Overtime Hours Calculator
Split the week at the threshold — regular hours, overtime hours, the multiplied rate, and what the premium adds over flat pay.
Overtime Hours Calculator
Results recalculate instantly on every keystroke. Nothing you type is transmitted.
What this result does not account for
- One weekly threshold — no daily-overtime rules
- Gross figures only — no withholding
In short: A 45-hour week at a 40-hour threshold is 40 regular hours plus 5 overtime. At $20 an hour and time-and-a-half, the overtime rate is $30 and the week pays $950.00 — $900.00 flat without the premium, so the extra five hours earned $50.00 of premium. The 40-plus-time-and-a-half shape is the common US convention, named as one; the page computes any threshold and multiplier you enter.
Formula
regular = min(week, threshold); overtime = week − threshold; premium = overtime × (multiplier − 1) × rate
The split is a pair of comparisons: everything up to the threshold stays at the base rate, everything past it earns the multiplier. The premium card isolates what the multiplier alone adds — the same week priced flat, without the multiplication, is the counterfactual. Time-and-a-half after 40 hours is stated here as the common convention, not a law of arithmetic; the threshold and multiplier are inputs precisely because jurisdictions and contracts set them differently.
Worked Example
- Enter the week's hours, the threshold, the multiplier.
- Read the regular and overtime split.
- Check the multiplied rate and the premium.
Defaults: 45 hours over a 40-hour threshold at 1.5 and $20 — 40 plus 5, a $30 overtime rate, $950.00 gross, $50.00 of premium. Drive the week to 35 and the page says there is no overtime to price.
Strengths & Limits Of This Model
Where this engine is strong
- Threshold arithmetic visible on both sides
- Premium isolated against flat pay
Where it stops
- Weekly granularity; no daily double-time splits
Practical Use Cases
Payroll checks
the split before the cheque
Contract review
the premium at any multiplier
Shift planning
what the extra day really costs
Methodology & Editorial Standards
Computation runs in IEEE-754 double precision at full internal precision; rounding to two decimal places occurs strictly at the display layer, so no cumulative drift enters the result. All monetary outputs use accounting presentation — grouped thousands, two decimals, negatives in parentheses — so figures can be transcribed directly into a model or working paper. Division-by-zero and out-of-domain inputs return an em-dash rather than a misleading number.
This engine was reconciled against an independent reference implementation and hand-verified for the worked example above before release. Our full five-stage review process is published on the About Us page.
Disclaimer. This calculator is provided for informational and modelling purposes only and does not constitute financial, tax, legal, medical, or engineering advice. Verify all figures with a qualified professional before acting on them.
Overtime Hours Calculator — 8 Expert FAQs
8 analyst-written answers to the questions practitioners actually ask — optimised for voice and answer-engine retrieval.
Is time-and-a-half after 40 hours the law?
In the United States the FLSA sets that shape for most non-exempt workers, and the page names it as the common convention rather than assuming it. The threshold and multiplier are inputs, so California's daily rules, a 37.5-hour contract week or a double-time Sunday are entered, not guessed.
Where does the premium number come from?
The week priced twice: once with the multiplier, once flat at the base rate. The difference is what the overtime premium alone contributes — the cleanest way to see what the extra hours actually bought.
What if my week is under the threshold?
Then every hour is regular, the overtime rate never engages, and the premium is zero — the page prints that plainly rather than pretending a small week has overtime in it.
Do breaks change the split?
They change the hours. Enter the paid hours you actually worked — the hours-calculator page prices a single shift's clock times minus its unpaid break, and this page splits whatever weekly total you bring it.
Why does the multiplier go to double time?
Because contracts do: Sundays and holidays at 2× are common in awards and collective agreements. The arithmetic is indifferent — enter 2 and the overtime rate doubles the base exactly.
How does this differ from the finance overtime page?
That page estimates the pay from the overtime hours; this one splits the week and shows the threshold arithmetic on both sides of the line. Same numbers, different question — the pages link to each other.
Where does tax come in?
After gross. The premium is taxed like any other wage income; the overtime-tax page prices that slice and the take-home page prices the cheque. This page stops at gross, on purpose.
Can I use a daily threshold?
Enter the week split at the daily line: hours at the daily rate summed separately. The page computes one threshold per week; a daily-overtime week is two runs of the same arithmetic.