Form 1099-SA: what it reports, what the box 3 codes mean, and whether it affects your taxes

An employee forwards a tax form to HR with one question: do I owe money on this? It says 1099-SA, it came from a financial institution nobody in the team has heard of, and the figure in box 1 looks uncomfortably like income.

It is worth saying plainly at the start: Form 1099-SA is American. It belongs to the United States federal tax system, it is issued under Internal Revenue Service rules, and there is no British version of it. This article covers what the form reports, who sends it, the six codes in box 3, why receiving one is not the same as owing tax, where to get a replacement, and an employer's real role. A separate section at the end gives a British reader the short answer.

The trouble is rarely the form. It is that nobody wrote down which job belongs to HR and which to the account custodian. See how New Dynamics workflows put a named owner against each step, so the question is answered once rather than every January.

This is general information about United States tax reporting, not legal or tax advice. Every figure, code and date below is quoted from an IRS page with the year or revision it belongs to, and they change. Check your own return with a tax professional.

What Form 1099-SA reports, and who sends it

Jurisdiction: United States. Form 1099-SA is an information return: it reports a payment rather than calculating anybody's tax. Its title, on the IRS About Form 1099-SA page, is "Distributions From an HSA, Archer MSA, or Medicare Advantage MSA", and the page gives its purpose in one sentence: "File Form 1099-SA to report distributions made from a: Health savings account (HSA). Archer Medical Savings Account (Archer MSA). Medicare Advantage Medical Savings Account (MA MSA)."

So the meaning of a 1099-SA is simple: money that came out of a tax-favoured medical savings account during the calendar year. Two details answer a lot of confused emails. The payment may have gone "directly to a medical service provider or to the account holder", and "A separate return must be filed for each plan type."

The point people get wrong is who sends it. The Instructions for Forms 1099-SA and 5498-SA, revised 12/2026, are addressed to the trustee or custodian of the account, not to an employer. IRS Publication 969, for use in preparing 2025 returns, puts it from the holder's side: "The trustee will report any distribution to you and the IRS on Form 1099-SA." The employer is not the filer. The institution holding the account is.

The due dates sit in the IRS General Instructions for Certain Information Returns (2025), whose Guide to Information Returns gives Form 1099-SA a recipient date of "January 31" and an IRS date of "February 28*", with the footnote "The due date is March 31 if filed electronically." A date falling on "a Saturday, Sunday, or legal holiday" moves to the next business day.

Which accounts a 1099-SA can come from

Jurisdiction: United States. Three account types share the form, and box 5 says which. All three are described in Publication 969 (2025).

A health savings account is "a tax-exempt trust or custodial account you set up with a qualified HSA trustee to pay or reimburse certain medical expenses you incur". It belongs to the individual rather than the employer: "An HSA is 'portable.' It stays with you if you change employers or leave the work force."

An Archer medical savings account is the older cousin, built for "self-employed individuals and employees of certain small employers" and closed to new entrants since 2007.

A Medicare Advantage MSA is "an Archer MSA designated by Medicare to be used solely to pay the qualified medical expenses of the account holder who is enrolled in Medicare". "Contributions can be made only by Medicare."

There is no Form 1099-HSA. Anybody looking for a 1099 for their health savings account wants Form 1099-SA with the HSA box ticked: "Check the box to indicate if this distribution was from an HSA, Archer MSA, or MA MSA."

The box 3 distribution codes, and what each one means

Jurisdiction: United States. Box 3 carries one digit explaining why the money left the account. The instructions revised 12/2026 list six codes, in their wording below.

1. Normal distributions. "Use this code for normal distributions to the account holder and any direct payments to a medical service provider. Use this code if no other code applies."
2. Excess contributions. "Use this code for distributions of excess HSA or Archer MSA contributions to the account holder."
3. Disability. "Use this code if you made distributions after the account holder was disabled (see section 72(m)(7))."
4. Death distribution other than code 6. "Use this code for payments to a decedent's estate in the year of death. Also use this code for payments to an estate after the year of death. Don't use with code 6."
5. Prohibited transaction. The instructions give only a cross-reference: "See sections 220(e)(2) and 223(e)(2)."
6. Death distribution after year of death to a nonspouse beneficiary. "Use this code for payments to a decedent's nonspouse beneficiary, other than an estate, after the year of death. Don't use with code 4."

Code 1 is the common one, and it says nothing about whether the money was spent on qualified care: the custodian pays out when asked and does not audit receipts. The codes describe the withdrawal, not the tax outcome.

The other boxes are quicker. Box 1 is the gross distribution, and the instructions add the line that should calm most readers down: "You are not required to determine the taxable amount of a distribution." Box 2 holds earnings on returned excess contributions, box 4 the value "of the account on the date of death".

Does a 1099-SA affect my taxes?

Jurisdiction: United States. Yes, in the sense that it has to be reported. No, in the sense most people fear, which is that the amount in box 1 is extra income.

Publication 969 (2025) states the position in almost identical words for each account type. For a health savings account: "Distributions from an HSA that are used to pay qualified medical expenses aren't taxed." The Archer MSA and MA MSA sentences differ only in the name of the account.

The other half of the rule follows a few paragraphs later: "You can receive tax-free distributions from your HSA to pay or be reimbursed for qualified medical expenses you incur after you establish the HSA. If you receive distributions for other reasons, the amount you withdraw will be subject to income tax and may be subject to an additional 20% tax." That additional tax is not universal: "There is no additional tax on distributions made after the date you are disabled, reach age 65, or die."

What counts as qualified is defined rather than left to judgement. Publication 969 says it means amounts paid "for 'medical care' (as defined in Code section 213(d))" for the holder, their spouse and their dependants, "but only to the extent the amounts are not compensated for by insurance or otherwise". There is a timing trap too: "expenses incurred before you establish your HSA aren't qualified medical expenses."

Reporting takes the same fork. Use a distribution for qualified medical expenses and "you don't pay tax on the distribution but you have to report the distribution on Form 8889". If you do not, "you must pay tax on the distribution."

The answer for one distribution turns on facts an HR team does not hold. Point the person at the current IRS instructions and a tax professional. This is general information and not tax advice.

Form 5498-SA, Form 8889 and Form 8853

Jurisdiction: United States. Three companion forms sit around the 1099-SA, each with its own job.

Form 5498-SA reports money in. The IRS About Form 5498-SA page tells the "trustee or custodian" to "file Form 5498-SA for each person for whom you maintained an HSA, Archer MSA, or MA MSA". It carries contributions, rollovers and, in box 5, "the FMV of the account on December 31 of the calendar year". It runs later than the 1099-SA, which is why it often arrives after a return has been filed: the participant's statement is due "by May 31 of the subsequent year".

Form 8889 is where the account holder does the arithmetic. The IRS About Form 8889 page lists its purposes as reporting HSA contributions, figuring the deduction and reporting distributions. Publication 969 makes it hard to skip: "You must file Form 8889 ... if you (or your spouse, if married filing jointly) had any activity in your HSA during the year."

Form 8853 covers the MSAs. The IRS About Form 8853 page titles it "Archer MSAs and Long-Term Care Insurance Contracts" and lists among its uses "Report distributions from Archer MSAs or Medicare Advantage MSAs". So box 5 decides which return form the distribution lands on. Between them the three say what came out, what went in and how the two reconcile.

Where to get your 1099-SA, and how to get a replacement

Jurisdiction: United States. The form comes from the trustee or custodian holding the account, so the first request goes to them, not to payroll. The recipient copy is due by 31 January under the 2025 General Instructions, and a copy that looks like a plain printout is not necessarily wrong: the instructions revised 12/2026 say "these forms have been converted to an online fillable format".

If the statement has not arrived, there are three honest answers.

1. Ask the custodian. They are the filer, they hold the records, and reissuing a statement is their job. Many publish it in the account portal before the post arrives.
2. Check the account, not the plan. Where somebody has changed employer or holds more than one account, the statement follows the account, which is how two forms arrive for one person.
3. Use an IRS transcript to see what was filed. The IRS page on transcript types and ways to order them, last reviewed on 10 March 2026, says the "Wage and income transcript - shows data from information returns we receive such as Forms W-2, 1098, 1099, and 5498", covering "the current and nine prior tax years".

Corrections run through the custodian too: they must "Correct any filed Form 1099-SA with the IRS and the account beneficiary as soon as you become aware of the error." What an employer cannot do is produce the form. HR never filed it, so it has no copy to reissue, and what it can offer is the name of the account provider from the benefits record, with no comment on anybody's tax position.

What an employer's role actually is

Jurisdiction: United States. The employer's part in this is contributions and the W-2, not the 1099-SA.

Publication 969 (2025) starts with the health plan: "If you want your employees to be able to have HSAs, they must have an HDHP." The employer may then contribute, and a salary reduction through a cafeteria plan counts as employer money: contributions "using the amount of an employee's salary reduction through a cafeteria plan are treated as employer contributions."

The duty that follows is a payroll one. "Amounts you contribute to your employees' HSAs aren't generally subject to employment taxes. You must report the contributions (including amounts the employee elected to contribute through a cafeteria plan) on Form W-2, box 12, code W." For an Archer MSA the publication points to a different code: contributions "should be shown on Form W-2, box 12, code R."

There is a fairness rule too. An employer that contributes "must make comparable contributions to all comparable participating employees' HSAs", on pain of "an excise tax of 35% of the amount you contributed", although "The comparability rules don't apply to contributions made through a cafeteria plan."

So the employer owns the plan, the election and a box on the W-2. The custodian owns the account, the distributions and the 1099-SA, and writing that boundary down tells an employee who to ring. The cafeteria plan carrying the election is the same container a health FSA sits in; our post on the flexible spending account sets the FSA and the HSA side by side, so that comparison is not repeated here. For the wider family of American information returns, see our post on IRS information returns.

An employer's obligations depend on its own plan documents, and this is general information, not legal or tax advice.

For a British reader: there is no UK 1099-SA

Jurisdiction: United Kingdom. The honest answer first: there is no UK equivalent of Form 1099-SA, and none for the account behind it either. The reason is the National Health Service.

A health savings account exists because an American household meets much of its own medical cost in cash, even when insured. The NHS Constitution for England describes a different arrangement. Its first principle is that "The NHS provides a comprehensive service, available to all", and its second is that "Access to NHS services is based on clinical need, not an individual's ability to pay", adding that "NHS services are free of charge, except in limited circumstances sanctioned by Parliament."

Two things follow. There is no large pool of out-of-pocket treatment cost for such an account to reimburse, so the account type never developed here. And with no account, there is no custodian owing anybody an annual statement of what they withdrew. The reporting that does exist runs the other way round: where a UK employer provides health cover, GOV.UK's guidance on medical or dental treatment and insurance states that "As an employer providing medical or dental treatment or insurance to your employees, you have certain tax, National Insurance and reporting obligations". The custodian tells the IRS what came out of the account; here the employer tells HMRC what it provided.

For the UK mechanisms people reach for instead, including salary sacrifice, see the flexible spending account post and our employee benefits guide. None of this is legal or tax advice, and UK employers should check the current GOV.UK page before changing a benefit.

Frequently asked questions

What is a 1099-SA form used for?

It reports money taken out of a United States tax-favoured medical savings account during the calendar year. The IRS says to "File Form 1099-SA to report distributions made from a: Health savings account (HSA). Archer Medical Savings Account (Archer MSA). Medicare Advantage Medical Savings Account (MA MSA)". The trustee or custodian files it, not the employer. This is general information and not tax advice, so check your own return with a tax professional.

Does a 1099-SA affect my taxes?

Receiving one does not by itself create a tax bill, but it does have to be reported. IRS Publication 969, for use in preparing 2025 returns, says "Distributions from an HSA that are used to pay qualified medical expenses aren't taxed", while a distribution taken for other reasons is "subject to income tax and may be subject to an additional 20% tax". The custodian is "not required to determine the taxable amount of a distribution", so box 1 is a gross figure, and the taxable part is worked out on Form 8889 for an HSA or Form 8853 for an MSA. Ask a tax professional about your own case.

Is there a Form 1099-HSA?

No. There is no separate 1099 for a health savings account. The form is Form 1099-SA, titled "Distributions From an HSA, Archer MSA, or Medicare Advantage MSA", and box 5 says which of the three it was. Contributions go on a different form, Form 5498-SA.

Where do I get my 1099-SA?

From the trustee or custodian that holds the account, usually in the account portal or by post, with the recipient copy due by 31 January under the IRS General Instructions for Certain Information Returns (2025). Ask the custodian for a replacement, because they are the filer and the employer never had a copy. To see what was filed, the IRS says a "Wage and income transcript - shows data from information returns we receive such as Forms W-2, 1098, 1099, and 5498", available for "the current and nine prior tax years".

What do the box 3 distribution codes on a 1099-SA mean?

Box 3 carries one digit explaining why the money left the account. In the IRS instructions revised 12/2026 the six codes are: 1, "Normal distributions"; 2, "Excess contributions"; 3, "Disability"; 4, "Death distribution other than code 6"; 5, "Prohibited transaction"; and 6, "Death distribution after year of death to a nonspouse beneficiary". None says whether the distribution was taxable.

Your next step: fix the boundary, not the form

1. Write down who owns what. The custodian files Form 1099-SA and Form 5498-SA. The employer offers the plan, funds the contribution and reports it on the W-2.
2. Tell employees where the form comes from at the point they elect, not in January. Naming the provider in the benefits record saves a round of forwarded emails.
3. Keep HR out of the tax answer. Point people at the IRS instructions and a tax professional. Whether a distribution was qualified depends on receipts nobody in HR has seen.
4. Check figures at the publisher each year. The codes are stable, the limits are not.
5. If you operate in both countries, keep the two systems apart in writing. A UK manager reading an American benefits pack is where the confusion starts.

For a way of setting pay and benefits you can explain to the person affected, read and download our compensation policy guide. The guide is free to read, and the PDF uses our short download form.

Want every annual benefits task to have an owner, a deadline and a visible status? Book a New Dynamics demo and bring your benefits calendar, or email contact@new-dynamics.com.