What it means
The classification generally turns on two tests. Someone qualifies either by owning more than 5% of the business in the current or prior year, or by earning more than an annually adjusted compensation threshold in the prior year, a figure that has sat in the region of $150,000 in recent years.
The point of the rule is fairness testing. Retirement plans receive generous tax treatment, and in exchange they must show that lower-paid staff benefit meaningfully, not just executives who can afford to save the maximum.
The mechanism is a set of annual nondiscrimination tests comparing average contribution rates for the highly compensated group against everyone else. If the gap is too wide, the plan fails and the employer must fix it, usually by refunding contributions to senior staff or making extra contributions for other employees.
For the individual, the practical effect is an unwelcome cheque in the post. A refund of excess contributions is taxable in the year received and undoes retirement saving the employee thought was already done, which is why senior staff often feel personally penalised by a company-level test failure.
Employers can sidestep the problem by adopting a safe harbour design, which commits the company to a defined matching or non-elective contribution for all eligible staff in exchange for automatic passing of the tests. The cost is a guaranteed contribution; the benefit is certainty, which most finance teams consider a fair trade.
In practice
Real-world examples.
Example
A 60-person marketing agency fails its annual test and refunds $18,000 across five senior staff in March. Two of them ask why nobody warned them, and the finance director introduces a mid-year projection so the following year's problem is spotted in July rather than after the fact.
Example
A newly promoted director crosses the pay threshold and is told her contribution rate will be capped the following year. She redirects the difference into a taxable investment account so her overall saving rate does not fall.
Example
A manufacturing firm with low participation among shop-floor staff adopts a safe harbour matching design costing about $210,000 a year. The finance team accepts the cost because it removes annual refunds for 14 senior employees and lifts overall plan participation from 52% to 81%.
Formula
Calculation
Classification: an employee is highly compensated if prior-year pay exceeded the threshold, or if ownership exceeded 5%. The contribution test then compares average deferral rates, with the highly compensated group's average limited to the lesser of twice the other group's average, or that average plus two percentage points.
Consider an employee paid $180,000 in the prior year against a threshold of $155,000. Since $180,000 is above $155,000, that employee is classified as highly compensated for the current year. A colleague owning 6% of the company qualifies too, even though her salary is only $90,000, because 6% exceeds the 5% ownership test.
Now the plan test. Employees who are not highly compensated defer an average of 4% of pay. The permitted average for the highly compensated group is the lesser of 2 x 4% = 8% or 4% + 2 = 6%, so the limit is 6%.
The highly compensated group actually deferred an average of 7.5%, exceeding the 6% limit by 1.5 percentage points. That group has combined eligible pay of $2,000,000, so the excess to be corrected is 1.5% x $2,000,000 = $30,000. The employer refunds $30,000 across the group, and those refunds are taxable income to the recipients in the year they are paid.Case study
Seen in the real world.
Thornbury Systems is a fictional engineering firm of 240 staff used for this illustrative case study. Its retirement plan has strong take-up among senior engineers and weak take-up on the production floor, where average deferrals sit at 4% of pay.
The plan fails its annual test for the third year running. The highly compensated group, 22 people with combined eligible pay of $2,000,000 in the tested pool, averaged 7.5% against a permitted 6%, producing $30,000 of refunds. Worse than the money is the annoyance, since two senior hires had been promised a plan that "just works" during recruitment.
The finance director models two fixes. Refunds cost little in cash but damage retention among exactly the people the firm cannot replace easily. A safe harbour design with a 4% non-elective contribution costs an estimated $620,000 a year but ends the testing problem permanently and raises retirement saving for every employee. In this illustrative outcome the board approves the safe harbour, treating the extra cost as a retention expense rather than a benefits expense.
Watch out
Common mistakes.
- Assuming the classification is based on this year's pay. The compensation test normally looks at the prior year, so a mid-year pay rise affects next year's status, not the current one.
- Forgetting the ownership route. Someone earning a modest salary can still be highly compensated if their stake in the business exceeds 5%, and family attribution rules can pull in relatives too.
- Treating a failed test as an individual problem. The failure belongs to the plan design and participation levels, so fixing it means changing the plan, not scolding senior employees for saving too much.
Questions
People also ask.
Does being highly compensated mean I cannot contribute to the plan?
No, it only means your contribution rate may be capped by the annual test, and any excess is refunded rather than blocked upfront.
How can an employer avoid these tests altogether?
By adopting a safe harbour plan design with a committed employer contribution, which is the usual route for firms that keep failing.
Is the threshold the same every year?
No, it is adjusted periodically for inflation, so the current figure should always be confirmed before classifying anyone.
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