When a marriage ends, dividing the house, the retirement accounts, and the custody schedule usually gets the most attention. Tax debt often gets treated as an afterthought — noted in the settlement agreement with a line or two and assumed to be “handled.” That assumption can be expensive. The IRS is not a party to the divorce decree, and it does not consider itself bound by whatever the decree says about who owes what.

For family law attorneys, understanding how the IRS actually treats tax debt after divorce — and where a settlement agreement can and cannot protect a client — is essential to negotiating a settlement that holds up once the ink is dry.

Joint and Several Liability: The Rule That Doesn’t Go Away

Couples who file a joint tax return are jointly and severally liable for the full amount of tax, penalties, and interest on that return — not just their proportional share. This liability attaches at the time the joint return is filed and survives divorce. It does not matter whose income generated the liability, who prepared the return, or who benefited from the underreporting or unpaid tax.

This means the IRS can pursue either former spouse for 100% of a joint tax debt, regardless of what the divorce decree says. If one spouse ran a business that generated a large tax bill and the decree assigns that debt to them, the IRS can still collect from the other spouse’s wages, bank accounts, or refunds if the assigned spouse does not pay.

Key point for settlement drafting: a divorce decree allocates responsibility between the spouses. It does not bind the IRS. If the assigned spouse defaults, the other spouse is still on the hook to the government — and their only recourse is to go back to family court to enforce the decree, which is often slow and unsatisfying when the other spouse has no assets left to collect from.

What a Divorce Decree Can and Cannot Do

A well-drafted settlement agreement can allocate tax debt between the parties as a matter of contract law between the spouses. This is worth doing even though it doesn’t bind the IRS, because it gives the disadvantaged spouse a legal claim for reimbursement or indemnification if the IRS comes after them for a debt the decree assigned to the other party.

What the decree CAN do:

• Allocate responsibility for specific tax years or specific liabilities between the spouses
• Create an indemnification obligation, so the responsible spouse must reimburse the other for any amount the IRS collects from them
• Require the responsible spouse to provide proof of timely filing and payment going forward
• Establish consequences (contempt, offset against other settlement assets) if the responsible spouse fails to pay

What the decree CANNOT do:

• Prevent the IRS from collecting from either spouse on a joint liability
• Discharge either spouse’s underlying obligation to the IRS
• Override an existing IRS lien or levy
• Substitute for innocent spouse relief, which must be requested directly from the IRS

Strategies for Allocating Tax Debt in the Settlement

Because the decree only governs the relationship between the spouses, the strongest settlements pair a clear allocation with practical protections. A few approaches that come up frequently:

1. Offset against other assets

Rather than relying on a promise to pay future tax debt, some settlements offset the liability against the marital estate immediately — for example, awarding a larger share of home equity or retirement assets to the spouse who is not responsible for the tax debt, effectively pre-paying the indemnification.

2. Escrow or holdback arrangements

When the tax liability is known but not yet resolved with the IRS (for example, an open audit or unfiled return), some agreements hold a portion of settlement proceeds in escrow until the liability is quantified and paid.

3. Requiring proof of resolution before final decree

Where possible, resolving or at least formally addressing outstanding tax debt with the IRS before the divorce is finalized reduces the risk of a client being blindsided years later by a levy tied to a liability they thought was someone else’s problem.

4. Coordinating with a tax professional early

Family law attorneys are not expected to be tax attorneys, and trying to estimate a client’s real exposure without professional input is a common way settlements go wrong. Bringing in a tax resolution specialist to review filed and unfiled returns, run an account transcript request, and flag any existing IRS balances before the settlement is finalized can prevent a client from being surprised post-divorce.

When the IRS Comes Knocking After the Divorce Is Final

If a former spouse is contacted by the IRS about a joint liability the decree assigned to the other party, they generally have a few paths forward, depending on the facts:

• Innocent Spouse Relief — if they did not know, and had no reason to know, about the understatement of tax when the return was signed
• Separation of Liability — allocating the deficiency between spouses based on who was responsible for the item that created it, generally available to divorced or legally separated taxpayers
• Equitable Relief — a broader, facts-and-circumstances option when the first two don’t apply, including for underpaid (as opposed to understated) tax
• Enforcement of the divorce decree’s indemnification clause in family court, to recover amounts paid from the responsible former spouse

These are IRS-specific remedies and require a separate filing (Form 8857) directly with the IRS — the divorce decree is evidence that can support the request but is not a substitute for it. We cover this process in detail in our companion guide.

The Takeaway for Family Law Practices

Tax debt doesn’t disappear at the courthouse, and a settlement agreement that treats it as a simple line-item split can leave a client exposed for years. The most protective settlements combine a clear, well-drafted allocation between the spouses with an honest accounting of what the IRS actually knows about — and, where debt already exists, a plan for resolving it rather than just assigning it on paper.

Clients navigating tax debt during or after a divorce benefit from having a tax resolution specialist review the situation alongside their family law attorney, well before the settlement is signed.