounts) | No (only owner and spouse) |
The critical difference at lower income levels: a Solo 401(k) allows you to contribute as an employee ($24,500 in 2026) plus as an employer (up to 25% of compensation), which means you can max out at a much lower income level than with a SEP IRA. For example, at $60,000 in net self-employment income, a Solo 401(k) allows roughly $35,000 in contributions while a SEP IRA would cap you around $11,000.
Contribution deadline flexibility
Unlike a regular IRA with a firm April 15 deadline, SEP IRA contributions can be made up to your tax filing deadline including extensions. If you file an extension, your contribution deadline extends to October 15 of the following year. This is particularly valuable for self-employed individuals whose annual income is variable and hard to project before year-end.
Common mistakes
Forgetting to account for the SE tax deduction in the contribution calculation. The 25% applies to net compensation after deducting half of self-employment taxes — not directly to gross self-employment income. Skipping this step leads to over-contributing, which triggers IRS penalties.
Opening a SEP IRA with employees and not funding their accounts. The uniform contribution percentage rule is strict: if you contribute 15% of compensation to your own SEP IRA, you must contribute 15% for every eligible employee. Failing to do so disqualifies the plan.
Assuming a SEP IRA offers a Roth option. It does not. All contributions are pre-tax. If after-tax growth is important to you, a Solo 401(k) with a Roth component is the better structure.
Missing the extended deadline. Many self-employed individuals assume they must contribute by April 15. Because SEP IRAs follow the extended filing deadline, waiting until October 15 is allowed — giving you more time to determine how much cash flow you can commit.
Getting started
If you have self-employment income, open a SEP IRA at Fidelity, Vanguard, or Schwab this week. All three allow online setup in under 30 minutes with no fees. Calculate your maximum contribution using IRS Publication 560’s self-employed deduction worksheet, or use one of the free online calculators provided by those brokerages. Make your contribution before you file your taxes — or before October 15 if you file an extension — and claim the deduction on Schedule 1 of your Form 1040.