Paid Sick Leave Means Something Different in Every State
There is no federal paid sick leave law. State and city rules on accrual, waiting periods, and carryover show how differently a minimum can be defined.
A company with offices in Seattle, Detroit, and New York cannot write one paid sick leave policy and apply it everywhere. There is no federal law requiring paid sick leave at all — the requirement, where it exists, comes entirely from states and cities, and each one has built its own version of what counts as the minimum.
Washington sets a clear accrual formula: employees must be provided one hour of paid sick leave for every 40 hours worked, regardless of whether they are full-time, part-time, temporary, or seasonal. That rate is simple to state and surprisingly easy to get wrong in practice, because it has to apply to every hour actually worked, including overtime, not just to a standard full-time week — a part-time employee working irregular shifts still accrues on the same per-hour basis as someone working full weeks.
Accrual is only half the rule
Earning the time and being allowed to use it are two different milestones, and Washington separates them deliberately: an employee is entitled to use paid sick leave they have accrued once they have reached 90 calendar days of employment. A new hire who gets sick in their second week has almost certainly accrued a few hours already, but cannot draw on them yet, which means onboarding paperwork needs to say so clearly rather than letting a new employee assume the balance is usable from day one.
Carryover is where a lot of policies quietly go wrong at year-end. Washington requires, at minimum, that employees carry over their accrued, unused paid sick leave balances of 40 hours or less from one accrual year to the next. An employer can offer a more generous carryover cap, but cannot zero out a balance under that floor just because the calendar flipped, and a payroll system built around a single national "use it or lose it" date will violate this the first January it runs.
Washington also lets employers ask for proof once an absence runs long enough, though the state limits how that verification can work. An employer can require documentation only after an absence stretches beyond a handful of consecutive workdays, and any such requirement has to be written into the policy in advance rather than invoked case by case after the fact. Employees also have the right to challenge a verification demand that creates an unreasonable burden, which means the paperwork obligation runs in both directions, not just toward the employee.
Some states are still actively rewriting the rule
Michigan is a useful reminder that these are not settled, one-time laws. On Feb. 21, 2025, the Michigan Earned Sick Time Act went into effect, amending the state's existing framework and expanding what paid sick leave covers, after the legislature revisited a law that businesses and workers alike had already been operating under for some time. An employer that trained HR on the old version and never circled back is now running a policy that may no longer match the statute.
New York City has gone a step further than a rename. Under its current rules, covered employees have the right to protected time off and paid prenatal leave, folding what used to be a narrower sick leave law into a broader category that includes scheduling protections and a distinct paid leave benefit tied specifically to pregnancy. A policy document still labeled "Paid Sick Leave Law" and copied from a few years ago is describing a law that, in that city, does not fully exist anymore under that name.
What a multi-jurisdiction policy actually needs
None of these differences are cosmetic. Accrual rate, the waiting period before leave can be used, the carryover floor, and even what the benefit is called all vary by jurisdiction, and a single company-wide handbook page cannot capture all of it without becoming either wrong somewhere or so vague it tells nobody anything useful. The workable approach is a base policy that meets the strictest jurisdiction a company operates in, with a short jurisdiction-specific addendum for anywhere local law asks for something the base policy does not already cover. It costs more to build once. It costs far less than explaining to a state investigator why the handbook still describes a law that changed two years ago. A jurisdiction map reviewed once a year, rather than once at hiring, is the cheapest insurance available against all of it.