Premium Only Plans: When Simple Is Enough and When It Leaves Money Behind

Plain English Benefits · Updated October 10, 2026 · Education, not tax advice

Short Answer

Premium only plans are sufficient when your employees' primary benefit expense is health insurance premiums and you want the simplest possible Section 125 setup. They handle one thing well: making insurance premiums pre-tax. Adding medical FSA or dependent care FSA election options to the plan makes sense when employees have predictable out-of-pocket medical expenses or daycare costs that a premium-only structure ignores entirely. The question is not which plan is better. The question is whether the expenses your team actually faces are served by premiums alone or whether FSA elections would capture meaningful tax savings a POP leaves on the table.

What a Premium Only Plan Actually Covers

A premium only plan, often called a POP, is the simplest form of Section 125 cafeteria plan. It allows employees to pay their share of employer-sponsored health, dental, and vision insurance premiums with pre-tax dollars. That is the entire scope. The employer withholds the premium amount from paychecks before calculating taxes, the employee's taxable income drops, and the premium gets paid.

We covered the mechanics in detail in our post on what a premium only plan is /learn/premium-only-plan. The plan requires a written document, annual enrollment, and nondiscrimination testing, but the day-to-day administration is minimal because the only elections are the insurance elections employees already make during open enrollment.

What It Does Not Cover

A premium-only plan does not reimburse medical expenses. It does not cover dependent care. It does not allow employees to set aside money for co-pays, prescriptions, eyeglasses, or daycare. Those benefits require a full cafeteria plan with FSA options.

The name tells you the boundary: premium only means premium only. If an employee enrolls in the company health plan and pays $200 per month toward the premium, the POP handles that $200. If the same employee later pays $150 out of pocket for a dental filling, the POP does nothing. The $150 comes out of after-tax dollars unless the plan includes a medical FSA election.

This is not a flaw. It is the design. Premium only plans exist for employers who want the tax benefit on insurance premiums without the administrative lift of FSA claims processing.

When Premium Only Is Enough

A POP is sufficient when the primary benefit employees use is employer-sponsored insurance and out-of-pocket medical or dependent care expenses are either low or unpredictable. Smaller employers with younger workforces, teams with generous insurance coverage that minimizes out-of-pocket costs, or businesses where most employees do not have dependent care expenses may find that adding FSA options introduces administrative complexity with little uptake.

If most employees enroll in the company health plan, pay a portion of the premium, and rarely ask about reimbursing other expenses, the premium-only structure captures the bulk of the available tax savings without requiring anyone to estimate annual medical or daycare costs. The plan does its job, stays compliant, and requires minimal ongoing attention.

Some employers run a POP for years and never hear a request for FSA elections. That is a signal the plan fits.

When Adding FSA Options Captures Savings a POP Leaves Behind

Premium only plans leave money on the table when employees have predictable, recurring out-of-pocket expenses that could be paid pre-tax. The two most common scenarios are medical expenses and dependent care.

Medical FSA Elections

Employees with chronic conditions, families with young children, or anyone anticipating a known procedure during the year may benefit from a medical FSA. Prescription co-pays, dental work, orthodontics, and eyeglasses all qualify. If an employee knows they will spend $1,500 on these expenses during the year, electing a medical FSA allows them to pay with pre-tax dollars instead of after-tax income. The tax savings can be substantial, depending on the employee's tax bracket.

A premium-only plan offers nothing here. The employee pays the $1,500 out of pocket with money that has already been taxed. Adding a medical FSA option to the cafeteria plan captures that opportunity.

The tradeoff is the use-it-or-lose-it rule. Medical FSA contributions must be elected in advance, and unspent balances are typically forfeited at the end of the plan year unless the plan offers a grace period or a small carryover. Employees who overestimate their expenses lose money. Employees who underestimate miss savings. The accuracy of the election determines whether the FSA is worth the effort.

We covered the breakeven math in our post on whether an FSA is worth it /learn/is-fsa-worth-it.

Dependent Care FSA Elections

Employees paying for daycare, preschool, or after-school care for children under 13 may benefit from a dependent care FSA. The 2026 contribution limit is $5,000 per household, or $2,500 if married filing separately. For families with consistent monthly daycare expenses, the dependent care FSA can produce meaningful tax savings.

A premium-only plan does not touch dependent care expenses. Those costs come out of after-tax dollars. Adding a dependent care FSA option to the cafeteria plan makes those expenses eligible for pre-tax treatment.

The same use-it-or-lose-it rule applies. Employees must estimate their annual dependent care costs during open enrollment, and changing the election mid-year is allowed only for specific qualifying events. If summer camp costs less than expected or a child ages out of care mid-year, the employee may forfeit the unused balance.

We wrote a full breakdown of dependent care FSAs /learn/dependent-care-fsa and covered the specific rules around mid-year changes /learn/can-i-change-my-dependent-care-fsa-contribution-mid-year.

The Decision Framework for Employers

The choice between a premium-only plan and a full cafeteria plan with FSA options comes down to employee need and administrative capacity.

Ask whether your employees are asking for FSA options. If no one has mentioned reimbursing medical expenses or dependent care, adding those elections may result in zero participation. Survey the team or review the questions that come up during open enrollment. The demand signal is usually clear.

Consider whether the administrative lift is manageable. Medical and dependent care FSAs require claims processing, documentation review, and ongoing communication with employees about eligible expenses and deadlines. Some employers handle this internally. Others use a third-party administrator. Either way, the workload is higher than a premium-only plan.

Evaluate the tax savings opportunity. If a meaningful portion of your workforce has predictable out-of-pocket medical or dependent care expenses, the tax benefit from FSA elections can be significant for employees. That benefit may justify the added complexity.

There is no universal answer. A 10-person team with low turnover and minimal out-of-pocket expenses may run a POP indefinitely. A 50-person employer with several employees paying for daycare may find that adding a dependent care FSA option delivers value that a premium-only structure misses.

Expanding a POP Later

A premium-only plan is not a permanent decision. Employers who start with a POP can amend the plan document later to add medical FSA or dependent care FSA elections. The amendment requires updating the written plan, communicating the change to employees, and adjusting the enrollment and claims administration process.

Some employers start with a POP to keep the first year simple and add FSA options once the baseline compliance and enrollment rhythm is established. That approach works. The IRS does not penalize employers for starting narrow and expanding later.

The reverse also works. Employers who offered FSA elections and saw no participation can simplify back to a premium-only structure, though removing an election option mid-stream is less common in practice.

FAQ

Can I have a premium only plan and still offer FSA options later?

Yes. A premium-only plan is not a lifetime commitment. Employers can amend the plan document to add medical FSA or dependent care FSA elections when employee needs change or when the administrative capacity exists to manage claims processing. The amendment must be in writing, and employees must be notified before the next open enrollment period.

Is a premium only plan cheaper to administer than a full cafeteria plan?

Typically, yes. Premium only plans involve fewer moving parts because there are no FSA claims to process, no reimbursement requests to review, and no use-it-or-lose-it deadlines to track. The plan still requires a written document, annual enrollment, and nondiscrimination testing, but the day-to-day workload is lighter than a plan with FSA elections.

What happens if an employee has out-of-pocket medical expenses under a premium only plan?

The employee pays those expenses with after-tax dollars. A premium-only plan does not reimburse medical expenses outside of insurance premiums. If the employee wants to pay co-pays, prescriptions, or other qualified medical expenses with pre-tax dollars, the employer must amend the plan to add a medical FSA election option.

Do employees lose any tax benefit by using a premium only plan instead of a full cafeteria plan?

Employees receive the tax benefit on insurance premiums under both plan types. The tax benefit they do not receive under a premium-only plan is the pre-tax treatment of out-of-pocket medical expenses or dependent care costs, because those elections are not available in a POP. Whether that represents a meaningful loss depends on the employee's actual expenses.

Running the Plan, Not Just Using It?

If you are deciding between a premium-only plan and a full cafeteria plan with FSA options, the setup guide at /services/section-125-setup walks through the plan document requirements, payroll integration, and the compliance steps that apply to both structures. Start there before committing to either approach.