ADP vs PAYX

For growth investors, Automatic Data Processing, Inc.

(ADP) is the stronger pick with 7. 1% revenue growth year-over-year, versus 5. 6% for Paychex, Inc. (PAYX). Paychex, Inc. (PAYX) offers the better valuation at 20. 0x trailing P/E (16. 6x forward), making it the more compelling value choice. Analysts rate Automatic Data Processing, Inc. (ADP) a "Hold" — based on 36 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Paychex, Inc.

(PAYX) is the cheapest at 20. 0x versus Automatic Data Processing, Inc. at 20. 8x. On forward P/E, Paychex, Inc. is actually cheaper at 16. 6x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Automatic Data Processing, Inc. wins at 1. 58x versus Paychex, Inc. 's 1. 95x — a reasonable growth-adjusted valuation.

Over the past 5 years, Automatic Data Processing, Inc.

(ADP) delivered a total return of +19. 5%, compared to +7. 3% for Paychex, Inc. (PAYX). Over 10 years, the gap is even starker: ADP returned +185. 6% versus PAYX's +130. 2%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Automatic Data Processing, Inc.

(ADP) is the lower-risk stock at 0. 37β versus Paychex, Inc. 's 0. 39β — meaning PAYX is approximately 3% more volatile than ADP relative to the S&P 500. On balance sheet safety, Paychex, Inc. (PAYX) carries a lower debt/equity ratio of 122% versus 146% for Automatic Data Processing, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Automatic Data Processing, Inc.

(ADP) is pulling ahead at 7. 1% versus 5. 6% for Paychex, Inc. (PAYX). On earnings-per-share growth, the picture is similar: Automatic Data Processing, Inc. grew EPS 9. 7% year-over-year, compared to -1. 9% for Paychex, Inc.. Over a 3-year CAGR, ADP leads at 7. 6% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Paychex, Inc.

(PAYX) is the more profitable company, earning 29. 7% net margin versus 19. 8% for Automatic Data Processing, Inc. — meaning it keeps 29. 7% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: PAYX leads at 39. 6% versus 26. 3% for ADP. At the gross margin level — before operating expenses — PAYX leads at 72. 4%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Automatic Data Processing, Inc. (ADP) is the more undervalued stock at a PEG of 1. 58x versus Paychex, Inc. 's 1. 95x. Both stocks trade at elevated growth-adjusted valuations, so expected growth needs to materialise. On forward earnings alone, Paychex, Inc. (PAYX) trades at 16. 6x forward P/E versus 18. 8x for Automatic Data Processing, Inc. — 2. 1x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for PAYX: 22. 7% to $112. 14.

All stocks in this comparison pay dividends.

Paychex, Inc. (PAYX) offers the highest yield at 4. 4%, versus 2. 8% for Automatic Data Processing, Inc. (ADP).

For long-horizon retirement investors, Automatic Data Processing, Inc.

(ADP) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 37), 2. 8% yield, +185. 6% 10Y return). Both have compounded well over 10 years (ADP: +185. 6%, PAYX: +130. 2%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Industrials sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: ADP is a mid-cap quality compounder stock; PAYX is a mid-cap income-oriented stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.