When a SEP IRA is the plan you should outgrow

A SEP IRA is a respectable plan. It is also the plan many owners keep for a decade after it has stopped matching the problem. The problem, when it changes, is usually one of three things. The dollar ceiling is too low for the income. The same percentage you give yourself is an expensive way to give every eligible employee a benefit, with no age weighting. Or you have started hearing that a cash balance plan can sit on top of the SEP and double the deduction, which is the sentence that needs to be retired before it becomes a contribution. Outgrowing a SEP is a document and testing project. It is not a second account you open in August and fund in December.

Sterling Pension Group LLC in West Hartford is a third-party administrator of qualified plans. We are not an actuarial firm. Independent Enrolled Actuaries certify defined benefit valuations. We do not administer your SEP IRA as if it were a trust we custody. This briefing is not tax, legal, or actuarial advice. Your CPA has to bless the year the SEP stops and the year anything else starts.

What a SEP actually allows in 2026

A SEP is an employer contribution to an individual retirement account, under a written arrangement, at a uniform percentage of compensation for eligible employees. The contribution is a percent of pay. The percent is generally limited to 25 percent of compensation for a common-law employee. For a self-employed owner the arithmetic is circular, because the deduction reduces the earned income the percentage applies to, and the familiar result of that circularity is a contribution closer to 20 percent of net earnings before the deduction. Publication 560 is the IRS booklet that walks through that computation. Do not apply 25 percent to a Schedule C net profit and call it done.

There is a dollar ceiling. It is the defined contribution annual-additions limit. For 2026 that limit is $72,000. It is not a SEP-only number, and it is not a promise that $72,000 is available. A contribution of 25 percent of pay reaches $72,000 only when considered compensation is high enough. Twenty-five percent of the compensation cap is more than $72,000, so the dollar ceiling binds before the percentage, applied to the cap, would. The compensation a SEP may count is capped at $360,000. An owner paid less than the wage that supports a $72,000 contribution does not get $72,000 by enthusiasm. The owner gets the percentage times the pay the SEP is allowed to see.

Those figures were announced in IR-2025-111 on November 13, 2025, in Notice 2025-67, and they sit on the IRS cost-of-living page. In 2025 the additions limit was $70,000 and the compensation cap was $350,000. If your standing instruction to the brokerage is "max the SEP," confirm the instruction was updated. Max means the lesser of the percentage-of-pay result and $72,000, on a census of eligible employees, not a round number from a 2024 email.

The elective deferral limit of $24,500, the catch-up of $8,000, and the catch-up of $11,250 at ages 60 through 63 are 401(k) figures. A SEP IRA does not accept employee deferrals. If someone is describing a "SEP 401(k)," they may mean a 401(k) plan, or they may mean a plan that should be read twice. The IRA limit of $7,500, plus a $1,100 catch-up, is a personal IRA limit. It is not extra SEP room.

SEP contributions are immediately vested. They go to IRAs. Those IRA balances are pre-tax money in the traditional IRA bucket, which is why a backdoor Roth conversion becomes taxable under the pro-rata rule for as long as the SEP IRA holds a balance. The briefing on why a backdoor Roth is not a pension is the companion piece. Leaving the SEP, if you do it, has a distribution question attached. Do not convert or roll the account in the same week you decide you have outgrown the contribution formula.

Why the percentage becomes the reason to leave

Because the percentage is uniform, a SEP is simple and sometimes blunt. If you contribute 20 percent for yourself, you contribute 20 percent for every eligible employee, on their considered pay, subject to the same dollar ceiling. There is no age weighting. A 62-year-old owner and a 28-year-old employee are in the same percentage. For a solo consultant that bluntness is a virtue. There is no staff line. The only question is whether $72,000, or less if earnings are lower, is enough of a deduction and enough of a savings rate. Often it is. The self-employed path is not automatically a pension. For a one-person firm with moderate, uneven income, the SEP may still be the right entire plan.

For a firm with employees, the same bluntness is why owners outgrow it. The staff cost is the same percentage you wanted for yourself. A cash balance plan, because it is a defined benefit plan tested on benefits, can produce a larger share of the value for an older owner and a smaller, still real, benefit for younger staff. That sentence is the design advantage. It is not a promise that staff cost goes to zero. It is not a way to exclude people the SEP had to cover if those people meet the new plan's eligibility. The comparison of SEP, 401(k), and pension designs is the fair chart. The staff cost page is the number that has to sit next to the owner's illustrative credit before anyone calls the move an upgrade.

You have also outgrown a SEP, even with no employees, when the $72,000 ceiling is the constraint and the practice can fund a benefit for several years. The defined benefit limit is an annual benefit of $290,000, described on the IRS benefit limits page. The contribution required to fund a benefit of that shape is actuarial. It can be illustratively much larger than $72,000 for an older owner with high considered pay, and it can be no larger than the SEP for a younger owner or a thin wage. There is no flat IRS cash-balance contribution cap waiting as the "next SEP limit." If an illustration does not say illustrative on its face, it is not ready to replace the SEP instruction at the brokerage.

Why you should not stack them on a slogan

Coordination is required. It is required even when both arrangements are lawful on their own.

First, read the SEP document. The IRS model on Form 5305-SEP generally cannot be used if the employer maintains another qualified plan. Many prototype SEPs have the same restriction, or a restriction tied to which employees are covered. Some SEP documents are more flexible and still have to be coordinated with the deduction rules. Do not assume a SEP and a cash balance plan can run in the same year because both accept employer money. The sequence for many owners is to stop the SEP on the document's terms and then adopt the qualified plan. Stopping means amending or terminating the SEP arrangement going forward. It does not mean withdrawing the IRA balance. It does not mean forgetting to tell the brokerage, which will happily accept a contribution the document no longer allows.

Second, the deduction rules coordinate employer contributions to a defined benefit plan and a defined contribution plan. Elective deferrals are generally handled separately from the employer-deduction percentage. Employer profit sharing and SEP contributions are not a free addition on top of a maximum pension deduction. There is a combined limit, with an exception that often lets a modest defined contribution employer contribution, commonly discussed at 6 percent of compensation, sit beside the pension deduction. Six percent of $360,000 is $21,600. That exception is not a SEP maximized at $72,000 plus a full cash balance credit. An owner who funds a full SEP and then funds a cash balance deposit as if the SEP were invisible can create a deduction problem even when each plan, viewed alone, looked fine. Your CPA applies section 404. The actuary applies the funding rules. Neither one is honored by a slogan that says the plans "stack."

Third, testing and coverage apply to the qualified plan on its own census. A SEP that covered a broad group of employees does not give the new cash balance plan permission to cover a narrower group. If anything, the employees who have learned to expect a contribution will notice the change, and the law may require that they be included. Minimum participation rules apply to the defined benefit plan. A SEP has no Schedule SB. A cash balance plan does. The combo structure people actually use is a 401(k) plus a cash balance plan, designed together, not a leftover SEP plus a pension.

Fourth, the IRA that already holds the SEP money remains an IRA. It continues to affect any backdoor Roth. Rolling it into a qualified plan, if the plan accepts rollovers and the timing is right, is a separate project from adopting the pension. Doing it badly, in the same tax year as a conversion, is a CPA problem with a real tax cost. Leave that sequencing to the CPA. Do not use the pension trust as a dumping ground for a SEP IRA contribution that has not been deposited. They are different legal objects.

Who should stay, and who should start the exit

Stay if the percentage is affordable, the $72,000 ceiling is enough, employees are either absent or already priced in, and you do not want a multi-year funding promise. A SEP does not require an enrolled actuary. A cash balance plan does. Administration, a trust, a Form 5500, and a minimum contribution are the cost of the larger ceiling. Owners who want the ceiling only for a single windfall year should read the permanency caution before they switch. A qualified plan is supposed to be a continuing program. Abandoning it immediately because the SEP was more convenient is a facts-and-circumstances problem, not a clever one-year trade.

Start the exit if the wage supports a larger benefit, the owner is old enough that the illustrative deposit is meaningfully above the SEP ceiling, the staff cost has been quoted in dollars, and the firm can fund the promise for several years. Also start it if the SEP document itself is the obstacle to a 401(k) you now need, because deferrals of $24,500 require a plan that can take them. A SEP cannot be patched into a 401(k) by a payroll election.

Roth catch-up does not apply inside a SEP, because a SEP has no catch-up deferral. It will apply inside a 401(k) you adopt, operationally in 2026, when prior-year FICA wages exceeded $150,000. It still will not apply to cash balance pay credits. Ask the future recordkeeper. Final regulations are stricter in 2027. Good-faith compliance is the current standard. PBGC coverage, if you move to a defined benefit plan, is plan-specific. Many small professional-service plans are exempt. Not all. The SEP's simplicity is not an exemption you bring with you. The PBGC coverage page is the reference once a pension exists.

The limits page keeps $72,000 in the annual-additions lane and $290,000 in the benefit lane. That separation is the entire reason a SEP and a pension are not two sizes of the same product.

What to do in the next two weeks

Find the SEP document, not just the brokerage statement. Read whether it forbids another qualified plan. Write down the 2026 contribution you have already made and the contribution you still intended to make.

Ask the CPA what a full stop to 2026 SEP contributions would change, and whether any amount already funded has to stay. Ask the administrator, only after that, for an illustrative cash balance range that assumes the SEP employer contribution is zero, and a second range only if the CPA says a small coordinated defined contribution piece is still deductible. Label both illustrative. Do not ask for a picture in which a $72,000 SEP and a maximum pension coexist by assumption.

Then bring the document and the census. Outgrowing a SEP is ordinary. Stacking one on a slogan is how a clean IRA arrangement becomes a deduction you have to undo.