ADP vs PAYC: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: PAYC is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. ADP and PAYC share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined ADP and PAYC exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Automatic Data Processing (ADP) is a Roseland, New Jersey-based global technology company providing cloud-based human capital management (HCM) and payroll solutions to businesses of every size, from single-employee firms using ADP RUN to large multinationals using ADP Workforce Now and Lyric. The company operates through two primary segments: Employer Services, which covers payroll processing, tax filing, benefits administration, talent management, time and attendance, and compliance; and Professional Employer Organization (PEO) Services, under the ADP TotalSource brand, which co-employs client workers to deliver Fortune 500-level benefits packages to smaller firms. ADP also earns a meaningful stream of interest income by holding and investing the client funds it collects between payroll runs before remitting them to employees and tax authorities. Founded in 1949 by Henry Taub and Frank Lautenberg as a manual payroll processor and taken public in 1961, ADP pioneered computerized payroll in the 1960s and grew through decades of acquisitions and organic expansion into its present position as the market leader in global payroll software with roughly 9.9% market share. The company is led by President and CEO Maria Black, who took the helm in 2023, and employs approximately 67,000 people worldwide. ADP's fiscal year ends June 30, and its shares trade on the Nasdaq under the ticker ADP.

Full ADP guide

Paycom Software, Inc. provides a cloud-based human capital management platform that US employers use to run payroll and related HR functions from a single database. Its product suite spans payroll, tax management, time and attendance, benefits administration, talent acquisition, and HR analytics, all built on one system of record so data is entered once and flows everywhere. Paycom sells primarily to the mid-market, businesses with roughly 50 to 5,000 employees, and competes with the likes of ADP, Paychex, Paylocity, Workday, UKG, and Ceridian's Dayforce. The economics are attractive: recurring and other revenues made up about 95% of total revenue in 2025, the company carries no debt, and adjusted EBITDA margins run in the low-to-mid 40s percent, among the highest in the payroll software group.

Full PAYC guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• ADP drivers: Sticky recurring revenue and elite client retention; AI-powered platform evolution expanding wallet share.
• PAYC drivers: Sticky, high-margin recurring revenue; Automation and the Beti bet.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: ADP's growth is materially sensitive to employment levels and interest rates: a recession that raises unemployment reduces the headcount on which per-employee fees are charged, crimps new-business bookings, and may accelerate small-business client failures, while falling rates shrink the float income earned on client funds held between payroll cycles. For PAYC, the clearest risk is decelerating growth: Paycom has slowed from 20%-plus expansion in its hypergrowth years to high single digits, and its 2026 guidance disappointed some investors, so any further slowdown could pressure the stock, which fell sharply in 2025.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick ADP if you believe its drivers more; PAYC if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the ADP and PAYC guides.

ADP. ADP's trailing P/E of roughly 20x represents a meaningful discount to both its own five-year average of approximately 29-30x and to the broader software sector, reflecting a combination of share-price weakness from its 52-week high near $316 and accelerating earnings growth. The adjusted EBIT margin of 26% in fiscal 2025, expanding 50 basis points year-over-year, demonstrates operating leverage even as the company invests heavily in AI and global platform development. Management has guided for fiscal 2026 revenue growth of 5% to 6% and adjusted diluted EPS growth of 8% to 10%, implying continued margin expansion through productivity gains and the lapping of acquisition-related costs.

PAYC. Figures are approximate and tied to the asOf date; confirm current numbers and guidance before making any decision. Paycom sits in an unusual spot for software: clearly profitable and cash-generative, but growing far slower than it once did. That means the valuation debate hinges less on revenue acceleration and more on whether high margins, retention, and capital returns justify the price, so where the growth rate stabilizes matters more than any single quarter.

Headline figures (approximate, 2026-06-27): ADP shows revenue (fy2025, ended june 30, 2025) ~$20.6 billion, revenue (ttm, trailing twelve months to mar 2026) ~$21.6 billion, net income (fy2025) ~$4.1 billion, adjusted diluted eps (fy2025) ~$10.01; PAYC shows revenue trend 2025 revenue was roughly $2.05 billion, up about 9% year over year, a deceleration from prior double-digit growth; 2026 guidance points to mid-to-high single-digit growth, profitability Consistently GAAP-profitable with high margins; adjusted EBITDA margins run in the low-to-mid 40s percent, among the strongest in payroll software, recurring revenue mix About 95% of total revenue is recurring and other (subscription-like), which supports predictable results, balance sheet No debt and strong free cash flow, funding a modest and growing dividend plus share repurchases.

ADP and PAYC are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined ADP and PAYC exposure against your real portfolio. It is not an investment adviser.