Work & Payroll Guides

Deep, practical explainers behind our calculators — the rules, formulas, and edge cases that decide real paychecks.

How to Calculate Shift Differential Pay Step-by-step guide to calculating shift differential pay: percentage vs flat methods, typical rates by industr… PTO Payout Laws by State Which US states require employers to pay out unused PTO? Full state-by-state breakdown, use-it-or-lose-it rule… Notice Period Rules: 30/60/90 Days Explained How notice periods really work: calendar vs working days, one-month notice, buyouts, garden leave, and calcula… Business Days Explained What counts as a business day, how to count business days for deadlines and shipping, weekend rollover rules, … The 75% Attendance Rule How the 75% attendance requirement works, how many classes you can miss, how to recover a shortfall, and the c… How Bonuses Are Taxed Why bonuses are withheld at 22%, whether they are really taxed higher, the aggregate method, and how to keep m…