A cafeteria plan deduction saves more than a normal tax deduction — it avoids income tax and the 7.65% FICA that most deductions never touch. Enter your premium, FSA and dependent care elections to see the true annual saving at your bracket.
| Household | Salary | Fed + State | Annual Tax Saved |
|---|---|---|---|
| Single, 22% bracket, $6,000 premium + $2,000 FSA | $75,000 | 22% + 5% | $3,096 |
| Married, 24% bracket, family plan + DCAP | $150,000 | 24% + 6% | $10,389 |
| Single, 12% bracket, high-deductible + HSA | $52,000 | 12% + 4% | $2,119 |
| Married, 32% bracket, max DCAP only | $280,000 | 32% + 5% | $2,788 |
| Single, 35% bracket, no state income tax | $400,000 | 35% + 0% | $5,888 |
Every row above is produced by the same formula the calculator uses: (premium + FSA/DCAP/HSA) × (income tax rate + 7.65% FICA), plus out-of-pocket spending × income tax rate. The FICA portion is what separates a Section 125 deduction from an above-the-line deduction like the IRA or student-loan interest deduction — those save income tax only.
Why higher earners save more per dollar and also why the rate column matters: a 22% federal + 5% state household keeps 34.65¢ of every pre-tax dollar (27% income tax + 7.65% FICA), while a 12% + 4% household keeps only 23.65¢.
A cafeteria plan (IRC §125) is the legal wrapper your employer uses so that your payroll deductions come out before tax rather than after. You elect an amount during open enrollment, it is deducted from each paycheck, and it never appears in Box 1 (federal wages), Box 3 (Social Security wages), or Box 5 (Medicare wages) of your W-2 — depending on the benefit.
| Benefit | Avoids income tax? | Avoids FICA (7.65%)? | 2026 limit |
|---|---|---|---|
| Health insurance premium | Yes | Yes | No limit |
| Health FSA | Yes | Yes | $3,300 (2026 est.) |
| Dependent care FSA (DCAP) | Yes | Yes | $7,500 married / $5,000 single |
| HSA via cafeteria plan | Yes | Yes when run through §125 | $4,400 self / $8,750 family |
| HSA funded directly (not payroll) | Yes | No | Same |
| Commuter / parking | Yes | Yes | $340/mo transit, $340/mo parking |
FICA is 6.2% Social Security plus 1.45% Medicare. Social Security tax stops at the wage base ($184,500 in 2026 for the employee share), so a deduction taken above that base saves only the 1.45% Medicare portion, not 7.65%. This calculator applies the full rate, which slightly overstates savings for very high earners — the difference is small for most households but material above $184,500.
Most tax deductions reduce income tax only. A cafeteria plan deduction reduces income tax and both halves of FICA at the source, which is why the effective return on a Section 125 dollar is often 30–40% rather than the 22–24% marginal bracket alone. For a household in the 24% federal bracket with a 6% state rate, every $1,000 routed through payroll saves $376 — not the $240 that a comparable itemized deduction would deliver.
There is a second, quieter advantage: the saving is automatic and predictable. An itemized deduction depends on clearing the standard deduction first; a payroll deduction is realized in every single paycheck. That makes it the most reliable tax planning lever available to a W-2 employee who does not itemize.
A health FSA's use-it-or-lose-it rule is a real cost. Electing $3,300 and spending only $1,800 forfeits $1,500 — far more than the roughly $1,140 of tax saved on that $3,300. Sizing the election to predictable expenses (recurring prescriptions, planned procedures, glasses, orthodontia) rather than aspirational spending is the difference between a winning and a losing FSA.
HSA contributions do not carry this risk. If you are eligible, the HSA is almost always the better first dollar: it is portable, never expires, can be invested, and can reimburse you years later for receipts you keep now.
⚠️ Important: This tool estimates the federal and state tax saving from payroll deductions run through a Section 125 cafeteria plan. It applies the full 7.65% FICA rate and does not model the Social Security wage base cap ($184,500 for 2026), so savings for very high earners are slightly overstated. Dollar limits shown are estimates for the 2026 plan year and index annually — confirm your plan's actual limits and its use-it-or-lose-it rules (carryover vs. grace period) with HR before enrolling.