Gusto vs ADP

This is one of the most common HR software evaluations in small business — and the right answer depends almost entirely on company size. Gusto was designed for US teams under 50 employees who want payroll done simply, transparently, and without a sales process. ADP was built for companies with complex payroll requirements: union rules, shift differentials, prevailing wage, and certified payroll for government contracts. Both handle US multi-state payroll competently. But they're built for fundamentally different users, and choosing the wrong one means either overpaying (ADP for a 15-person startup) or under-leveraging (Gusto for a 500-person multi-union company).

On payroll mechanics, ADP is the industry benchmark for complexity. Its 70+ years of US payroll processing means ADP's tax filing has been tested in more edge cases than any other provider. Tax penalty protection — where ADP covers the cost of penalties from its own filing errors — is included in higher tiers and covers scenarios Gusto doesn't encounter. Gusto's payroll is excellent for its target market: automatic federal, state, and local tax calculation and filing, W-2s and 1099-NECs included in every plan, and multi-state support across all 50 states. Both are reliable. The difference is in complexity coverage: for standard payroll, Gusto and ADP are interchangeable. For union payroll, certified payroll, or tipped employee calculations, ADP is the only viable option of the two.

Pricing is where the practical decision is made. Gusto's pricing is fully transparent: $40/month + $6/person on Simple, published on its website, with no sales call required. A 12-person team on Gusto Simple pays $112/month. ADP requires a custom quote — user-reported prices from Reddit's r/smallbusiness show a 12-person team quoted approximately $264/month by ADP for equivalent payroll functionality. That difference of $152/month ($1,824/year) is significant for a small business. Gusto also offers a 30-day free trial with full feature access. ADP offers a product demo only, followed by an annual contract with early termination fees.

At larger company sizes, the calculus changes. ADP Workforce Now (the mid-market product) adds a full HRIS, advanced workforce analytics, succession planning, and compensation management that Gusto doesn't offer. Its time and attendance handles shift scheduling, overtime rules, and attendance exceptions better than Gusto's more basic tracking. ADP's HR advisory services give companies access to payroll specialists on retainer — meaningful for companies without full-time HR staff facing complex employment situations. For a company scaling from 100 to 500 employees across multiple states with hourly workers, ADP starts to justify its premium. For a startup hiring engineers in two states, Gusto is a materially better choice at a fraction of the cost.