A joint return makes one debt belong to both of you

Figures relate to tax year 2025-26 (UK) · 2025 (US)

A joint return is one return signed by two people. That signature makes the entire liability joint and several.

So the IRS can pursue either of you for all of it. Not half each, and not in proportion to who earned what.

Innocent spouse relief exists to undo that in the right circumstances. However, it has a short clock and it tells your former partner you have asked.

Key takeaways

• A joint return makes each spouse liable for the whole amount.
• Innocent spouse relief can remove that liability from one of you.
• There are three separate routes, with different conditions.
• You claim on Form 8857, which covers all three.
• Two of the innocent spouse routes carry a two year deadline.
• The other spouse is always notified that you have claimed.
• Living abroad does not change your eligibility.
• Divorce alone does not undo a joint tax liability.

What does joint and several mean?

That each of you owes the entire amount rather than a share of it. According to IRS guidance on joint filing, both signatories carry the tax, interest and penalties on that return. So the IRS can collect everything from whichever spouse is easier to reach, and in a cross-border marriage that is usually whoever still has American assets or an American address.

The split between you stays a private matter, and the IRS neither recognises nor enforces it.

That remains true however fairly you divided things between yourselves at the time.

What is innocent spouse relief?

A way of removing joint liability from a spouse who should not fairly carry it. It applies where one partner understated income or claimed something improper while the other had no reason to know. The relief lifts the debt from the innocent partner and leaves it with the one who created it, which is the outcome most people assume the law already produces.

It depends on discretion rather than entitlement, so the facts and the presentation both matter a great deal.

Nobody wins innocent spouse relief simply for having ignored the household finances.

What are the three routes?

Traditional relief, separation of liability, and equitable relief. The first covers an understatement you did not know about. The second splits the liability between you as though you had filed separately, and opens up once you divorce or separate. The third is the catch-all for cases the first two do not reach but where collection would still be unfair.

One innocent spouse application covers all three, and the IRS considers each in turn rather than making you choose.

So a claim that fails on the first route can still succeed on the third.

What is the two year deadline?

A clock running from the first collection activity aimed at you, which is usually a notice demanding payment. You have to claim traditional relief and separation of liability within that window. Equitable relief allows more time, which is why late claims so often rest on it rather than on the other two.

The clock starts from the collection action rather than from the original return or the divorce.

Diarise it from the day the first demand arrives at your address.

Does your spouse find out?

Yes, always, and this is not negotiable. The IRS must write to the other spouse and let them take part, because innocent spouse relief shifts the liability onto them. There is no confidential route, which matters enormously where there has been abuse or where contact is unsafe.

The IRS protects your address, but not the fact of the claim or its substance.

Raise any safety concern with your adviser before you file anything.

A worked example

Take an illustrative example. An American in Leeds filed jointly with her former husband for several years while he ran a business she had no involvement in.

He understated the business income substantially. They divorced in 2022 and he returned to the States.

In 2025 a demand for $68,000 arrives at her British address, because she is the spouse the IRS can locate.

She claims within two years of that demand, shows she had no knowledge of the business figures and no benefit from them, and the liability moves back to him.

Three routes, three tests

What does knowledge mean here?

Whether you knew or had reason to know, which is a wider test than simple awareness. Signing a return you never read is no defence by itself, and the IRS weighs your education, your involvement in the finances and whether the lifestyle matched the declared income. Deliberate incuriosity rarely wins the argument.

What helps is evidence that your partner genuinely kept the information from you at the time.

Bank statements you never saw, and accounts in one name alone, both support that picture.

Does it cover unpaid tax as well?

Only through the equitable route. Where the return was correct but nobody paid the tax, that counts as an underpayment rather than an understatement, and the first two routes do not reach it. Equitable relief can still apply, and in practice this is one of its commonest uses.

So a correct return with an unpaid balance is not outside the system altogether.

The question becomes fairness rather than knowledge of a hidden figure.

Does divorce deal with it?

Not by itself, and this is the most common misunderstanding we meet. A divorce settlement allocating the tax debt to one spouse binds the two of you and does nothing to the IRS. They can still collect from whichever of you they choose, leaving you to pursue your former partner privately.

Our guide to divorce across the two systems covers the wider separation.

A court order is worth having, but it shields nobody from collection.

How do you actually claim?

On Form 8857, with a narrative explaining your circumstances. You set out what you knew, when you knew it, and why collecting from you would be unfair. The form is short and the supporting statement decides the outcome, so the writing matters more than the boxes.

Attach anything that evidences the separation of your finances at the relevant time.

Vague assertions without documents rarely carry a claim on their own.

Does living in Britain change anything?

Not your eligibility, though it changes the practicalities considerably. The tests stay the same wherever you live, but post travels slower, telephone access is harder, and the first demand may reach an old American address long before it reaches you. That delay can eat into the two year window without you knowing.

Our guide to the IRS online account from the UK covers keeping your address current.

An out of date address is how expats lose this relief entirely.

What if your spouse is not American?

Then the position depends on whether you elected to treat them as a US taxpayer. Many couples make that election in order to file jointly, which pulls a non-American spouse into the American system and makes them jointly liable. Innocent spouse relief still applies, though the election created the exposure in the first place.

Our guide to a non-resident alien spouse covers the election.

Understanding that choice before making it prevents most of these cases.

Is filing separately safer?

It removes the joint liability entirely, which is a real benefit, though it usually costs more tax. Separate filing loses certain credits and uses harsher brackets, so most couples file jointly and accept the exposure. For a couple with complicated or opaque finances, that calculation can run the other way.

Our guide to streamlined filing for married couples covers joint catch-ups.

The safer filing status deserves pricing rather than dismissal.

What if there was abuse?

That matters directly, and the IRS must take it into account. Abuse or financial control can explain why you signed without understanding, and it weighs heavily in the equitable analysis of an innocent spouse claim. Evidence helps, though a lack of documents does not end the argument.

Tell your adviser early, because it changes how the whole claim should be framed and filed.

You can also ask for protective measures around your address and contact details.

How long does a claim take?

Six months is common and a year is not unusual, particularly from abroad. The IRS has to contact the other spouse, weigh their response and then decide, which takes time even in straightforward cases. Collection carries on in the meantime unless the IRS formally suspends it.

Our guide to IRS payment plans from abroad covers managing the debt while you wait.

Ask about suspending collection rather than assuming it pauses automatically.

Can you appeal a refusal?

Yes, and the appeal rights here are genuinely useful. You can take a refusal to the Tax Court, and that route exists specifically for innocent spouse cases. Plenty of claims that fail at the first stage succeed later with better evidence or a clearer narrative.

The petition deadline is strict, so note it the day a refusal arrives.

Do not treat a first refusal as the end of the matter.

Does it affect the passport rules?

It helps considerably, because a pending innocent spouse claim is one of the exceptions to the overdue debt programme. So a genuine claim protects your passport while the IRS considers it. That matters most for somebody living here whose passport underpins their right to remain.

Our guide to passport certification for tax debt covers the programme.

That protection lasts only while the claim stays pending.

What about refunds you already received?

Innocent spouse relief generally removes a liability rather than returning money you already paid. The equitable route allows some refunds, though the rules are narrow and the amounts small. Most successful claims stop future collection rather than recovering past payments outright.

So claiming early is worth far more than claiming thoroughly but late.

Money the IRS already collected is the hardest part to recover.

Does HMRC have an equivalent?

No, because Britain does not have joint returns at all. Each spouse files on their own income and carries their own liability, so the problem never arises here. Americans in Britain often find this the most surprising structural difference between the two systems.

Our guide to registering for Self Assessment covers the British return.

One system creates the exposure and the other never could.

What records should you gather?

Bank statements showing separate finances, the divorce documents, any correspondence about the return, and evidence of what you were told at the time. Those four build the picture of what you knew and when you knew it. Gather them before you file rather than scrambling when questions arrive.

In our practice the cases that succeed are the ones with contemporaneous documents.

Memory alone is a weak foundation several years after the event.

Should an adviser handle it?

Usually, because the narrative is the claim and it repays careful framing. An adviser also needs authority on record before discussing anything with the IRS, and that takes weeks to process. Starting that authority early is the single most useful first step.

Our guide to Form 2848 and IRS authority covers the paperwork.

File that authority before the innocent spouse claim, not alongside it.

Can you claim innocent spouse relief more than once?

Yes, across different years, because each return stands on its own. A marriage that produced several problem years may need a claim covering each of them, and the facts can differ from year to year as your knowledge and involvement changed. One application can cover several years where the circumstances were similar throughout.

So list every year the demand covers rather than only the largest one.

A year left out of the claim stays firmly your liability.

What if the other spouse has disappeared?

The claim still proceeds, because the IRS only has to attempt notification rather than succeed at it. A former partner who has moved, remarried or gone abroad does not block your application, and their silence is not treated as agreement or objection either way. The decision still turns on your own facts.

So you do not need their cooperation, their address or their consent to claim.

That matters where the marriage ended badly and contact stopped years ago.

Does the amount owed affect your chances?

Not directly, though it changes how closely the IRS looks. A modest balance tends to move faster and attract less scrutiny, while a large one invites questions about whether you benefited from the money. The test remains fairness and knowledge rather than any threshold figure.

So a six figure debt is not hopeless, and a small one is not automatic.

What shifts the outcome is the evidence rather than the size of the number.

How to claim innocent spouse relief

1. Find the date of the first collection notice addressed to you.
2. Work out which of the three innocent spouse routes your facts fit best.
3. Gather bank records, divorce papers and any contemporaneous correspondence.
4. File Form 8857 with a full written narrative attached.
5. Expect the IRS to notify your former spouse of the claim.
6. Ask whether collection can be suspended while it is considered.
7. Keep your address current so decisions actually reach you.
8. Appeal to the Tax Court promptly if the claim is refused.

Mistakes and penalties we see with innocent spouse claims

The first is assuming a divorce settlement binds the IRS, when it only binds the two of you.

The second is missing the two year window because the first notice went to an old American address.

The third is filing the form with no narrative, when the narrative is what actually decides it.

The fourth is giving up after a first refusal, when the appeal route exists precisely for these cases.

How US UK Tax Accountants helps

We work out which route fits and, just as importantly, when the clock started, because an expat often learns about the debt long after the first demand was issued.

Then we build the narrative with documents behind it. Our US federal returns service covers the filings underneath.

If a demand has arrived for tax your former partner created, get in touch before the two years run.

Last reviewed 23 October 2026. This article is general information and not personal tax advice, and these claims turn entirely on individual facts.