Excess HSA Contribution Removed in 2026: Why 1099-SA May Arrive Next Year

If you removed a 2025 excess HSA contribution in 2026, do not panic if the tax forms feel split across two years. The cleanup can affect the 2025 return you are filing now and a later Form 1099-SA reporting cycle. That is the part that trips people up: the excess may belong to 2025, but the custodian’s distribution form can follow the calendar year when the money was actually distributed.

For many taxpayers, that means a return of excess processed in 2026 may be reported on a 2026 Form 1099-SA that arrives in early 2027. The 2025 return still cannot wait for future-you’s mailbox. This article is for U.S. taxpayers who discovered a possible 2025 HSA excess during the 2026 filing season, especially when the HSA custodian returned the excess in 2026 or says the 1099-SA will come later.

It also explains where Form 8889, Form 5329, Form 1099-SA, and Form 5498-SA fit. This is educational information, not personal tax, legal, benefits, or investment advice. If your case involves employer corrections, Medicare retroactive coverage, a spouse’s FSA, disaster relief, combat-zone rules, state tax, or a return you already filed with several moving pieces, use a qualified tax professional.

Quick answer: if a 2025 excess HSA contribution was returned in 2026, the later Form 1099-SA timing does not by itself tell you to ignore the 2025 return. Use the custodian confirmation, your 2025 contribution records, Form 8889 instructions, and Form 5329 logic now. The returned excess and related earnings may also create 2026 reporting that shows up on the next Form 1099-SA cycle.

May 16 refresh: the 1099-SA timing trap

This May 16, 2026 refresh is focused on one search question: If I removed a 2025 excess HSA contribution in 2026, why does my HSA custodian say the 1099-SA comes next year? The short version is that you are dealing with two clocks. One clock is the tax year of the HSA contribution.

The other clock is the calendar year of the HSA distribution. IRS Publication 969 says 2025 HSA contributions could be made through April 15, 2026 when designated for 2025. The IRS Instructions for Form 8889 say excess contributions you make can be treated as not contributed if you withdraw them by the due date, including extensions, of your 2025 return, do not deduct the withdrawn amount, and withdraw the income earned on it.

The IRS Instructions for Forms 1099-SA and 5498-SA tell payers to enter the calendar year for the form being filed and use distribution code 2 for excess HSA contribution distributions. So the clean way to think about it is this:

Question	Practical answer
Did the contribution exceed your 2025 HSA limit?	Use 2025 eligibility, 2025 contribution records, employer amounts, and Form 8889 logic
Was the 2025 excess returned in 2026?	Keep the custodian return-of-excess confirmation and earnings calculation
Will Form 1099-SA arrive later?	It may, because the custodian generally reports HSA distributions for the calendar year when they occurred
Do you wait for that later form to fix the 2025 return?	Usually no; use records and instructions now, then match the later form when it arrives
Does Form 5329 still matter?	Yes, if excess remains, prior-year excess carries forward, or the 6% additional tax must be calculated

The action order is plain:

confirm the excess is real,
identify the tax year of the contribution,
request the custodian’s return-of-excess process before moving money,
keep the return confirmation and earnings calculation,
report the HSA activity on Form 8889 and Form 5329 if required,
save the later Form 1099-SA or Form 5498-SA when it arrives.

An HSA excess is not fixed by guesswork. It is fixed by dates, forms, custodian records, and not pretending the 6% number is a one-time decoration.

Stop the penalty from becoming an annual habit

IRS Publication 969 says the 6% excise tax generally applies to HSA excess contributions, and that the tax applies for each tax year the excess remains in the account. The 2025 Instructions for Form 5329 use Part VII for additional tax on excess HSA contributions. The 2025 Instructions for Form 8889 are the practical traffic map for HSA contributions, distributions, returned excess contributions, and related earnings. That means the real question is not only: “Did I overcontribute?” It is: “What path stops this from repeating next year?”

If the excess is found here	First question	Likely cleanup lane
Before filing and before the applicable due date	Can the custodian process a return of excess and earnings?	Return of excess, Form 8889 reporting, keep confirmation
Before filing with a valid extension	Does the HSA rule’s due-date language include your extended return deadline?	Confirm extension status, then coordinate custodian and tax reporting
After a timely filed return	Are you within the six-month relief path described in the instructions?	Amended-return route may apply; do not freestyle the withdrawal
After the deadline with excess still inside the HSA	Is the excess carrying into another tax year?	Form 5329, 6% excise tax, and carry-forward absorption analysis
Prior-year excess plus new current-year contributions	Is there unused current-year HSA room?	Reduce new contributions or absorb only if the rules and room allow

The 2026 deadline answer

For most calendar-year individual taxpayers, the IRS listed April 15, 2026 as the deadline to file and pay federal income tax for the 2025 return. The IRS also said a valid extension could give taxpayers until October 15, 2026 to file the return. The extension did not move the payment deadline.

That matters for normal tax balances. For HSA excess contributions, the timing question is slightly different. The IRS HSA materials say you may withdraw some or all excess HSA contributions and avoid the 6% excise tax on the withdrawn amount if the excess contribution and related earnings are withdrawn by the due date, including extensions, of the return for the year the contributions were made. So the practical 2026 filing-season checklist is this:

Situation	Main date to watch	Practical move
You have not filed and did not extend	April 15, 2026 for most calendar-year 2025 returns	Confirm the excess and request return of excess before filing
You requested a valid extension	October 15, 2026 for most calendar-year 2025 returns	You may have more time to file and potentially correct before the extended due date
You already filed on time without withdrawing	Six months after the due date excluding extensions, often October 15, 2026 for the 2025 return	IRS instructions describe an amended-return route with section 301.9100-2 language
The excess remains after the deadline	End of the tax year and later years	Form 5329, possible 6% excise tax, and carry-forward absorption may matter
The contribution is for tax year 2026	2026 return cycle, generally filed in 2027 for calendar-year taxpayers	Use the 2026 HSA limits and avoid repeating the same mistake

Notice the word “most.” Some taxpayers have special deadlines. Disaster relief can move dates.

Combat-zone rules can move dates. U.S. taxpayers abroad may have special filing rules.

Fiscal-year taxpayers do not use the same calendar-year rhythm. State tax rules can be different. Do not treat a blog post as your personal due-date engine. Use the IRS page for your situation, your tax professional, and your custodian’s instructions.

First confirm the excess is real

The worst HSA move is to request a return of excess before confirming there is actually an excess. Not dramatic. Just annoying.

And with tax forms, annoying usually sends an invoice later. Start with Form 8889 logic. Form 8889 is the form used to report HSA contributions, HSA distributions, the HSA deduction, and certain HSA-related income or additional tax.

For a 2025 return, you need to know whether the contribution belongs to 2025, whether it was made by you, whether it was made by your employer, and whether your actual allowed contribution limit was lower than the amount that landed in the account. Use this pre-filing checklist:

Check	Why it matters
Tax year designation	A 2026 deposit may be designated for 2025 or for 2026
Your HSA contributions	Personal contributions can affect your deduction on Form 8889
Employer contributions	Payroll and employer HSA amounts are generally shown on Form W-2 box 12 code W
Contributions made in early 2026 for 2025	IRS Publication 969 says 2025 HSA contributions could be made through April 15, 2026
Employer contributions made in 2026 for 2025	IRS instructions include a Form 8889 employer contribution worksheet for this timing
HDHP coverage months	HSA eligibility is monthly unless a special rule applies
Medicare enrollment	Beginning with Medicare enrollment, the HSA contribution limit can become zero for affected months
Spouse or family coverage	Family HDHP coverage and spouse rules can change how the limit is split
Age 55 catch-up	The extra $1,000 catch-up is individual, not a joint family add-on
Prior-year excess	A prior-year excess may be absorbed only if there is unused current-year HSA room

This is where many HSA cleanup questions come from. Someone sees a contribution total and assumes the IRS limit is the only question. It is not.

The IRS limit is only the ceiling after eligibility, tax-year designation, employer reporting, and prior-year leftovers are sorted. For 2026 planning, Rev. Proc. 2025-19 set the HSA contribution limits at $4,400 for self-only HDHP coverage and $8,750 for family HDHP coverage.

The same IRS revenue procedure set the 2026 HDHP minimum deductibles at $1,700 for self-only coverage and $3,400 for family coverage. It also set the 2026 HDHP out-of-pocket maximums at $8,500 for self-only coverage and $17,000 for family coverage. Those numbers are useful for 2026 payroll planning.

They do not automatically fix a 2025 excess on a 2025 return. Different tax year. Different bucket. Same paperwork problem.

What to fix before filing

If you have not filed yet, the cleanest workflow is usually not “file first and figure it out later.” The cleaner workflow is:

confirm the excess,
call or message the HSA custodian,
request the custodian’s return-of-excess-contribution process,
withdraw the excess contribution and the net income attributable to it if required,
do not deduct the withdrawn excess,
report the HSA activity correctly on Form 8889,
keep the custodian confirmation with your tax records.

The custodian step matters. Do not simply take a normal HSA distribution and hope tax software understands your intentions. A normal distribution may be reported differently than a return of excess contribution.

The IRS instructions for Form 8889 say returned excess contributions and earnings included on line 14a are also included on line 14b when withdrawn by the due date, including extensions, of the return. The same instructions say excess contributions you make can be treated as if they had not been contributed if you withdraw them by the due date including extensions, do not claim a deduction for the withdrawn contribution, and withdraw the income earned on that contribution.

That is the core before-filing fix. The income piece is easy to miss. Publication 969 says the income earned on the withdrawn excess contribution is included in Other income for the year you withdraw the contribution and earnings.

So if the HSA custodian returns a 2025 excess contribution in 2026, the earnings may be a 2026 income item. That can feel weird because the excess belonged to the 2025 return. But the IRS wording separates the contribution year from the year the earnings are withdrawn. That is why you should keep the custodian confirmation. You may need it when the later form arrives.

What an extension can and cannot fix

A filing extension is not a magic eraser. But for HSA excess timing, it can be useful. The IRS extension release for 2026 said taxpayers could get until October 15, 2026 to file the federal return if they requested an extension by April 15, 2026.

It also said taxes owed were still due by April 15, 2026. For HSA excess contributions, Publication 969 and the Form 8889 instructions use the phrase “due date, including extensions.” That is why the extension can matter for a return-of-excess deadline. In plain English:

Question	Practical answer
Does Form 4868 give more time to pay federal income tax?	No, not for most taxpayers
Can a valid extension give more time to file the return?	Yes, generally to October 15, 2026 for 2025 calendar-year returns
Can that extended filing date matter for returning HSA excess contributions?	Yes, because the HSA excess rule refers to the return due date including extensions
Does the HSA custodian automatically know you extended?	Usually no; you still need to request the correct transaction
Should you wait until October if you already know the excess exists?	Usually no; waiting creates paperwork risk

The best use of an extension is breathing room. It gives you time to get the HSA custodian transaction done correctly before filing. It gives your tax preparer time to put the returned amount in the right place.

It gives you time to avoid filing a return that you immediately need to amend. It does not remove the need to pay federal tax owed by April 15. It does not remove state tax questions.

It does not automatically prevent custodian form timing mismatches. It does not make an ineligible contribution eligible. It is a calendar tool. It is not a cleanup plan by itself.

What waits for next year

Some HSA items do not fit neatly into the return you are filing right now. That does not mean you ignore them. It means you label them correctly. Here are the main items that can wait for a later tax year or later form cycle:

Item	Why it may wait
Earnings on a returned excess	IRS materials say the earnings are included in income for the year the contribution and earnings are withdrawn
Form 1099-SA timing	The custodian may report an HSA distribution for the calendar year when the distribution occurred
Form 5498-SA timing	HSA contribution reporting can arrive after the filing deadline, so you should not wait for it if you already have the needed contribution records
Employer contributions made in 2026 for 2025	Publication 969 says those employer contributions can be reported on the 2026 Form W-2 while still being allocated to 2025
Prior-year excess absorption	A prior excess may be deductible in a later year only to the extent there is unused HSA contribution room
2026 payroll correction	A 2025 excess fix does not automatically adjust 2026 payroll elections
Last-month-rule testing period	If you fail a testing period in 2026, the income inclusion may belong on the 2026 return

The phrase “waits for next year” does not mean the issue disappears. The point is that some facts belong to the later year’s forms. If the custodian returns an excess in 2026, a later Form 1099-SA may show the distribution.

If an employer contributes in early 2026 for 2025, the IRS materials say it may be reported on the 2026 Form W-2. If you use unused 2026 HSA room to absorb a prior-year excess, your 2026 contributions have to leave enough space for that absorption. That is not the same as deleting the old excess. It is using a later year’s allowed room to reduce what remains subject to the recurring 6% problem.

When Form 5329 enters the picture

Form 5329 is where the HSA excess becomes more formal. The 2025 Instructions for Form 5329 say Part VII is for additional tax on excess contributions to HSAs. Line 47 is where the instructions discuss the excess of contributions to HSAs for 2025 over the Form 8889 contribution limit. The instructions also say withdrawn excess contributions and related earnings are included on Form 8889 lines 14a and 14b. Use the form logic like this:

If this is true	Form direction
You had HSA contributions or distributions	Form 8889 is generally part of the return
You returned the excess and earnings by the applicable deadline	Report the returned distribution as instructed; avoid treating the withdrawn excess as a deduction
Excess remains at year-end	Form 5329 Part VII may be needed to calculate the 6% tax
Prior-year excess carries into the current year	Form 5329 line 42 and line 43 logic may matter
You have no income tax return filing requirement but owe the extra tax	Form 5329 instructions describe filing Form 5329 by itself in some cases

The 6% tax is the part people remember. The carry-forward mechanics are the part people forget. Publication 969 says the 6% excise tax applies to each tax year the excess contribution remains in the account.

It also says you may be able to deduct excess contributions for previous years that are still in the HSA. The amount that can be deducted for the current year is limited by the unused current-year HSA contribution limit and the total excess at the beginning of the year. That means a prior-year excess can sometimes be absorbed by leaving room in a later year.

But if you keep maxing the HSA every year without accounting for the old excess, you may keep the 6% problem alive. That is how the same excess can keep creating a new form problem.

Three examples

These examples are simplified. They are not tax advice. They are here to show the timing.

Example 1: You catch the excess before filing

You prepared your 2025 return in April 2026. Form 8889 shows that your 2025 HSA contributions were $500 over your allowed 2025 limit. You have not filed yet.

You request a return of excess contribution from the HSA custodian. The custodian calculates the related earnings. You do not claim a deduction for the returned excess.

You include the HSA distribution correctly on Form 8889. You keep the confirmation. This is the cleanest lane. The main risk is using the wrong transaction type or filing before the custodian has processed the correction.

Example 2: You extended and have not filed yet

You requested a valid extension by April 15, 2026. You are still preparing the 2025 return. In June 2026, you notice that an employer contribution and your personal contribution together exceeded your 2025 HSA limit.

Because the HSA excess rule uses the return due date including extensions, the October 15, 2026 filing date may matter. You still need to contact the custodian promptly. You still need to withdraw the excess and related earnings correctly.

You still need to avoid claiming a deduction or exclusion for the returned excess. The extension gives time. It does not replace the custodian process, the IRS form instructions, or careful records.

Example 3: You already filed before noticing

You filed the 2025 return by April 15, 2026. In May 2026, you discover a 2025 HSA excess. This article is not mainly about the after-filing cleanup lane, because TAEK2 already has a separate post on that exact situation.

But the short version is this: IRS instructions for Form 8889 and Form 5329 describe a possible six-month correction route after a timely filed return, excluding extensions, with an amended return marked “Filed pursuant to section 301.9100-2.” That can point many calendar-year taxpayers toward an October 15, 2026 cleanup date.

Do not improvise this with a random withdrawal. Use the custodian process. Use the IRS form instructions. Use a tax professional if the return is already filed.

Mistakes TOP 7

1. Treating all 2026 deposits as 2026 contributions

A contribution made in 2026 can still be designated for 2025 if it is made by the applicable 2025 contribution deadline. Publication 969 says 2025 HSA contributions could be made through April 15, 2026. That means a January 2026 deposit is not automatically a 2026 contribution.

Check the custodian designation. Check the payroll designation. Check the tax software entry.

2. Forgetting employer money

Employer contributions count. Payroll contributions made through a cafeteria plan are generally treated as employer contributions for Form 8889 purposes. Your Form W-2 box 12 code W is a major clue.

If an employer contribution for 2025 is made in 2026, the IRS Form 8889 instructions include a worksheet line for that timing. Do not calculate the excess using only your personal bank transfers. That is how the math goes off the rails in a very official-looking way.

3. Waiting for Form 5498-SA before doing anything

Form 5498-SA can be useful. But waiting for a later contribution-information form is not always the right move if you already know the contribution facts. Publication 969 says to report HSA contributions on Form 8889 and include contributions made for 2025 from January 1, 2026 through April 15, 2026 that were designated for 2025. Use your custodian records, payroll records, W-2, and tax preparer. Do not let a later informational form become an excuse to miss a correction window.

4. Taking a normal distribution instead of a return of excess

The HSA custodian should have a return-of-excess process. Use that process. The tax result can depend on how the distribution is coded and reported.

If you simply withdraw money from the HSA, you may create a distribution record that does not match the correction you intended. That creates a later mismatch you may have to explain.

5. Ignoring the earnings

The IRS materials repeatedly mention income earned on the withdrawn excess contribution. The withdrawn excess is not the only number. Ask the custodian how it calculates the net income attributable to the excess. Keep the confirmation. Then report the earnings in the correct year as required.

6. Thinking the 6% tax is a one-time parking fee

Publication 969 says the excise tax applies for each tax year the excess remains in the account. That is the line that should get your attention. An old excess can keep creating a new-year problem. If you carry it forward, you need room in a later year’s HSA limit to absorb it. Otherwise you may keep paying for the same mistake.

7. Fixing 2025 but leaving 2026 payroll unchanged

If the excess happened because payroll was set too high, fix the current payroll election too. If the excess happened because Medicare started, fix the current payroll election too. If the excess happened because a spouse’s FSA made you ineligible, fix the current payroll election too. The 2025 return is not the only problem. The next paycheck may already be building the next problem.

Decision checklist before you file

Use this checklist before filing a 2025 federal return in 2026:

Confirm whether the contribution was for 2025 or 2026.
Add personal contributions, employer contributions, and payroll cafeteria-plan contributions.
Check Form W-2 box 12 code W.
Check whether any employer contribution for 2025 was made in 2026.
Recalculate your 2025 HSA limit using eligible months, HDHP coverage type, Medicare status, and catch-up eligibility.
Check whether any prior-year HSA excess is still in the account.
If there is an excess, ask the HSA custodian for a return-of-excess contribution process.
Ask whether the custodian will calculate earnings on the excess.
Do not claim a deduction for a withdrawn excess contribution.
Report HSA contributions and distributions on Form 8889.
Use Form 5329 Part VII if excess remains or prior-year excess tax applies.
Keep the custodian confirmation, payroll records, W-2, Form 8889, and Form 5329 with your tax records.
If you filed already, treat the case as an amended-return question, not a casual HSA withdrawal.

FAQ

Why would Form 1099-SA arrive next year if I removed a 2025 excess HSA contribution in 2026?

Form 1099-SA is tied to HSA distributions.

If the custodian returned the excess contribution in calendar year 2026, the custodian may report that 2026 distribution on a 2026 Form 1099-SA furnished in the next form cycle.

That does not mean the 2025 excess can be ignored on the 2025 return.

Use the custodian confirmation and IRS Form 8889/Form 5329 instructions for the 2025 return, then keep the later Form 1099-SA with your 2026 records.

Is an excess HSA contribution always fixed before April 15, 2026?

No.

April 15, 2026 was the main 2025 federal filing and payment deadline for most calendar-year individual taxpayers.

But HSA excess correction rules refer to the return due date including extensions.

If you requested a valid extension, the October 15, 2026 extended filing date may matter.

Special deadlines can also apply in disaster, combat-zone, international, or other cases.

If I filed Form 4868, did I also extend the time to pay tax?

No.

The IRS said an extension gives extra time to file, not extra time to pay.

For most taxpayers, federal income tax owed for the 2025 return was still due April 15, 2026.

The extension may still matter for filing and HSA return-of-excess timing.

Those are separate issues.

Do I need Form 8889 if I had HSA activity?

Generally yes.

The IRS instructions say Form 8889 is used to report HSA contributions, figure the HSA deduction, report HSA distributions, and calculate certain income or additional tax.

If you had HSA contributions or distributions, expect Form 8889 to be part of the return.

When does Form 5329 matter for HSA excess contributions?

Form 5329 matters when excess contributions remain or when prior-year HSA excess tax carries into the current year.

The 2025 Form 5329 instructions use Part VII for additional tax on excess HSA contributions.

Line 47 addresses current-year HSA excess contributions.

Does the 6% excise tax apply once or every year?

Publication 969 says the 6% excise tax generally applies to each tax year the excess contribution remains in the HSA.

That means the problem can repeat if the excess stays in the account.

You either need a proper return of excess, a proper carry-forward absorption plan, or professional cleanup.

Are earnings on the returned excess taxable?

IRS HSA materials say income earned on withdrawn excess contributions is included in Other income for the year the contribution and earnings are withdrawn.

Ask the custodian how it calculates the earnings.

Keep the confirmation because the distribution reporting may show up in a later form cycle.

Can I use 2026 HSA contribution room to fix a 2025 excess?

Sometimes a prior-year excess can be absorbed by unused HSA contribution room in a later year.

Publication 969 describes deducting excess contributions for previous years that remain in the HSA, limited by unused current-year contribution room and the excess at the beginning of the year.

But if you also max your 2026 HSA, there may be no unused room.

This is a place to slow down and calculate.

What if my employer made the excess contribution?

Employer excess contributions can be more complicated.

The Form 8889 instructions distinguish excess employer contributions and discuss when excess employer contributions may need to be reported as Other income.

Contact payroll or benefits, contact the HSA custodian, and consider a tax professional if the employer is correcting wages or W-2 reporting.

What if I already filed my 2025 return?

Then you are in the after-filing cleanup lane.

IRS instructions describe a possible amended-return route in some timely filed cases.

Because the return is already filed, do not casually withdraw the money and hope it lines up.

Read the related TAEK2 after-filing HSA article below and use a tax professional if the amount or forms are messy.

Excess HSA contribution removed in 2026: why your 1099-SA may arrive next year