SEP IRA vs SIMPLE IRA: Retirement Plans for Small Business Owners

SEP IRA: Maximum Simplicity, High Limits

The SEP IRA (Simplified Employee Pension) is designed for self-employed individuals, sole proprietors, freelancers, and small businesses with 1 to 10 employees. Contributions are made by the employer only — employees cannot contribute their own money. For 2024, you can contribute up to the lesser of 25% of compensation (20% for self-employed individuals) or $69,000. The key trade-off: you must contribute the same percentage for all eligible employees (age 21+, worked 3 of last 5 years, earned $750+). This can become expensive as you hire more people. You can skip contributions in lean years, and contributions are deductible up to the tax filing deadline plus extensions (October 15). Self-employment tax strategies →

SIMPLE IRA: Lower Limits, Employee Participation

The SIMPLE IRA (Savings Incentive Match Plan for Employees) works well for businesses with 100 or fewer employees. Employees can defer up to $16,000 per year (2024) plus an additional $3,500 catch-up for those age 50 and older. The employer must contribute either a dollar-for-dollar match up to 3% of compensation or a flat 2% nonelective contribution for all eligible employees. Unlike the SEP IRA, contributions are mandatory — you cannot skip years. The trade-off is that SIMPLE IRAs allow employees to save for retirement themselves, making them a better employee benefit. However, early withdrawals within the first two years face a 25% penalty instead of the standard 10%. Build your full retirement strategy →

Solo 401(k): When Neither Plan Is Enough

For self-employed individuals with no employees other than a spouse, the Solo 401(k) often beats both SEP and SIMPLE IRAs. It combines employee deferrals (up to $23,000, or $30,500 with catch-up) with employer profit-sharing (up to 25% of compensation) for a total of up to $69,000 in 2024. It also allows Roth contributions and loans. The main drawbacks are slightly more paperwork and an annual Form 5500-EZ filing once assets exceed $250,000. For most solopreneurs earning $50,000 or more, the Solo 401(k) is the optimal choice. Backdoor Roth IRA strategy →

Deadlines, Setup, and Administrative Costs

SEP IRAs can be set up and funded as late as the tax filing deadline, including extensions (October 15 for most filers). SIMPLE IRAs must be set up by October 1 of the plan year (or by the date you become a new business). Both plans are simple to establish — the SEP IRA uses IRS Form 5305-SEP (one page) and the SIMPLE IRA uses Form 5304-SIMPLE or 5305-SIMPLE. Administrative costs are minimal: most brokerages charge nothing to set up or maintain these accounts. Neither plan requires annual IRS Form 5500 filing unless the plan covers certain types of investments or grows very large. This makes them dramatically cheaper and simpler than a traditional 401(k).

What is the difference between a SEP IRA and a Solo 401(k)?

The Solo 401(k) allows higher total contributions than a SEP IRA in most cases. For 2024, a Solo 401(k) allows up to $69,000 ($23,000 employee deferral plus up to 25% profit-sharing). A SEP IRA allows up to the lesser of 25% of compensation or $69,000, but only the employer contributes — no employee deferrals. The Solo 401(k) also allows Roth contributions and loans; the SEP IRA does not. For most self-employed individuals earning over $50,000, the Solo 401(k) is the better choice.

Can I have a SEP IRA and a Roth IRA?

Yes, you can have both a SEP IRA and a Roth IRA. The SEP IRA has its own contribution limits independent of your Roth IRA limits. However, if you also have a Solo 401(k) with Roth deferrals, the combined employee deferral limit of $23,000 applies across all accounts. The SEP IRA contributions are pre-tax and reduce your adjusted gross income, which may increase your eligibility for Roth IRA contributions if you are near the income phase-out range. This combination can be an effective tax strategy for high earners.

When is a SIMPLE IRA better than a 401(k)?

The SIMPLE IRA is better than a 401(k) when you want the lowest possible administrative burden and cost. There is no annual Form 5500 filing requirement, setup takes one business day, and most brokerages charge no fees. For businesses with fewer than 100 employees, the SIMPLE IRA is significantly cheaper than a 401(k) and requires no nondiscrimination testing. The main downside is the lower contribution limit ($16,000 vs $23,000 for a 401(k)) and mandatory employer contributions. If you want to maximize your own savings as a business owner, a 401(k) or SEP IRA is better.

Do I have to contribute for my employees?

With a SEP IRA, yes — you must contribute the same percentage of compensation for all eligible employees as you contribute for yourself. This is the main reason business owners with many employees choose SIMPLE IRAs or 401(k)s instead. With a SIMPLE IRA, you must provide either a 3% match or a 2% nonelective contribution, but employees can choose not to participate. The SIMPLE IRA employer contribution is capped per employee and is generally much lower than an equivalent SEP IRA contribution when you are trying to maximize your own savings.

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