Early in my practice I watched a colleague get hit with a batch of IRC § 6695(g) penalties after an IRS due diligence audit of their EIC returns – not because the credits were wrong, but because the documentation record was thin and inconsistent across preparers in the office. The credits were legitimate. The process to document them was not. Form 15601 and a disciplined due diligence workflow are the difference between a clean IRS audit and a five-figure penalty bill.
Key Takeaways
- Form 15601 is an internal due diligence documentation form used by paid tax return preparers to record the information gathered and questions asked when preparing returns claiming the Earned Income Credit – and by extension, the Child Tax Credit, American Opportunity Tax Credit, and Head of Household filing status.
- Who uses it: Any paid tax preparer who prepares a federal income tax return claiming the EIC is required to meet due diligence requirements under IRC § 6695(g). Form 15601 (or an equivalent internal record) documents that the preparer met those requirements.
- Not filed with the return: Form 15601 is retained by the preparer – it is not submitted to the IRS with the tax return. Form 8867 is the due diligence checklist that is filed with the return.
- Penalty exposure: Failure to comply with EIC due diligence requirements carries a penalty of $600 per return (indexed; confirm the current year’s amount) per credit subject to due diligence requirements – applicable separately for EIC, CTC, AOTC, and HoH.
- Retention requirement: Due diligence records, including Form 15601, must be retained for three years from the later of the return due date or actual filing date.
- SOP tip: Build EIC due diligence documentation into your firm’s return preparation workflow as a gated step – the return cannot be reviewed or transmitted until the Form 15601 (or equivalent) is complete and signed by the preparer.
What Form 15601 Is and When to Use It
Form 15601, “Earned Income Credit Due Diligence,” is an IRS-provided template for the internal due diligence documentation record that paid tax return preparers are required to maintain under Treas. Reg. § 1.6695-2 when they prepare returns claiming the Earned Income Credit. The form documents the questions asked, the information gathered, and the determinations made to support the EIC claim on the return.
The EIC due diligence requirement under IRC § 6695(g) has been in place since 1997 and has been substantially expanded by Congress over the years to cover additional refundable credits and, more recently, the Head of Household filing status. The requirement reflects Congress’s recognition that improper EIC claims represent one of the largest categories of tax error and fraud in the U.S. tax system, and that paid preparers play a critical role in either preventing or enabling these errors.
Form 15601 itself is not a form that is filed with the IRS – it is an internal record. The IRS makes the form available as a standardized template that preparers can use to meet their documentation obligation, but firms are not required to use this specific form as long as their internal documentation captures equivalent information. Using the IRS’s Form 15601 template is generally the lowest-risk approach because it is designed to track the regulatory requirements.
When the Due Diligence Requirement Applies
The due diligence requirement applies to every paid tax return preparer who prepares any return or claim for refund that includes a claim for the EIC, the CTC/ACTC, the AOTC, or the HoH filing status. “Paid preparer” means any individual who is compensated for preparing the return or a substantial portion of it – including employees of tax preparation firms who prepare returns as part of their job duties. The requirement applies regardless of whether the credit is ultimately allowed by the IRS.
The Role of Form 15601 in Firm Compliance
From my side of the desk, Form 15601 serves two purposes simultaneously: it creates the documentation record the preparer needs to defend against penalties, and it structures the questioning process that helps catch ineligible credit claims before they are filed. A preparer who works through Form 15601 systematically will naturally surface the red flags that an informal process might miss. The discipline the form imposes benefits both the preparer and the taxpayer.
How to Complete Form 15601
Form 15601 is organized around the key EIC eligibility factors. The preparer works through each section, records the client’s answers to the relevant questions, and documents how they determined that the client meets each applicable requirement.
| Section | What It Covers | Practitioner Tip |
|---|---|---|
| Taxpayer Identification | Name, SSN, and tax year for the return | Confirms the record is linked to the specific return for which it applies |
| Qualifying Child Information | Name, SSN, relationship, age, and residency for each qualifying child claimed | All three tests (relationship, age, residency) must be documented separately for each child |
| Residency Verification | Documentation of how the child’s residency with the taxpayer was verified | Record what documentation was reviewed – school records, medical records, housing documents; do not rely solely on taxpayer assertion |
| Earned Income Verification | Sources of earned income and how they were verified | Document all earned income sources, including self-employment; verify that the earned income figure used for the credit calculation is accurate |
| Filing Status | Confirmation that the filing status used is appropriate and consistent with EIC eligibility | Married Filing Separately cannot claim EIC; confirm that the taxpayer’s marital status is accurately reflected |
| Preparer Questions Asked | Record of the specific questions posed to the taxpayer and the taxpayer’s responses | Document the actual questions and responses, not just a checkbox – vague documentation does not protect the preparer |
| Additional Documentation Reviewed | List of documents reviewed by the preparer to support the EIC claim | List documents specifically – “W-2 from XYZ Employer, school enrollment letter dated mm/dd/yyyy” is better documentation than “employment records” |
| Preparer Signature and Date | Signature of the preparer completing the due diligence | The preparer who signed the return should be the one who completed the due diligence – this confirms personal responsibility for the documentation |
What Level of Documentation Is Enough
The regulation requires documentation that is “sufficient for the IRS to determine that the preparer asked all required questions and obtained the required information.” This is a facts-and-circumstances standard, not a bright-line test. In practice, the more specific and detailed the documentation, the better protected the preparer is in an IRS due diligence audit. A completed Form 15601 with specific document references and clear question-and-answer records is far stronger than a checkbox sheet with no supporting detail.
EIC Due Diligence Penalties Under IRC 6695(g)
The penalty framework for EIC due diligence failures is significant and structured in a way that can multiply quickly across a preparer’s season workload.
Penalty Amount and Inflation Adjustment
The base penalty under IRC § 6695(g) is $500 per return (originally), but it has been adjusted for inflation periodically and is currently $600 per failure (confirm the current-year amount against IRS guidance). The penalty applies per return, per credit for which the due diligence requirement was not met. This means a single return where both the EIC and the CTC due diligence requirements are not met can generate two separate penalties.
Penalty Applies Per Credit Per Return
This is the point most preparers underestimate. If a preparer prepares 100 EIC returns in a season without adequate due diligence documentation, the total penalty exposure is 100 × $600 = $60,000 – just for the EIC. If those same returns also claimed the CTC without proper diligence, another $60,000 of exposure exists. The multiplicative nature of the penalty makes due diligence compliance not just a regulatory checkbox but a financial survival issue for high-volume EIC preparers.
When the IRS Asserts Due Diligence Penalties
The IRS identifies EIC due diligence compliance issues through preparer audits and examinations. These audits may be triggered by a pattern of disallowed EIC claims among a preparer’s clients, by IRS data analysis identifying preparers with high EIC error rates, or by random compliance reviews. During the audit, the IRS will request copies of the preparer’s due diligence documentation records for the returns under review. If the records are absent, incomplete, or fail to show that the required questions were asked, the penalties are asserted.
Reasonable Cause Exception
A preparer may avoid the IRC § 6695(g) penalty if they can demonstrate reasonable cause for the failure and that they acted in good faith. The IRS’s reasonable cause standard in this context is narrow – reliance on false information provided by the taxpayer can qualify, but only if the preparer made reasonable inquiries given the circumstances and had no reason to know the information was false. Simply relying on the taxpayer’s word without asking required questions does not constitute reasonable cause.
The Four Due Diligence Requirements
Treas. Reg. § 1.6695-2 specifies four distinct due diligence requirements that apply to every paid preparer who prepares a return claiming the EIC (and the other covered credits).
Requirement 1: Compute the Credit Correctly
The preparer must compute the EIC using the information collected from the taxpayer and must do so in accordance with the applicable law. Software handles the computation in most cases, but the preparer is responsible for ensuring that the input data is accurate. An incorrect EIC computation that results from inaccurate income or dependency information entered into the software is the preparer’s responsibility.
Requirement 2: Complete and File Form 8867
Form 8867, Paid Preparer’s Due Diligence Checklist, must be completed and submitted with every return that claims the EIC (and other covered credits). This is the filed portion of the due diligence requirement – the form that goes to the IRS with the return. Form 8867 asks specific questions about qualifying child eligibility, income, and filing status. Failing to file Form 8867 with an EIC return is itself a due diligence failure subject to penalty.
Requirement 3: Complete the EIC Worksheet
The preparer must complete the applicable EIC worksheet (or use the software’s equivalent) to determine the correct credit amount. The worksheet confirms that the income, phase-out, and credit amount are correctly calculated. This requirement exists to ensure that the credit computation is performed systematically rather than estimated.
Requirement 4: Document the Due Diligence
This is where Form 15601 comes in. The preparer must document the information gathered to support the EIC claim, including the questions asked, the taxpayer’s responses, and the documentation reviewed. This record must be retained for three years and must be available for IRS inspection on request. The documentation requirement is the one most commonly cited in IRS due diligence audit findings.
Other Credits Subject to Due Diligence Requirements
Congress has expanded the EIC due diligence requirement over time to cover additional refundable credits. Preparers who understand this expansion avoid the mistake of treating Form 15601 documentation as an EIC-only obligation.
Child Tax Credit and Additional Child Tax Credit
The CTC and ACTC are subject to the same IRC § 6695(g) due diligence requirements as the EIC. The qualifying child determination is central to both credits, and due diligence documentation must address the child’s relationship, age, and residency. A return claiming both EIC and CTC requires due diligence compliance for both credits, and penalty failures on the same return can be assessed for each credit independently.
American Opportunity Tax Credit
The AOTC was added to the due diligence requirement in 2016. The key eligibility factors for AOTC due diligence include confirming the student’s enrollment status, verifying that the student is in the first four years of post-secondary education, and confirming that the taxpayer did not claim the AOTC for more than four years. Documentation of educational enrollment status and prior credit history is essential.
The Interplay With Form 8863
Form 8863 is filed with the return to claim the education credits. Like Form 8867 for EIC, Form 8863 must be completed accurately. The preparer’s internal documentation – using Form 15601 or equivalent – should document how the student’s eligibility was verified beyond what the Form 1098-T alone shows.
Head of Household Due Diligence
The Head of Household filing status was added to the IRC § 6695(g) due diligence requirement by the Protecting Americans from Tax Hikes Act (PATH Act) effective for tax years beginning January 1, 2016.
Why HoH Was Added to the Requirement
Head of Household is the most commonly misapplied filing status in individual tax returns. The incorrect use of HoH results in a lower tax rate and a higher standard deduction than the taxpayer is entitled to – in effect, an improper tax benefit. By adding HoH to the due diligence requirement, Congress placed responsibility on paid preparers to verify that HoH is appropriate before claiming it on a return.
What Due Diligence Requires for HoH
For Head of Household due diligence, the preparer must confirm that the taxpayer is unmarried (or treated as unmarried) at the end of the tax year, that the taxpayer paid more than half the cost of maintaining a qualifying home for the year, and that a qualifying person (typically a qualifying child or qualifying relative) lived with the taxpayer for more than half the year. Documentation of the household situation – not just the taxpayer’s assertion – is what protects the preparer.
Common HoH Due Diligence Failures
The most common HoH due diligence failure I see is applying the filing status for a taxpayer who is separated but not legally treated as unmarried under IRC § 7703, or for a taxpayer whose qualifying person lived with another household member for the majority of the year. Asking the right questions and documenting the answers prevents both of these errors.
IRS Due Diligence Audits of Preparers
Understanding how the IRS conducts due diligence audits of preparers helps firms structure their compliance programs to withstand scrutiny.
How Preparer Audits Are Initiated
The IRS identifies preparers for due diligence compliance review through several channels: data analysis of EIC claim patterns across a preparer’s returns, the IRS’s preparer compliance database, referrals from taxpayer audit results, and random compliance reviews. Preparers with high EIC claim volumes, unusual credit amounts, or patterns of disallowed credits are more likely to be selected for review.
What the IRS Requests in a Due Diligence Audit
In a due diligence compliance audit, the IRS will typically request copies of the preparer’s due diligence documentation for a sample of returns. This is where Form 15601 records become critical. If the records are complete, specific, and consistently maintained, the preparer is in a strong position. If records are missing, generic, or inconsistent across the sample, the IRS will assert penalties for each return where the documentation is deficient.
Systemic Deficiency Findings
If the IRS determines that a preparer has a systemic failure to maintain due diligence records – meaning the problem exists across the preparer’s practice rather than on isolated returns – the penalties can be assessed broadly. The IRS may also impose injunctions on preparers with serious or repeated due diligence failures, preventing them from preparing returns in the future. The stakes go beyond a one-time penalty for high-volume preparers who ignore this requirement.
Form 15601 vs. Form 8867
The relationship between these two forms is a source of consistent confusion among newer practitioners. The distinction is straightforward once understood.
| Form | Who Completes It | Filed With Return? | Purpose |
|---|---|---|---|
| Form 8867 | Paid preparer | Yes – filed with every EIC (and CTC/AOTC/HoH) return | Due diligence checklist submitted to IRS to document that required questions were asked |
| Form 15601 | Paid preparer | No – retained by the preparer | Internal due diligence documentation record documenting the information gathered and verification steps taken |
Both forms are required components of a complete EIC due diligence compliance program. Form 8867 satisfies the filing requirement; Form 15601 (or equivalent) satisfies the retention requirement. Completing one without the other leaves a gap in due diligence compliance.
Common Mistakes That Slow Things Down
- Treating Form 8867 as the only due diligence requirement – Filing Form 8867 with the return is one of four requirements. The internal documentation record (Form 15601) must also be completed and retained. Many preparers complete only Form 8867 and have no internal record.
- Generic or checkbox-only documentation – A Form 15601 that says “client confirmed” without specifics does not protect the preparer. Document the specific questions asked and the specific answers given.
- Not documenting residency verification – Residency of the qualifying child is the most commonly challenged EIC eligibility element. Document what evidence was reviewed to support the residency determination.
- Failing to apply due diligence to CTC, AOTC, and HoH – The due diligence requirement covers all four categories. Preparers who maintain EIC records but not CTC or HoH records are still exposed to penalties.
- Not retaining records for three years – The retention period runs from the later of the return due date or filing date. Returns filed late have a longer retention window than preparers often realize.
- Having different preparers apply inconsistent due diligence standards – In a multi-preparer firm, due diligence quality varies by preparer unless a firm-wide standard is enforced. Inconsistency across a firm’s EIC returns is a red flag in an IRS due diligence audit.
- Not acting on “red flags” in the client interview – If a client provides information that is inconsistent with prior years or internally inconsistent, the preparer is expected to ask follow-up questions. Ignoring red flags does not satisfy the “good faith” reasonable cause standard.
Practical Checklists You Can Reuse
Copy these into your internal wiki or SOP.
EIC Due Diligence Workflow Checklist (Per Return)
- Confirm the return claims EIC, CTC, AOTC, or HoH
- Interview the taxpayer on qualifying child eligibility: relationship, age, residency
- Request and review documentation supporting residency (school records, medical records, utility bills in taxpayer’s name)
- Verify earned income from all sources – W-2s, 1099s, self-employment records
- Confirm filing status is appropriate and consistent with EIC eligibility
- Complete and sign Form 15601 (or firm’s equivalent documentation)
- Complete the EIC worksheet in the software
- Complete Form 8867 for inclusion with the filed return
- File completed Form 15601 in the client due diligence record
Firm-Level EIC Due Diligence Quality Review Checklist
- Confirm firm has a written EIC due diligence policy covering all four regulatory requirements
- Train all preparers on the policy before the start of filing season
- Implement a review gate: no EIC return is transmitted until Form 15601 is complete and initialed by a reviewer
- Sample a portion of EIC returns mid-season to verify documentation quality is consistent across preparers
- Address documentation deficiencies with individual preparers through coaching, not just criticism
- At season end, archive all Form 15601 records with clear client and year identification
EIC Documentation Retention Checklist
- Retain Form 15601 (or equivalent) for each EIC return for three years from the later of the return due date or filing date
- Store records in an organized system that allows retrieval by client name, SSN, and tax year
- For returns filed after the original due date, track the extended retention period separately
- Review retention schedule annually; purge records that have passed the required retention period to avoid unnecessary data storage
- Test retrieval capability periodically – confirm that records can be located and produced within a reasonable timeframe if the IRS requests them
For Accounting Firms – Keep Delivery Smooth While You Scale
High-volume EIC return preparation is one of the areas where offshore delivery support provides the most tangible risk reduction for CPA and tax preparation firms. When EIC returns are prepared by a structured offshore team with standardized due diligence documentation embedded in their workflow – rather than by a rotating group of seasonal staff with varying compliance habits – the consistency of documentation quality improves dramatically. Accountably builds the structured delivery frameworks that make high-volume EIC compliance sustainable across a filing season without the documentation gaps that drive IRS due diligence audit penalties.
We keep this mention brief on purpose, your process comes first.
FAQs About Form 15601
What is the penalty for not completing EIC due diligence on Form 15601?
The penalty under IRC § 6695(g) for failure to comply with EIC due diligence requirements is $600 per return (indexed for inflation; confirm the current year’s amount with IRS guidance) per credit subject to the due diligence requirement. The penalty applies per return, not per taxpayer, and can be assessed separately for the EIC, the Child Tax Credit, the American Opportunity Tax Credit, and the Head of Household filing status – all on the same return if multiple failures exist.
Does the EIC due diligence requirement apply to every return claiming the EIC?
Yes. Every paid tax return preparer who prepares a return claiming the Earned Income Credit must complete the four due diligence requirements. The requirement applies to every EIC return prepared for compensation, regardless of complexity or the client’s apparent eligibility. There are no de minimis exceptions based on credit amount or return complexity.
What is the difference between Form 8867 and Form 15601?
Form 8867 is the Paid Preparer’s Due Diligence Checklist that is filed with the tax return and submitted to the IRS. Form 15601 is an internal due diligence documentation form retained by the preparer – it documents the information gathered and questions asked during the due diligence process. Both are required components of a complete EIC due diligence compliance program.
How long must EIC due diligence records be retained?
IRS regulations require paid preparers to retain EIC due diligence documentation for three years from the latest of the due date of the return (without extensions) or the date the return was actually filed. This retention requirement applies to all due diligence records, including Form 15601 or any equivalent internal documentation maintained by the firm.
Does EIC due diligence apply to the Child Tax Credit and other refundable credits?
Yes. The IRC § 6695(g) due diligence requirement covers the EIC, the Child Tax Credit and Additional Child Tax Credit, the American Opportunity Tax Credit, and the Head of Household filing status. The same four requirements apply to each category, and the penalty can be assessed separately for each failure on the same return. Firms that maintain EIC documentation but not CTC or HoH documentation are only partially compliant.
This article is educational, not tax advice. Rules change, and states differ. Confirm thresholds, deadlines, and elections against the current IRS instructions for your year and facts.