
SEP vs. SIMPLE vs. Qualified Plans: How to Choose a Retirement Plan When You Have Employees
IRS Publication 560 frames the employer choice as SEP vs. SIMPLE vs. qualified plan — compare uniformity, mandatory contributions, and admin cost.
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Savings Incentive Match Plan for Employees setup, limits, and employer requirements

IRS Publication 560 frames the employer choice as SEP vs. SIMPLE vs. qualified plan — compare uniformity, mandatory contributions, and admin cost.

Terminating a 401(k), SEP, or SIMPLE IRA requires 100% vesting, full asset distribution, and a final Form 5500 due seven months after the last payout.

34% of U.S. small business owners have no retirement plan, and more than 80% of a typical owner's net worth sits inside the business. This guide compares the SEP IRA, Solo 401(k), and SIMPLE IRA at 2026 limits ($72,000, $24,500 deferral, $17,000), explains the SECURE 2.0 credits worth up to $5,000 a year for three years, and gives a five-step plan to start saving this quarter.

SECURE 2.0 gives small employers three stackable federal tax credits for starting a retirement plan — up to $5,000 per year for three years in startup costs, up to $1,000 per eligible employee in contribution credits, and a flat $500 per year for auto-enrollment — all claimed on IRS Form 8881. Here's who qualifies, how the five-year phasedown works, and how the credits compare against state auto-IRA mandates in 2026.

Massachusetts's House passed the Secure Choice Savings Program 148-2 on July 8, 2026, mandating auto-enrollment Roth IRAs for employers with 25+ workers — 6% default contributions, $250-per-employee penalties, and a qualifying-plan exemption small businesses can use to opt out entirely.

For 2026 the standard SIMPLE IRA elective deferral limit is $17,000, but employers with 25 or fewer employees (or 26-100 that raise their match) get an enhanced $18,100 limit under SECURE 2.0 — and a rounding quirk means the enhanced-tier catch-up contribution is actually lower than the standard one.

Compare the three most popular small business retirement plans—401(k), SEP IRA, and SIMPLE IRA—with 2026 contribution limits, pros and cons, and a decision framework to find the best fit for your business.