Reviewed by a licensed benefits professional. Last reviewed: September 24, 2026.
Section 125 tax savings for mid-size employers come from one rule: money employees put into a Section 125 cafeteria plan is not wages for FICA. For a company with 50 to 500 employees, that usually means tens of thousands of dollars a year in employer payroll tax that stops going to the IRS.
I have run this math for a lot of owners and CFOs. The number almost always surprises them, and the traps almost always come from the same three places: high earners over the Social Security wage base, low participation, and nondiscrimination testing. This guide covers all of it with real 2026 numbers.
Key facts (2026):
- Employer FICA is 7.65%: 6.2% Social Security plus 1.45% Medicare (IRS Publication 15, 2026).
- Social Security tax stops at $184,500 of wages per employee in 2026 (Social Security Administration, October 2025).
- Qualified cafeteria plan benefits are exempt from income tax withholding, Social Security, Medicare and FUTA (IRS Publication 15-B, 2026).
- The 2026 health FSA salary reduction limit is $3,400, with a $680 carryover (IRS Revenue Procedure 2025-32).
- An employer with 50 or more full-time or full-time-equivalent employees is an applicable large employer under the ACA (IRS, 2026).
What Are Section 125 Tax Savings for Mid-Size Employers?
Section 125 tax savings are the payroll taxes a 50 to 500 employee company stops paying when employees move benefit costs into a cafeteria plan. The employer saves 7.65% FICA on every pre-tax dollar. Employees save FICA plus federal income tax, and in most states, state income tax.
A Section 125 cafeteria plan is a written employer plan, allowed by Internal Revenue Code Section 125, that lets employees pay for qualified benefits with pre-tax pay. FICA means the Social Security and Medicare payroll taxes that both the employer and the employee pay. When an employee elects $500 a month for health premiums through the plan, that $500 leaves the FICA wage base for both sides.
In this guide, "mid-size" means about 50 to 500 employees. That range matters for two reasons. The savings are large enough to show up on the Form 941 every quarter, and the company is big enough that the ACA employer mandate and nondiscrimination testing both apply. For the full rulebook, see the Section 125 cafeteria plan guide.
| Tax | Employer saves on pre-tax dollars? | Employee saves on pre-tax dollars? | 2026 rate or rule |
|---|---|---|---|
| Social Security | Yes, up to the wage base | Yes, up to the wage base | 6.2% each, first $184,500 (SSA) |
| Medicare | Yes | Yes | 1.45% each, no wage cap (IRS Pub. 15) |
| FUTA | Yes, on the first $7,000 of wages | No employee FUTA | Excluded for qualified benefits (IRS Pub. 15-B) |
| Federal income tax | No employer income tax on wages | Yes | Employee's bracket, often 12% or 22% |
| State income tax | No | Yes, in most states | Varies by state |
How Much Can Companies Save With Section 125 Plans?
Companies save 7.65% of every dollar employees elect pre-tax through a Section 125 plan, according to the FICA rates in IRS Publication 15 (2026). A mid-size employer with 70 to 175 employees paying $500 a month in premiums pre-tax keeps about $32,000 to $80,000 a year.
Here is the same premium-only math at three sizes. Each example assumes 70% of employees enroll and the average employee premium share is $500 a month, which is close to what many mid-size plans charge for employee-plus-family tiers.
| Employees | Enrolled (70%) | Pre-tax dollars per year | Employer FICA saved per year (7.65%) |
|---|---|---|---|
| 50 | 35 | $210,000 | $16,065 |
| 100 | 70 | $420,000 | $32,130 |
| 250 | 175 | $1,050,000 | $80,325 |
| 500 | 350 | $2,100,000 | $160,650 |
These figures come straight from the 7.65% employer FICA rate. They do not include the employee side, which is often bigger. An employee in the 12% federal bracket who pays $500 a month pre-tax saves $38.25 in FICA plus $60 in federal income tax, about $98.25 a month or $1,179 a year.
Adding a health FSA raises both numbers. If 40 of the 250 employees in the example also put $1,500 a year into a health FSA, that adds $60,000 of pre-tax dollars and another $4,590 of employer FICA savings. The deeper savings math is in our guide to maximizing FICA tax savings.
How to Calculate Section 125 Savings
To calculate Section 125 savings, multiply total annual pre-tax elections by 7.65% for the employer, then adjust for employees above the Social Security wage base. The employee's savings are the same dollars times 7.65% FICA plus their federal and state income tax rates.
Use these five steps with your own census:
- List every enrolled employee's monthly pre-tax election. Include health, dental and vision premium shares, health FSA and dependent care FSA amounts.
- Multiply by 12 to get annual pre-tax dollars per employee.
- Split high earners. For any employee whose wages exceed $184,500 in 2026, the dollars above the wage base save only 1.45% Medicare, not 7.65%, per the Social Security Administration's 2026 wage base.
- Multiply the regular dollars by 7.65% and the over-the-base dollars by 1.45%. The total is the employer's annual FICA savings.
- Subtract plan costs, such as administration fees, to get the net.
Worked example: a 100-employee manufacturer
Take a 100-employee company where 70 employees enroll. Sixty-six earn under $184,500 and elect $500 a month. Four managers earn over $184,500 and also elect $500 a month.
| Line | Math | Result |
|---|---|---|
| Regular earners, annual pre-tax dollars | 66 x $500 x 12 | $396,000 |
| Employer FICA saved on regular earners | $396,000 x 7.65% | $30,294 |
| High earners, annual pre-tax dollars | 4 x $500 x 12 | $24,000 |
| Employer Medicare saved on high earners | $24,000 x 1.45% | $348 |
| Total employer savings | $30,294 + $348 | $30,642 |
The four high earners cost the employer $1,488 in lost savings compared with a flat 7.65% assumption ($24,000 x 6.2%). That is why a careful projection always splits the census by wage.
If you do not want to build the spreadsheet, the Summit savings calculator runs the same math from headcount and average premium.
What Reduces Section 125 Savings at a Mid-Size Company?
Three things cut Section 125 savings at mid-size companies: low enrollment, employees above the Social Security wage base, and a failed nondiscrimination test that turns key employees' benefits taxable. Each one is fixable with plan design and a clean census.
Low participation. Savings scale with enrolled dollars, not headcount. A 250-person company where only 40% enroll saves about $45,900 on the same $500 average, not $80,325. Clear enrollment communication is often the cheapest way to raise savings.
High earners. As shown above, dollars above $184,500 save only 1.45% Medicare in 2026. Companies with many highly paid staff should model them separately.
Nondiscrimination testing. Internal Revenue Code Section 125(b) says highly compensated employees and key employees lose the tax break if the plan favors them. One test caps key employees at 25% of the plan's total nontaxable benefits. At 50 or more employees, owners and officers are a smaller share of the plan, so mid-size employers usually pass more easily than very small firms, but only if the test is actually run. Our guide to Section 125 nondiscrimination testing walks through each test.
| Savings leak | What happens | Typical fix |
|---|---|---|
| 40% enrollment instead of 70% | Savings fall by about 43% | Default enrollment with a clear opt-out notice |
| High earners over $184,500 | Only 1.45% saved above the base | Model them separately |
| Failed key employee test | Key employees' benefits become taxable | Annual testing before year end |
| No written plan document | All deductions become taxable wages | Adopt the plan before the plan year starts |
Does the ACA Change Section 125 Savings for Employers With 50 or More Employees?
The ACA does not reduce Section 125 savings, but employers with 50 or more full-time employees must also meet ACA affordability rules, per 2026 IRS guidance. A Section 125 plan helps employees pay their share pre-tax. It does not change how affordability is measured.
For 2026, employer coverage is affordable if the employee's required contribution for the lowest-cost self-only plan is no more than 9.96% of household income, according to IRS guidance. If an applicable large employer fails to offer coverage to at least 95% of full-time employees, the 2026 Section 4980H(a) penalty is $3,340 per full-time employee after the first 30, per IRS figures.
A Section 125 plan is how most mid-size employers let employees pay that required contribution with pre-tax dollars. For the affordability numbers, see our ACA affordability percentage guide.
Who Handles Section 125 Setup and Administration?
A third-party administrator, a payroll company or a benefits firm usually handles Section 125 setup, including the plan document, employee elections and annual testing. Summit Health Benefits administers Section 125 plans for employers for $35 per enrolled employee per month (PEPM).
PEPM means the fee is charged only for employees who enroll. The $35 PEPM fee is paid out of the employer FICA savings the plan creates, not out of operating cash. Summit Health Benefits' plan design typically produces employer FICA recapture of $91 to $136 per enrolled employee per month, so the employer still nets about $56 to $101 per enrolled employee per month after the fee. Employees usually see take-home pay rise by $70 to $110 a month.
Summit Health Benefits provides the written plan document, a summary plan description, nondiscrimination testing support, and plan documents reviewed by ERISA attorneys. The full fee breakdown is in our Section 125 plan cost guide.
| Summit Health Benefits figure | Per enrolled employee per month |
|---|---|
| Typical employer FICA recapture | $91 to $136 |
| Summit admin fee (paid from those savings) | $35 |
| Net employer benefit | $56 to $101 |
| Employee take-home increase | $70 to $110 |
The Summit Cafeteria Plan
A Section 125 plan with the plan document, summary plan description and nondiscrimination testing support built in. Compare Summit plans or build your plan.
What Should Mid-Size Employers Do Next?
Mid-size employers should pull a census, model savings by wage band, and adopt a written plan before the next plan year starts. Most plans run on a calendar year, so the plan document needs to be signed by January 1 for 2027 deductions.
A simple 30-day path looks like this:
- Week 1: Export a census with wages and current premium shares.
- Week 2: Run the savings projection and pick the benefits to include.
- Week 3: Sign the plan document and set up payroll deduction codes.
- Week 4: Hold enrollment and collect signed elections.
Free copy-paste template: census request email to your payroll team
Subject: Census export for Section 125 savings projection
>
Hi team, please export a census of all active employees with: employee ID, annual wages year to date, pay frequency, current monthly health, dental and vision premium share, and any FSA elections. Please remove Social Security numbers and home addresses. We need it by Friday to model a Section 125 savings projection for the next plan year. Thank you.
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Frequently Asked Questions
How much can companies save with Section 125 plans?
How do you calculate Section 125 savings?
What are the employer tax savings from Section 125?
Is there a Section 125 savings calculator?
Do Section 125 tax savings apply to mid-size employers?
Does a Section 125 plan lower Social Security benefits for employees?
Sources
IRS Publication 15 (2026), Employer's Tax Guide; IRS Publication 15-B (2026), Employer's Tax Guide to Fringe Benefits; Social Security Administration, 2026 contribution and benefit base announcement (October 2025); IRS Revenue Procedure 2025-32 (2026 health FSA limits); Internal Revenue Code Sections 125(b) and 4980H; IRS guidance on applicable large employers and 2026 affordability percentage and employer shared responsibility payment amounts (2026).