A plan document operational failure almost never begins with a dramatic mistake. It begins quietly, when your written plan document says one thing, your payroll and recordkeeping practice does something slightly different, and the notices your participants receive describe a third version of the plan. Each piece looks defensible on its own. Read side by side, they are three descriptions of three different plans — and that gap is where most audit findings, corrections and participant complaints originate.
For employer plan sponsors, this is not a filing-cabinet problem. Under ERISA, the plan must be administered in accordance with its written terms. When operations drift from the document, the deviation is the failure, regardless of whether anyone was harmed or whether the practice was more generous than the document required.
Why the three sources drift apart
The document, the operation and the communication are usually maintained by three different parties. The document is drafted by a document provider or ERISA counsel and amended occasionally. Operations live in payroll and with the recordkeeper, and they change whenever someone updates a deduction code, a hire-date rule or an eligibility flag. Notices are produced by whoever generates them — often the recordkeeper, sometimes HR from an old template.
Nobody in that chain is responsible for confirming that all three still agree. The plan sponsor is. That responsibility does not disappear because the work is outsourced, which is why 3(16) plan administration and clear delegation matter so much.
The mismatches that show up most often
1. The definition of compensation
This is the single most common operational failure in qualified plans. The document defines plan compensation with specific inclusions and exclusions — bonuses, commissions, overtime, fringe benefits, taxable reimbursements. Payroll then withholds deferrals on whatever the payroll system’s “eligible earnings” field happens to contain. If those two definitions differ by even one pay code, every deferral and every match calculated on that code is wrong, in every payroll period, until someone notices.
2. Eligibility and entry dates
The document sets the service requirement and the entry dates. Practice sometimes lets people in early as a courtesy, or delays entry because HR ran enrollment on a different calendar. Both directions are failures. We covered the mechanics in detail in 401(k) eligibility and entry dates.
3. Automatic enrollment and escalation
The document states the default deferral percentage and the escalation schedule. The notice tells participants a percentage. The payroll file applies a percentage. When the plan is amended and only two of those three get updated, participants are defaulted at the wrong rate — and the notice becomes evidence of the discrepancy. See automatic enrollment notices for what the communication itself has to carry.
4. Match formula and true-up
Whether the match is computed per payroll period or annually, and whether a true-up is required, is a document term. Recordkeeping systems have defaults. If the system default was accepted at conversion and never checked against the document, the plan may owe true-ups it has never funded.
5. Vesting and forfeitures
The vesting schedule, the treatment of service before a break, and what the plan may do with forfeited amounts are all document terms. Forfeiture handling in particular tends to follow habit rather than the document — see how forfeiture accounts must be used.
6. Distribution and loan provisions
Loan limits, the number of loans outstanding, hardship availability and in-service withdrawal ages are written provisions. Participant-facing summaries often lag amendments, so participants request — and administrators approve — transactions the document does not allow.
Why “more generous” is not a safe answer
Sponsors frequently assume that a practice benefiting participants cannot be a problem. It can. Operating more generously than the document is still operating contrary to the document, and correction typically means either amending the plan retroactively (only available in limited circumstances and on specific conditions) or unwinding the benefit. Neither is comfortable, and both are far more expensive than catching the mismatch during a routine review.
A reconciliation you can run this quarter
You do not need an audit to find these gaps. You need one afternoon and three documents open at the same time.
- Pull the current, signed plan document — the base document, the adoption agreement, and every amendment executed since the last restatement. If you cannot produce the signature pages, that is your first finding.
- Print the plan’s key terms onto one page. Compensation definition, eligibility, entry dates, default deferral, match formula and timing, vesting schedule, forfeiture uses, loan and distribution provisions.
- Compare that page to the payroll setup. Ask payroll to list exactly which earning codes feed the deferral and match calculations, and match them line by line to the document’s definition.
- Compare it to the recordkeeper’s plan specifications. Most recordkeepers can produce a plan-parameters or plan-highlights report. Read it as a claim about your plan that must be verified, not as a description of it.
- Compare it to the Summary Plan Description and current notices. The SPD must reflect the plan as amended. If the SPD predates your last amendment, participants are being told something untrue.
- Sample real transactions. Take a handful of new hires, one rehire, one terminated participant with a partial vesting percentage, and one loan. Trace each against the document terms rather than against what the system produced.
- Log every difference — even the ones you think are immaterial — with the source of truth, the observed practice, and the date range affected. Scope is what determines the correction path.
- Decide the fix for each gap: conform operations to the document, or amend the document where an amendment is permissible and appropriate. Document the decision and who made it.
The date range matters as much as the finding. A discrepancy that has run for one payroll period is a small correction; the same discrepancy running since the last restatement is a project. That is the case for a scheduled plan review rather than a discovery during an audit.
Where sponsors get hurt
- The mismatch is found by the auditor, not by you. Self-identified issues generally have better correction options than discovered ones — see retirement plan audit support.
- Nobody kept the amendments. A plan is administered under its written terms; if the signed terms cannot be produced, the plan cannot demonstrate compliance.
- The Form 5500 was signed without reconciling anything. The signature is an attestation. We wrote about this in reviewing the Form 5500 before signing it.
- The correction was made silently. Fixing the payroll code going forward without addressing prior periods leaves the original failure open.
- Payroll changed and nobody told the plan. New pay codes and payroll system conversions are the most reliable source of new compensation-definition failures.
What you can delegate — and what you cannot
You can delegate the reconciliation work, the transaction sampling, the notice production and the correction mechanics to a professional administrator. A 3(16) administrator can own the operating calendar and catch drift before it compounds.
You cannot delegate the decision to adopt or amend a plan document — that is a settlor act belonging to the employer — and you cannot delegate the duty to monitor whoever you hired. Selecting and monitoring your service providers stays with you. The related fiduciary tiers are laid out in our overview of 402(a) fiduciary services.
How Admin316 fits
Admin316 reconciles the document, the operational setup and the participant communications as standard practice, not as an emergency response. And unlike most providers, Admin316 accepts the ERISA 402(a) named-fiduciary appointment in writing — the role most administrators decline. That means the responsibility for administering the plan according to its written terms sits with a party that has read them.
If your document, your payroll file and your last participant notice have never been read side by side, that is the place to start. Book a time with Admin316 and we will walk your plan’s key terms against how it is actually being run.
