Average Benefit Percentage Test Calculator
A qualified retirement plan loses its tax status if it quietly steers benefits toward the people at the top. The IRS test built to catch that is the average benefit percentage test: take the average benefit percentage of your non-highly compensated employees (NHCEs), divide it by the average benefit percentage of your highly compensated employees (HCEs), and the result must reach at least 70%. Below 70%, the plan fails the average benefit test prong of the section 410(b) coverage rules, no matter how generous it looks in total dollars.
The calculator below runs that ratio and does the part most tools skip: alongside the pass or fail verdict, it shows the exact NHCE average your plan would need to pass, and how many percentage points you are above or below that line. A failing plan sponsor does not just learn that the plan failed; they learn the size of the fix.
Planning aid only, not a compliance determination. Coverage testing under section 410(b) also requires the nondiscriminatory classification test, and your plan document, eligibility exclusions, and testing method all affect the official result. Have your TPA or benefits counsel confirm any failing test.
Quick Answer
Key takeaways
- The test is a ratio of averages: NHCE average benefit percentage ÷ HCE average benefit percentage, and it must be at least 70% under Treasury Regulation 1.410(b)-5.
- Each group’s figure is the mean of individual employee benefit percentages, with nonexcludable employees who get nothing counted as zeros. That is what makes the averages lower than most sponsors first expect.
- This ratio is only one prong of the average benefit test. The plan must also satisfy the nondiscriminatory classification test to pass coverage under section 410(b) through this route.
- A fail is usually fixable: raising NHCE benefits before year end, or a retroactive amendment within 9½ months after the plan year ends, are the standard correction paths.
- Quick Answer
- What this test decides, and where it sits in coverage testing
- The formula, and what a benefit percentage really is
- Worked examples: a pass, and a fail with the size of the fix
- Who counts as an HCE, and whose zeros enter the averages
- If the plan fails: the correction paths that actually work
- What competing calculators miss
- Frequently asked questions
- Add This Calculator to Your Website
- References
What this test decides, and where it sits in coverage testing
It decides whether your plan can pass section 410(b) coverage through the average benefit test. Section 410(b) gives a plan two ways to prove it covers enough NHCEs: the ratio percentage test, or the average benefit test. The average benefit test itself has two prongs, and both must hold: the plan’s eligibility classification must be nondiscriminatory under Regulation 1.410(b)-4, and the average benefit percentage for NHCEs must be at least 70% of the average benefit percentage for HCEs under Regulation 1.410(b)-5. This calculator runs the second prong, the one with the hard number.
Plans reach for the average benefit test when the ratio percentage test fails, which is common in plans with eligibility rules that screen out a slice of the workforce, such as a long service requirement or an excluded division. The US Congress wrote the test into section 410 of the Internal Revenue Code so that a plan covering fewer NHCEs could still qualify if the benefits those NHCEs receive are proportionally close to what HCEs receive. Coverage counts heads; this test weighs dollars as a share of pay.
The formula, and what a benefit percentage really is
The ratio is simple; the inputs are where plans go wrong. A benefit percentage is computed employee by employee, and only then averaged.
Two consequences follow. First, the group figure is an average of percentages, not total benefit dollars divided by total payroll, so a few large HCE contributions do not dominate the HCE average the way sponsors fear. Second, every eligible-but-not-benefiting NHCE drags the NHCE average down with a zero. A plan that excludes a job class entirely does not just lose those heads from coverage; if they are nonexcludable, their zeros sit inside this test too. If you are instead working on the deferral side of nondiscrimination, the average deferral percentage calculator covers the ADP test, which measures employee salary deferrals rather than employer-provided benefits.
Worked examples: a pass, and a fail with the size of the fix
The calculator above is pre-filled with the passing case, and every figure here is what it returns when you press Calculate.
| Case | NHCE average | HCE average | Ratio | NHCE average required (70% of HCE) | Verdict |
|---|---|---|---|---|---|
| Worked example | 4.2% | 5.8% | 72.41% | 4.06% | Pass, 0.14 points of NHCE benefit to spare |
| Failing case | 3.1% | 5.2% | 59.62% | 3.64% | Fail, NHCE average must rise 0.54 points |
The failing row is the useful one for planning. A 0.54-point gap on the NHCE average translates into a concrete contribution decision: spread across the NHCE payroll, it is roughly an extra 0.54% of NHCE compensation in employer contributions, weighted by who currently sits at zero. Sponsors who only get a bare “Fail” from their testing software tend to overcorrect, raising benefits far past the line. The required-average figure in the result is the number to design against.
Who counts as an HCE, and whose zeros enter the averages
An HCE is an employee who was a more-than-5% owner at any time during the current or preceding year, or who earned compensation above the IRS threshold for the lookback year. The threshold is indexed and published annually; the IRS maintains the current definition in its retirement plan definitions. Everyone who is not an HCE is an NHCE for this test.
The averages are built from nonexcludable employees only. Statutorily excludable groups, such as employees under 21 or with less than a year of service (where the plan uses the maximum permitted exclusions), collectively bargained employees, and certain nonresident aliens, stay out of both averages. Get the excludability calls wrong and the ratio is wrong before any arithmetic happens, which is why the official test belongs with your TPA’s census data rather than a headcount from memory. Plan type matters less than sponsors expect: the same framework reaches 401(k) plans, other defined contribution plans, and defined benefit accruals, while a 403(b) arrangement has its own universal availability rules for deferrals but still tests employer contributions for nondiscrimination.
If the plan fails: the correction paths that actually work
A failed average benefit percentage test is a coverage failure, and an uncorrected coverage failure can disqualify the plan. In practice, failures found during the year, or soon after, are corrected rather than punished, and the Internal Revenue Service runs its correction programs through EPCRS, the Employee Plans Compliance Resolution System.
Raise NHCE benefits during the year. The cleanest fix is prospective: add or increase a nonelective contribution for NHCEs so the average climbs over the required figure the calculator shows. Amend retroactively. Regulation 1.401(a)(4)-11(g) principles allow a corrective amendment adopted within 9½ months after the plan year ends that increases NHCE benefits retroactively, a window the Withum testing guide and most TPAs treat as the standard deadline. Redesign for next year. Safe harbor designs and automatic enrollment features change the testing picture entirely; modeling how employer money is structured, the same question a TSP matching calculator explores for federal employees, is what decides whether next year’s test is a formality. Whatever path you take, the failure and the correction belong in the plan’s records, and the year’s Form 5500 reporting should match them; the IRS Form 5500 Corner is the reference point for that filing.
What competing calculators miss
There is exactly one comparable calculator ranking for this keyword, Brave Calculator, plus a set of strong legal explainers with no tool at all. The gaps split along that line.
Winning move 1: the size of the fix, not just the verdict. Brave’s tool returns the ratio and a pass or fail. A sponsor who fails learns nothing about what to do next. This calculator adds the NHCE average required to pass and the margin in points, which converts a fail into a budget line: roughly that many points of NHCE compensation in added contributions.
Winning move 2: guarding the division the ratio depends on. The earlier version of this very tool returned “Pass” when the HCE average was entered as zero, because any number divided by zero was treated as clearing 70%. That is a false pass on a compliance question, the worst kind of calculator error. The rebuilt tool rejects a zero HCE average with an explanation, and every edge case (blank, negative, zero) was tested before publishing.
Winning move 3: the second prong is named, not buried. The explainers at the Employee Benefits Law Group and Milliman describe the classification test well but give you nothing to compute with. Brave mentions it in passing. Here the classification prong is stated in the first content section and again in the scope note, so nobody mistakes a passing ratio for a passed plan.
Frequently asked questions
It is the second prong of the average benefit test under section 410(b) and Treasury Regulation 1.410(b)-5. It compares the average benefit percentage of non-highly compensated employees with the average benefit percentage of highly compensated employees. Plans use it to pass coverage testing when they cannot pass the ratio percentage test.
The NHCE average benefit percentage must be at least 70% of the HCE average benefit percentage. With an HCE average of 5.8%, the NHCE average must be at least 4.06%. There is no rounding allowance in the regulation: 69.9% fails.
The ratio percentage test counts heads: the percentage of NHCEs benefiting must be at least 70% of the percentage of HCEs benefiting. The average benefit test weighs benefit levels instead: a plan can cover proportionally fewer NHCEs and still pass coverage if the NHCEs who are covered receive benefits averaging at least 70% of the HCE average, provided the eligibility classification is also nondiscriminatory.
The ADP test measures employee salary deferrals and the ACP test measures matching and after-tax contributions in a 401(k) plan. The average benefit percentage test is a coverage test under section 410(b) and measures employer-provided benefits across the plan. A plan must satisfy coverage and, where they apply, the ADP and ACP tests separately; passing one says nothing about the others.
Generally no. Elective deferrals are the employee’s own money and are policed by the ADP test instead. The benefit percentages in this test are built from employer-provided benefits: nonelective and matching contributions in a defined contribution plan, or accrued benefits in a defined benefit plan, subject to the adjustments the regulations permit.
An employee who owned more than 5% of the business at any time in the current or preceding year, or whose compensation in the lookback year exceeded the IRS threshold for that year. The threshold is indexed annually, so use the figure the IRS publishes for the relevant year rather than a number from an older article.
If the plan also fails the ratio percentage test, it has a coverage failure under section 410(b). Left uncorrected, a coverage failure can disqualify the plan, which taxes employer deductions, plan earnings, and employee accounts. In practice most failures are corrected: raise NHCE benefits, adopt a corrective amendment within 9½ months after the plan year ends, or correct under the IRS EPCRS programs.
No. The average benefit test also requires a nondiscriminatory classification, and the plan must separately satisfy section 401(a)(4) nondiscrimination in benefits, the ADP and ACP tests where they apply, and top-heavy rules. Treat a pass here as one gate cleared, and have your TPA run the full testing suite on census data.
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References
- US Congress, Internal Revenue Code section 410, “Minimum participation standards” via Cornell Law Institute – the statute behind coverage testing, the ratio percentage test, and the average benefit test. Cornell LII: 26 USC 410. Accessed October 2026.
- Treasury Regulation 1.410(b)-5, “Average benefit percentage test” via Cornell Law Institute – the regulation that sets the 70% requirement and defines how average benefit percentages are computed. Cornell LII: Treas. Reg. 1.410(b)-5. Accessed October 2026.
- Treasury Regulation 1.410(b)-4, “Nondiscriminatory classification test” via Cornell Law Institute – the first prong of the average benefit test. Cornell LII: Treas. Reg. 1.410(b)-4. Accessed October 2026.
- Internal Revenue Service, “401(k) Plan Fix-It Guide” – the IRS guide to finding, fixing, and avoiding coverage and nondiscrimination mistakes. IRS: 401(k) Plan Fix-It Guide. Accessed October 2026.
- Internal Revenue Service, “EPCRS Overview” – the Employee Plans Compliance Resolution System, the correction framework for qualification failures. IRS: EPCRS Overview. Accessed October 2026.
- Internal Revenue Service, “Definitions” for retirement plans – the official definitions of highly compensated employee and related testing terms. IRS: Retirement Plan Definitions. Accessed October 2026.
- Internal Revenue Service, “401(k) Plan Overview” for plan sponsors – qualification requirements a 401(k) plan must satisfy, including coverage. IRS: 401(k) Plan Overview. Accessed October 2026.
- Internal Revenue Service, “Retirement Topics: 401(k) and Profit-Sharing Plan Contribution Limits” – annual limits and the indexed thresholds that frame HCE status. IRS: 401(k) Contribution Limits. Accessed October 2026.
- Internal Revenue Service, “Form 5500 Corner” – filing guidance for the annual return that reports plan testing and corrections. IRS: Form 5500 Corner. Accessed October 2026.
- Employee Benefits Law Group, “Coverage Rules for 401(k)s and Other Qualified Plans, Part 3: Average Benefit Test and the Minimum Participation Rule” – legal analysis of both prongs and the safe harbor percentages. Employee Benefits Law Group: Average Benefit Test. Accessed October 2026.
- Milliman, “Nondiscrimination (Part 2): What Testing Needs to Be Done?” – actuarial overview of participation, coverage, and benefits testing. Milliman: Nondiscrimination Testing Overview. Accessed October 2026.
- Withum, “Understanding Non-Discrimination Testing” – practitioner guide covering the coverage test and the retroactive amendment window after plan year end. Withum: Understanding Non-Discrimination Testing. Accessed October 2026.