If you earn self-employment income and you are not using a SEP IRA, you are leaving one of the most generous tax deductions in the U.S. tax code untouched. In 2026, you can shelter up to $70,000 per year — versus the $7,000 cap on a regular Roth or traditional IRA. The setup takes less time than filing a tax extension. Here is everything you need to know.
What changed in 2026
- The contribution ceiling rose to $70,000 (up from prior years), tracking IRS cost-of-living adjustments. Verify the exact figure at IRS.gov each year.
- Digital account opening became fully instant at most major brokerages — no paper forms or medallion signatures required.
- SECURE 2.0 provisions that took full effect in 2025–2026 loosened some employer-plan rules, but SEP IRA mechanics stayed largely the same — making it still the easiest retirement vehicle for solo earners.
What a SEP IRA actually is
A SEP (Simplified Employee Pension) IRA is a traditional IRA with a much higher contribution limit, designed for self-employed people and small business owners. The employer — which is you, if you are self-employed — makes all contributions. There are no employee salary deferrals like a 401(k).
Key mechanics:
- Contributions come from the employer (you), not payroll deductions.
- The deadline to contribute is your tax filing deadline plus extensions (October 15 for sole proprietors).
- Funds grow tax-deferred; withdrawals in retirement are taxed as ordinary income.
- Required minimum distributions begin at age 73 under current law.
Who qualifies
| Business type |
Qualifies? |
| Sole proprietor / freelancer |
Yes |
| Single-member LLC |
Yes |
| Partnership |
Yes — each partner contributes for themselves |
| S-corp owner with salary |
Yes — based on W-2 wages from the S-corp |
| Business with W-2 employees |
Yes, but must contribute same % for eligible employees |
| W-2 employee with no side income |
No |
The employee rule is the catch: if you have staff who worked for you 3 of the last 5 years, earned over a threshold, and are 21+, they are eligible — and you must fund their accounts at the same percentage rate as yours.
2026 contribution limits
| Factor |
2026 figure |
| Maximum contribution |
$70,000 (or 25% of compensation, whichever is less) |
| For sole proprietors |
~20% of net self-employment income (after SE tax deduction) |
| Regular IRA limit |
$7,000 ($8,000 if 50+) |
| Roth IRA income phase-out (single) |
Starts ~$150,000 |
For a sole proprietor, the effective rate is ~18.6% of gross self-employment income (because you calculate it on net income after the SE tax deduction). Use Schedule SE instructions or a SEP IRA calculator before assuming a number.
How to open one
- Choose a brokerage. Fidelity, Schwab, and Vanguard all offer no-fee SEP IRAs with broad fund selections. Pick the one you already use or prefer.
- Apply online. Select "SEP IRA" in the account type menu. You will need your SSN or EIN, business name, and contact details. No employer identification number is required for sole proprietors.
- Fund the account. Link a bank account and transfer. You can fund as a lump sum any time up to your tax deadline.
- Invest. Choose a target-date fund or build a simple index fund portfolio. Contributions just sitting in cash are not invested until you choose.
- Note the deadline. You can open and contribute to a SEP IRA for the prior tax year up to your extended filing deadline — unlike a 401(k), which must be established by December 31.
SEP IRA vs Solo 401(k): the real comparison
| Feature |
SEP IRA |
Solo 401(k) |
| Max contribution |
$70,000 |
$70,000 (employee + employer) |
| Roth option |
No |
Yes (Roth solo 401k) |
| Loans allowed |
No |
Yes |
| Admin complexity |
Very low |
Low–moderate |
| Best for |
High-income earners wanting simplicity |
Earners wanting Roth or loan access |
| Employees allowed |
Complicated |
No W-2 employees except spouse |
At high income levels both vehicles can reach the same ceiling. At lower net income, the solo 401(k) can contribute more because of the employee salary-deferral component. See How to open a Solo 401k in 2026.
How to pick the right year to maximize
Your SEP IRA contribution reduces your net taxable self-employment income dollar for dollar. In a high-income year, max it. In a low-income year, the deduction is smaller — consider whether a Roth conversion in that year makes more sense. See How to do a Roth conversion in 2026.
Common mistakes
Waiting until April to open it. You can open and fund a SEP IRA for last tax year all the way up to your extended deadline (October 15). Many people miss this window by not knowing they have it.
Calculating contributions incorrectly. Sole proprietors use a reduced rate (~18.6% of gross SE income), not a flat 25%. Get this wrong and you may over-contribute, which triggers a 10% excise tax.
Not investing after depositing. Money in a SEP IRA sitting in a default money-market sweep does not grow at retirement rates. Choose your funds.
Forgetting the employee rule. If you hire staff later, your SEP IRA contribution rate applies to them too. This surprises many growing freelancers.
What to skip
- SEP IRAs at banks offering only CDs — you lose the equity growth that makes the tax shelter worthwhile long-term.
- Third-party "SEP IRA plan document" services charging setup fees — a brokerage handles this for free.
- Waiting for "a good year" to open it — even a small contribution in year one starts the clock on your retirement assets.
FAQ
Can I have a SEP IRA and a traditional or Roth IRA?
Yes. You can contribute to both in the same year, subject to each account's own rules and income limits.
Can I contribute to a SEP IRA if I also have a full-time W-2 job?
Yes, as long as you have net self-employment income from a side business or freelance work.
What is the deadline to open a SEP IRA for 2025 taxes?
Your 2025 tax filing deadline including extensions — typically October 15, 2026 for individuals with an extension.
Are SEP IRA withdrawals taxed?
Yes, as ordinary income in retirement — the same as a traditional IRA or 401(k). Early withdrawals before 59½ also incur a 10% penalty.
Where to go next
See How to open a Solo 401k in 2026, How to do a Roth conversion in 2026, and How to harvest tax losses yourself in 2026.