401(k) · DOL Form 5500 · 2024

Costaff Services, LLC 401(k) Plan

Data updated 2026-08-25

$66M
Total assets Below avg plan size
1,422
Participants Near avg headcount
87th
Percentile by assets National rank
$46,109
Avg per participant Low balance/head
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Official DOL plan name: Costaff 401(k) Plan · Sponsored by Costaff Services, LLC · Michigan · Administrative & Support Services

$66M in assets, 1,422 participants

Costaff Services, LLC's Costaff 401(k) Plan reported $66M in total assets and 1,422 participants in its 2024 DOL Form 5500 filing, ranking in the 87th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #4,085 in Administrative & Support Services (4,368 peers)

Coverage in Michigan

Costaff 401(k) Plan covers 1,422 participants in Michigan, 2.2x the typical Michigan plan (state average ~638 per filing). Assets: $66M.

#4,085
in Administrative & Support Services (4,368 peers)
+31.1%
assets growth YoY
0.7×
vs typical plan assets (national mean)

Costaff 401(k) Plan's outsized position by total assets

Costaff 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$65,566,452 Top 13% higher than 87% of 123,620 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Costaff 401(k) Plan's large-plan peer group by participant headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Costaff 401(k) Plan lands in the large band (1,422 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Costaff 401(k) Plan end-of-year assets rose from $50M in the plan year 2023 filing to $66M in the plan year 2024 filing.
  • Costaff 401(k) Plan reported participants rose from 1,276 in the plan year 2023 filing to 1,422 in the plan year 2024 filing.
  • Costaff 401(k) Plan reported net income rose from $11M in the plan year 2023 filing to $12M in the plan year 2024 filing.

See the national 2023→2024 release diff →

Form 5500 schedule snapshot

Filing strip 383546978 · Costaff Services, LLC PY 2024 · 401(k)

Costaff 401(k) Plan · $66M · 1,422 · 87th

  • IND $66M
  • IND 1,422
  • IND 87th
  • IND 401(k)
  • IND near Imcd Holdings U.S., Inc. 401(k) Plan
  • IND ind #4085

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Administrative & Support Services retirement plans → · Plans in Michigan →

Costaff 401(k) Plan in the asset neighbourhood

Costaff 401(k) Plan$66MIcm Ventures Retirement Plan$66MImcd Holdings U.S., Inc. 401(k) PlanImcd Holdings U.S., Inc. 401…$66MElevate Credit, Inc. 401(k) PlanElevate Credit, Inc. 401(k) …$66MOmnimax International, LLC Retirement and Savings PlanOmnimax International, LLC R…$66M
End-of-year total assets ($M) among Costaff 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Michigan filing particulars

Total Assets (Beginning of Year)$50M
Net Assets (End of Year)$66M
Net Income$12M
Employer EIN383546978
Plan Effective Date2007-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Costaff Services, LLC)

Sponsor-wide plan assets over time

All Costaff Services, LLC plans reported in each filing year

Latest sponsor-wide plan assets
$66M 60.8910089818211% vs 2022
2024 filing year
$30M$40M$50M$60M$70M 202220232024 $40.8M $65.6M ▲ +60.9%
Year Plans Participants Total Assets
2022 1 1,078 $41M
2023 1 1,276 $50M
2024 1 1,422 $66M

Nearby 401(k) Plans in Michigan

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Costaff 401(k) Plan vs. nearby 401(k) plans in Michigan, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -100102030 Total assets ($B) Participants Costaff 401(k) Plan, Total assets ($B): 0.065566452 · Participants: 1422Costaff 401(k) PlanGeneral Motors Retirement Savings Plan for Salaried Employees in the United States, Total assets ($B): 23.0591668 · Participants: 43053General Motors Retirement Savings Plan for Salaried Employees in the United StatesFord Motor Co. Savings and Stock Investment Plan for Salaried Employees, Total assets ($B): 17.26893589 · Participants: 31790Ford Motor Co. Savings and Stock Investment Plan for Salaried EmployeesThe Dow Chemical Company Employees' Savings Plan, Total assets ($B): 10.768606712 · Participants: 17128The Dow Chemical Company Employees' Savings PlanThe General Motors Personal Savings Plan for Hourly-Rate Employees in the United States, Total assets ($B): 9.568379082 · Participants: 42513The General Motors Personal Savings Plan for Hourly-Rate Employees in the United StatesFord Motor Co. Tax-Efficient Savings Plan for Hourly Employees, Total assets ($B): 8.2932975 · Participants: 60497Ford Motor Co. Tax-Efficient Savings Plan for Hourly Employees
Costaff 401(k) Plan vs. nearby 401(k) plans in Michigan, assets vs. participants
Compare Costaff 401(k) Plan side-by-side with 3 peers →

Costaff 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Michigan, the nearest 401(k) by assets is Imcd Holdings U.S., Inc. 401(k) Plan in OH ($66M); by covered participants it is Paradigm Oral Health 401(k) Profit Sharing Plan in NE (1,422 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($66M here).

Similar participant headcount

Nearest other-state filings by covered participants (1,422 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Costaff 401(k) Plan assets move in 2024? ▼
Costaff 401(k) Plan surged - up 31.1% during 2024, from $50M to $66M. Reported net income was $12M.
How have Costaff Services, LLC plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Costaff Services, LLC's sponsor-wide assets grew 60.9%, from $41M to $66M.
Where does Costaff 401(k) Plan rank by assets among Form 5500 filers? ▼
Costaff 401(k) Plan ranks in the 87th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Costaff 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Imcd Holdings U.S., Inc. 401(k) Plan in OH ($66M, 377 participants).
Which 401(k) plans cover a similar participant headcount to Costaff 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Paradigm Oral Health 401(k) Profit Sharing Plan in NE (1,422 participants, $46M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 383546978.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.