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Retirement plan administration training is easy to buy badly. Someone inherits a pension plan and takes a 401(k) course because that is what everyone has heard of. Someone else processes loans and distributions all day and takes a broad program when the gaps are narrow and specific. Both finish the course and still feel unprepared, because the training matched the title of the job rather than the plan and the work.

This guide sorts the retirement programs on Payroll Training Center ...

"401(k) plan administrator" is a job title, a legal role and a line of business, and people searching the phrase usually mean one of the three without realizing the other two exist. A business owner may be looking for a firm to run the plan. A payroll specialist may have just been told the plan is now theirs. A benefits analyst may be eyeing a move to a third-party administrator. This guide is for the second and third groups: people who want to do the work.

The short version is that ...

Most RMD content is written for the account owner: how much to take out of an IRA and when. This guide is for the people on the other side of the transaction, the plan administrators, HR and benefits staff, and payroll teams who have to identify who owes a required minimum distribution from an employer plan, get it paid on time, withhold correctly and report it.

The plan's role is not optional. Code section 401(a)(9) is a qualification requirement. A plan that fails to make a ...

Spousal consent is the retirement plan rule that nobody thinks about until a participant dies. A participant names a sibling or an adult child as beneficiary, the form goes into a file, the plan pays out years later, and then a surviving spouse appears with a claim the plan cannot defend because the waiver was never signed, was signed by the wrong person, or was witnessed by someone who was not allowed to witness it. At that point the plan may owe the spouse a benefit it has already paid to ...

A 401(k) loan is approved by the recordkeeper, governed by the plan document and the tax code, and repaid almost entirely through payroll. That last part is where it goes wrong. The loan itself is rarely the problem. The problem is a repayment deduction that stops during a leave and never restarts, a final paycheck that takes the wrong amount, or a repayment that sits in the operating account for two weeks before it reaches the trust.

Our

Late 401(k) deposits are the most common operational failure payroll causes in a retirement plan, and the one that is easiest to prevent and most tedious to fix. The rule itself is short. The correction is not: it involves the Department of Labor's plan asset regulation, a lost earnings calculation, an IRS excise tax return, a disclosure on the plan's annual return, and a decision about whether to use the DOL's correction program or fix it quietly and accept the reporting ...

SECURE 2.0 changed catch-up contributions for higher earners from a participant election into a payroll classification problem. Since the statutory rule took effect and the IRS's administrative transition period ended on December 31, 2025, any catch-up eligible participant whose prior-year Social Security wages from the employer exceed an indexed threshold must make their catch-up contributions as designated Roth contributions. The participant no longer chooses the tax ...

Ask five people at a mid-sized company who the "401(k) plan administrator" is, and you may get five answers: the HR manager, the recordkeeper whose name is on the participant website, the third-party administrator that runs the testing, the payroll provider, or "the company." Only one of those answers is correct in the legal sense, and it is often not the one people expect.

The confusion is not academic. ERISA assigns specific duties, and personal liability, to specific roles. When a ...

Every year, a traditional 401(k) plan has to prove that it does not favor its highest-paid employees. The proof is a set of annual nondiscrimination tests, and the most familiar of them, the ADP and ACP tests, the top-heavy test and the coverage test, are run by the plan's third-party administrator or recordkeeper. But the tests are only as good as the data they run on, and nearly all of that data comes from payroll.

That is why the people who know the most about why a plan failed ...

A safe harbor 401(k) trades a guaranteed employer contribution for relief from the annual ADP test on employee deferrals and, if the match is designed correctly, the ACP test on matching contributions. That trade is written into the Internal Revenue Code in two places: section 401(k)(12) for the traditional safe harbor and section 401(k)(13) for the qualified automatic contribution arrangement, or QACA.

Within those two sections there are four common designs: the basic

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Most late Form 5500 filings are not caused by anyone deciding to ignore the deadline. They happen because the filing sits between three parties who each assume someone else is watching the calendar: the employer, the third-party administrator who prepares the return, and the auditor whose report a large plan has to attach. When the audit runs long or a census arrives late, the due date passes without anyone filing the one form that would have bought more time.

That form is ...

There are three versions of the annual return for a retirement plan, and choosing the wrong one is not a formatting problem. A one-participant plan that files a 5500-SF has not filed the return it owes. A small plan that files the short form while holding an asset that disqualifies it has filed an incomplete return. A plan that crosses the 100-participant line without noticing can miss a required independent audit.

The choice comes down to three questions, asked in ...

Most comparisons of retirement plans are written for the business owner deciding which one to adopt: how much can be contributed, how much is deductible, who bears the investment risk. This one is written for the people who have to run the plan once it exists. A 401(k), a traditional defined benefit plan and a cash balance plan look very different from the payroll desk and the benefits office. They need different data, run on different calendars, involve different outside professionals and ...

Form 8955-SSA is the annual registration statement a retirement plan files to report participants who left employment with a vested benefit still in the plan. The IRS passes the information to the Social Security Administration (SSA), which gives it back to those individuals when they apply for Social Security benefits. It is how a former employee, decades later, finds out that a plan from an old job still owes them money.

It is a narrow form, and it is employer-only. Participants ...

Retirement Plan Administration:
What Is a Safe Harbor 401(k)? How It Avoids ADP/ACP Testing9/20/2026

A safe harbor 401(k) is a 401(k) plan that commits the employer to a specific, fully vested contribution for rank-and-file employees. In exchange, the plan is treated as passing the annual nondiscrimination tests on employee deferrals (the ADP test) and, if the match is designed correctly, on matching contributions (the ACP test). In many cases it is also exempt from the top-heavy rules.

That trade is the whole point. A traditional 401(k) plan has to prove every year that highly ...

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