When you sign a joint return, you sign for the whole bill — including tax that came from your spouse’s income, deductions, or credits. Section 6015 of the tax code is the escape hatch: three different types of innocent spouse relief, each built for a different situation, each with its own gate and its own deadline. This page is the triage. It explains the liability you start with, compares the three relief types side by side, and points you to the page that goes deep on the one that fits. The form itself — Form 8857 — is shared by all three.
General information, not tax or legal advice. Rules below are from the Internal Revenue Code §6015, IRS Publication 971, and the Form 8857 instructions; relief decisions are fact-specific, and the IRS weighs what you file carefully.
Spouses who file a joint return are each liable for the entire tax, interest, and penalties on it — §6013(d)(3). It does not matter whose income produced the tax, who earned what, or who benefited. It also does not matter what a divorce decree says: a decree can assign the tax to your former spouse as between the two of you, but it does not bind the IRS, which can still collect the full amount from either of you. Innocent spouse relief is how you ask the IRS itself to let you out of that shared liability.
Everything in this family turns on which kind of tax debt you have:
Two of the three relief types reach understatements only. Only the third reaches underpayments as well. The Form 8857 instructions put it in one line: equitable relief is the only type of relief available for an unpaid tax.
Innocent spouse relief — §6015(b). The classic route. It relieves you of liability attributable to an understatement caused by your spouse’s erroneous items, where you did not know and had no reason to know of the understatement, and holding you liable would be inequitable. It is an election with a hard deadline (below).
Separation of liability — §6015(c). Instead of pardoning you, it splits the deficiency: your liability is capped at the portion of the understatement allocable to you, computed item by item as if you had filed separately. It is gated by marital status — you must be divorced, legally separated, widowed, or living apart — and it is covered in depth in the separation of liability guide.
Equitable relief — §6015(f). The discretionary, last-resort route. If relief is not available under (b) or (c), the IRS may still relieve you — of an understatement or an underpayment — where holding you liable would be inequitable on all the facts and circumstances. It is the only route that reaches a correctly reported but unpaid bill, and the only one whose deadline is not the 2-year clock. The full framework is in the equitable relief guide.
| Your situation | Relief type | Deadline to know |
|---|---|---|
| Joint return understated tax because of your spouse’s erroneous items; you didn’t know and had no reason to know | §6015(b) innocent spouse relief | Within 2 years after the IRS begins collection activities against you |
| Divorced, legally separated, widowed, or not living with your spouse for the past 12 months; the deficiency came mostly from their items | §6015(c) separation of liability | Within 2 years after the IRS begins collection activities against you |
| The return was correct but the tax was never paid — or you missed the 2-year window, or (b)/(c) don’t fit | §6015(f) equitable relief | Before the §6502 collection period expires (unpaid tax) or within the §6511 refund-claim period (tax already paid) |
| You filed no joint return, but live in a community property state and tax was assessed on your spouse’s community income | §66(c) relief (see the note below) | A separate deadline applies — check the Form 8857 instructions |
One form — Form 8857 — puts all three §6015 types in front of the IRS at once, and the IRS considers each in sequence. You do not have to pick perfectly; you do have to file on time. While a request is pending, collection against you for the years in the request is generally suspended, though the collection period is extended by the pendency plus 60 days — the mechanics are in the Form 8857 walkthrough.
The line between the two relief families is one sentence: refund taken for the other spouse’s separate debt → injured spouse (8379); liability for tax on a joint return → innocent spouse relief (8857). If the IRS took your share of a refund to pay a debt that was your spouse’s alone — back child support, a student loan, their separate tax bill — that is not this page’s problem, and Form 8857 cannot fix it. That is injured spouse relief, claimed on Form 8379; the distinction and the form are covered in the injured spouse guide. This page and this cluster teach the liability side only.
If you live in Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, or Wisconsin and did not file a joint return, you may still be taxed on an item of community income treated as your spouse’s. Section 66(c) allows relief where the item was not included in your income, you did not know and had no reason to know of it, and including it would be inequitable — or equitable relief under §66(c)‘s second sentence. It is requested on the same Form 8857, but it is a separate route from §6015, with its own filing deadline; read the community property section of the Form 8857 instructions before relying on the timelines above. The underlying idea mirrors innocent spouse relief — you are being taxed on income that was never really yours to report — but it arises without a joint return ever being filed, which is why it has its own statute and its own clock.
My spouse owes taxes. Am I liable? If you filed jointly, yes — by default you are liable for the entire joint bill, including tax attributable to your spouse’s items, and a divorce decree assigning the tax to them does not change what the IRS can collect from you. Innocent spouse relief under §6015 is the mechanism for asking the IRS to release you from some or all of that liability.
What is the difference between injured spouse and innocent spouse? An injured spouse recovers their share of a refund that was applied to the other spouse’s separate past-due debts, using Form 8379 — the tax itself was never disputed. An innocent spouse asks to be released from liability for the tax itself on a joint return, using Form 8857. Different problem, different form.
Can I be relieved of responsibility for tax my spouse improperly reported? That is exactly what §6015 is for. Depending on your situation, relief can come as innocent spouse relief under (b), a separation of liability under (c), or equitable relief under (f) — each is requested on Form 8857, and the table above shows which gate and deadline apply to each.
General information, not tax or legal advice. Sources: 26 USC §§6013(d)(3), 6015, 66(c); IRS Publication 971, Tax Relief for Innocent Spouses; Instructions for Form 8857 (06/2021), including “Types of Relief” and “Community Property Laws”; Rev. Proc. 2013-34. Currency verified 2026-10-23.