500–999 participants · 401(k) Retirement Plan Benchmarks

Plan-size benchmark across all industries and states. Sourced from 7,302 Form 5500 filings for plan year 2024.

Headline numbers (2024)

Plans: 7,302
Total assets: $445.6B
Total participants: 5,086,197
Median expense ratio: 0.15%
Median employer contribution per active participant: $1,752
Median account balance: $52,585
3-year asset growth (2024–2024): —

Expense ratio distribution

25th percentile: 0.05%
Median: 0.15%
75th percentile: 0.33%

Where the fees go (average mix)

Admin / Recordkeeping: 34.4%
Investment Management: 57.3%
Audit: 6.0%
Legal: 0.4%

Employer contribution generosity

Median per active participant: $1,752
Plans with $0 employer match: —

3-year trend

Year	Plans	Assets	Participants	Median fee	Median employer $
2024	7,302	$445.6B	5,086,197	0.15%	$1,752

Methodology

All metrics are calculated from U.S. Department of Labor Form 5500 annual filings. The slice "500–999 participants · 401(k)" is served from the accepted-generation projection for plan year 2024. Medians use percentile_cont over reported values; zero/null values are excluded from rate-style metrics.

Citation: PlanProvider.Pro, Form 5500 Benchmarks 2024. Free for editorial use with attribution + link to https://planprovider.pro/benchmarks/plan-size/s_500_999-401k.