SIMPLE IRA for Small Business: Rules and 2026 Limits

TL;DR: A SIMPLE IRA is a retirement plan for a business with 100 or fewer employees. Each worker can defer up to $17,000 of pay in 2026 ($18,100 if the employer has 25 or fewer employees), and the employer must add either a dollar-for-dollar match up to 3% of pay or a flat 2% of pay for each eligible worker. It is cheaper to run than a 401(k) and lets employees contribute, which a SEP does not. The catch: you have to set the plan up by October 1, and a withdrawal in the first two years is taxed 25%, not the usual 10%.

What is a SIMPLE IRA, and who is it for?

A SIMPLE IRA (Savings Incentive Match Plan for Employees) is the retirement plan built for the stage most small-business guides skip: you have hired a few people and a SEP or Solo 401(k) no longer fits, but a full 401(k) with its annual testing is more than you want to run. The IRS describes it as "available to any small business, generally with 100 or fewer employees". Both the owner and the staff put money in, and the employer is required to chip in too.

Two features set it apart from a SEP IRA. First, employees make their own salary-reduction contributions, so a worker can save far more than the employer alone would fund. Second, the employer contribution is mandatory every year the plan is open. A SEP's is not. That trade is the point: a SIMPLE IRA buys employee participation, and the price is a guaranteed employer outlay each year the plan runs.

One rule disqualifies many businesses before they start. The IRS states plainly that an employer who offers a SIMPLE IRA "cannot have any other retirement plan". If you already run a SEP or a 401(k), you cannot also run a SIMPLE IRA in the same year. It is one plan or the other.

2026 SIMPLE IRA contribution limits

The employee salary-reduction limit for 2026 is $17,000, up from $16,500 in 2025, per IRS Notice 2025-67. A SECURE 2.0 change raises that ceiling for the smallest employers: a business with 25 or fewer employees gets an automatically higher limit of $18,100 for 2026. Larger employers, those with 26 to 100 employees, can elect the higher limit only if they also raise their employer contribution, which the statute sets out in Internal Revenue Code section 408(p).

The age-based catch-up contributions come from the IRS contribution-limits page and apply only if your plan permits them. Note the quirk the IRS release spells out: the standard age-50 catch-up rose to $4,000 for 2026, but in the higher-limit plans it stays at $3,850, while the ages 60 to 63 catch-up is $5,250 across the board.

One more ceiling matters on the employer side. The 2% nonelective contribution, covered next, is figured on each employee's compensation only up to $360,000 for 2026.

Employer contributions: the 3% match vs the 2% nonelective

Every year the plan is open, the employer must contribute one of two ways, and it picks which.

The matching contribution. The default is a dollar-for-dollar match on what the employee defers, up to 3% of that employee's pay. The IRS lets you cut the match below 3% in a pinch, "but it must be at least 1% and for no more than 2 out of 5 years," with notice to employees first. A worker who saves nothing costs you nothing under the match.

The nonelective contribution. Instead of matching, you can contribute a flat 2% of each eligible worker's compensation, and you must pay it whether or not the employee defers a cent of their own.

Take a bakery whose eligible staff each earn $50,000. Here is what the owner owes per employee under each formula, by how much that employee chooses to save:

The arithmetic is direct. Three percent of $50,000 is $1,500, the ceiling the match reaches for that worker, and it cannot exceed what the employee put in. Two percent of $50,000 is $1,000, paid to each eligible worker regardless of what they defer. The match rewards the employees who save and spares you from funding those who don't; the nonelective is simpler to administer and guarantees each eligible worker gets something. If most of your team contributes, the match usually costs more; if few do, the 2% can.

Who can join, and the October 1 deadline

An employee has to be let in once they have "earned at least $5,000 in compensation during any 2 years before the current calendar year" and are expected to earn $5,000 again this year. You can set an easier bar than that, the IRS allows "less restrictive participation requirements," but you cannot set a harder one.

The timing rule trips up new plans. An employer that has not run a SIMPLE IRA before can start one with an effective date anywhere "from January 1 through October 1 of a year." Miss October 1 and you wait until next year. A business that did not exist until after October 1 gets a pass: it can set the plan up as soon as is administratively feasible. You establish the plan with one of two IRS model forms, Form 5304-SIMPLE or 5305-SIMPLE, the difference being whether each employee picks their own financial institution or you designate one. You keep the signed form; you do not file it with the IRS.

Funding has its own two clocks. Salary-reduction amounts you withhold from paychecks must reach the SIMPLE IRA within 30 days after the end of the month you withheld them. The employer match or nonelective contribution is due later, by the due date of your federal income tax return including extensions, which is the same late-funding latitude that makes these plans forgiving at year-end.

The two-year rule and other costly mistakes

Pulling money out in the first two years. Early withdrawals from most retirement accounts before age 59½ carry a 10% penalty. A SIMPLE IRA adds a trap: "if this withdrawal occurs within the first 2 years of participation, the 10% tax is increased to 25%." The clock starts on your first contribution, not when you opened any IRA. Rolling a SIMPLE IRA into a traditional IRA inside that window triggers the same 25%, so wait out the two years before moving the money.

Running a second plan. The exclusive-plan rule bears repeating because it is easy to break by accident. Add a 401(k) mid-year while a SIMPLE IRA is open and you have two plans, which the rules do not allow. Decide on one before the year starts.

Treating the employer contribution as optional. A SEP lets you skip a lean year. A SIMPLE does not. Once the plan is open, the 3% match or 2% nonelective is owed for that year, so size the commitment to a bad year, not a good one.

Forgetting the owner counts. If you are self-employed with no staff, a SIMPLE IRA still works, and because you have 25 or fewer employees the $18,100 limit applies to you. But a one-person business can usually save more in a Solo 401(k), which stacks a full employee deferral on top of an employer contribution. The SIMPLE earns its keep once you have employees to cover.

How SparkReceipt fits

SparkReceipt does not administer retirement plans or run payroll, and no bookkeeping app should claim to. What it does is keep the number underneath every contribution decision honest: your net profit. The match and nonelective are figured from compensation, and your own deductible contribution as the owner runs off Schedule C profit, so a deduction you forgot to record inflates the figure you are planning against. SparkReceipt captures receipts and sorts them into tax-ready categories, and its income and P&L view gives you a current profit number instead of a December guess, which also keeps your quarterly estimated taxes and self-employment tax planning on the same set of books. See pricing to get started.

SIMPLE IRA FAQ

Can I have a SIMPLE IRA and a 401(k)? Not at the same company in the same year. The IRS rule is that an employer offering a SIMPLE IRA cannot maintain any other retirement plan. If you want both a SIMPLE-style match and a 401(k), you have to pick one for the year.

How much can I put in a SIMPLE IRA for 2026? As an employee you can defer up to $17,000, or $18,100 if the business has 25 or fewer employees, plus a $4,000 catch-up at age 50 and over ($3,850 in the higher-limit plans) and $5,250 at ages 60 to 63. The employer contribution is on top of that.

What if I pay into another employer's 401(k) too? Your deferrals are aggregated across plans. If you contribute to a SIMPLE IRA and another employer's plan in the same year, the IRS caps your total salary-reduction contributions at $24,500 for 2026.

Is the SIMPLE IRA deadline really October 1? For a brand-new plan at an existing business, yes. The effective date has to fall between January 1 and October 1. A business formed after October 1 can set one up as soon as administratively feasible instead.

SIMPLE IRA or SEP IRA for a business with employees? A SIMPLE lets employees contribute and costs you a fixed 3% match or 2% nonelective. A SEP is funded entirely by the employer at the same percentage for each eligible employee, with no employee deferrals. If you want your staff saving their own money, the SIMPLE fits; if you want full control and the option to skip a year, the SEP does.

Key takeaways

• A SIMPLE IRA suits a business with 100 or fewer employees that wants a plan employees pay into, without the cost of running a 401(k).
• For 2026 an employee can defer $17,000, rising to $18,100 at employers with 25 or fewer employees, with age-based catch-ups on top where the plan allows.
• The employer must contribute every year: a dollar-for-dollar match up to 3% of pay, or a flat 2% of pay for each eligible worker.
• A new plan at an existing business has to be set up by October 1, and the employer contribution can be funded as late as the tax-return due date with extensions.
• A withdrawal in the first two years is taxed 25%, not 10%, and the employer cannot run any other retirement plan alongside the SIMPLE.