Quick Answer
TL;DR: If you employ US workers as W-2 employees, payroll is required.
Who this helps: Founders hiring in the US and unsure when payroll obligations start.
Decision summary: Validate worker type and state footprint early. Delayed payroll setup creates immediate compliance exposure.
Primary Trigger: Hiring Employees
Payroll is generally required once you hire employees and pay wages subject to withholding and employment tax rules.
This applies even if the founder is outside the US and the team is distributed.
State-Level Triggers
State registrations and reporting obligations depend on where workers are located and where services are performed.
A remote team can still create multi-state payroll obligations quickly.
Contractor-Only Models
Contractors are handled differently, but classification must be defensible. Incorrect contractor treatment can trigger payroll liabilities retroactively.
Founders should document role criteria and review borderline cases before onboarding.
Best Practice
Do not wait for the first issue notice. Plan payroll setup before first employee start date and validate each new state entry.