Put the plan into the hiring checklist
A founder’s retirement plan may have been established when the company had no employees other than the owner and spouse. Hiring changes the facts that supported that setup. IRS guidance explains that a one-participant 401(k) arrangement loses its owner-only testing advantage when eligible employees must be covered. Contact the plan administrator before the first hire rather than waiting until the annual contribution is being calculated.
Give the administrator the proposed start date, expected schedule, compensation, job status, and information about other businesses the owner controls. The relevant employee population may require more analysis than the payroll list for one company. Ask which service records must be maintained and when eligibility will be determined under the actual plan document and applicable rules. Avoid promising an employee exclusion based on a casual description such as part-time help.
A hypothetical first hire
Assume a consulting owner has a one-participant 401(k) and plans to hire a project manager in March. The owner expects the manager to work thirty hours each week, but demand may increase the schedule later. The business should track actual hours and compensation from the beginning. An informal estimate made during recruiting will not replace the service records the administrator needs for eligibility and testing decisions.
Suppose the owner budgeted $45,000 for personal retirement funding based on the old arrangement. After the hiring review, the administrator presents several compliant plan designs with different employee costs and administration. The owner should compare the complete employer budget, not only whether the owner can still contribute $45,000. A design that supports the desired owner contribution may require employee funding or additional testing work.
Include hiring outcomes in the cash forecast. If the employee starts earlier, receives a raise, or becomes eligible sooner than assumed, the employer’s plan costs may change. The owner should understand which figures are estimates and which are required by the adopted design. Do not treat an illustration as a promise independent of actual payroll and participation.
Ask for a transition plan, not just a new brochure
The administrator should explain whether the existing document can be amended, whether a different arrangement is appropriate, and what deadlines apply. Request a list of notices, enrollment steps, payroll changes, contribution procedures, and filings. The tax preparer should receive the same timeline. A new investment account alone does not establish that the company has adopted and administered the intended plan correctly.
If payroll contributions are involved, test the connection between payroll and the recordkeeper before relying on it. Confirm employee elections, pay codes, funding accounts, and reconciliation responsibilities. Keep employee deferrals, employer contributions, and owner personal cash movements distinct. The owner should know who checks that contributions were actually received and posted to the correct participants.
Maintain the census throughout the year
Keep hire and termination dates, hours, compensation definitions, ownership information, and participation records in a current census. Notify the administrator about rehires, related businesses, acquisitions, or a spouse joining payroll. A year-end spreadsheet reconstructed from memory can omit the precise service details needed to administer the plan.
Review the first year after hiring with actual data. Compare the original illustration with employee eligibility, contributions, and administration fees, and explain significant differences. This article does not determine a particular employee’s eligibility or select a plan for the business. Its practical purpose is to put the retirement administrator into the hiring process early, while the owner can still budget for the full employee population and implement the necessary payroll and document changes on time.
The offer letter should not promise a retirement benefit that the administrator has not confirmed. Coordinate the recruiting message with the adopted plan and enrollment process so the new employee receives accurate expectations. If the employee asks when participation begins, obtain the answer from the actual terms rather than the owner’s memory of a prior employer. Document the communication, identify the administrator who confirmed it, and retain any required notices. A consistent onboarding file helps both the employee and the company understand what was offered and implemented.
Sources & further reading
Consult the original guidance and its effective dates. These references support the educational discussion; their application depends on the specific facts.