How most firms are still performing 401(k) audits — and what modern workflows are changing
Every spring, employee benefit plan audit teams feel the same familiar pressure: too many plans, not enough time, and workflows that still rely heavily on manual preparation, reconciliation, and repeated cleanup work.
After conversations with CPA firms across the country — from regional practices to national specialists — a consistent pattern emerges. The audit framework itself is generally sound. The inefficiencies happen inside the workflow.
Too much time is spent reformatting reports, rebuilding schedules, validating incomplete data, and repeating procedures across multiple workpapers before meaningful audit work can even begin.
And in many firms, these inefficiencies have become so normalized that they are simply viewed as part of busy season.
For most firms, the EBP audit season begins with the same bottleneck: waiting on the client.
Staff send PBC requests and wait for census files, payroll reports, trust statements, and supporting documentation to arrive in a usable format. Sometimes the files come in cleanly. Often they do not.
One client sends a clean Excel export. Another sends a 60-page PDF. Another provides a census that does not reconcile to payroll records or what was submitted to the TPA for nondiscrimination testing.
Before substantive testing even begins, teams are often spending hours:
This setup work rarely shows up clearly in engagement budgets, but it consistently consumes time early in the audit and creates downstream delays when issues surface later during fieldwork.
At firms without standardized intake processes, every engagement starts differently depending on the client, payroll provider, or recordkeeper involved. The result is significant variability before the audit work itself even begins.
One of the most universally time-consuming tasks in EBP audits — and one that often receives surprisingly little attention — is trial balance preparation.
Many firms are still manually pulling balances from trust reports, entering figures into engagement software, and reconciling activity across multiple supporting schedules. The complexity increases further when recordkeepers separate information across several reports or structure investment activity differently from plan to plan.
What’s rarely discussed is how often this same work gets repeated throughout the engagement.
The balances staff reconcile into the trial balance are often tied again in the Form 5500 reconciliation, tied again in investment testing, and sometimes annotated again directly on the trust statement itself. Contribution totals may be reconciled at the plan level, participant level, and again in separate roll-forward schedules.
Individually, each step may seem reasonable. Together, they create a significant amount of duplicated effort across the engagement lifecycle.
Over time, many firms have built workflows around repeatedly validating the same information across different sections of the file rather than designing the workflow around consistency and centralized support.
Most EBP audit files were not designed all at once. They evolved gradually over time.
Additional documentation gets added after peer review comments, internal methodology updates, reviewer preferences, or legacy processes that were never formally reevaluated. Rarely are older procedures revisited holistically to determine whether they still provide meaningful value relative to the time required to prepare and review them.
The result is engagement files that often contain:
None of these procedures are necessarily incorrect. The issue is that many were added independently over time without intentionally designing the overall workflow around efficiency, consistency, or scalability.
As these layers accumulate, review complexity increases and engagement execution becomes more difficult to standardize across teams.
Most firms understand the importance of reviewing SOC reports and evaluating user entity controls. The challenge is that the review process itself often becomes heavily documentation-driven rather than conclusion-driven.
Many teams work through lengthy checklists, extract control language into separate memos, and document CUECs across multiple workpapers. But the conclusions from the SOC review do not always meaningfully influence the rest of the engagement.
Firms may conclude that reliance can be placed on controls, yet testing approaches, workflows, and sample sizes remain unchanged. Subservice organizations may receive only limited evaluation even when their functions directly impact areas under audit.
This creates a significant amount of documentation work without fully integrating the SOC review into the operational flow of the engagement.
At the same time, peer review findings in this area continue to surface not because firms lack technical knowledge, but because documentation quality and workflow consistency vary significantly across engagement teams.
If there is one area where workflow inconsistency and documentation gaps most commonly appear, it is distribution testing.
Distributions involve multiple layers of evaluation:
Most firms are performing these procedures. The issue is often whether the workpapers consistently demonstrate what was actually validated during testing.
In practice, many firms obtain supporting documentation and note that it was reviewed, but stop short of clearly documenting:
This is rarely a technical knowledge problem. More often, it is a workflow and standardization problem. If workpapers do not consistently guide staff toward documenting specific conclusions, variation naturally develops across engagements and reviewers.
Perhaps the most fundamental challenge is not any single procedure. It is the lack of consistency across the engagement lifecycle.
Most firms have templates, audit programs, and documented methodologies. But in practice, engagement execution often varies significantly across offices, reviewers, and engagement teams.
That variation creates operational friction:
The firms creating the greatest operational efficiency are typically the firms reducing variation across the engagement lifecycle.
They are standardizing:
The result is not simply faster preparation. It is more consistent audit execution across the entire EBP practice.
The most effective EBP audit technology is not attempting to replace auditor judgment. It is reducing the amount of manual setup work that occurs before auditors can begin higher-value procedures.
Much of the improvement happening across firms today centers around a few operational areas.
Rather than relying on clients to determine which reports to provide, firms are implementing more structured intake processes with provider-specific instructions and standardized export requirements.
This reduces:
When payroll and recordkeeper data can be standardized and compared consistently, firms reduce the amount of time spent manually building contribution schedules and investigating variances across spreadsheets.
This allows teams to focus more on analyzing exceptions rather than assembling data manually.
One of the defining frustrations of EBP audits is that every provider structures data differently.
Firms are increasingly prioritizing consistency regardless of which recordkeeper or payroll provider sits underneath the plan. Standardized outputs reduce reviewer variability, simplify training, and make workflows easier to scale across the practice.
Firms are also looking for ways to make SOC reviews more operationally useful rather than purely checklist-driven.
More standardized approaches to documenting control objectives, deviations, and CUECs help improve consistency while reducing repetitive administrative work throughout the engagement.
The firms seeing the greatest efficiency gains are not necessarily changing the audit itself. They are reducing the amount of manual setup, reconciliation, and duplicated work required before substantive testing can begin.
That shift starts upstream.
More firms are focusing on standardized intake processes, cleaner datasets, consistent workpapers, and workflows that scale across engagement teams and recordkeepers. The goal is not to remove auditor judgment. It is to reduce operational friction so teams can spend more time on analysis, risk assessment, and review quality.
As firms continue facing staffing pressure, compressed timelines, and growing review expectations, workflow consistency and data readiness are becoming increasingly important operational advantages.
For firms thinking more deeply about these challenges, our white paper, Auditing Beyond Spreadsheets: Why Complete and Accurate Data Is the New Standard, explores the role data completeness plays in audit quality, efficiency, and standardization across the engagement lifecycle.
