“No tax on overtime” sounds like the whole check is exempt. It isn’t. The new federal deduction only covers the premium portion of your overtime — the part above your regular hourly rate — and only up to a yearly cap that shrinks once your income passes a set threshold. This calculator walks through that math with your own numbers instead of asking you to read the worksheet yourself.

Start with the overtime split. If you already know your qualified premium, enter it directly. If you only know your total overtime pay, switch to the hours mode: put in your regular rate, your overtime hours, and what you were actually paid per overtime hour, and the calculator pulls out just the premium — the number that goes on Schedule 1-A, not your full time-and-a-half paycheck.

Tips work the same way but with their own cap and their own eligibility rule: the deduction only applies if your work is in an occupation on the IRS’s published tipped-occupation list, which is why that’s a checkbox here rather than an assumption.

Both deductions shrink once your MAGI crosses $150,000 (or $300,000 filing jointly) — $100 off for every $1,000 over the line, tips and overtime counted separately. The meter tracks exactly where your income sits on that scale, including the point where each deduction runs out. Tips and overtime don’t hit zero at the same income, which is why the meter marks both.

The last card is the one people usually want first: what this is actually worth. It’s an estimate of federal income tax, not a refund number and not extra money in your next paycheck. Social Security and Medicare are untouched by any of this, and your take-home pay stays the same until you file — or update your W-4 yourself.