Innocent Spouse Relief: How to Remove Tax Liability from a Joint Return

By Yarik Yarosh, CPA ·September 5, 2026 ·4 min read

Written by Yarik Yarosh, CPA (US & Canada) September 5, 2026 · FL CPA license AC61704 · CPA Ontario

When married taxpayers file a joint return, both spouses are jointly and severally liable for the entire tax liability on that return. This means the IRS can collect the full amount from either spouse, regardless of who earned the income or who made the error. For spouses who were unaware of their partner’s unreported income, inflated deductions, or fraudulent positions, this creates an enormous financial exposure. IRC 6015 provides three types of relief.

✓Key takeaway

Innocent spouse relief options (IRC 6015):

1. Innocent spouse relief (IRC 6015(b)):

Requirements: (a) there is an understatement of tax attributable to erroneous items of the other spouse, (b) the requesting spouse did not know and had no reason to know of the understatement at the time they signed the return, and (c) it would be inequitable to hold the requesting spouse liable.
Relief: the requesting spouse is relieved of liability for the understatement, including tax, interest, and penalties attributable to the other spouse’s erroneous items.
Deadline: must be filed within 2 years of the date the IRS first began collection activity (Notice CP504 or the first levy action).

2. Separation of liability (IRC 6015(c)):

Requirements: the requesting spouse is no longer married to (or is legally separated from) the other spouse, OR has not been a member of the same household as the other spouse during the 12 months prior to the request.
How it works: the understatement is allocated between the two spouses as if they had filed separate returns. Each spouse is liable only for their allocated portion.
Limitation: relief is not available if the requesting spouse had actual knowledge of the erroneous item (burden of proof on the IRS).

3. Equitable relief (IRC 6015(f)):

This is the catch-all provision. Available when the requesting spouse does not qualify for relief under (b) or (c) but it would be inequitable to hold them liable.
Available for both understatements (unreported income) AND underpayments (the return was correct but the tax was not paid).
The IRS considers factors including: marital status, economic hardship, knowledge or reason to know, legal obligation (divorce decree assigns liability to the other spouse), significant benefit (did the requesting spouse benefit from the understatement?), compliance history, and mental or physical health.
Rev. Proc. 2013-34 provides a streamlined determination for certain cases.

Filing for relief:

Form 8857 (Request for Innocent Spouse Relief)
The IRS notifies the other spouse and allows them to participate in the determination
If denied, the requesting spouse can petition the Tax Court within 90 days

How does innocent spouse relief work in a common scenario?

Hypothetical example

Round numbers. For current guidance, see IRS innocent spouse relief. A married couple filed jointly for 5 years. The husband operated a cash-intensive auto repair business. The wife was a teacher earning $55,000/year. They divorced in 2024.

In 2025, the IRS audits the 2022 and 2023 joint returns. The audit finds:

2022: husband underreported business income by $60,000 (cash not deposited)
2023: husband claimed $25,000 in fictitious deductions
Additional tax owed: $30,000 (including penalties and interest)

The wife (now ex-wife) receives a Notice CP504 for the full $30,000.

Step 1: File Form 8857 (within 2 years of the CP504).

Analysis of each relief type:

IRC 6015(b) (innocent spouse):

Was there an understatement? Yes ($85,000 total).
Attributable to the other spouse? Yes (his business income, his deductions).
Did the wife know or have reason to know? She did not handle the business finances. She did not prepare the returns. She signed the returns relying on the CPA’s preparation. She had no access to the business bank accounts.
Inequitable to hold her liable? She received no benefit from the unreported income (no lavish spending, no assets in her name from the cash).
Likely outcome: GRANTED for the understatement attributable to the husband’s erroneous items.

IRC 6015(c) (separation of liability):

Available because they are divorced.
Allocation: the unreported $60,000 in business income and $25,000 in fictitious deductions are 100% allocated to the husband (these were his sole proprietorship items).
The wife’s liability: $0 on the allocated items.
Likely outcome: GRANTED. This is the strongest path because the allocation is clear (all items are the husband’s business).

IRC 6015(f) (equitable relief):

This is the backup if (b) or (c) are denied.
Factors favor the wife: divorced, no knowledge, no benefit, economic hardship (teacher’s salary, no savings), compliance since divorce.

Result: the wife’s liability is reduced to $0. The husband is solely liable for the $30,000.

Common mistake: not filing Form 8857 within the 2-year deadline. Many divorced spouses receive collection notices years after the divorce and assume they have no options. The 2-year clock starts at the FIRST collection activity, not the audit or assessment. If the IRS has not yet begun collection, there is no deadline. But once the CP504 arrives, the clock is ticking.

Illustrative numbers only, not a real client and not advice for your facts.

Related guides:

IRS Installment Agreements: Payment Plans for Small Businesses That Owe Back Taxes

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Cite this page

Yarik Yarosh, CPA. "Innocent Spouse Relief: How to Remove Tax Liability from a Joint Return." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/small-business-innocent-spouse-relief

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.