The federal floor is low — states build on it
Federal employment law sets a surprisingly thin floor: no severance requirement, no final-pay deadline, no vacation payout mandate. Everything specific about how a separation must be handled comes from your state, and the differences are large enough to change what you are owed by thousands of dollars.
Final pay and vacation payout
The most immediate state variable is the final paycheck deadline — the day of discharge in California, the next regular payday in many other states, with penalties for lateness that range from none to 30 days of wages. Vacation payout splits similarly: many states treat accrued vacation as earned wages that must be paid at separation; others permit use-it-or-lose-it policies. The U.S. DOL publishes a directory of state payday rules, and your state labor department enforces them at no cost to you.
At-will, with state-shaped exceptions
Every state but Montana presumes at-will employment, but each has carved its own exceptions: implied-contract claims from handbook language, covenant-of-good-faith claims in a minority of states, and public-policy exceptions whose breadth varies widely. Whether your termination fits an exception is a state-law question — the same facts support a claim in one state and nothing in another.
Non-competes and mini-WARN acts
Two more state-level variables matter at separation. Non-competes are void in California, Minnesota, Oklahoma, and North Dakota, salary-restricted in a growing list of states, and fully enforceable elsewhere — never assume either way. Mini-WARN acts in roughly a dozen states extend mass-layoff notice rules below the federal thresholds, and New Jersey's goes further by mandating severance pay in covered layoffs.
Putting it together
Before signing a separation agreement, check three state-specific items: what final pay and PTO you are owed regardless of the agreement, whether any restrictive covenant you signed is even enforceable, and whether your termination fits a recognized exception to at-will employment. The Severance Estimator sets the conventional baseline; your state labor department and an employment attorney licensed in your state supply the rules that make the baseline mean something.
The state variables at a glance
| Variable | The state range | Why it changes your position |
|---|---|---|
| Final-pay deadline | Day of discharge (CA) → next regular payday | Set how fast owed wages must arrive; late-payment penalties escalate in some states |
| Vacation payout | Accrued PTO is earned wages → forfeitable under policy | Can be thousands of dollars owed before severance is even discussed |
| At-will exceptions | Narrow public-policy carve-outs → implied-contract and good-faith claims | Same facts support a claim in one state and nothing in another |
| Non-compete law | Void (CA, MN, OK, ND) → salary-restricted → generally enforceable | Changes both your leverage and your next job's risk |
| Mass-layoff notice | Federal WARN only → mini-WARN acts → mandated severance (NJ) | Covered layoffs may carry statutory rights beyond the offer letter |
Montana: the exception that proves the rule
Every "at-will" summary quietly footnotes one state. Montana's Wrongful Discharge from Employment Act requires good cause for discharge once a probationary period ends, and it pairs that with its own notice and final-pay rules. The practical effect: in Montana, a termination without documented cause is itself the claim, which changes the severance conversation from "what will you pay me to leave quietly" to "what will it cost you if I don't." Elsewhere, the same conversation depends on finding a recognized exception — which is why the exception inventory, not the employment relationship, is the first thing a state-licensed attorney will examine.
A worked contrast: the same firing in two states
Take the same facts: an employee with three years of service, five days of accrued PTO, and a termination immediately after a safety complaint. In California: final wages are due the day of discharge, the PTO payout is legally owed as wages, any non-compete in the file is void, and the public-policy exception for safety complaints is well developed — the "owed" floor is high and the leverage is strong. In a default at-will state with use-it-or-lose-it PTO, enforceable covenants, and a narrow public-policy exception: the owed floor may be just the final week's wages, and the claim analysis starts from nearly zero. Same performance, same complaint, same employer playbook — materially different outcome. Hypothetical contrast for illustration; the controlling texts are the state's statutes and your own documents.
Where to verify your state's rules
This guide is a map of the variables, not a substitute for the rules themselves. Your state labor department publishes the payday and final-pay rules and enforces them for free; our state rule pages collect the claim-relevant rules for the states we cover, with primary sources. Then bring the full picture to the negotiation: what you are owed regardless of any deal is covered in severance versus final pay, and the leverage inventory that turns those rules into negotiation position is in factors that affect severance.