A health Flexible Spending Account (FSA) carryover lets a limited leftover balance roll into the next plan year instead of vanishing at midnight on December 31 (or your plan year-end). It is not unlimited rollover like an HSA. It is also not the same calendar as a grace period, which gives extra weeks to incur prior-year expenses. IRS plan-design rules generally stop a health FSA from offering both a full grace period and a carryover at once.
Account framing: HSA and FSA basics and Healthcare FSA. Grace-period calendar detail: FSA grace period. Full rule map: Understanding flexible spending account rules.
Carryover vs grace period vs run-out
| Feature | What moves year to year? | What you must do |
|---|---|---|
| Carryover | Up to a capped dollar amount becomes available in the next plan year | Spend or plan above the cap before year-end; confirm cap in the SPD |
| Grace period | Nothing “rolls”; you get extra weeks to incur prior-year eligible expenses | Use care/purchases before grace ends; then submit claims |
| Run-out | Neither: only time to file claims for expenses already incurred | Meet the portal deadline with receipts |
Administrators such as HealthEquity, WEX, Fidelity benefits portals, and employer HR tools label these differently. The summary plan description (SPD) wins over Slack folklore.
Dependent care FSAs usually do not follow health-FSA carryover rules; read that plan separately.
How carryover works in practice
- Plan year ends with a leftover balance.
- Amount up to the IRS/plan carryover limit for that year moves into the new year.
- Dollars above the cap are still use-it-or-lose-it unless you spent them in time.
- Carryover funds are typically available for eligible expenses in the new year (confirm ordering rules if you also elect a new contribution).
- Mid-year job change can complicate access; ask HR about run-out and whether carryover survives termination.
Eligible expense cues: FSA eligible expenses. Big deductible timing pairs with Health insurance deductibles.
Worked example: $900 left under a carryover plan
Casey has $900 left on December 5 in a health FSA that uses carryover (illustrative cap $640; confirm the live IRS/plan figure for your year).
| Action | Result (illustrative) |
|---|---|
| Spend $0 more | ~$640 rolls; ~$260 forfeited |
| Buy eligible glasses + OTC for $280 by Dec 31 | ~$620 rolls; little or no forfeiture |
| Assume a grace period through March | Wrong plan design → risk forfeiting the amount above the cap |
Casey checks the portal label (“carryover eligible”), schedules an eye exam, keeps itemized receipts, and sets next year’s election knowing ~$640 may already sit in the account on January 1.
Election planning with carryover
- Lower next year’s election if a large carryover will already cover early-year expenses; avoid stacking unused cash.
- Do not cut the election to zero without reading whether carryover alone meets your expected care (orthodontia deposits, known surgeries, glasses).
- Open enrollment is the moment to align contribution with leftover rules, not February panic.
- If your plan uses grace period instead, carryover math does not apply; use the grace guide’s calendar.
Checklist
- SPD search: “carryover,” “grace period,” “run-out,” and the dollar cap.
- Write year-end incur date and claim deadline on a calendar.
- Spend down amounts above the carryover cap with documented eligible expenses.
- Adjust next year’s election for expected carryover.
- Save EOBs and itemized receipts; card swipes alone can fail audit.
- On job change, ask HR in writing what happens to carryover and run-out.
Educational only. Not tax, legal, or benefits advice. IRS carryover caps and employer plan designs change by year; verify with your plan administrator and current IRS FSA guidance.