The "no tax on tips" and "no tax on overtime" deductions are arithmetic anyone can do with a calculator or worksheet. The problem is that each has a non-obvious step that a quick by-hand estimate tends to skip — the overtime deduction is only half the overtime rate, and the phase-out rounds up, not down.
| Step | Common mistake by hand | What this calculator does |
|---|---|---|
| Overtime deduction amount | Uses the full time-and-a-half overtime pay ($30/hr example) instead of just the extra half-time premium ($10/hr), overstating the deduction roughly 3x. | Computes rate × 0.5 × overtime hours × weeks — the premium-only figure the statute actually allows. |
| The MAGI phase-out | Skipped entirely, or the excess over the threshold is rounded down to the nearest $1,000 instead of up. | Reduces each deduction by $100 per $1,000 of MAGI over the threshold, rounding the excess UP ("or fraction thereof") — $150,001 costs the same first $100 as $150,999. |
| Adding tips and overtime together | Adds gross tips and gross overtime pay into one uncapped total. | Caps each deduction separately ($25,000 tips; $12,500/$25,000 overtime) and phases each out independently before summing. |
| Self-employed tip income | Deducts the full qualified-tips figure even when net profit from that specific tipped work is lower. | Caps the self-employed tip deduction at net profit from the tipped trade or business, when that figure is entered. |
| Is anything I enter uploaded anywhere? | N/A | No. The calculator runs entirely in your browser; nothing is sent to a server. |
Using the full time-and-a-half overtime rate instead of only the half-time premium. Qualified overtime compensation is just the extra 0.5x portion of the overtime rate over the regular rate -- someone earning $30/hr on overtime from a $20/hr base has $10/hr of qualified premium, not $30/hr. Using the full rate overstates the deduction by 3x.
Forgetting it applies at all, or rounding the excess MAGI down to the nearest $1,000 instead of up. The statute reduces the deduction by $100 per $1,000 of MAGI over the threshold, 'or fraction thereof' -- so $150,001 of MAGI already costs the first $100, the same as $150,999 does. Rounding down understates the phase-out and overstates the deduction near a $1,000 boundary.
No. Tips are capped at $25,000 and overtime premium is capped separately at $12,500 (single/head of household) or $25,000 (joint) -- and both totals shrink independently once MAGI clears $150,000 single or $300,000 joint. Adding uncapped totals together overstates the deduction for anyone near or above either cap or threshold.
No. For self-employment income, the deduction cannot exceed net profit from the specific tipped trade or business, even if qualified tips received and the phased-out cap would otherwise allow more -- a common omission in a quick by-hand estimate that only looks at gross tips.
No. Neither this calculator nor a by-hand worksheet built from this page knows your full return -- other deductions, credits, self-employment tax, or state conformity. Both apply the same published federal caps and phase-out formula to the numbers you enter; verify against the IRS's own guidance or a qualified tax professional before filing.