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Updated April 2026 · Florida Plan Finder · Licensed Florida Health Insurance Producer

Pre-Tax vs Post-Tax Health Insurance Payroll Deductions for Florida Small Business

When a Florida small business deducts an employee's share of health insurance premium from the paycheck, that deduction can either come out of gross pay (pre-tax) or net pay (post-tax). The difference is meaningful: a pre-tax deduction reduces taxable wages for both federal income tax and FICA, saving the employee 7.65% FICA + their marginal federal rate, and saving the employer the matching 7.65% FICA. The mechanism that makes this possible is a Section 125 cafeteria plan. Without one, all employee premium contributions are post-tax by default.

Related resources:

Section 125 Plans HSA + HDHP Guide How to Deduct Premiums

How the Two Methods Affect a Paycheck

LinePost-Tax (No Section 125)Pre-Tax (With Section 125)
Gross wage$1,500$1,500
Pre-tax premium deduction$0($150)
Taxable wage$1,500$1,350
Federal income tax (12% bracket)($180)($162)
FICA (7.65%)($114.75)($103.28)
Post-tax premium deduction($150)$0
Net paycheck$1,055.25$1,084.72

The employee gains ~$29.47 per check ($766 per year on biweekly). The employer also saves $11.47 per check ($298 per year per employee) on the FICA match.

FICA Savings by Income Range

Annual Premium ContributionEmployee FICA SavingsEmployer FICA Savings
$1,800/yr ($150/mo)$138$138
$3,600/yr ($300/mo)$275$275
$6,000/yr ($500/mo)$459$459

Setup Steps for Section 125 Pre-Tax

  1. Establish a written Section 125 plan document — most payroll providers (Gusto, ADP, Paychex) include this; standalone documents from benefit admin firms cost $150-$500
  2. Distribute summary plan description to employees
  3. Hold an annual open enrollment with election forms
  4. Configure payroll system to deduct elections from pre-tax wages
  5. Track elections — Section 125 elections are irrevocable mid-year except for qualifying life events

Who Cannot Participate Pre-Tax

Several groups are excluded from Section 125 pre-tax treatment under IRS rules:

These individuals can still receive coverage, but the premium share they pay is post-tax (with potentially a recovery deduction on the personal return for owners).

Mid-Year Election Change Rules

Section 125 elections are locked for the plan year. Mid-year changes require a qualifying status change event:

Frequently Asked Questions

Can I retroactively make premiums pre-tax for the year?

No — Section 125 requires a written plan document in place before the election begins, and elections must be prospective. You can implement Section 125 mid-year for the remainder of the plan year, but you cannot retroactively change prior periods.

Is the Section 125 plan document expensive?

Most Florida payroll providers include the plan document at no extra charge or as a low-cost add-on ($10-$30/month). Standalone documents from benefits administrators run $150-$500 one-time. The annual FICA savings even on a 5-employee group typically exceeds the document cost.

Does pre-tax payroll deduction reduce my W-2 Box 1 wages?

Yes — pre-tax premium deductions reduce W-2 Box 1, Box 3 (Social Security wages), and Box 5 (Medicare wages). Some employers list the pre-tax deduction in Box 14 for transparency; this is informational only.

Convert Post-Tax to Pre-Tax Premiums for Your Florida Business

A licensed Florida broker can help establish a Section 125 plan during your next open enrollment.

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Licensed Florida Health Insurance Producer · NPN #21249133
Section 125 rules are governed by IRC Section 125 and IRS regulations. Consult a payroll or benefits professional for plan setup.