Payroll tools and source-backed guidance
Flexible Spending Account (FSA)
Flexible Spending Account (FSA) paystub meaning: A pre-tax account for medical or dependent care costs that is set once a year and generally forfeited if...
A pre-tax account for medical or dependent care costs that is set once a year and generally forfeited if unspent.
A Flexible Spending Account is an employer-run account you fund by electing a yearly amount, which payroll then splits evenly across your paychecks. There are two separate kinds and stubs often carry both. A health FSA pays medical, dental and vision costs; for plan years beginning in 2026 your salary reduction into one cannot exceed $3,400. A dependent care FSA pays for childcare or adult day care so you can work; for 2026 the exclusion is $7,500, or $3,750 if married filing separately, raised from $5,000. The two follow opposite funding rules, and this is the part almost nobody explains. A health FSA must provide uniform coverage: the entire annual election is available to you from the first day of the plan year, no matter how little has been deducted so far. Elect $2,400 and you can spend $2,400 in January. A dependent care FSA works the other way, reimbursing only what has actually been deducted to date, which is why a January claim on it often comes back partly unpaid. Both reduce taxable wages and both are outside Social Security and Medicare tax, so the saving is larger than your income tax bracket alone suggests. Unspent money at the end of the plan year is forfeited. A plan may soften that for a health FSA with a carryover, capped at $680 for 2026, or with a grace period of up to two and a half months, but not both, and it is allowed to offer neither. Your plan document states which applies.
A deduction can be pre-tax, post-tax, voluntary, or required. Its label alone does not establish how it affects taxable wages, so check the plan document, employee election, payroll policy, and year-to-date amount.
When this term appears on a statement, read its label, current amount, year-to-date amount, pay-period context, and any adjacent rate or hours together. Resolve a mismatch with the original issuer or the cited authority rather than changing a record to force a preferred result.
Example
Health FSA election of $2,400, paid biweekly over 26 periods. Per-check deduction: $2,400 / 26 = $92.31. That is the figure on the HCFSA line. Available to spend on day one of the plan year: the full $2,400, even though only $92.31 has been deducted. That is the uniform coverage rule. Tax not charged over the year, at a 22% federal bracket: income tax: $2,400 x 22% = $528.00 Social Security and Medicare: $2,400 x 7.65% = $183.60 total kept: $711.60 Forfeiture risk: spend $1,900 of it and $500 is unused. If the plan offers the 2026 carryover, the full $500 rolls forward, because the carryover cap is $680 and $500 sits under it. If the plan offers neither a carryover nor a grace period, the $500 is lost.
Source: IRS - tax inflation adjustments for tax year 2026 (Rev. Proc. 2025-32)
Related terms
- Health Savings Account (HSA) — A bank account you own for medical costs, funded by pre-tax payroll deductions, open only to people on a qualifying high-deductible health plan.
- Pre-Tax Deduction — A deduction taken before tax is calculated — but it does not lower every tax, and which ones it lowers depends on the benefit.
- Health Insurance Premium — Your share of the employer plan premium, taken each pay period — and if it runs through a Section 125 plan, taken before income tax and FICA.