ERC Nominal Effect: How the 10% Safe Harbor Can Make or Break Your Credit

By Eric Tuthill, CPA

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Complex Tax Credit & Incentive Matters: What Your Business Needs to Know

    The Employee Retention Credit represents one of the most significant tax relief provisions from the COVID-19 era, yet qualifying for it remains surprisingly complex. For businesses that continued operating under government restrictions in 2020 and 2021, the nominal effect test often determines whether thousands—or even millions—of dollars in refundable tax credits are available.

    Understanding how this test works, and more importantly, how to document it properly, has become critical as the IRS intensifies scrutiny of ERC claims.

    Table of Contents

    Use this guide to jump directly to your specific question about the ERC nominal effect standard and partial suspension eligibility.

    For a comprehensive overview of this topic, visit our detailed erc nominal effect advisory page.

    Fast Answer: What the ERC “Nominal Effect” Rule Means

    The ERC nominal effect refers to a regulatory threshold used to determine if a business was significantly impacted by government orders to qualify for the Employee Retention Credit (ERC). If your business remained open during 2020-2021 but operated under mandatory restrictions, this test determines whether those restrictions were substantial enough to create ERC eligibility.

    The more than nominal effect standard is a specific IRS safe harbor established in Notice 2021-20. It applies when government orders modified—but did not completely shut down—an employer’s business operations. The key bright-line test requires demonstrating at least a 10% reduction in the employer’s ability to provide goods or services compared to the same calendar quarter in 2019.

    This 10% threshold can be measured using either the gross receipts from affected operations or the hours of service performed by employees in those operations. Meeting this threshold allows an eligible employer to treat a quarter as partially suspended even without experiencing a significant decline in overall revenue.

    Here’s a practical example: A restaurant operating under a state capacity order limiting indoor seating to 50% documented a 12% reduction in table turns and corresponding revenue compared to Q2 2019. Because the reduction exceeded 10% and was directly caused by the governmental order, the restaurant satisfied the more than nominal effect test for that quarter.

    Minor modifications, such as requiring masks, are explicitly excluded and deemed not to have a more than nominal effect on operations. The test focuses on measurable operational restrictions, not general safety protocols.

    A professional employee is seated at a desk, meticulously reviewing financial documents and calculations related to employer's business operations, including aspects such as gross receipts and qualified wages for the employee retention credit (ERC). The workspace is organized, with papers and a calculator present, reflecting the importance of accurate financial assessment in light of governmental orders impacting business operations.

    Suspension Test Overview: How Nominal Effect Fits into ERC Eligibility

    To be eligible for the ERC, employers must qualify through one of two primary pathways for 2020 and the first three quarters of 2021:

    1. Gross receipts decline test – A significant decline in total gross receipts compared to 2019 (50% for 2020; 20% for 2021)
    2. Full or partial suspension test – Operations fully or partially suspended due to COVID-19 government orders

    The nominal effect analysis falls under the partial suspension pathway. It applies specifically when business operations continued but under restrictive modifications imposed by an appropriate governmental authority.

    An employer satisfies the suspension test for the Employee Retention Credit (ERC) if they experience a full or partial suspension of operations due to government orders limiting commerce, travel, or group meetings related to COVID-19. These orders must be mandatory directives—not mere guidance or recommendations.

    Qualifying orders can originate from:

    • Federal agencies
    • State governments
    • County or municipal authorities
    • Local health department mandating specific operational changes

    The relevant time frame covers orders in effect during any calendar quarter in 2020 or Q1-Q3 2021. Orders affecting Q4 2021 have different eligibility rules for most employers, with exceptions for recovery startup business entities.

    To be eligible under the suspension test, an employer must demonstrate that they were more than nominally impacted by the suspension or modification of operations, which can be subjective and varies by circumstances. Eligibility determination for the ERC requires companies to analyze whether their operational shutdowns were substantial, with specific operational impacts measured to establish qualification for the credit.

    Documentation requirements include:

    • The specific governmental order (with effective dates)
    • When the order applied to the employer’s operations
    • How operations were impacted
    • The quantitative impact supporting the nominal effect or nominal portion analysis

    “Nominal Portion” vs. “Nominal Effect”: Two Related but Different ERC Concepts

    IRS Notice 2021-20 provides two safe harbors for demonstrating eligibility under the suspension test: the ‘more than nominal portion’ test and the ‘more than nominal effect’ test, each applicable in different scenarios of operational impact. These tests are frequently confused, but applying the wrong one can undermine your entire ERC position.

    The “More Than Nominal Portion” Test

    The more than nominal portion test applies when part of an employer’s operations have been suspended by a government order, and eligibility for the ERC is determined if the suspended operations represent more than a nominal portion of its business.

    This test measures whether a suspended line of business, department, or location represented at least 10% of:

    • The employer’s total gross receipts in the same 2019 quarter, OR
    • Total employee hours in the same 2019 quarter

    For example, if a hotel’s conference and events division was completely shut down by a state order prohibiting group meetings, and that division generated 15% of 2019 revenue, the nominal portion test would be satisfied.

    The “More Than Nominal Effect” Test

    The more than nominal effect test is applicable when no portion of the employer’s operations have been suspended, but rather modified, and it requires a 10% or more reduction in the employer’s ability to provide goods or services to qualify for the ERC.

    This test applies when operations continued under restrictions rather than being shut down entirely.

    Side-by-Side Comparison

    Consider a restaurant business operating during COVID-19:

    ScenarioApplicable TestAnalysis
    Indoor dining completely closed by order; only takeout continuesNominal PortionDid indoor dining represent 10%+ of 2019 gross receipts or hours?
    Indoor dining remains open but with 6-foot spacing requirementsNominal EffectDid spacing reduce the ability to offer indoor dining service by 10%+ vs. 2019?

    IRS Notice 2021-20 Q&A 11 and Q&A 17 provide additional guidance on these distinctions. The critical point: these tests are not interchangeable and apply to distinct scenarios based on whether operations were suspended or modified.

    How the 10% “More Than Nominal Effect” Safe Harbor Works

    The 10% Threshold for Eligibility indicates that businesses must demonstrate a government order caused at least a 10% reduction in their ability to provide goods and services, often measured by revenue or employee hours compared to 2019.

    The IRS provides two alternative measurement methods:

    Method 1: Gross Receipts Comparison

    This approach compares either the gross receipts from affected operations in the claim quarter to the same calendar quarter in 2019.

    Step-by-step process:

    1. Identify the specific portion of operations affected by the government order
    2. Calculate that portion’s gross receipts for the relevant 2019 quarter
    3. Calculate the same portion’s receipts for the 2020/2021 quarter under restrictions
    4. Determine if the reduction attributable to the order is at least 10%

    Example calculation:

    An events venue had food or beverage sales from its catering division totaling $1,200,000 in Q2 2019. Due to a local official imposing capacity limits on gatherings, Q2 2020 catering receipts dropped to $1,050,000.

    • Reduction: $150,000 ÷ $1,200,000 = 12.5%
    • Result: Exceeds 10% threshold; qualifies as more than nominal effect

    Method 2: Hours of Service Comparison

    This method calculates service hours performed by employees in the affected operations.

    Step-by-step process:

    1. Identify total employee hours devoted to affected operations in the 2019 quarter
    2. Calculate service hours for the same operations under restrictions
    3. Determine if the reduction in hours is at least 10%

    Example calculation:

    A security service company had employees perform 8,000 service hours at client sites in Q2 2019. Due to building occupancy restrictions ordered by the local health department, Q2 2020 on-site hours dropped to 7,100.

    • Reduction: 900 ÷ 8,000 = 11.25%
    • Result: Exceeds 10% threshold; qualifies under hours test

    Critical Requirements

    The safe harbor measurement must:

    • Use the same calendar quarter in 2019 as the baseline
    • Document causation between the specific order and the reduction
    • Be supported with contemporaneous records, not estimates created after the fact
    • Reflect facts and circumstances unique to the employer’s situation

    Courts have clarified that the 10% threshold operates as a safe harbor—automatically qualifying employers who meet it—rather than an absolute barrier that denies all employers falling below it. However, claiming eligibility below 10% requires substantially stronger documentation and faces higher audit risk.

    Real-World ERC Nominal Effect Examples by Industry

    The nominal effect standard is highly fact-specific. These industry examples illustrate how different businesses might establish eligibility.

    Restaurant Example

    A sit down service restaurant operated under a state order limiting on site dining to 25-50% of normal capacity during Q2 and Q3 2020.

    Analysis:

    • Q2 2019: 100 seats with 90% average utilization, generating $450,000 in dine-in revenue
    • Q2 2020: Limited to 50 seats under capacity order, generating $370,000
    • Reduction: 17.8% decline directly attributable to the capacity restriction

    The restaurant could continue comparable operations at reduced scale, but the government-ordered modification created a documentable more than nominal effect. The employer qualifies for the entire calendar quarter the order remained in effect.

    Manufacturing Example

    A county order required staggered shifts and workstation spacing in manufacturing facilities, with enforcement by the occupational safety and health administration.

    Analysis:

    • Q2 2019 production: 10,000 units per week with standard workstation density
    • Q2 2020 production: 8,800 units per week due to spacing and shift requirements
    • Reduction: 12% drop in output capacity

    The manufacturer documented that operating hours remained consistent, but production efficiency declined due to the mandated modifications. This satisfies the nominal test for affected quarters.

    The image depicts a manufacturing floor where several workers are stationed at spaced workstations, actively engaged in their tasks. This setup highlights the importance of employee retention credit and the operational adjustments essential businesses have made to comply with local health department guidelines while maintaining productivity.

    Medical/Dental Practice Example

    A state order postponed elective procedures while allowing urgent care visits to continue. Many essential businesses in healthcare experienced this partial suspension pattern.

    Analysis:

    • Q2 2019: 1,200 procedure hours (800 elective, 400 urgent/emergency)
    • Q2 2020: 500 procedure hours (elective suspended, only urgent care continued)
    • Hours reduction: 58% decline in service hours performed

    This practice clearly exceeded the 10% threshold. Even after elective procedures resumed, the employer f’s business operations remained restricted for the portion of the quarter the order was in effect.

    Professional Services Example

    A law firm faced building occupancy limits restricting office access to 25% capacity, ordered by the appropriate governmental authority.

    Analysis:

    • Q2 2019: 80% average office occupancy with 2,000 client-facing hours
    • Q2 2020: 25% occupancy cap with significant shift to remote work

    This scenario presents challenges. If the firm’s essential workers could continue comparable operations through telework—conducting client meetings, preparing documents, and appearing in virtual court—establishing a 10% reduction becomes difficult.

    Professional services firms must carefully measure whether occupancy restrictions actually reduced their ability to provide services or simply changed where those services were delivered. Non-essential businesses in this category had clearer paths to eligibility when orders fully prohibited certain activities affecting a portion of the business.

    Documentation and Audit Readiness for ERC Nominal Effect Claims

    The IRS maintains an extended assessment period—generally five years for 2021 claims filed on Form 941-X—and has made ERC compliance a priority examination area. Employers claiming nominal effect positions should expect detailed scrutiny.

    Essential Documentation Checklist

    Primary source materials:

    • Copies of specific government orders with effective dates and jurisdictions
    • Executive orders, public health directives, and official proclamations
    • Documentation showing when orders were lifted or modified

    Implementation evidence:

    • Internal communications implementing the orders
    • Management memos documenting operational changes
    • Contemporaneous emails discussing the further governmental order impact

    Financial support:

    • 2019 baseline receipts for affected operations
    • 2020/2021 quarter receipts under restrictions
    • Spreadsheets showing 10% calculations with source data and formulas
    • Management sign-offs on the analysis

    Operational evidence:

    • Capacity reports and production schedules
    • Reservation systems showing reduced covers (restaurants)
    • Units produced per labor hour metrics (manufacturing)
    • Employee hours by function/department

    Alignment Requirements

    Employers should ensure:

    • Each affected quarter ties to specific orders with documented effective dates
    • The order actually restricted operations during the claimed period (not just when the pandemic generally existed)
    • ERC conclusions are consistent with GAAP financial statement positions
    • The employer relied on treasury regulations and IRS guidance appropriately

    The ERC, classified as a government grant under GAAP, should be recognized as income once reasonable assurance exists that the entity complies with the conditions required for the credit. Coordinate with finance teams to ensure consistency between ERC positions and ASC 740 disclosures.

    The image depicts an organized filing system featuring labeled folders and neatly arranged documents, which likely include important records related to employee retention credit and business operations. This structured setup facilitates easy access to essential information, including employer's total gross receipts and qualified wages, crucial for navigating governmental requirements.

    Common ERC Nominal Effect Mistakes and Risk Areas

    Overly aggressive interpretations of the nominal effect standard represent a primary reason the IRS has highlighted ERC compliance risks. Many claims filed between 2022-2025 are now under examination.

    Frequent Errors

    Relying on general pandemic conditions: Citing “COVID-related disruptions” without identifying a specific governmental order applicable to the employer’s operations fails the causation requirement. The analysis must trace impact to particular mandates.

    Assuming any inconvenience equals 10% impact: Enhanced cleaning protocols, mask requirements for requiring employees, or voluntary safety measures typically do not create more than nominal effect without measurable operational restrictions. The IRS explicitly excludes minor modifications from eligibility.

    Failing to separate COVID impacts from market factors: A business experiencing 15% revenue decline due to consumer hesitancy—but facing no actual government-ordered restrictions—should not claim nominal effect. The test measures reduction in ability to provide services, not reduction in demand.

    Double-counting wages: Some employers claim the same qualified wages paid under both the gross receipts test and a nominal effect theory without clear separation. Not all wages can support both positions simultaneously. Only wages meeting specific criteria qualify, and the analysis must identify which quarters and which wage categories apply to each test.

    Consequences of Erroneous Claims

    Incorrect ERC claims can trigger:

    • Treatment as underpayment of Social Security and Medicare taxes
    • Interest accruing from the original due date
    • Potential penalties for erroneous claims or fraud
    • Requirement to amend income tax return positions

    Claiming the ERC based on operational impacts requires businesses to reduce their wage deduction on their income tax returns for the year the wages were paid. The ERC credit amount must reduce the business’s wage deduction, effectively increasing its taxable income for the year in which the credit is received.

    Employers should work with qualified ERC advisors before filing Form 941-X, especially when eligibility depends heavily on the nominal effect safe harbor.

    Why Choose Our Firm for ERC Nominal Effect Analysis

    Our firm specializes in defensible, audit-ready ERC positions rather than aggressive, one-size-fits-all claims that collapse under IRS examination. We focus on accuracy over speed.

    Our Expertise

    We bring specific experience to ERC nominal effect analysis:

    • Review of 2020-2021 quarters across manufacturing, hospitality, healthcare, and professional services
    • Deep familiarity with IRS Notices 2021-20, 2021-23, 2021-49, and current enforcement priorities
    • Understanding of how the employee retention tax credit interacts with other COVID-era relief programs
    • Focus on creating documentation packages that withstand scrutiny

    Our Process

    We approach each engagement systematically:

    1. Initial eligibility screening – Identify potential qualification pathways under Internal Revenue Code Section 3134 and related provisions
    2. Order-by-order analysis – Document specific government mandates applicable to your operations
    3. Quantitative calculations – Perform 10% threshold analysis using receipts or hours methodology
    4. Written summaries – Provide detailed memoranda for IRS review and audit defense

    We also coordinate ERC positions with your CPAs and auditors to align with financial reporting requirements under GAAP. This prevents conflicts between your refundable tax credit claims and prior filings.

    If you previously filed for the employee retention credit ERC and have concerns about your nominal effect analysis, or if you’re considering a claim and need guidance, we can help you establish eligibility properly.

    Schedule a consultation to discuss your specific situation and receive an independent nominal effect review.

    FAQs: ERC Nominal Effect and Partial Suspension

    These frequently asked questions address common concerns about the nominal effect standard and partial suspension eligibility.

    Do minor operational changes like extra cleaning or optional masking qualify as “more than nominal effect”?

    Typically not. The IRS explicitly states that minor modifications do not satisfy the threshold. To qualify, employers must demonstrate a measurable 10% reduction in ability to provide goods or services resulting from a mandatory government order—not voluntary safety protocols.

    How long is a business considered partially suspended under a government order?

    Only for the period during which the qualifying government order remains in effect and causes more than nominal effect on operations. Once an order is lifted or the employer can continue comparable operations in the normal course of business without restriction, eligibility for that quarter portion ends. A business may be partially suspended for only part of a calendar quarter.

    Can supply chain disruptions satisfy the nominal effect test?

    Only in limited cases where the disruptions are directly traceable to government orders affecting suppliers. If a government order shut down a critical supplier’s operations, and that shutdown reduced your ability to provide services by 10%+, eligibility may exist. However, general supply chain challenges caused by market conditions—rather than specific orders—do not qualify.

    Can remote-capable businesses like software firms qualify under nominal effect?

    It’s possible but difficult. If telework allows substantially comparable operations to continue, demonstrating a 10% reduction in ability to provide services becomes challenging. These businesses must show specific operational functions that could not continue remotely and measure the impact of those restrictions against 2019 baselines.

    What’s the difference between “qualified wages” and “qualified health plan expenses” for ERC purposes?

    Qualified wages are wages paid to employees during eligible quarters. Qualified health plan expenses are allocable health plan costs for those same employees. Both can be included in the ERC calculation, but the total credit is subject to per-employee caps ($5,000 for 2020; $7,000 per quarter for 2021).

    Conclusion and Next Steps

    The ERC nominal effect safe harbor offers a pathway to substantial tax credits for businesses that operated under government restrictions during 2020 and early 2021. The key requirements: a specific governmental order, documented impact on your operations, and a demonstrable 10% or greater reduction in your ability to provide goods or services compared to 2019.

    Properly applying this standard can unlock significant credits through qualified wages for eligible quarters. However, weak or undocumented claims expose employers to IRS examination, potential penalties, and required amendments to income tax returns.

    To position your business correctly:

    1. Gather your 2019-2021 financial data for affected operations
    2. Compile copies of all applicable government orders with effective dates
    3. Calculate gross receipts or hours reductions using consistent methodology
    4. Consult with a specialist to validate your analysis before filing or amending payroll tax returns

    The stakes are too high for guesswork. Contact our firm for a tailored ERC review focused on accurate eligibility determination, compliant calculations, and strong audit defense. Reach out today to discuss your specific situation.

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