SEP IRA vs. SIMPLE IRA: Which One Fits Your Business in 2026?

A SEP-IRA is funded solely by the employer. You fund it with up to 25% of each employee's pay, and your employees contribute nothing. A SIMPLE IRA operates inversely: employees save from their own paychecks (up to $17,000 per year in 2026) and employers are required to add a small amount, either a 3% match or 2% for everyone. Generally speaking, if you do not employ anyone and your profits are irregular, then the SEP will usually provide more flexibility than the SIMPLE IRA. As soon as you hire at least one employee who would like to be able to save some of his/her money, then the SIMPLE IRA will generally cost less for you and be advantageous for them.

How does each plan work?

A SEP IRA (Simplified Employee Pension) is a type of profit-sharing arrangement: one time per year, usually when the company closes its books, you determine what percentage of their compensation will be contributed by the company and that decision applies to all eligible employees' IRAs as well. A SIMPLE IRA (Savings Incentive Match Plan for Employees) is a salary-deferral plan defined under Section 408(p) of the Internal Revenue Code. Therefore, contributions flow into employee accounts via payroll on a check-by-check basis throughout the year, either pre-tax or post-tax/Roth due to SECURE 2.0 law changes, with the employer contribution following what each employee chooses to save.^[3] The major difference between these two plans lies in how funds are moved: twenty-six small decisions made over twelve months versus one large decision made annually. The process for establishing this plan is explained in detail within section What Is a SIMPLE IRA?

What is the difference between SEP and SIMPLE IRA contribution limits?

The distinction lies in the ownership of each dollar invested into the account, and therefore, whose dollars are being utilized for funding purposes. Every single dollar under the SEP's increased limit is the employer's money which can be funded at their discretion.^[1] The employee owns most of the space within a SIMPLE plan. It is up to the employee annually to decide how much of their own salary they would like to contribute as a deferral prior to adding the required amount from their employer.^[2] Therefore, the SEP will favor high-earning employees that work for a successful company while the SIMPLE favors ordinary wage earners looking for control over their own payroll deductions with regards to their contribution limits. A key difference between the two plans exists due to differing caps on contributions:

A single owner who earns $200,000 can save much more using a SEP. But an owner of a business with four employees, who wishes to protect $15,000 of his own pay, cannot take advantage of the protection available through the use of a SEP at all, but rather will have to defer those dollars, and that is where the SIMPLE IRA comes into play. For full SIMPLE IRA numbers see our 2026 contribution limits guide.

What does each plan cost you with employees?

A SEP IRA is based on an employer's base percent of each employee's compensation (every eligible employee is included), a SIMPLE IRA limits employer contributions to approximately 3% of payroll (and, under the match option, only for employees that elect to participate in the plan). The percentage of any SEP contribution the employer provides themselves must be applied to each eligible participant as well. In a SIMPLE IRA, participants fund their own retirement accounts. Thus, employers' mandatory contributions remain small and consistent.

Owners nearly always land on the SIMPLE when hiring employees, in order to create an opportunity to control what they pay toward employee retirement, and also maximize how much of their own money they will have available for retirement.

When is the SEP IRA contribution deadline, and how does the SIMPLE IRA differ?

SEP IRAs are due by the last day of filing for your business tax return (and any extension) with regard to the preceding year. An employer may establish a SEP as late as this date, and if one was created in April it could have received prior-year contributions.^[1] By contrast, SIMPLE IRAs must generally be put into place no later than October 1 for the current year and employers will contribute throughout the year via payroll. This is why accountants typically recommend SEP plans at tax time. If you wish to implement a plan that is tied to payroll, you should act before fall. The deadlines are:

• SEP IRA: established and funded by your business tax filing deadline, which includes any extensions you may have gotten, for the preceding year. This is an example of the "I just found out my accountant says I owe too much in taxes," type plan.
• SIMPLE IRA: establish by October 1 of that year to be counted for this year (all new businesses established after October 1 will have an exception). Deposits are due within 7 business days of each pay date. An annual notice shall also be distributed to employees by November 1 of each year. For the complete list, see SIMPLE IRA Rules for Employers.

Neither plan files for Form 5500 or does nondiscrimination testing (why both outperform a 401(k) in administration costs for smaller team environments). For this reason, see SIMPLE IRA vs. 401(k).

Which should you choose?

Choose SEP-IRA when you are an independent with no workers and desire to maximize your employer contributions (especially if you wish to determine how much money is contributed after the year ends). Choose SIMPLE-IRA as soon as you hire at least one worker that wishes to save some or all of his/her own salary. Since the SIMPLE will keep your costs associated with allowing your employees to contribute very close to 3% of payroll in comparison to a SEP which will make your generosity toward them into a mandatory expense for all, this makes sense. In addition, at modest incomes the fixed $17,000 allowed under the SIMPLE can provide greater savings benefits than the SEP's percentage.

You are both exempt from CalSavers and similar state retirement programs under these two plans. In addition, you can graduate later: A sponsor of a SEP plan or SIMPLE plan can transition into a 401(k) once the owner's deferrals exceed the $17,000 cap for SIMPLE plans or if the team grows past about 25 people.

The Bottom Line

A SEP IRA is solely funded with employer monies, in an amount of up to 25% of pay, it is ideal for owner-only businesses wishing to contribute large amounts of money into a retirement plan on a retroactive basis. A SIMPLE IRA allows employee deferrals up to $17,000 while capping your cost as the business owner at approximately 3% of payroll, thus generally providing an advantage over a SEP when you have staff. Determine if you have employees, and then make sure you meet the October 1 SIMPLE deadline prior to fall.

This guide is educational and summarizes IRS rules for SIMPLE IRA plans. It is not investment, legal, or tax advice. Your plan documents and current IRS limits control. Talk to your tax advisor about your business's circumstances.