I The four accounts
Federal employees have access to four distinct tax-advantaged accounts here, and the differences between them decide everything that follows.
| Account | Covers | HSA-compatible? |
|---|---|---|
| Health Care FSA (HCFSA) | General medical, dental, vision | No — disqualifying |
| Limited Expense FSA (LEX HCFSA) | Dental and vision only | Yes |
| Dependent Care FSA (DCFSA) | Childcare and dependent care | Yes |
| Health Savings Account (HSA) | Qualified medical expenses | Requires a qualifying HDHP |
The first three run through FSAFEDS. The HSA runs through your FEHB carrier and a trustee, and requires enrollment in a qualifying high-deductible plan.
The Limited Expense FSA exists precisely to solve the disqualification problem — it is the account that lets you hold an HSA and still get pre-tax treatment on dental and vision, and most employees who need it have never heard of it.
II The 2026 limits
| Account | 2026 limit | Change from 2025 |
|---|---|---|
| Health Care FSA | $3,400 | +$100 |
| Limited Expense FSA | $3,400 | +$100 |
| Dependent Care FSA — household | $7,500 | +$2,500 |
| Dependent Care FSA — married filing separately | $3,750 | +$1,250 |
| FSA carryover into 2027 | $680 | +$20 |
| FSAFEDS minimum election | $100 | Unchanged |
| HSA — self-only | $4,400 | +$100 |
| HSA — family | $8,750 | +$200 |
| HSA catch-up, age 55+ | $1,000 | Unchanged |
Two structural points worth noting. The $3,400 health FSA limit is per employee, so two working spouses can each elect $3,400 through their own plans. The $7,500 dependent care limit is per household regardless of who earns it — the reverse arrangement, and a common source of over-election.
Employer contributions count against the HSA limit. If your FEHB carrier funds a portion of your HSA, that amount reduces what you may personally contribute.
III The dependent care increase
The $5,000 dependent care limit was set in 1986 and was never indexed for inflation. It sat unchanged for forty years while childcare costs did not.
For 2026 it rises to $7,500 per household — an additional $2,500 of pre-tax capacity.
What the additional $2,500 is worth
Dependent care FSA contributions avoid federal income tax and, unlike a deduction, also avoid FICA — Social Security and Medicare — because they come out before those taxes apply.
At a 22 percent marginal federal rate plus 7.65 percent FICA, the combined saving on $2,500 is roughly $740.
The caution is the same as it has always been: dependent care FSA funds are use-it-or-lose-it and the $680 carryover applies to health care FSAs, not this one. A higher ceiling is only useful if you will actually incur the expenses. Elect against your real anticipated costs, not against the maximum.
IV The disqualification rule
This is the rule that costs people the most, because it operates silently — you do not find out you were ineligible until you have already contributed.
A general-purpose health care FSA is disqualifying coverage for HSA purposes. Enrolling in one ends your HSA eligibility for that coverage period.
The logic is that an HDHP is supposed to leave first-dollar medical costs to the HSA. A general-purpose FSA pays exactly those costs, so holding both would duplicate the benefit.
| If you hold this | Can you contribute to an HSA? |
|---|---|
| Health Care FSA (general purpose) | No |
| Limited Expense FSA (dental and vision only) | Yes |
| Dependent Care FSA | Yes |
| Any part of Medicare | No |
| Claimed as a dependent on another return | No |
| A non-qualifying health plan | No |
The Limited Expense Health Care FSA covers dental and vision only, which is precisely why it does not duplicate what the HDHP leaves to the HSA. You can fund an HSA to $4,400 or $8,750 and a LEX HCFSA to $3,400 in the same year. If you are on an HDHP and have real dental or vision costs, this is the pairing to use — and it is routinely missed because the account has an unmemorable name.
V The spouse trap
Your HSA eligibility does not depend only on your own elections.
If your spouse enrolls in a general-purpose health care FSA through their own employer, that coverage disqualifies you. FSA funds can be spent on either spouse's medical expenses, so the coverage reaches you even though you did not elect it and may not know it exists.
If you are pursuing an HSA strategy and your spouse has benefits through another employer, coordinate the elections explicitly. A spouse's limited-purpose FSA does not create this problem, so the fix is often as simple as your spouse choosing the limited version. Discovering the conflict after a year of HSA contributions means excess contributions, a correction, and potential tax consequences.
VI Account Compatibility Planner
Select your plan and elections. The tool flags disqualification conflicts and shows your available limits.
What can you actually hold?
Checks the disqualification rules and totals your pre-tax capacity for 2026.
2026 Pre-Tax Capacity by Account
Maximum annual contribution for each account in the 2026 benefit period. The dependent care figure reflects the increase from $5,000, its first change since 1986. HSA figures exclude the $1,000 catch-up available at age 55 and older.
VII What qualifies as an HDHP
Two tests, both of which must be met. A plan marketed as high deductible does not qualify unless the numbers land inside these ranges.
| 2026 requirement | Self-only | Family |
|---|---|---|
| Minimum annual deductible | $1,700 | $3,400 |
| Maximum out-of-pocket | $8,500 | $17,000 |
The out-of-pocket maximum includes deductibles, copayments, and coinsurance — but not premiums.
A plan with a deductible below the minimum does not qualify, and contributing to an HSA while enrolled in it creates excess contributions and a tax problem. FEHB plan brochures state whether a plan is HSA-qualified. Check the brochure rather than the marketing, and re-check in any year you change plans — plan designs shift and a plan that qualified last year may not this year.
Eligibility is also tested monthly, on the first day of each month. You must be covered by a qualifying HDHP, have no other disqualifying coverage, not be enrolled in any part of Medicare, and not be claimable as a dependent. Plan comparison during open season is covered in Topic 30.
VIII Why the HSA is different
The HSA is not simply a better FSA. It is a different kind of instrument, and the differences compound.
| FSA | HSA | |
|---|---|---|
| Unused funds | Forfeited beyond $680 carryover | Roll over indefinitely |
| Portability | Tied to employment | Fully portable — yours on separation or retirement |
| Investment | No | Yes — can be invested for decades |
| Requires an HDHP | No | Yes |
| Full election available day one | Yes, for health care FSA | No — funds accrue as contributed |
| Tax treatment | Pre-tax in, tax-free out | Pre-tax in, tax-free growth, tax-free out |
That last row is the one people mean by the triple tax advantage — contributions avoid tax, growth avoids tax, and qualified withdrawals avoid tax. No other account available to a federal employee does all three.
The health care FSA makes your entire annual election available on day one, before you have contributed it. An employee facing a large expense in January can elect $3,400 and spend it immediately. An HSA has only what you have actually put in. For someone with predictable near-term medical costs and no appetite for a high deductible, the FSA is genuinely the better instrument — the HSA advantage assumes you can absorb the deductible and leave the balance alone.
IX The re-enrollment trap
FSAFEDS enrollment does not carry forward. You must actively re-enroll during every open season or you have no account for the coming year.
This is different from every other federal benefit. FEHB, FEDVIP, and FEGLI enrollments continue automatically if you do nothing. FSAFEDS does not.
Nobody decides to give up their FSA. They simply do not re-enroll, and discover it in January when a claim is rejected. The employees it catches are the ones who had already concluded the benefit was worth having. Re-enrollment also preserves your carryover — unused funds up to $680 roll forward only if you re-enroll, so skipping open season forfeits both the new year's account and last year's remaining balance.
Open Season for the 2026 plan year ran November 10 through December 8, 2025. The general rule is the Monday of the second full workweek in November through the Monday of the second full workweek in December.
X Carryover and forfeiture
The rules differ by account, and confusing them is expensive.
- Health Care FSA and Limited Expense FSA: up to $680 of unused funds carries into 2027 — but only if you re-enroll for 2027.
- Dependent Care FSA: no carryover. Unused funds are forfeited.
- HSA: no forfeiture at all. Everything rolls forward indefinitely.
The practical implication is that dependent care elections deserve more care than health care elections. A health care FSA over-election costs you at most the amount above $680. A dependent care over-election costs you the entire unused balance.
One further note for anyone leaving federal service: FSA balances generally do not survive separation, and claims must be for expenses incurred before your separation date. The HSA, by contrast, is yours regardless — see Topic 04.
XI Where these sit in the priority order
Federal employees have more tax-advantaged capacity than they can usually fund. A common general framework:
- TSP to the full agency match — 5 percent of basic pay. An immediate guaranteed return nothing else matches.
- HSA, if you are on a qualifying HDHP — the only triple-tax-advantaged account available to you.
- Dependent care FSA up to your actual anticipated costs, since it avoids FICA as well as income tax.
- TSP toward the elective deferral limit — $24,500 for 2026.
- Health care or limited expense FSA against realistic expected expenses.
The right order depends on your actual medical costs, your tax situation, whether you can absorb a high deductible, and your household's other coverage. Nothing here is advice about your circumstances — the TSP match at the top is the one step that holds for essentially everyone, and the rest is genuinely situational. TSP contribution mechanics are in Topic 12.
XII The playbook
| Situation | What to do |
|---|---|
| On an HDHP with dental or vision costs | Use a Limited Expense FSA, not a general-purpose one. |
| Spouse has FSA through another employer | Coordinate elections. A general-purpose FSA disqualifies your HSA. |
| Paying for childcare | The limit is now $7,500. Elect against real costs — no carryover. |
| Considering an HDHP | Verify the plan brochure says HSA-qualified. Check deductible against $1,700 / $3,400. |
| Large predictable expense in January | The health FSA gives full access day one. The HSA does not. |
| Open season is running | Re-enroll in FSAFEDS. It does not carry forward and neither does your $680. |
| Turning 55 this year | You can add $1,000 to your HSA contribution. |
| Leaving federal service | The HSA is yours. FSA balances generally are not. |
Before the next open season closes
- Re-enroll in FSAFEDS — enrollment does not carry forward, and skipping it forfeits your $680 carryover too.
- If you are on an HDHP, do not elect a general-purpose health care FSA — it ends your HSA eligibility.
- Use the Limited Expense FSA instead if you have dental or vision costs and want to keep the HSA.
- Ask your spouse which FSA type they elected. A general-purpose one through their employer disqualifies you.
- Check your plan brochure to confirm it is HSA-qualified before contributing anything.
- Elect dependent care against actual anticipated costs — the new $7,500 ceiling has no carryover.
- Remember the health FSA limit is per employee while dependent care is per household.
- Subtract any employer HSA contribution from what you personally contribute.
- Add the $1,000 catch-up if you turn 55 at any point during the year.
- Capture the full TSP agency match before funding any of these accounts.
Frequently asked questions
For the 2026 benefit period the health care FSA and limited expense health care FSA limits are $3,400 each, up $100 from 2025, with a carryover maximum of $680 into 2027 if you re-enroll. The dependent care FSA limit rose to $7,500 per household, or $3,750 if married filing separately. HSA limits are $4,400 for self-only coverage and $8,750 for family coverage, with an additional $1,000 catch-up contribution available if you are 55 or older by December 31. The minimum annual FSAFEDS election remains $100.
Because it had not moved in forty years. The $5,000 dependent care FSA limit was established in 1986 and was never indexed for inflation, so the increase to $7,500 per household is the first permanent change in four decades rather than a routine annual adjustment. For a federal employee paying for childcare or adult dependent care, that is an additional $2,500 of pre-tax capacity, which at a 22 percent marginal rate plus FICA is worth several hundred dollars a year in avoided tax.
It depends entirely on which FSA. A general-purpose health care FSA is disqualifying coverage and ends your HSA eligibility for that coverage period, because it can pay the same first-dollar medical expenses the high-deductible plan is supposed to leave to the HSA. A limited expense health care FSA, which covers only dental and vision, is compatible — you can fund an HSA to its full limit and a limited expense FSA to $3,400 in the same year. A dependent care FSA is also compatible, since it covers childcare rather than medical expenses.
Yes, and this catches couples constantly. If your spouse enrolls in a general-purpose health care FSA through their own employer, that coverage disqualifies you from contributing to an HSA — because FSA funds can be spent on either spouse's medical expenses, the coverage reaches you even though the election is not yours. A spouse's limited expense FSA does not create this problem. If you are pursuing an HSA strategy, this is worth coordinating explicitly during open enrollment rather than assuming your accounts are independent.
For 2026 the plan must have a deductible of at least $1,700 for self-only coverage or $3,400 for family coverage, and its annual out-of-pocket maximum cannot exceed $8,500 for self-only or $17,000 for family. Both tests must be met. A plan marketed as high deductible that falls below the minimum deductible does not qualify, and enrolling in it means you cannot contribute to an HSA regardless of what the plan is called. Several FEHB carriers offer qualifying HDHP options, and the plan brochure states whether it is HSA-qualified.
It lapses entirely. FSAFEDS enrollment does not carry forward automatically the way FEHB and FEDVIP enrollments do — you must actively re-enroll each open season or you have no account for the coming year. This is the single most common and most avoidable federal benefits mistake, because it costs employees a benefit they had already decided they wanted. Re-enrollment is also what preserves your carryover: unused funds up to $680 roll into the following year only if you re-enroll.
The most consequential difference is permanence. HSA funds never expire, roll over indefinitely, and the account is fully portable — it stays yours if you change plans, change employers, or retire, and it can be invested for decades. FSA funds are use-it-or-lose-it apart from the limited carryover, and the account is tied to your employment. The HSA also requires enrollment in a qualifying high deductible plan, while an FSA does not. For a federal employee who can tolerate a high deductible, the HSA is the more powerful long-term vehicle.
The general priority most planners apply is to first contribute enough to the TSP to capture the full agency match, since that is an immediate guaranteed return no other account matches, and then consider the HSA, which carries a triple tax advantage — pre-tax contributions, tax-free growth, and tax-free withdrawals for qualified medical expenses. After that, returning to the TSP toward the elective deferral limit is common. This is a general framework rather than advice for your circumstances, and the right answer depends on your expenses, tax situation, and risk tolerance.