What is the Overtime Pay Percentage Calculator?
This calculator works out how much you earn for overtime hours when those hours are paid at an enhanced rate. Overtime is commonly paid as a percentage uplift on your normal hourly rate. The two most familiar arrangements are time-and-a-half (a 50% uplift) and double time (a 100% uplift), but employers use many other figures such as 25% or 75%. Enter any uplift percentage and the tool handles it.
How to use it
Enter three numbers: the number of overtime hours you worked, your base (normal) hourly rate, and the overtime uplift as a percentage. The calculator returns your total overtime pay, the effective overtime hourly rate, what the same hours would have paid at the base rate, and the overtime premium — the extra money earned because of the uplift.
The formula explained
The core equation is $$\text{OT Pay} = \text{hours} \times \text{rate} \times \left(1 + \frac{\text{uplift}}{100}\right)$$ The term \(\left(1 + \frac{\text{uplift}}{100}\right)\) is the multiplier. A 50% uplift gives a multiplier of 1.5 (time-and-a-half), and a 100% uplift gives 2.0 (double time). Multiplying your base rate by this figure produces the overtime hourly rate, and multiplying by the hours gives total pay.
Worked example
Suppose you worked 10 overtime hours at a base rate of $20 with a time-and-a-half (50%) uplift. The multiplier is \(1 + \frac{50}{100} = 1.5\), so your overtime rate is \(\$20 \times 1.5 = \$30\). Total overtime pay is \(10 \times \$30 = \$300\). At the base rate those hours would have paid $200, so the overtime premium — the extra you earned — is $100.
FAQ
What uplift is time-and-a-half? Time-and-a-half means a 50% uplift, so enter 50. Double time is a 100% uplift, so enter 100.
Does this include tax? No. The figures are gross (before tax and deductions). Your take-home pay will be lower after withholding.
Can I use it for a flat overtime rate? If you only know the overtime rate (not a percentage), divide it by your base rate, subtract 1 and multiply by 100 to get the uplift — for example $30 overtime on a $20 base is \(\left(\frac{30}{20} - 1\right) \times 100 = 50\%\).
