Buyers typically pay thousands for a 401(k) audit, with price driven by plan size, complexity, and whether the audit is integrated with compliance testing and Form 5500 preparation. The following covers typical cost ranges and what factors influence pricing, helping readers estimate their budget and avoid surprises.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Audit Fee | $4,500 | $8,000 | $25,000 | Depends on plan size and complexity. |
| Form 5500 Preparation | $1,200 | $2,500 | $6,000 | Includes schedules and risk checks. |
| Compliance Testing (ADP/DEI) | $1,000 | $3,000 | $8,000 | Same auditor or outsourced tests. |
| Preparation Time (Internal) | $0 | $0 | $0 | Staff time not charged by auditor. |
| Delivery & Revisions | $0 | $750 | $2,000 | Reruns after changes. |
| Per-Participant Fees | $2 | $6 | $20 | Common in mid-size plans. |
Assumptions: region, plan size, and complexity vary; numbers reflect U.S. market norms for typical 401(k) plans.
Overview Of Costs
Average total costs for a standard 401(k) audit typically fall between $8,000 and $15,000 for mid-sized plans, with smaller plans often under $6,000 and large, complex plans exceeding $20,000. Costs commonly include the main audit, Form 5500 preparation, and optional compliance testing. When applicable, per-unit pricing may apply per participant, or per hour for unusual scope. The exact mix depends on plan features, the number of participants, and whether the auditor also handles annual disclosures and administrative support.
Cost Breakdown
| Materials | Labor | Equipment | Permits | Delivery/Disposal | Warranty | Contingency | Taxes |
|---|---|---|---|---|---|---|---|
| $0–$500 | $3,000–$9,000 | $0–$1,500 | $0 | $0–$300 | $0–$0 | $500–$3,000 | $0–$1,000 |
Key drivers include plan size and plan type, where small non-multiemployer 401(k) plans tend toward the lower end and large or multi-employer plans drive higher ranges. A looming factor is the complexity of investments, the number of investment options, and whether the plan includes safe harbor features or automatic enrollment.
What Drives Price
Common price drivers include plan size (participants), plan type (governmental vs. private), and scope (audit only vs. audit plus 5500 preparation and compliance testing). Per-participant pricing often appears above a threshold for plans with more than 100 participants. Regional cost variations also influence quotes, as do required audit standards (GAAS vs. SSAE) and whether a single firm handles all related services to reduce coordination time.
Ways To Save
Bundling services with one firm can reduce total costs by 10–20% versus separate engagements. Early planning and providing clean data minimizes discovery time and revision rounds. Some firms offer flat-rate packages for standard plans below a certain size, while others provide tiered pricing based on the number of participants and investment options.
Regional Price Differences
Regional comparisons show notable differences across three markets: Urban centers tend to be higher due to demand and overhead, suburban markets align with national averages, and rural areas may offer lower baseline rates though travel fees can offset savings. Practical deltas often range from ±10% in suburban areas to ±25% in dense urban markets, with large metro areas occasionally exceeding ±30% for highly complex audits.
Labor, Hours & Rates
Labor costs typically dominate the budget, often comprising 60–80% of total pricing depending on data review complexity. Rate ranges commonly fall between $120 and $250 per hour for partners, and $70 to $150 per hour for staff auditors, with total hours ranging from 40–120 hours for mid-sized plans. The minimum hours depend on data quality and whether prior-year work aligns with new filings.
Additional & Hidden Costs
Notable extras can include expedited timelines, additional risk assessments, or scope expansions (e.g., adding a 5500-X filing). Seminars or training materials, extended support after filing, and extra revisions beyond the initial submission may add 5–15% to the overall budget. Travel charges, if applicable, should be clarified upfront.
Real-World Pricing Examples
Three scenario cards reflect typical engagements for different plan sizes and complexities.
Basic Scenario
Plan participants: 30; Single-employer, standard 401(k) with 3–5 options; no ADP/DEI testing required.
data-formula=”labor_hours × hourly_rate”> Labor: 20–28 hours at $120–$180/hr; Materials/Delivery: $0–$600.
Total: $4,800–$8,000; per-participant: $160–$267.
Mid-Range Scenario
Plan participants: 150; Private-sector; includes Form 5500 preparation and basic compliance testing.
Labor: 60–90 hours at $130–$190/hr; Delivery/Disposal: $200–$800; Per-participant fees apply.
Total: $8,000–$15,000; per-participant: $53–$100.
Premium Scenario
Plan participants: 500+; Multi-employer or highly customized investments; includes extensive testing and post-filing support.
Labor: 120–180 hours at $150–$230/hr; Materials/Delivery: $1,000–$2,500; Contingency: $1,000–$4,000.
Total: $20,000–$40,000; per-participant: $40–$80.
Assumptions: region, plan size, data quality, and service scope affect outcomes; quoted ranges reflect typical U.S. market pricing.