15.2 Average Benefit Percentage Test (ABPT) Mechanics & Calculation

15.2 Average Benefit Percentage Test (ABPT) Mechanics & Calculation

[!NOTE] The Holistic Employer-Wide Benefits Benchmark When an employer maintains a retirement plan that fails the 70% Ratio Percentage Test, passing the Nondiscriminatory Classification Test under Treasury Regulation §1.410(b)-4 satisfies only the first half of the compliance journey. Under IRC §410(b)(2)(A)(ii) and Treas. Reg. §1.410(b)-5, the employer must also satisfy the Average Benefit Percentage Test (ABPT). While Prong 1 ensures that the plan's eligibility gate does not arbitrarily discriminate against rank-and-file workers, Prong 2 evaluates the actual economic value of the retirement benefits delivered to those workers.

The statutory philosophy of the ABPT is straightforward yet demanding: an employer is granted the flexibility to maintain restrictive or separate retirement plans for select divisions, provided that, across the employer's entire corporate structure, rank-and-file non-highly compensated employees receive retirement benefits that are, on average, at least 70% as generous as the benefits provided to executive highly compensated employees.

For ASPPA QKA candidates, the ABPT represents one of the most computationally intensive areas of qualified plan compliance. It requires aggregating disparate plan designs, converting defined benefits to contribution equivalents (or vice versa), and calculating individual participant ratios across multi-company payroll censuses.

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The Statutory Standard: The 70% Rule

Under IRC §410(b)(2)(B) and Treas. Reg. §1.410(b)-5(a), a plan satisfies the Average Benefit Percentage Test for a plan year if and only if:

$\frac{\text{Average Benefit Percentage of the NHCE Group}}{\text{Average Benefit Percentage of the HCE Group}} \ge 70.00\%$

To satisfy this numerical standard, the plan administrator must perform a rigorous three-stage calculation:

1. Determine the Testing Group of Employees: Identify all non-excludable employees across the employer's entire controlled group or affiliated service group under IRC §414(b), (c), and (m).
2. Calculate Individual Employee Benefit Percentages (EBPs): Calculate the exact percentage of compensation that each non-excludable employee receives in employer-provided retirement benefits across all qualified plans maintained by the employer.
3. Compute the Group Averages and Test Ratio: Calculate the arithmetic mean of the individual EBPs separately for the NHCE group and the HCE group, and divide the NHCE average by the HCE average.

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Mandatory Plan Aggregation for the ABPT

A critical conceptual distinction tested extensively on the ASPPA QKA exam is the boundary of plan aggregation. Under Treasury Regulation §1.410(b)-7(e), the rules governing what constitutes a "plan" for the ABPT are fundamentally different from the rules governing the Ratio Percentage Test and Prong 1:

+---------------------------------------------------------------------------------------------------+
|                         PLAN SCOPE: RPT / PRONG 1 VS. PRONG 2 (ABPT)                              |
+---------------------------------------------------------------------------------------------------+
|                                                                                                   |
|   RATIO PERCENTAGE TEST & PRONG 1:                                                                |
|   • Tested on a PLAN-BY-PLAN basis (subject to mandatory disaggregation).                         |
|   • 401(k) elective deferrals, 401(m) matching, and profit-sharing portions are DISAGGREGATED.    |
|   • ESOPs must be tested separately from non-ESOPs.                                               |
|                                                                                                   |
|   PRONG 2 (AVERAGE BENEFIT PERCENTAGE TEST):                                                      |
|   • Tested on a MANDATORY AGGREGATED basis across ALL qualified plans of the employer!            |
|   • Must include:                                                                                 |
|       1. All Defined Contribution (DC) Plans (Profit Sharing, Money Purchase, 401(k), 401(m))     |
|       2. All Defined Benefit (DB) Plans (Traditional Pension, Cash Balance Plans)                 |
|       3. All Employee Stock Ownership Plans (ESOPs under IRC §4975(e)(7))                         |
|   • Exclusion: Employee voluntary after-tax contributions are NOT employer-provided.              |
|                                                                                                   |
+---------------------------------------------------------------------------------------------------+

[!IMPORTANT] The ESOP and 401(k) Re-Aggregation Rule: Under Treas. Reg. §1.410(b)-7(c), an ESOP cannot be aggregated with a non-ESOP, and a 401(k) arrangement cannot be combined with a profit-sharing plan to satisfy the Ratio Percentage Test or the Nondiscriminatory Classification Test. However, for purposes of the Average Benefit Percentage Test, Treas. Reg. §1.410(b)-5(d)(3) MANDATES that all plans of the employer—including ESOPs, 401(k) plans, 401(m) plans, and defined benefit plans—be combined together to determine the total employer-provided benefit for each employee!

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Calculating Employee Benefit Percentages (EBPs)

Under Treasury Regulation §1.410(b)-5(d), the individual Employee Benefit Percentage (EBP) is the foundation of the ABPT. It measures an employee's total employer-provided allocations or benefit accruals expressed as a percentage of the employee's compensation:

$\text{EBP}_i = \frac{\text{Total Employer-Provided Benefits for Employee } i}{\text{Employee } i\text{'s IRC Section 414(s) Testing Compensation}}$

1. The Numerator: Total Employer-Provided Allocations

When testing on a contributions basis, the numerator for employee $i$ is the sum of all employer-provided contributions and forfeiture allocations allocated to the employee's accounts across all plans during the testing period:

• Included Allocations:
  • Employer discretionary profit-sharing contributions;
  • Employer matching contributions (both fixed and discretionary);
  • Employee pre-tax elective deferrals under IRC §401(k) and designated Roth 401(k) deferrals under §402A;
  • Safe harbor nonelective and safe harbor matching contributions;
  • Qualified Nonelective Contributions (QNECs) and Qualified Matching Contributions (QMACs);
  • Reallocated forfeitures;
  • ESOP employer stock contributions and debt service allocations;
  • Actuarially equivalent contribution allocations derived from Defined Benefit plan accruals.
• Strictly Excluded Items:
  • Employee voluntary after-tax contributions (these represent participant capital, not employer-provided benefits);
  • Rollover contributions from other plans or IRAs;
  • Trust investment earnings and market appreciation/depreciation;
  • Loan repayments.

2. The Denominator: Testing Compensation under IRC §414(s)

The denominator of the EBP must be a definition of compensation that satisfies IRC §414(s) (e.g., total §415 compensation, Form W-2 Box 1 wages grossed up for elective deferrals, or an alternative definition that passes the §414(s) nondiscrimination ratio test). Furthermore, the compensation must be capped at the statutory IRC §401(a)(17) ceiling ($350,000 for 2025; $360,000 for 2026).

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Testing on a Contributions Basis vs. Benefits Basis (Cross-Testing)

Under Treasury Regulation §1.410(b)-5(d)(4) and Treas. Reg. §1.401(a)(4)-8, an employer may choose to perform the ABPT on either a contributions basis or a benefits basis:

1. Contributions Basis

All plan benefits are converted into equivalent employer contribution allocations:

• Defined contribution plans are already expressed as annual additions/allocations, so their dollar allocations are used directly.
• If the employer maintains a Defined Benefit (DB) pension plan, each participant's annual normal retirement benefit accrual under the DB plan must be converted into an actuarially equivalent annual contribution using standardized interest rate assumptions (generally between 7.5% and 8.5%) and standardized mortality tables specified under Treas. Reg. §1.401(a)(4)-8(c)(2).

2. Benefits Basis

All plan allocations are converted into equivalent annual retirement annuities:

• Defined benefit plans express benefits as annual annuities payable at Normal Retirement Age (NRA), so their accruals are used directly.
• Defined contribution allocations are converted into an equivalent benefit accrual rate (EBAR) by projecting the current-year DC allocation forward to NRA at an assumed interest rate (7.5% to 8.5%) and converting that projected accumulation into a single life annuity payable at NRA.

3. Optional Imputation of Permitted Disparity

Under Treasury Regulation §1.410(b)-5(d)(6), an employer may elect to impute permitted disparity (Social Security integration) under the rules of Treas. Reg. §1.401(a)(4)-7 when calculating individual EBPs. Imputing permitted disparity artificially increases the calculated EBPs of lower-paid employees relative to higher-paid employees, reflecting the employer's contributions to federal Social Security, which frequently helps a borderline plan pass the 70% threshold.

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Determining the Group Average Benefit Percentages

Once individual EBPs are calculated for every non-excludable employee, the administrator must determine the group Average Benefit Percentages:

$\text{ABP}_{\text{NHCE}} = \frac{\sum_{i \in \text{NHCE}} \text{EBP}_i}{\text{Total Non-Excludable NHCEs}}$

$\text{ABP}_{\text{HCE}} = \frac{\sum_{j \in \text{HCE}} \text{EBP}_j}{\text{Total Non-Excludable HCEs}}$

+---------------------------------------------------------------------------------------------------+
|              CRITICAL REGULATORY MANDATE: THE TREATMENT OF NON-BENEFITING EMPLOYEES               |
+---------------------------------------------------------------------------------------------------+
|                                                                                                   |
|   Under Treas. Reg. §1.410(b)-5(c), the group Average Benefit Percentage is the arithmetic        |
|   average of the EBPs of ALL non-excludable employees in that group, WHETHER OR NOT BENEFITING!    |
|                                                                                                   |
|   1. Benefiting Employee:                                                                         |
|      • Receives allocations under one or more plans.                                              |
|      • EBP = Total Employer Allocations / §414(s) Comp (e.g., $6,000 / $60,000 = 10.0%).          |
|                                                                                                   |
|   2. Non-Benefiting Employee:                                                                     |
|      • Excluded from all plans, fails last-day rule, or defers 0% in a non-safe harbor 401(k).    |
|      • EBP = 0.00%.                                                                               |
|      • MUST BE INCLUDED IN THE DENOMINATOR!                                                       |
|                                                                                                   |
|   VIOLATION WARNING: Excluding non-benefiting zero-percent employees from the denominator         |
|   illegally inflates the NHCE average and constitutes a catastrophic testing error!               |
|                                                                                                   |
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The Mathematical Trap: "Average of Ratios" vs. "Ratio of Sums"

A classic testing error on the ASPPA QKA examination is calculating the group ABP using the Ratio of Sums rather than the regulatory Average of Ratios:

• The Incorrect "Ratio of Sums" Approach: $\text{Incorrect ABP} = \frac{\text{Total Contributions Allocated to the Entire NHCE Group}}{\text{Total Compensation of the Entire NHCE Group}}$
• The Mandated "Average of Ratios" Approach: $\text{Correct ABP} = \frac{1}{N} \sum_{i=1}^{N} \left( \frac{\text{Contribution}_i}{\text{Compensation}_i} \right)$

The Treasury Regulations strictly mandate the Average of Ratios method (averaging individual employee percentages). The Ratio of Sums method weights high earners disproportionately within the group and is legally invalid for ABPT compliance!

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Step-by-Step Worked Mathematical Multi-Plan Case Study

Apex Industrial Holdings operates two distinct operating divisions and maintains two separate qualified retirement plans:

• Plan A (Executive & Management Plan): A 401(k) profit-sharing plan covering only salaried management staff.
• Plan B (Plant Operations Plan): A discretionary profit-sharing plan covering hourly plant personnel.

Plan A fails the Ratio Percentage Test because it covers 100% of HCEs but only 20% of NHCEs (Ratio % = 20.00% / 100.00% = 20.00%). Plan A satisfies Prong 1 under the facts-and-circumstances safe harbor rules. The TPA must now perform the Average Benefit Percentage Test (Prong 2) across all non-excludable employees of Apex Industrial Holdings.

Census and Plan Allocation Data:

Apex has 13 non-excludable employees: 3 HCEs and 10 NHCEs.

[!NOTE] Notice that NHCE 9 and NHCE 10 work in an excluded administrative pool and participate in neither Plan A nor Plan B. Because they are non-excludable employees of the employer, they MUST be included in the ABPT census with total contributions of $0 and an EBP of 0.00%!

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Step-by-Step Calculation:

Step 1: Calculate the HCE Group Average Benefit Percentage

Sum the individual EBPs of the 3 HCEs and divide by 3: $\sum \text{EBP}_{\text{HCE}} = 10.00\% + 10.00\% + 8.00\% = 28.00\%$ $\text{ABP}_{\text{HCE}} = \frac{28.00\%}{3} = \mathbf{9.3333\%}$

Step 2: Calculate the NHCE Group Average Benefit Percentage

Sum the individual EBPs of all 10 non-excludable NHCEs (including NHCE 9 and 10 at 0.00%) and divide by 10: $\sum \text{EBP}_{\text{NHCE}} = 10.00\% + 10.00\% + 8.00\% + 8.00\% + 8.00\% + 8.00\% + 8.00\% + 8.00\% + 0.00\% + 0.00\% = 68.00\%$ $\text{ABP}_{\text{NHCE}} = \frac{68.00\%}{10} = \mathbf{6.8000\%}$

Step 3: Compute the ABPT Test Ratio

Divide the NHCE group average by the HCE group average: $\text{ABPT Ratio} = \frac{\text{ABP}_{\text{NHCE}}}{\text{ABP}_{\text{HCE}}} = \frac{6.8000\%}{9.3333\%} = 0.72857 = \mathbf{72.86\%}$

Step 4: Compare Against the 70% Statutory Benchmark

$\mathbf{72.86\%} \ge \mathbf{70.00\%} \implies \mathbf{PASS!}$

Conclusion: The plan satisfies the Average Benefit Percentage Test under Treas. Reg. §1.410(b)-5. Because Plan A has now satisfied both Prong 1 (Nondiscriminatory Classification) and Prong 2 (ABPT), Plan A successfully satisfies IRC §410(b) minimum coverage through the Average Benefits Test!

What If the TPA Committed the Zero-Percent Participant Error?

If the administrator had improperly excluded non-benefiting NHCEs 9 and 10 from the calculation:

• Improper Sum of EBPs = $68.00%$
• Improper Count = 8 benefiting NHCEs
• Distorted NHCE ABP = $68.00% / 8 = 8.50%$
• Distorted Ratio = $8.50% / 9.3333% = 91.07%$

While the plan passed in this scenario anyway, in many borderline plans, omitting non-benefiting NHCEs creates a fraudulent false pass that will result in total plan disqualification upon IRS audit!

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Common ASPPA QKA Exam Traps

• Exam Trap 1: The Ratio of Sums Calculation Error: Exam questions often provide total payroll and total contributions for the HCE and NHCE groups and tempt candidates to divide total contributions by total pay. The law mandates averaging the individual percentages (Average of Ratios).
• Exam Trap 2: Excluding Zero-Percent Employees from the Group Denominator: Candidates often calculate the average benefit percentage using only employees who actually received an allocation. Every non-excludable employee who received $0 must be included with an EBP of 0.00%.
• Exam Trap 3: Disaggregating Plans for the ABPT: While 401(k), 401(m), and ESOP portions must be disaggregated for the Ratio Percentage Test and Prong 1, all qualified plans of the employer MUST be aggregated together for the ABPT.
• Exam Trap 4: Including Voluntary After-Tax Contributions: Exam data will list employee after-tax contributions alongside employer matching and elective deferrals. After-tax contributions under IRC §401(m) are participant contributions and must NEVER be included in the employer-provided numerator for the ABPT!
• Exam Trap 5: Testing on Inconsistent Plan Years: When aggregating plans with different plan years for the ABPT, the employer must apply the regulatory rules of Treas. Reg. §1.410(b)-5(d)(5), testing plan years that end within the same calendar year. Candidates often fail to align testing periods.