The exempt/non-exempt line is the whole game
Almost every “do I qualify?” question resolves to this one. The FLSA divides workers into non-exempt (owed overtime) and exempt (not owed it). The deduction only exists where FLSA overtime exists, so it follows that line exactly. Two things people get wrong: being salaried is not the same as being exempt — a salaried worker below the exemption threshold is still owed overtime — and a job title does not settle it, the actual duties and pay do.
Working overtime in a daily-overtime state
California, Alaska, Nevada and Colorado require overtime after a set number of hours in a single day, not just after 40 in a week. That is state law doing something the FLSA does not. Hours that are overtime under both rules are still FLSA overtime and still count; hours that are overtime only under the state daily rule generally do not generate a qualified amount on their own. The state overtime pages spell out which rule applies where — start with California if you work under the strictest one.
What about holiday and weekend premiums?
Not qualified, as a rule. Federal law requires no premium for holiday or weekend work at all, so when an employer pays 1.5x for Thanksgiving it is doing so by policy. That makes it ordinary taxable wages rather than FLSA overtime. The holiday pay pages go through this holiday by holiday.
If you qualify, size it
Eligibility is binary; the amount is not. Put your rate, your typical overtime hours and your filing status into the no tax on overtime calculator to see the qualified premium and what it saves. If your income is near the thresholds, read the income limits first — the phase-out can cut a full-cap deduction to nothing.