The short answer
A failed test does not shut down your plan, invalidate it, or affect most of your employees. It means that for the specific test that failed, the plan discriminated in favor of a defined group, highly compensated or key employees, and that group loses the pre-tax treatment on the affected benefit for that plan year. Everyone else keeps their benefits exactly as they were.
What doesn't change: non-highly-compensated employees. Their pre-tax premiums, FSA elections, and dependent care benefits are unaffected by a failed test, regardless of which test failed or by how much.
Who's actually affected, and how
Only employees who meet the definition used by the specific test that failed, highly compensated employee, key employee, or in some tests, more-than-5% owners. For a full breakdown of those definitions and the dollar thresholds involved, see our Key Employee vs. HCE guide.
For those employees, the benefit amount they received through the plan for that plan year becomes taxable income instead of a pre-tax deduction. In practice that usually means a W-2 correction, and because the amount is now treated as regular compensation, it typically becomes subject to payroll tax (FICA) as well, on both the employee and employer side. This is the real financial consequence of a failed test, not a fine or penalty, but a retroactive change in how specific compensation is taxed.
What a failed test does not mean
- It does not mean the plan itself is illegal or needs to be terminated.
- It does not affect non-highly-compensated employees in any way.
- It is not filed with or reported to the IRS automatically, so it does not by itself trigger an audit.
- It does not mean every test failed, most plans that fail one test still pass the other eight.
Correcting a failed test
What corrective action looks like depends entirely on which test failed. A few common patterns:
- Eligibility test failures usually call for broadening who's eligible to participate, so a more proportionate share of non-highly-compensated employees have access to the benefit.
- Benefits/contribution test failures often mean the amounts highly compensated employees are receiving need to come down relative to everyone else, or participation among other employees needs to go up.
- Concentration test failures (key employees or owners receiving too large a share of total benefits) typically require adjusting elections for that specific group rather than a plan-wide change.
Every result we deliver includes guidance specific to whichever test failed, not a generic "you failed" notice, so you know exactly what changed and what it would take to fix it going forward.
Why timing determines whether you can actually fix it
This is the part that catches employers off guard: once a plan year closes, that year's result is locked in. There's no retroactive fix, only the tax correction described above. The only way to actually prevent a failure, rather than just document one after the fact, is testing early enough in the plan year that there's still time to adjust eligibility or elections. See our guide to testing deadlines and mid-year timing for exactly when that window closes for your plan.
How 125PlanTest.com helps if a test fails
Every engagement includes corrective guidance for any failed test as part of the standard result, not as an upsell. If you test early enough in the plan year to act on the results, we also include a free retest once you've made adjustments, so you can confirm the fix actually worked before the year closes.
FAQ
Does a failed test mean our plan is illegal or has to shut down?
No. A failed nondiscrimination test does not invalidate the plan or require you to stop offering it. It means specific corrective steps apply to a specific group of employees for that plan year. The plan itself continues operating normally.
Which employees are actually affected by a failed test?
Only employees classified as highly compensated or key employees under the specific test that failed. Employees who don't meet those definitions keep their pre-tax benefits exactly as before, with no change to their paycheck or tax situation.
Does the employer get penalized directly by the IRS for a failed test?
Nondiscrimination testing results are not filed with the IRS, so a failed test doesn't trigger an automatic penalty or audit by itself. The practical consequence is administrative and financial, correcting affected employees' taxable income and payroll tax filings, not a direct fine for failing.
Can we fix a failed test after the plan year ends?
No, which is exactly why timing matters. Once a plan year closes, that year's result is final and the only remaining step is the tax correction for affected employees. Testing before year-end, while there's still time to adjust elections or eligibility, is the only way to actually fix a problem instead of just documenting it.