PBGC coverage is a coverage question, not a vibe.

Owners describe PBGC coverage in the language of size. We are small. We are a professional practice. We are basically just the partners. Those sentences are sometimes the right outcome and they are never the analysis. The Pension Benefit Guaranty Corporation insures most private defined benefit plans, including cash balance plans. It does not insure them because they feel like pensions, and it does not skip them because they feel like family businesses. Coverage is a statutory status. Two exemptions matter to the firms we see, and both have conditions that a headcount or a professional license does not satisfy by itself.

Sterling Pension Group is a third-party administrator in West Hartford. We will ask the coverage question before a defined benefit plan is adopted and again when the census changes. We are not an actuarial firm, and we are not the PBGC. A close case is a coverage determination, not a confident email. This briefing is not tax, legal, or actuarial advice. It is a warning against deciding you are exempt because the plan is small.

What coverage is

Title IV of ERISA is the insurance program. If a covered plan terminates without enough assets to pay guaranteed benefits, the PBGC becomes the backstop, within limits, and the sponsor has premium and reporting obligations while the plan is ongoing. Premiums are not large in a tiny plan relative to a six-figure contribution, and they are not optional in a covered plan. A plan that is not covered does not pay them and does not get the insurance. Being uncovered is not a prize and not a stigma. It is a status. You want it to be the correct one.

A 401(k) or other defined contribution plan is not a PBGC plan. Adding a cash balance plan beside a 401(k) is what creates the question. The defined benefit plan is the covered species, if it is covered at all. The profit-sharing plan is not. People who say "our retirement plan" as if it were one thing will mis-answer a premium question. Split the sentence.

The PBGC's own page on coverage is the right primary source. Read it when a proposal tells you the plan is exempt. If the proposal cannot point to the exemption it is relying on, it is describing a vibe.

Substantial owners

A plan established and maintained exclusively for substantial owners is exempt from PBGC coverage. A substantial owner, in general, is a sole proprietor who owns the entire unincorporated business, a partner who owns more than 10 percent of the capital or profits interest, or a shareholder who owns more than 10 percent of the voting power or of the value of the stock. The lookback reaches ownership during the prior sixty months. The exemption applies when every participant is a substantial owner. It fails when any participant is not.

That last sentence is the one households miss. A spouse on payroll who participates, and who is not a substantial owner under the statutory definition, can take the plan out of this exemption even when the plan still feels like a family plan. Attribution and community property can cut in the other direction and make a spouse a substantial owner. Do not guess from the marriage. Write down who owns what, and ask. An associate, a nurse, an office manager, or a child who is a participant and who does not meet the ownership test will also end the exemption. "Exclusively" is the word. One non-owner participant is enough.

Owner-only plans often fit this exemption, which is why many one-participant cash balance plans do not pay PBGC premiums. The fit is re-examined when you hire. The first common-law employee who enters the plan is not a small change in administration. It can be a change in insurance status. Eligibility cliffs are how this arrives by surprise: a hire who was ignored because the person had not yet completed a year of service becomes a participant on the day the document says so, and the exemption conversation should have happened before that day.

Professional service employers, and the 25-participant line

A plan established and maintained by a professional service employer is exempt if it has not, at any time after September 2, 1974, had more than 25 active participants. Both parts are required. The employer has to be a professional service employer, and the headcount condition has to have been true for the entire history of the plan since ERISA, not merely this year.

A professional service employer is an organization owned or controlled by professional individuals whose principal business is the performance of professional services. The statute lists physicians, dentists, chiropractors, osteopaths, optometrists, other licensed practitioners of the healing arts, attorneys, public accountants, public engineers, architects, draftsmen, actuaries, psychologists, social or physical scientists, and performing artists. The list is not always treated as exhaustive. The PBGC has said it will look at the services and the expertise when a profession is not named. Consultants, investment advisers, and designers should not assume they are inside the list because the work feels professional. Principal business matters as much as the owner's degree. The PBGC's own example is an attorney who owns a company whose principal business is selling insurance. The owner is a lawyer. The company's plan is not a professional service plan, because the business is not the practice of law.

This is why we will not say that all professional practices under 25 participants are exempt. Many are. A physician whose practice is the practice of medicine, owned by physicians, with a plan that has never had more than 25 active participants, is in the fact pattern the exemption describes. A dentist in the same posture is as well. A law firm that is actually a law practice, not a title company or a staffing firm with lawyers at the top, may be as well. A consultant may not be a "professional individual" for this purpose at all. A practice that once covered 26 active participants, even if it now covers 8, has a historical problem the current headcount does not cure. "Active participants" is a plan term, not a count of full-time equivalents you consider core staff. A participant who is active under the document counts.

Crossing 25 is a one-way event for this exemption. The statute's condition is that the plan not have had more than 25 active participants at any time after September 2, 1974. Growing past the line and then shrinking does not restore the exemption. Firms that are at 20 and hiring should have the conversation before the offer letters, not after the twenty-sixth person enters the plan. Part-time patterns and eligibility waiting periods affect when a human being becomes an active participant. They do not raise the number 25.

What does not decide coverage

The size of the contribution does not decide it. A very large deduction in an owner-only plan can still sit in an exempt plan. A modest benefit in a plan with non-owner participants can sit in a covered plan.

The state of incorporation does not decide it. A Connecticut professional corporation is not exempt because it is a professional corporation. The federal definition looks at who owns it and what business it actually conducts.

The fact that you have never paid a premium does not decide it. Nonpayment is equally consistent with a valid exemption and with a plan that should have been paying. The Form 5500 asks coverage-related questions and is not a determination letter from the PBGC. The Department of Labor's Form 5500 guidance explains the return. It does not insure the benefits.

A prototype document's silence does not decide it. Documents often say the plan is intended to be exempt or intended to be covered. Intention is not the statute. If the census changes, the intention in last year's adoption agreement is stale.

Being under the 2025 benefit limits does not decide it either. The defined benefit dollar limit is an annual benefit of $280,000. Compensation is capped at $350,000. Those figures, from IR-2024-285 and the IRS benefit limits page, constrain the benefit. They say nothing about insurance. A plan well under both limits can be covered. A plan using the full limits can be exempt.

Premiums, filings, and close calls

If the plan is covered, premiums are due, and there is a premium filing even in a year when you would rather think about the contribution. Late premiums have their own penalties. The due date is not September 15 and not July 31. Do not store the premium in the same mental folder as minimum funding or the Form 5500 and assume one wire satisfies three agencies. The deadline calendar is where separate dates stay separate.

If the plan might be covered, ask for a coverage determination rather than building a year of administration on a guess. The determination is a PBGC process. It is slower than a planning meeting and faster than a premium dispute after a termination. Close calls we see in practice are the consultant whose work is advisory but not on the statutory list, the professional firm that also runs a nonprofessional business in the same entity, the plan that added a non-owner spouse, and the firm that is proud of having "gotten small again" after a period above 25 active participants.

If the plan is plainly exempt, keep the file that shows why. Ownership percentages, a description of the principal business, and a participant count that has never gone over 25 are the file. When you hire, reopen it. When you add a second entity, reopen it. An exemption is a fact pattern you have to keep, not a sticker applied at adoption.

Publication 560 tells small employers that defined benefit plans exist and that PBGC premiums may apply. It is a prompt to ask. It is not the determination. We coordinate the question with the independent Enrolled Actuary and, when the case is close, with counsel. We do not sell the exemption as a feature. A covered plan can still be the right plan. An exempt plan can still be the right plan. A mislabeled plan is the expensive one.

What to do in the next two weeks

Write the exemption you think you are using, in one sentence: exclusively substantial owners, or professional service employer that has never exceeded 25 active participants. If you cannot write the sentence, you do not yet know your status.

Under the sentence, list every participant since the plan began, not only the current owners. Note the highest number of active participants the plan has ever had. Note every business the sponsor has conducted, not only the profession on the letterhead. Note any spouse or child who is a participant and the ownership percentage that person actually has.

If any line of that list surprises you, stop treating exemption as settled. Bring the list before you rely on it in a proposal, a premium holiday, or a termination quote. We will tell you whether the case looks plain or whether it needs a determination. We will not tell you that a small practice is exempt because it is small.