Ask an employment lawyer and you'll get the safe answer: "review it annually." The data says annual review is the minimum, not the standard.

The actual pace of change

Consider what changed in just the last few years:

  • Paid sick leave went from a handful of states to 20+, each with different accrual rates, caps, and covered uses. Illinois' Paid Leave for All Workers Act (2024) made leave usable for any reason — language older handbooks don't have.
  • California SB 553 (July 2024) required nearly every California employer to adopt a written Workplace Violence Prevention Plan — a brand-new mandatory document.
  • Pay transparency laws took effect in Colorado, California, New York, Washington, Illinois (2025), Massachusetts (2025), and New Jersey (2025), several of which affect internal policies, not just job postings.
  • The PUMP Act and Pregnant Workers Fairness Act (2023) created federal lactation and pregnancy-accommodation obligations most pre-2023 handbooks never mention. New York went further in 2024: 30 minutes of paid lactation break time and a mandatory written policy.
  • Cannabis protections in California (AB 2188), Washington, New York, and New Jersey made some older drug-testing policies unlawful.

If your handbook predates any of these and you have employees in the affected states, it isn't just stale — parts of it may now describe practices that violate current law.

The three triggers for an update

  1. A law changes in a state where you have employees. This is the big one, and it happens on January 1 and July 1 of every year in waves.
  2. Your footprint changes. One remote hire in a new state can trigger a dozen new policy requirements. If you hired across state lines since your last update, you're due.
  3. Your practices change. New PTO structure, new remote-work stance, new benefits — the handbook should describe the company you actually run.

The realistic cadence

For a company with employees in more than one state, twice a year matches the actual legislative rhythm: once after the January 1 effective-date wave, once mid-year to catch July effective dates and your own drift. That's exactly why HandbookHQ includes 2 handbook updates per year in the $199 plan — it isn't an arbitrary number; it's the cadence the law actually demands.

A quick self-test: if your handbook doesn't mention the PWFA, has no lactation policy, or describes sick leave as a fixed annual grant in an accrual state — it's overdue. Run the free compliance check to see what else is stale.

Not legal advice. Statutes cited as of mid-2026; consult employment counsel about your situation.