Tax debt and divorce: who's responsible for joint returns?

Signing a joint return makes both spouses "jointly and severally" liable for the tax, penalties and interest on it. That means the IRS can collect the full amount from either person — not half from each. It stays true after separation or divorce. IRS Publication 504 states this plainly, and it's the single most common surprise for divorced taxpayers who discover a levy or refund offset years later.

Family courts can order one spouse to pay a joint tax debt, but the IRS isn't a party to the divorce. If your ex doesn't pay, the IRS can still pursue you. Your remedy is through the divorce court — for example, enforcing the decree against your ex — not through the IRS. That's why it's worth resolving known tax balances before the divorce is final, or building protections like indemnity clauses into the settlement.

The IRS offers three types of relief, requested on Form 8857: The first two generally must be requested within two years of the IRS's first collection activity against you. See our innocent spouse relief guide.

• Innocent spouse relief — for understated tax caused by your spouse's erroneous items that you didn't know about and had no reason to know about.
• Separation of liability — for divorced, widowed or separated filers, allocating an understatement between you as if you'd filed separately.
• Equitable relief — the only type that can cover an underpayment (tax correctly reported but not paid), when holding you liable would be unfair.

Injured spouse is different from innocent spouse. If you file a joint return now and your share of the refund is taken for debts that belong only to your spouse — past-due child support, a student loan or a separate prior tax debt — Form 8379 can recover your portion. See injured spouse allocation.

Your filing status depends on your marital status on December 31. If you're still married, you can choose married filing separately to avoid joint liability for the new year, though it often costs more tax. Some separated parents qualify as head of household if they lived apart from their spouse for the last six months of the year and paid more than half the cost of keeping up a home for a qualifying child. Publication 504 covers these rules, plus alimony and property transfers.

If you end up owing a joint balance, the usual options apply: an installment agreement, Currently Not Collectible status, or an Offer in Compromise based on your finances. Former spouses can arrange separate plans on the same joint liability. The IRS applies each payment to the joint balance, so a payment by either reduces what both owe.

Ask whether every joint return was filed and paid, whether any audit is open, and whether either spouse had self-employment income without estimated payments. Look at who will claim children, who gets the mortgage interest deduction for the final joint year, and how retirement accounts are divided — a qualified domestic relations order avoids tax on the transfer itself. Large refunds or balances from the final joint year should be addressed in writing.

1. Pull your IRS account transcripts for every joint year to see what's owed.
2. Tell your divorce attorney about any balance before the settlement is signed.
3. File separately for the current year if you're concerned about your spouse's reporting.
4. Request relief on Form 8857 promptly if you believe the debt isn't fairly yours.