1978
The year Section 125 went into the tax code. It has outlived every plan design built on top of it.
Revenue Act of 1978
Section 125, explained straight.
A guide to cafeteria plans for the owner who has to sign off. What they are, what they actually save, where they go wrong, and what to look for if you have someone set one up. No forms, no pitch.
Start reading
About a 12-minute read. Updated when the rules change.
In this guide
- What a Section 125 plan actually is
- Where the savings really come from
- Pros and cons, honestly
- What to watch out for
- What to look for if someone implements it
- Questions people actually search
- Plan designs, side by side
- Sources and further reading
Educational only. Not tax or legal advice.
Written for owners of 15 to 500 person companies, and the CPAs and brokers who advise them
7.65%
The employer's FICA share on every dollar of wages. Pre-tax benefit elections come off that base.
IRS Publication 15
One memo
The IRS guidance every wellness-plan pitch has to answer. We explain what it says and what it doesn't.
CCA 202323006, June 2023
What this guide covers
Cafeteria plansPremium-only plansFSAs & HSAsFICA savingsWellness & preventive care plansHiring an administrator
01 · What it is
What a Section 125 plan actually is
A written plan that lets your employees pay for certain benefits before tax instead of after. That's it. The word "cafeteria" just means they choose from a menu. Everything else, the FICA savings, the wellness plans, the vendor pitches, sits on top of that one sentence.
PPremium-only plan (POP)
FHealth FSA
DDependent care FSA
HHSA contributions
The four things a compliant plan has on paper
A written plan document adopted before the plan year starts. A defined plan year. Eligibility rules that don't favor owners and top earners. Election rules, including when someone can change mid-year.
If you can't find all four, you don't have a Section 125 plan yet. You have pre-tax deductions with no paperwork behind them, which is the most common problem we see.
One employee, one year, illustrative
| Pre-tax election (health premium) | $4,800 |
| Employer FICA avoided at 7.65% | $367 |
| Employee FICA avoided at 7.65% | $367 |
| Employee federal income tax avoided at 12% | $576 |
| Combined, one employee | $1,310 |
Illustrative arithmetic on a premium-only plan. Your numbers depend on wages, elections, and state tax. This is the honest version of the math; anything larger describes a different plan design, and you should read that design closely.
02 · The math
Where the savings really come from
When an employee elects a benefit pre-tax, that money leaves the wage base. You stop paying 7.65% on it, and so do they. The savings are real, they are modest per person, and they add up across a company. Anyone quoting you a number several times larger is describing a wellness or indemnity design, which is covered in section 04.
03 · Pros and cons
Pros and cons, honestly
Where a Section 125 plan helps
- Employees keep more of their paycheck on premiums they were paying anyway.
- The employer's payroll tax bill drops by 7.65% of every pre-tax dollar. Real money at 50 or 100 people.
- A premium-only plan is cheap to set up and simple to run. The document is the main cost.
- FSAs and dependent care accounts fit under the same plan once it exists.
- It's a 45-year-old section of the tax code, not a loophole. Done plainly, nobody at the IRS blinks.
Where it costs you
- Owners of more than 2% of an S-corp, partners, and their close family can't participate.
- Elections lock for the plan year. Employees can only change them after a qualifying life event.
- Nondiscrimination testing is real. A plan that favors the highly paid can lose its tax status for them.
- Lower reported wages can trim Social Security credit and some loan or disability calculations for employees.
- The aggressive designs sold on top of it carry the risk. The plan itself doesn't; the add-ons do.
04 · What to watch out for
Wellness plans and the IRS memo, without the spin
A "Section 125 wellness plan" or "preventive care management program" is a specific design: a pre-tax premium for a wellness or indemnity benefit, with cash coming back to the employee. In 2023 the IRS said the cash-back part is taxable wages when it isn't tied to an actual medical expense. That doesn't make every plan illegal. It makes the details the whole game, and it means the burden of proof sits with the plan, not with you. Here are the signs that a pitch hasn't done that work.
Red flag
"IRS-approved"
The IRS doesn't approve plan designs. A vendor who says otherwise is either confused or counting on you being.
Red flag
Savings that dwarf the math above
If the number is several times the 7.65% arithmetic, ask what design produces it and read that design, not the summary.
Red flag
No carrier by legal name
Every indemnity or wellness benefit has an insurer behind it. If you can't get the legal name and a way to verify it, stop.
Red flag
A tax opinion you can't read
Opinions exist to be read by your CPA. "It's proprietary" means it says less than the pitch does.
Red flag
Money that flows back through payroll
Cash returning to the employee with no documented medical service is exactly what the 2023 memo describes as wages.
Red flag
Pressure to enroll this month
Section 125 has been here since 1978. Nothing about it needs a decision before your CPA has looked.
05 · Hiring help
What to look for if someone implements it for you
Most companies don't write their own plan document, and they shouldn't. Here is what a competent administrator or vendor hands you, and what they'll ask you for. Bring this list to the call.
01
A plan document you keep
Adopted before the plan year, in your name, with the plan year and eligibility spelled out. Not a login to a portal that holds it for you.
02
The nondiscrimination test, run and shown
Ask when they run it, what happens if you fail, and who fixes it. A vendor who hasn't heard of it isn't one.
03
Payroll setup in writing
Which deductions are pre-tax, which boxes on the W-2 change, and who tells your payroll provider. Most errors live here.
04
Owner exclusions handled up front
They should ask about your entity type and ownership before quoting savings. If they quote first, the number includes people who can't participate.
05
Named parties for anything beyond a POP
Insurance carrier, claims administrator, and the author of the tax opinion, each by legal name, each verifiable.
06
A CPA-readable summary
Two pages your accountant can sign off on. If the only material is a slide deck, the plan isn't ready to be yours.
07
Fees stated as fees
A flat document fee, a per-employee admin fee, or a percentage. Any of those is fine. "We only get paid from the savings" needs the arithmetic behind it.
08
An exit
What happens at the end of the plan year if you stop. You should be able to keep the document and the deductions without them.
06 · Questions
Straight answers to the questions people actually search
?
Is a Section 125 plan required?
No law requires one. But if you deduct employee premiums pre-tax without a written plan, the IRS can treat those deductions as taxable wages. Most companies that "have one" are really asking whether their paperwork exists.
Read the full answer?
Can an S-corp owner participate?
Not if they own more than 2%. The same rule catches their spouse, parents, and children. Partners in a partnership and LLC members taxed as partners are out too. Owners can sponsor the plan; they just can't join it.
Read the full answer?
Does a cafeteria plan reduce FICA?
Yes, on the dollars employees elect pre-tax. Both the employer and employee shares. The amount is exactly 7.65% of those elections, no more, and the arithmetic above shows what that looks like for one person.
Read the full answer07 · Side by side
The plan designs and the programs sold on them
Each comparison lists what the plan is, who is behind it, what the tax opinion says, and what it costs. Facts only, updated when something changes. We name names, including the company that supports this site.
Plan design
Premium-only plan vs. wellness plan
The conservative design and the aggressive one, what each saves, and where the risk actually sits.
Read the comparison → ProgramsSIMERP and the programs like it
What SIMERP is, what its critics and the IRS have said, and how the other programs in the category differ.
Read the comparison → AdministratorsDocument-only vs. full administration
A $150 plan document, a payroll provider add-on, or a full administrator. Who each one is right for.
Read the comparison →08 · Sources
Sources and further reading
Everything above traces to one of these. We link the primary source, not a summary of it.
- 26 U.S. Code § 125, the statute itself.
- IRS Publication 15-B, Employer's Tax Guide to Fringe Benefits.
- IRS Publication 15, the FICA rate tables.
- Chief Counsel Advice 202323006, June 2023, on wellness indemnity payments.
- Proposed Treas. Reg. § 1.125-1 through -7, the cafeteria plan regulations.
- IRS Notice 2013-71, health FSA carryover rules.
About this site
Who writes this, and why
Section 125 Answers is an educational site. It exists because most of what ranks for these questions is either a payroll vendor's blog or a law firm's warning, and neither is written for the owner who has to decide.
Disclosure
This site is supported by Kept Benefits Group, a company that sells Section 125 plan administration. That relationship is stated on every page. Kept doesn't edit the guidance, the pros and cons, or the red flags above, and the comparisons include Kept on the same terms as everyone else.
Nothing here is tax, legal, or benefits advice. Bring anything you plan to rely on to your CPA.