401k Auditors Near Me | Compare 40+ CPA Firms for 401(k) Audit Services
401(k) auditors are independent CPA firms engaged to perform ERISA-required audits of employer-sponsored retirement plans that meet federal filing thresholds.
These audits are required for certain plans and are conducted in accordance with Department of Labor and IRS reporting standards, including Form 5500 requirements.
The firms listed below specialize in employee benefit plan audits and provide services, including
- 401(k) compliance testing
- Financial statement audit procedures, and
- Regulatory reporting support for plan sponsors across various industries and plan sizes.
401k Auditors Directory
A state-by-state directory of the firms you provided, arranged in a cleaner three-column format with working search, filter, and sort controls on desktop.
Best For 401(k) Audit Provider Search
Compare the largest 401(k) providers and see which companies stand out for fees, plan features, and retirement support.
Compare Providers NowWhen Does a 401(k) Plan Need an Audit?
When a plan becomes a large plan, an audit is usually required.
A plan commonly crosses that line when it has 100 or more participants with account balances at the beginning of the plan year.
New plans are usually measured at year-end for their first filing year. There is also an 80-to-120 participant range rule that can keep some plans in small-plan filing status for a time.
That means the audit requirement can show up in a few different ways:
- The plan grows past the threshold
- First year ends with enough participants
- Plan merges with another plan
- The plan terminates while still large
- A compliance issue draws added regulatory attention
Where Do You Find 401(k) Audit Firms?
Big national firms offer broad resources and deep technical teams. Regional firms often provide a strong balance of cost and specialization.
Smaller local firms can be a good fit for sponsors who want closer communication and lower fees.
Most plan sponsors find firms through one of three paths:
- employee benefit plan audit directories
- state CPA society referrals
- recommendations from TPAs, recordkeepers, or ERISA counsel
In my opinion, the firm does not need a huge brand name to be good, but just needs the right experience.
Types of Audit Firms
| Firm Type | Companies | Pros | Cons |
|---|---|---|---|
| Big Four | Deloitte, EY, KPMG, PwC |
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| National / Mid-Tier | RSM, BDO, Grant Thornton, Crowe, CLA (CliftonLarsonAllen), Moss Adams, etc. |
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| Regional / Local | Banks Finley White (AL), Bennett Thrasher (GA), Purvis Gray (FL), etc. |
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- Top-tier global expertise
- Strong brand recognition
- Extensive ERISA and employee benefits audit specialization
- Deep industry resources and technology tools
- Broad international reach
- High fees
- Less flexible engagement structure
- Often less attention to small/mid-size plans
- More standardized, less tailored service
- Strong ERISA and benefit plan audit experience
- Good balance of cost and expertise
- National footprint with solid resources
- More partner accessibility than Big Four
- Industry-focused teams in many cases
- Still relatively expensive versus regional firms
- Can be less personalized than smaller firms
- Resources may be stretched across many clients
- Consistency can vary by office
- Lower cost structure
- Highly personalized client service
- Greater flexibility in engagement approach
- Strong local/regional plan focus
- Easier direct partner access
- Limited staff bandwidth
- More variability in technical expertise
- Slower adoption of regulatory and technical updates
- Less scalability for large or complex plans
How to Choose a Qualified ERISA Auditor
Look for a firm that is licensed in your state and has real employee benefit plan experience.
Next, ask how many 401(k) audits the firm completes each year. Ask whether the team regularly works with Form 5500 filings, trust statements, census data, and plan testing.
- Independence: The auditor must not have conflicts with the plan or sponsor
- Experience: Benefit plan audits should be a regular part of the firm’s practice
- Peer review: The firm should be current and clean on quality review
- Capacity: Should be able to finish the audit on time
- Communication: The team should explain requests clearly and early
- Fee structure: Flat fees are often easier to budget than open-ended hourly work
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See If You QualifyHow Much Does a 401(k) Audit Cost?
| 401(k) Plan Audit Scenario | Typical Annual Audit Cost (USD) |
|---|---|
| First-time audit (100–200 participants) | $8,000 – $12,000 |
| Small to mid-sized plan | $8,000 – $15,000 |
| Mid-sized plan (500–1,000 participants) | $10,000 – $20,000 |
| Large or complex plan | $15,000 – $30,000+ |
| Very large plan (thousands of participants) | $30,000+ |
A small, large-plan audit may land in the low five figures. Bigger or more complicated plans can cost much more.
Fees tend to rise when there are many participants, many transactions, poor record quality, multiple locations, or complicated plan features.
What drives the price most often is not just the size of the plan, but how much time the auditor has to spend untangling the records.
Common cost factors include:
- number of participants
- number of payrolls and transactions
- plan complexity
- investment structure
- data accuracy
- Response speed from the sponsor and TPA
In my personal opinion, a smooth audit usually costs less than a messy one.
What Kind of Firm is Best For You?
I personally believe you should not go just because of big names. You need to choose the best plan for your needs, regardless of the auditor.
A very large sponsor may prefer a national firm with a deep ERISA team.
A mid-size company may do better with a regional practice that knows the local market and provides quicker service.
And a smaller plan may value a local firm that is easy to reach and flexible to work with.
