Updated 2026-03-20
ADP vs Paychex 401(k) Comparison
Compare ADP Retirement Services (#7, 8.1/10) and Paychex (#16, 7.0/10) side by side across fees, ratings, features, and investment options.
Overall Comparison
| Feature | ADP | Paychex |
|---|---|---|
| Overall Score | 8.1/10 | 7.0/10 |
| Rank | #7 | #16 |
| AUM | $130 billion | $48 billion |
| Participants | 3 million | 730,000 |
| Plan Sponsors | 90,000+ | 740,000+ |
| Founded | 1949 | 1971 |
Ratings Comparison
| Category | ADP | Paychex |
|---|---|---|
| Fees & Costs | 3.4/5 | 3.4/5 |
| Investment Options | 3.5/5 | 3.6/5 |
| Customer Service | 4.0/5 | 3.8/5 |
| Mobile App | 3.7/5 | 3.5/5 |
Fee Comparison
| Fee Type | ADP | Paychex |
|---|---|---|
| Admin Fees | $2,000 - $5,000/year base | $80 - $150/month + per-employee fees |
| Expense Ratios | Varies by investment partner | 0.10% - 1.2% |
| Trading Fees | Plan dependent | Included |
| Advisory Fees | 0.35% - 0.75% | 0.50% - 1.0% |
ADP Strengths
- Direct payroll integration
- Automatic contribution processing
- Strong compliance support
- Easy setup for ADP payroll clients
Paychex Strengths
- Seamless payroll-to-401(k) contribution processing
- One of the largest recordkeepers in the US
- Plans for businesses from 1 to 1,000+ employees
- Bundled HR, payroll, and retirement services
Rollover, Loans & Withdrawals
| Feature | ADP | Paychex |
|---|---|---|
| Rollover Platform | ADP Retirement Portal | Paychex Flex |
| Loans Available | Yes | Yes |
| Withdrawal Methods | Online via ADP portal, Phone (800-695-7526) | Online via Paychex Flex, Phone (800-741-6277), Through plan administrator |
| Distribution Options | Lump sum, Partial withdrawal, Installment payments, Rollover to IRA | Lump sum, Partial withdrawal, Installment payments, Rollover to IRA, Required Minimum Distributions |
Which Should You Choose?
Choose ADP if you want:
- ADP payroll users
- Multi-state employers
- HR bundle seekers
- Compliance-focused companies
Choose Paychex if you want:
- Paychex payroll clients
- Small to mid-size businesses
- Companies wanting bundled HR+retirement
- PEO participants
Our Verdict: ADP vs Paychex
ADP Retirement Services wins this comparison with a score of 8.1/10 vs 7.0/10. ADP excels with direct payroll integration, making it the stronger choice for most investors in this matchup. However, the best choice ultimately depends on your specific needs, employer plan availability, and investment preferences.
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ADP vs Paychex: Complete 401(k) Comparison for 2026
Choosing between ADP Retirement Services and Paychex for your 401(k) is an important decision that affects your retirement savings. ADP offers payroll integration while Paychex is known for payroll integration. In terms of fees, ADP charges Varies by investment partner expense ratios compared to Paychex's 0.10% - 1.2%. ADP manages $130 billion in assets and serves 3 million participants, while Paychex has $48 billion AUM and 730,000 participants.
Key Differences: ADP vs Paychex
When comparing ADP and Paychex, consider their core strengths: ADP excels with direct payroll integration, while Paychex stands out for seamless payroll-to-401(k) contribution processing. Both providers offer a wide range of investment options including target-date funds, index funds, and managed accounts. ADP's customer service rating is 4.0/5 compared to Paychex's 3.8/5. For mobile experience, ADP scores 3.7/5 while Paychex scores 3.5/5.
Which Provider is Right for You?
Choose ADP if you prioritize adp payroll users. Choose Paychex if you're looking for paychex payroll clients. Your decision should also consider your employer's plan availability, fee sensitivity, desired investment options, and customer service expectations. For detailed reviews, visit our individual ADP and Paychex provider pages.
Frequently Asked Questions
ADP Retirement Services scores higher in our 2026 rankings with 8.1/10. ADP is best for adp payroll users, while Paychex is best for paychex payroll clients. The right choice depends on your employer's plan and your priorities.
ADP charges expense ratios of Varies by investment partner with admin fees of $2,000 - $5,000/year base. Paychex charges 0.10% - 1.2% expense ratios with admin fees of $80 - $150/month + per-employee fees. ADP's fees rating is 3.4/5 compared to Paychex's 3.4/5.
Yes, you can roll over between ADP and Paychex. ADP uses ADP Retirement Portal for rollovers, while Paychex uses Paychex Flex. A direct rollover avoids mandatory tax withholding. Contact your new provider to initiate the transfer.
ADP offers 401(k) loans. Paychex offers 401(k) loans. Both providers typically allow loans up to 50% of your vested balance or $50,000, whichever is less.
ADP scores 3.5/5 for investment options, while Paychex scores 3.6/5. Both offer target-date funds, index funds, and managed accounts. ADP's investment options include Partner Fund Lineups, Target Date Funds, Stable Value. Paychex offers Mutual Funds, Target Date Funds, Index Funds.
For small businesses, consider plan minimums and per-participant costs. ADP is best for adp payroll users, multi-state employers, hr bundle seekers, compliance-focused companies. Paychex is best for paychex payroll clients, small to mid-size businesses, companies wanting bundled hr+retirement, peo participants. Compare admin fees: ADP charges $2,000 - $5,000/year base vs Paychex's $80 - $150/month + per-employee fees.
Pavlo Pyskunov
Managing Director & Investment Fund Director
Pavlo Pyskunov analyzes employer-sponsored retirement plans using IRS publications and DOL Form 5500 filings, helping workers maximize their 401(k) savings through data-driven guidance.
Last updated: 2026-03-20