When a married couple files a joint return, both spouses become jointly and severally liable for the full tax, penalties, and interest reported or later assessed on that return. That liability does not automatically dissolve when the marriage ends. A spouse who had little to do with the income that created the tax debt, who did not know about omitted income, or who signed a return under duress may be able to obtain relief under IRC 6015, the innocent spouse statute. The vehicle for requesting that relief is Form 8857, Request for Innocent Spouse Relief. Note the boundary at the outset: this guide covers relief from joint liability. A different problem, where a spouse's share of a joint refund is seized to pay the other spouse's separate debt, is addressed by injured spouse relief on Form 8379, not Form 8857. Confirm which problem the client actually has before selecting a form.
IRC 6015 offers three distinct relief tracks, each with different eligibility requirements, different knowledge standards, and different coverage. Choosing the wrong track, or failing to develop the fact record that the chosen track requires, is the most common practitioner error in these cases. This guide walks through the three relief tracks, the Form 8857 filing requirements, the IRS review and Appeals process, and the practical workflow for building a complete submission. All procedures, deadlines, and regulatory guidance referenced in this guide must be verified at IRS.gov before being relied on in any client matter.
This guide is for informational purposes only and does not constitute legal or tax advice. Relief under IRC 6015 is fact-specific and is not guaranteed for any submission.
What Innocent Spouse Relief Is
IRC 6015 provides three forms of relief from joint and several liability on a jointly filed return. Joint and several liability means both spouses are each individually liable for the full tax, penalties, and interest on a jointly filed return. The IRS can collect the entire amount from either spouse regardless of who earned the income, who generated the underpayment, or what the divorce decree says about responsibility. A court-ordered division of tax liability between divorcing spouses binds the spouses to each other but does not bind the IRS; the IRS can still pursue either spouse for the full amount unless IRC 6015 relief has been granted.
IRC 6015 relief, when granted, eliminates or reduces one spouse's liability for amounts attributable to the other spouse's income or erroneous items. The three relief tracks differ in their scope, eligibility conditions, and the type of tax issue they cover:
Traditional Innocent Spouse Relief (IRC 6015(b))
The classic track and the most protective form of relief. Requires showing that the requesting spouse did not know and had no reason to know of the understatement at the time the return was signed. If granted, the requesting spouse's liability for the understatement attributable to the non-requesting spouse's erroneous items is eliminated entirely. This track applies only to understatements, not underpayments.
Separation of Liability Relief (IRC 6015(c))
Available only after the spouses are no longer married, are legally separated, or have lived apart for the past 12 months before the request. Rather than eliminating liability entirely, this track allocates the understatement between the spouses based on who generated the erroneous items. The requesting spouse bears liability only for the portion allocated to their own income and items. The knowledge standard under 6015(c) is actual knowledge (not reason to know), which is a lower bar for the requesting spouse to clear than the 6015(b) standard.
Equitable Relief (IRC 6015(f))
The catch-all track, available when the requesting spouse does not qualify under 6015(b) or 6015(c). Evaluated under a multi-factor totality-of-circumstances test governed by Rev. Proc. 2013-34. Equitable relief is the only track available for underpayments (as opposed to understatements), making it the only option for a spouse who signed a correct return that was never paid because the other spouse spent the funds. Verify the current version of Rev. Proc. 2013-34 and any superseding guidance at IRS.gov before relying on the factor descriptions in this guide.
Form 8857 is the IRS form for requesting all three types of IRC 6015 relief. The election is made on Form 8857 regardless of which track applies. A single Form 8857 can request relief under multiple tracks for the same tax year; the IRS will evaluate each track for which the requesting spouse may qualify. There is no fee to file Form 8857.
The Three Relief Tracks in Detail
IRC 6015(b): Traditional Innocent Spouse Relief
To qualify for traditional innocent spouse relief under 6015(b), all of the following requirements must be met:
- The request involves a joint return.
- There is an understatement of tax attributable to erroneous items of the non-requesting spouse.
- The requesting spouse did not know, and had no reason to know, of the understatement when the return was signed.
- Taking all facts and circumstances into account, it would be inequitable to hold the requesting spouse liable for the deficiency.
The "reason to know" standard is objective, not subjective. The IRS asks what a reasonable person in the requesting spouse's position would have known, given their education level, business experience, involvement in household finances, and access to the relevant information. A spouse who routinely signed returns without reviewing them may still have "reason to know" if the couple's lifestyle or spending patterns should have prompted questions. Both actual knowledge and constructive knowledge defeat the "did not know" prong of 6015(b).
"Erroneous items" for purposes of 6015(b) means omitted income attributable to the non-requesting spouse, deductions to which the non-requesting spouse was not entitled, and credits claimed by the non-requesting spouse without entitlement. The understatement must be attributable to those erroneous items of the non-requesting spouse; the requesting spouse cannot obtain 6015(b) relief for understatements attributable to their own income or items.
IRC 6015(c): Separation of Liability Relief
Separation of liability relief allocates the deficiency between the spouses rather than eliminating it for the requesting spouse. Key requirements are:
- The spouses are no longer married, are legally separated, or have lived apart for 12 months before the date of the request.
- The requesting spouse did not have actual knowledge of the erroneous items when the return was signed. Note that this is actual knowledge, not reason to know; a requesting spouse who did not actually know of the items at signing can qualify even if a reasonable person in their position might have had reason to know.
- The IRS may rebut the claim with evidence of actual knowledge; the burden of proof on actual knowledge can shift to the IRS in certain circumstances.
Under 6015(c), the deficiency is allocated between the spouses in proportion to who generated the items. The requesting spouse bears liability for the portion of the deficiency allocated to their income and erroneous items; they are not held liable for the portion attributable to the non-requesting spouse. However, if the requesting spouse had actual knowledge of specific erroneous items at the time of signing, the IRS will allocate those items back to the requesting spouse regardless of who technically generated them.
IRC 6015(f): Equitable Relief
Equitable relief is available when the requesting spouse does not qualify under 6015(b) or 6015(c), and when it would be inequitable to hold the requesting spouse liable for the unpaid tax or deficiency. It is the only IRC 6015 track that covers underpayments (tax correctly reported on the return but not paid). A spouse who signed a correct return and did not pay because the other spouse controlled the funds and spent them cannot use 6015(b) or 6015(c); equitable relief under 6015(f) is their only avenue.
REGULATORY HEDGE: REV. PROC. 2013-34
Rev. Proc. 2013-34 governs the equitable relief analysis. Verify the current version of this revenue procedure and any superseding guidance at IRS.gov before using these factors in any client matter. The factor descriptions below reflect the guidance as published; IRS practice and Tax Court interpretations may have evolved since publication.
The Rev. Proc. 2013-34 factors the IRS evaluates in a multi-factor balancing test are:
- Marital status at time of request: Being divorced or separated at the time of the Form 8857 filing weighs in favor of granting relief.
- Economic hardship: Whether the requesting spouse will suffer economic hardship if relief is not granted. Hardship is evaluated using the IRS Collection Financial Standards as a benchmark.
- Knowledge or reason to know: Whether the requesting spouse knew or had reason to know of the understatement (for understatement cases) or knew or had reason to know that the non-requesting spouse would not pay the tax (for underpayment cases). Lack of knowledge weighs in favor; knowledge weighs against.
- Legal obligation of the non-requesting spouse: Whether a divorce decree or separation agreement requires the non-requesting spouse to pay the tax. If so, and the non-requesting spouse has not complied, this factor weighs in favor of the requesting spouse.
- Significant benefit: Whether the requesting spouse significantly benefited from the unpaid tax or understatement beyond normal support. Lavish spending financed by the unpaid tax weighs against relief.
- Health or abuse: Whether the requesting spouse was in poor health, was abused, or was under duress when signing the return. Documented abuse or coercion weighs strongly in favor of relief.
- Compliance with current obligations: Whether the requesting spouse is current with their own tax filing and payment obligations. Current compliance weighs in favor of relief.
No single factor is determinative. The IRS weighs the totality of the circumstances. Practitioners should build the fact record for every Rev. Proc. 2013-34 factor, including factors that weigh against the client, and address each one in the Form 8857 narrative statement. Ignoring unfavorable factors creates a credibility gap rather than avoiding the issue.
For clients facing economic hardship that makes paying the joint tax impossible even apart from the innocent spouse question, the currently not collectible (CNC) practitioner guide covers how the IRS evaluates hardship using the Collection Financial Standards framework that also informs the equitable relief analysis.
Form 8857: Filing Requirements and Practical Guidance
Form 8857 is available at IRS.gov at no cost. It is the required vehicle for requesting relief under all three IRC 6015 tracks. Do not attempt to request innocent spouse relief by letter, by filing an amended return, or through a response to a notice; use Form 8857 and follow the current filing instructions.
REGULATORY HEDGE: FILING DEADLINES
Verify current filing deadlines at IRS.gov before filing. Deadlines for IRC 6015 relief, particularly equitable relief, have been modified by IRS guidance and litigation. Do not rely on general statements about deadlines; check current IRS guidance and any applicable court orders before filing. For 6015(b) and (c) relief, the traditional rule requires the request to be filed no later than 2 years after the IRS first began collection activity against the requesting spouse for the joint liability. For 6015(f) equitable relief, the IRS has aligned the deadline with the statute of limitations on collection (generally 10 years from assessment under IRC 6502, subject to tolling). The deadline rules have been the subject of litigation and may have been further modified; confirm the current rules before advising a client.
Form 8857 Structure and the Statement of Facts
Form 8857 is organized into sections that track the eligibility requirements for each relief track. Practitioners should complete every applicable section carefully:
- Part I: Basic identifying information for the requesting spouse and the non-requesting spouse.
- Part II: Identifies the tax years at issue, the type of return filed, and information about the non-requesting spouse's income and financial activity.
- Part III: Applies specifically to equitable relief requests under 6015(f). This section requires a detailed narrative statement of the relevant facts and circumstances.
The written narrative statement (Part III and any attached statement) is where practitioners add the most value to the submission. A Form 8857 filed with minimal narrative almost always results in a denial at the initial review stage. A complete, organized statement that addresses each Rev. Proc. 2013-34 factor, with supporting documentation attached, substantially increases the likelihood of an initial grant and a more efficient review process.
When the submission involves a CP2000 underreporting notice that generated the joint liability in the first place, the CP2000 response guide explains how CP2000 underreporting notices create joint liability issues and how the CP2000 response process interacts with the innocent spouse filing.
Documentation to Attach
A complete Form 8857 submission includes supporting documentation for each factual claim in the narrative. Depending on the case, relevant documentation may include:
- Divorce decree or separation agreement, including any provisions assigning tax liability between the spouses.
- Financial records demonstrating disparity in income, financial control, and access to funds during the years at issue.
- Bank records showing where the tax funds went and who controlled the account.
- Domestic violence or protective order records where abuse or coercion is a factor.
- Medical records where health is a factor.
- Evidence that the non-requesting spouse controlled the filing and financial decisions and that the requesting spouse had limited access to or understanding of the return.
- Evidence of the requesting spouse's current tax compliance (filed returns, payment history).
The Non-Requesting Spouse Notification
When a Form 8857 is filed, the IRS is required by statute to notify the non-requesting spouse (or former spouse) that the request has been made. The non-requesting spouse has an opportunity to provide information to the IRS that may be relevant to the determination. This is a mandatory IRS procedural step; it is not an option the practitioner controls, and it cannot be waived. Practitioners must advise clients in advance that the former spouse will be contacted by the IRS and may learn of the filing. Clients who are concerned about this contact (particularly in domestic violence situations) should notify the practitioner so that appropriate steps can be taken to protect the requesting spouse's address and safety during the IRS process.
IRS Review Process and Appeals
Initial Review by the Centralized Innocent Spouse Unit
The IRS Centralized Innocent Spouse Unit reviews all Form 8857 requests. Response times vary; verify current processing times at IRS.gov, as the unit's workload and staffing levels affect how long initial review takes. During review, collection activity against the requesting spouse on the joint liability is generally suspended, which is an important protection for clients who received a levy notice or notice of federal tax lien in connection with the joint debt. See the penalty abatement guide for options that may reduce the underlying liability even if innocent spouse relief is not fully granted. Penalties are part of the joint liability; abatement of penalties through first-time abatement or reasonable cause may be pursued in parallel with or in sequence to the innocent spouse request.
Preliminary and Final Determinations
If the IRS proposes to deny the request, it issues a preliminary determination letter before making a final decision. The requesting spouse has an opportunity, after receiving the preliminary letter, to submit additional information or request an Appeals conference. This window before the final determination is often underused; practitioners who receive a preliminary denial should immediately assess whether additional documentation or factual development can address the IRS's stated grounds for denial, and submit it before the final determination issues.
Appeals Review
After a final determination, the requesting spouse can request review through the IRS Independent Office of Appeals using the normal Appeals process. Appeals applies the same Rev. Proc. 2013-34 framework for equitable relief cases but conducts an independent review and is not bound by the initial determination. This is a meaningful avenue: many initially denied requests succeed at Appeals with a more complete fact record. The Appeals conference also provides an opportunity to address specific concerns the IRS identified in the final determination letter and to present additional documentation that was not available at the time of the original filing.
For clients whose collection liability is also being considered through other resolution tracks, the OIC reasonable collection potential guide covers how the IRS evaluates collection potential, which is relevant context when equitable relief and collection resolution are being pursued simultaneously.
Tax Court Petition
If relief is denied at the administrative level, the requesting spouse may petition Tax Court. The petition must be filed within 90 days of the final determination letter (or 150 days if the determination letter is addressed to a person outside the United States). Tax Court has independent review jurisdiction over IRC 6015 cases under IRC 6015(e) and conducts de novo review; it is not limited to the administrative record. This is a meaningful litigation avenue, particularly for equitable relief cases where the fact record is strong and the IRS's initial determination did not fully weigh the relevant circumstances.
REGULATORY HEDGE: TAX COURT PETITION DEADLINE
The 90-day window (150 days if outside the United States) for petitioning Tax Court after a final determination must be verified against the actual determination letter received. Do not rely on general statements about this deadline; calendar from the date on the letter and verify the applicable deadline before advising a client on their litigation options.
Community Property State Considerations
IRC 6015 interacts with community property law in ways that can be favorable or unfavorable for the requesting spouse. In community property states, income earned during the marriage is generally treated as community property for federal tax purposes. Requesting spouses in those states may also have access to Community Property Innocent Spouse rules addressed in IRS Publication 971 and Rev. Proc. 2013-34.
REGULATORY HEDGE: COMMUNITY PROPERTY RULES
Community property law varies significantly by state; verify the specific community property rules applicable to the client's state before advising on how they interact with IRC 6015 relief. The interaction of IRC 6015 with community property law is state-specific and complex; verify applicable state law and current IRS guidance at IRS.gov before advising a client in a community property state.
Practical Workflow for Practitioners
An IRC 6015 representation engagement has more moving parts than a standard collection matter. The following workflow covers the steps from intake through final resolution:
Identify all open tax years with joint liability
Pull transcripts for all years with a balance due. Determine which years involve understatements (amounts assessed beyond what the return reported) versus underpayments (tax reported correctly but not paid). This distinction determines which relief tracks are available: 6015(b) and 6015(c) apply only to understatements; 6015(f) is required for underpayments.
Assess current marital and separation status
Determine whether the spouses are divorced, legally separated, or have lived apart for 12 months or more. This determines eligibility for separation of liability relief under 6015(c), which is available only to spouses who meet one of these three conditions.
Evaluate knowledge for each year and each erroneous item
For each tax year at issue and each erroneous item, assess the requesting spouse's actual knowledge and constructive knowledge at the time of signing. Develop the facts around the requesting spouse's education, financial involvement, access to records, and lifestyle context during the years at issue.
Gather documentation
Collect the divorce decree, financial records for the years at issue, the tax returns and transcripts, evidence of the non-requesting spouse's income and financial control, any domestic violence or health records, and bank records showing who controlled the funds. Identify any community property considerations applicable to the client's state.
Build the fact statement for each Rev. Proc. 2013-34 factor
For equitable relief cases, address every factor in Rev. Proc. 2013-34, including those that weigh against the client. The IRS will weigh all factors; acknowledging and contextualizing unfavorable facts is more credible than omitting them. Verify the current version of Rev. Proc. 2013-34 and any superseding guidance at IRS.gov before finalizing the statement.
Prepare Form 8857 with complete narrative and attachments
Complete all applicable parts of Form 8857. Attach the written narrative statement that addresses the applicable requirements for each relief track requested, and attach all supporting documentation. The narrative is the case; a form with no narrative is not a complete submission.
File with the correct IRS address and retain proof of submission
File Form 8857 at the address specified in the current Form 8857 instructions at IRS.gov. Do not file it as part of a Tax Court petition, at the exam level, or in response to a notice at the notice response address. Retain dated proof of submission (certified mail return receipt or IRS acknowledgment).
Prepare the client for non-requesting spouse notification
Advise the client that the IRS will notify the non-requesting spouse (or former spouse) that Form 8857 has been filed. The non-requesting spouse may submit information to the IRS. Prepare the client for this contact before it happens, particularly in cases involving a difficult or contentious relationship with the former spouse.
Monitor for the preliminary determination
Watch for the preliminary determination letter and respond promptly with supplemental information if the IRS proposes a denial. The window between the preliminary and final determination is the best opportunity to address specific IRS concerns before they harden into a final decision. Request an Appeals conference before the final determination if the preliminary position is adverse and the case has merit.
If denied, proceed to Appeals and then Tax Court if warranted
A denial at the initial review level is not the end of the case. Proceed to the IRS Independent Office of Appeals with a more developed record, addressing the specific grounds the IRS cited in the final determination. If denied at Appeals, evaluate a Tax Court petition within 90 days of the final determination letter. Verify the petition deadline against the actual letter date before advising the client.
Common Mistakes Practitioners Make
Innocent spouse cases are won or lost in the preparation. The following mistakes account for most preventable denials:
- Filing too late. The 2-year limitation triggered by the date of first IRS collection activity is a hard deadline for 6015(b) and 6015(c) cases. The moment you receive a case, identify and calendar the date the IRS first began collection activity against the requesting spouse on the joint liability. Missing the deadline bars the claim entirely, and no amount of factual development will overcome it.
- Filing without a complete fact statement. A Form 8857 that lists the years at issue but provides no narrative is not a submission; it is an invitation to deny. The narrative statement is the entire case for equitable relief. A form filed without it will almost certainly result in a denial, and the record for an Appeals challenge will be weaker for having started there.
- Confusing understatements and underpayments. Only equitable relief under 6015(f) covers underpayments. Advising a client to file only a 6015(b) or 6015(c) claim when the issue is an underpayment on a correctly filed return will result in a denial on the merits, not on procedure. Identify the correct relief track before filing.
- Failing to address unfavorable factors. The IRS reviews all Rev. Proc. 2013-34 factors. Omitting the ones that cut against the client does not make them disappear; it makes the submission look incomplete or evasive. Address each factor squarely, explain the context, and let the favorable factors outweigh the unfavorable ones rather than pretending the unfavorable ones do not exist.
- Not notifying the client about the non-requesting spouse notification. Clients are frequently surprised and distressed when they learn the former spouse has been contacted by the IRS regarding the Form 8857 filing. The IRS contact is mandatory and statutory; it cannot be avoided. Prepare clients for this reality at intake, before the filing is made, so they can plan for the former spouse's potential response.
Related Guides
Regulatory Verification Notice
The following items must be verified before relying on them in any specific client matter: (1) Form 8857 filing deadlines: the time limits for all three IRC 6015 relief tracks have been subject to IRS guidance updates and litigation; verify current deadlines at IRS.gov before filing. (2) Rev. Proc. 2013-34 factor list: verify the current version of this revenue procedure and any superseding guidance at IRS.gov. (3) Community property state rules: the interaction of IRC 6015 with community property law is state-specific and complex; verify applicable state law and current IRS guidance. (4) Tax Court petition deadline: the 90-day window (150 days if outside the United States) for petitioning Tax Court after a final determination should be verified against the actual determination letter.
Frequently Asked Questions
What is the difference between innocent spouse relief and separation of liability relief?
Traditional innocent spouse relief under IRC 6015(b) eliminates the requesting spouse's liability for the entire understatement attributable to the non-requesting spouse's erroneous items, provided the requesting spouse did not know and had no reason to know of the understatement when the return was signed. Separation of liability relief under IRC 6015(c) allocates the understatement between the spouses in proportion to who generated the erroneous items; the requesting spouse bears liability only for the portion allocated to their own items. Separation of liability is available only after the spouses are no longer married, legally separated, or have lived apart for 12 months before the request. The knowledge standard also differs: 6015(b) uses a reason-to-know standard, while 6015(c) requires actual knowledge at signing. Verify current requirements for both tracks at IRS.gov before filing.
Can innocent spouse relief apply to underpaid taxes as well as understatements?
No, not under the traditional or separation of liability tracks. IRC 6015(b) and 6015(c) apply only to understatements of tax, not to underpayments (tax correctly reported on the return but not paid). If the joint return was correct but the tax was not paid because the other spouse controlled and spent the funds, only equitable relief under IRC 6015(f) is available. Filing a Form 8857 requesting only 6015(b) or 6015(c) relief when the issue is an underpayment will result in a denial on the merits. Verify current guidance at IRS.gov before filing.
What happens to collection activity while Form 8857 is pending?
During the IRS review of a Form 8857 request, collection activity against the requesting spouse on the joint liability is generally suspended. This suspension does not eliminate the liability during review; it defers collection pending the determination. Practitioners should verify current IRS collection suspension procedures with the Centralized Innocent Spouse Unit and monitor for any collection notices issued during the review period. Verify current procedures at IRS.gov.
Can I appeal a denial of innocent spouse relief?
Yes. After a preliminary determination proposing denial, the requesting spouse may submit additional information or request an Appeals conference before a final determination issues. After a final determination, the requesting spouse may appeal through the IRS Independent Office of Appeals. If denied at the administrative level, the requesting spouse may petition Tax Court within 90 days of the final determination letter (150 days if addressed outside the United States); Tax Court conducts de novo review under IRC 6015(e). Verify the current petition deadline against the actual determination letter received; do not rely on general statements about this deadline.
My client is divorced but signed the joint return years ago -- does divorce help?
Yes, in two important ways. First, divorce after the return was filed opens eligibility for separation of liability relief under IRC 6015(c), which is available only to spouses who are no longer married, legally separated, or have lived apart for 12 months before the request. Second, under the Rev. Proc. 2013-34 multi-factor test for equitable relief, being divorced or separated at the time of the Form 8857 filing is a factor that weighs in favor of granting relief. The divorce decree and any tax-related provisions in the separation agreement are relevant documents that should be attached to the Form 8857 submission. Verify current eligibility requirements at IRS.gov.
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