Section 125 Plans: What You Get, What Comes Out of Your Pay, and What You Save

• Employee payroll tax is 7.65%, so each $1,000 paid through a Section 125 plan saves $76.50 in payroll tax before any income tax saving, per IRS Tax Topic 751 (2026).
• The 2026 salary reduction limits are $3,400 for a health FSA and $7,500 for a dependent care FSA, per IRS Publication 15-B (2026).
• Workers paid an average of $1,440 a year for single coverage and $6,850 for family coverage in 2025, per the KFF Employer Health Benefits Survey (2025).
• In the worked example below, $4,680 of benefits saves $919.62 a year for a $55,000 earner in the 12% bracket, using 2026 IRS rates.
• A 2% shareholder of an S corporation is not treated as an employee for cafeteria plan purposes, per IRS Publication 15-B (2026).

You see "Section 125" on your benefits packet or pay stub, and nobody explained it. A Section 125 plan is the employer plan that lets you pay for benefits before tax, so it usually saves you money. The rest of this page shows what it can include, what it saves, and the few cases where you should ask a question.

Reviewed by a licensed benefits professional. Last reviewed: October 5, 2026.

What is a Section 125 plan?

A Section 125 plan is a written employer plan, also called a cafeteria plan, that lets you choose between cash pay and certain benefits. Section 125 of the Internal Revenue Code says you are not taxed just because you could have taken the cash instead.

IRS Publication 15-B (2026) defines a cafeteria plan as a written plan that allows employees to choose between receiving cash or taxable benefits, instead of certain qualified benefits. The law also requires that all participants are employees and that they can choose among two or more benefits that include cash (26 U.S.C. 125(d)). In plain terms, the cost of the benefit comes out of your pay first and tax is figured on what is left.

Benecor Health's Section 125 cafeteria plan guide→ explains how employers set one up. This page is the employee side: what you actually get.

What benefits can a Section 125 plan include?

A Section 125 plan can include health, dental and vision premiums, a health FSA, a dependent care FSA, adoption assistance, group-term life insurance and HSA contributions. These are the qualified benefits the IRS lists in Publication 15-B (2026).

Some benefits cannot be in the plan. IRS Publication 15-B (2026) lists long-term care insurance, commuting benefits, educational assistance, meals and employee discounts among the items a cafeteria plan cannot offer. Your employer may still offer them outside the plan. For FSA detail, see Benecor's guide to FSA limits for health and dependent care→.

How much does a Section 125 plan save me?

A Section 125 plan saves you 7.65% in payroll tax on every dollar, plus income tax at your bracket. IRS Tax Topic 751 (2026) sets employee Social Security tax at 6.2% and Medicare tax at 1.45%.

Here is a worked example. It is hypothetical and uses 2026 rates. A single worker earns $55,000 and elects these benefits for the year:

1. Medical premium: $1,440, the KFF 2025 average worker share of single coverage.
2. Dental premium: $240.
3. Health FSA: $1,000, which is under the $3,400 limit.
4. Dependent care FSA: $2,000, which is under the $7,500 limit.
5. Section 125 total: $1,440 + $240 + $1,000 + $2,000 = $4,680.
6. Box 1, 3 and 5 wages: $55,000 minus $4,680 = $50,320.
7. Payroll tax saved: $4,680 x 7.65% = $358.02.
8. Federal income tax saved at 12%: $4,680 x 12% = $561.60.
9. Total tax saved: $358.02 + $561.60 = $919.62 a year.

The 12% rate fits this worker. The 2026 standard deduction for a single filer is $16,100, so taxable income is $50,320 minus $16,100, or $34,220, and the 22% bracket starts above $50,400 (IRS, 2026 inflation adjustments).

The same $4,680 of benefits costs this worker about $3,760.38 after the tax savings. State income tax savings would add to that in most states.

What do I give up with a Section 125 plan?

You give up flexibility, not tax savings. Your choices are generally locked for the plan year, and money left in an FSA may be forfeited unless your plan allows a carryover or grace period.

Your elections must be made before the plan year starts, and they generally cannot change mid-year except for specific events (26 U.S.C. 125; 26 CFR 1.125-4). Your lower Box 3 wages also mean the Social Security tax is figured on less pay. Most workers still come out ahead, because the tax saved is cash in hand today. Check your plan summary for its FSA rules before you elect a large amount.

Can I change or opt out of my Section 125 plan mid-year?

You generally cannot opt out of a Section 125 deduction mid-year just because you changed your mind. 26 CFR 1.125-4 says a cafeteria plan is not required to permit mid-year changes, and plans that do allow them limit them to events such as marriage, divorce, a birth or a change in employment status.

The rule exists because the tax break depends on your choice being made before the plan year starts. You can usually change your election at your employer's next open enrollment. A newer source of surprise deductions is a Section 125 wellness or indemnity plan the employer added. Benecor's guide to qualifying life events→ lists the events that can open a change window.

Who can be in a Section 125 plan?

Only employees can take part in a Section 125 plan, and the plan cannot favor highly paid workers. Owners and some shareholders are treated differently from regular staff.

26 U.S.C. 125 requires that all participants are employees and bars plans from discriminating in favor of highly compensated participants or key employees. IRS Publication 15-B (2026) says not to treat a 2% shareholder of an S corporation as an employee of the corporation for cafeteria plan purposes. If you are a business owner, your tax treatment may differ from your staff's. Benecor's guide to Section 125 plan rules→ covers the testing and eligibility rules in more detail.

Is an HSA the same thing as a Section 125 plan?

No. An HSA is a savings account you own, and a Section 125 plan is the employer plan that can route your pay into it before tax. IRS Publication 15-B (2026) lists HSAs among the benefits a cafeteria plan may offer.

Your Section 125 total on a W-2 can therefore include HSA money, premiums and FSA money together. If you want to see how the total shows up on your tax form, read Benecor's guide to what Sec 125 on a W-2 means→. For the employer side of the same plan, Summit Health Benefits publishes a Section 125 cafeteria plan guide↗.

What should I ask HR about our Section 125 plan?

You should ask HR which benefits are in the plan, which ones you are enrolled in, and when you can change them. A written answer gives you a record.

If you still cannot match a deduction to a benefit you chose, request a case review→ with a Benecor benefits expert.

Sources: IRS Publication 15-B, Employer's Tax Guide to Fringe Benefits (2026); Internal Revenue Code Section 125, 26 U.S.C. 125 (2026); 26 CFR 1.125-4, Permitted election changes (2026); IRS Tax Topic 751, Social Security and Medicare withholding rates (2026); IRS, 2026 tax inflation adjustments (2025); KFF, 2025 Employer Health Benefits Survey (2025).