HSA and FSA Limits for 2027: What to Change in Your Open Enrollment Elections

Open enrollment has a way of arriving on a Tuesday, in an email with a subject line like "Action required," while you are in the middle of something else. You click through, accept last year's choices, and close the tab. That small act of defaulting is quietly expensive, because two of the choices on that screen, the HSA and the FSA, are among the few places where the tax code simply hands you a discount for planning ahead.

The 2027 limits are out, which makes this the right month to look at the numbers again. Here is how to turn them into elections you will not regret by next spring.

The 2027 numbers

As reported from the IRS figures, the 2027 HSA contribution limit is $4,500 for self-only coverage and $9,000 for family coverage, with an extra $1,000 catch-up contribution if you are 55 or older. The health FSA limit is reported at $3,400, with a maximum carryover of $680. I am relaying these from published summaries of the IRS announcement, so confirm the figures against the IRS notice and, more importantly, your own plan documents, since employers set their own FSA rules inside the federal ceiling.

This is general information, not tax advice. Your situation, state rules and employer plan can change the answer, and a tax professional can check it against your actual return.

How much to raise your elections now

The mechanics are payroll deductions, so the question is a per-paycheck number. Take the annual target and divide it by the number of pay periods left in the plan year. Selecting $4,500 on a biweekly schedule is about $173 per paycheck, and the maximum in a family plan is closer to $346.

Whether to go to the limit depends on what the money is for. The honest approach is to start from your known medical spending, then decide whether you want the HSA to be a spending account or a saving account. If you cannot comfortably absorb the take-home reduction, a lower number you can sustain beats a limit you cancel in March. An election is a decision you live with for twelve months, not a statement of ambition.

The HSA as a stealth retirement account

The HSA is unusual because it can be taxed favourably three times: contributions are pre-tax (or deductible), growth is tax-free, and withdrawals for qualified medical expenses are tax-free. Almost nothing else in the tax code works like that. A traditional 401(k) gives you the first two on the way in and taxes the withdrawals. A Roth gives you the last two and taxes the contribution.

That is why people call it a stealth retirement account. Healthcare is a real expense in later life, and a balance that has been invested and left alone for twenty years can cover a good part of it. After 65, you can also withdraw for non-medical reasons and pay ordinary income tax with no penalty, which makes it behave like a traditional IRA in the worst case.

One habit makes this work, and it is a habit, not a trick: pay current medical bills from regular cash when you can afford to, keep the receipts, and leave the HSA invested. You can reimburse yourself later, since there is generally no deadline on reimbursing qualified expenses you incurred after the account was opened. Keep documentation that would survive an audit, and check the current rule with your custodian before relying on that.

FSA: use-it-or-lose-it versus the carryover

The FSA is a different instrument. It is a spending account, with the money available at the start of the plan year, but under the traditional rule, what you do not spend is forfeited. Plans may allow either a limited carryover (the $680 figure) or a short grace period, but not both, and some plans offer neither. This is an employer choice, so read the summary plan description before you elect.

The math to run is simple. Add up what you know you will spend: prescriptions, dental work, glasses or contacts, therapy copays, recurring appointments. Elect that figure, not the maximum. With a carryover, you have a little room for error. Without one, over-electing by $400 means you have paid $400 for nothing. A tax saving of 20 to 30 percent on a dollar you never get to use is not a saving.

If I were setting my own number, I would pick the amount I would be annoyed to be short of, not the amount I hope to need. Being slightly under-elected costs you a little tax. Being over-elected costs you the whole dollar.

Who should prioritize the HSA over extra 401(k) savings

A common ordering among savers who qualify, and a reasonable starting point: contribute to your 401(k) enough to capture the full employer match, since that is an immediate return. Then fill the HSA to the limit. Then return to the 401(k) or an IRA with what remains.

The HSA earns its place ahead of additional 401(k) dollars because of the third tax benefit: tax-free withdrawal for medical costs. It makes the most sense for people who are healthy enough to not drain it every year, who have the cash flow to pay small bills out of pocket, and who invest the balance instead of holding it in a low-yield cash option.

It makes less sense if the high-deductible plan is costing you more in uncovered care than it saves in premiums. An HSA does not rescue a plan that is wrong for your family's health. Run the total cost of the plan, premium plus likely out-of-pocket spending, before you decide the HSA is worth chasing.

HDHP eligibility traps that disqualify you mid-year

You can only contribute to an HSA while covered by a qualifying high-deductible health plan (HDHP) and generally while having no other disqualifying coverage. The traps tend to be quiet ones:

A spouse's general-purpose FSA. If your spouse has a regular health FSA that can reimburse your expenses, that can disqualify you. A limited-purpose FSA, covering only dental and vision, usually does not.
Medicare enrollment. Once you enroll in Medicare, you can no longer contribute. Enrolment in Part A can also start automatically for people who take Social Security benefits, and may be retroactive for up to six months, so plan contributions in the year you turn 65 with care.
The last-month rule. If you are eligible on December 1, you may be allowed to contribute the full annual amount, but you must remain eligible through a testing period, and failing it can trigger tax and a penalty. This is useful and risky in equal parts.
Other coverage. A second non-HDHP policy, or certain employer arrangements that pay early for care, can cost you eligibility without announcing it.
Job and plan changes. A new plan year may switch your HDHP status. Check that the plan still qualifies before you set the new payroll amount.

The common thread is that eligibility is checked month by month, and nobody sends you a warning. A short call to HR in October is cheaper than a corrected tax return in April.

A decision worksheet for your 2027 elections

Work through these in order, with last year's statements next to you.

Am I covered by a qualifying HDHP for 2027? If not, skip the HSA lines and go to step 6.
Does anything disqualify me? Spouse's general FSA, Medicare, or other coverage. If yes, fix it or stop here.
What is my HSA ceiling? $4,500 self-only or $9,000 family, plus $1,000 if I am 55 or older (employer contributions count toward the limit).
What can my paycheck sustain? Subtract the target from take-home and check that rent, groceries and a cash buffer still work.
Is the 401(k) match already captured? If not, that comes first.
What will I certainly spend on health costs? Add last year's actual receipts for prescriptions, dental, vision and therapy. Elect that number for the FSA, up to $3,400.
Does my plan offer a carryover or a grace period? If neither, round the number down.
Write down the per-paycheck amount and the date I will review it. Mid-year changes are limited, so put a reminder where you will see it.

Fifteen minutes with this list beats a click on "keep my current elections."

FAQ

Can I have both an HSA and a health FSA?

Generally not, if the FSA is a general-purpose one, because that disqualifies HSA contributions. A limited-purpose FSA for dental and vision usually pairs with an HSA, and so do some post-deductible designs. Confirm with your plan.

What happens to my HSA if I leave my job?

The money is yours. An HSA belongs to you, not to the employer, and it can stay invested, be moved to a different custodian, or keep being used for qualified expenses.

Is the FSA carryover automatic?

No. The carryover is an option the employer may adopt. Some plans use a grace period instead, and some offer neither, so check your plan documents.

Should I always max the HSA?

Not always. It depends on your cash flow, whether you have captured an employer match, and whether the HDHP is the right plan for your family's health in the first place.

The defaults on that enrollment screen were set by someone else's convenience. The numbers are only worth what you do with them in the next few weeks.