Overtime pay is one of the most common places where small misunderstandings create big differences on a paycheck. The good news: most overtime calculations follow the same pattern — define a base hourly rate, decide which hours are “overtime”, and apply a multiplier. This guide explains the parts you need, shows a few realistic examples, and highlights mistakes that frequently cause incorrect totals.
1) Know your base hourly rate
Overtime calculations usually start from your regular hourly rate. If you are salaried, you typically need an equivalent hourly rate (based on your work schedule).
If you already know your hourly rate, great. If not, you can estimate it from your salary by dividing by the number of paid hours in the period (for example, weekly hours × number of weeks). Some employers use a specific conversion method for salaried employees, so treat your result as an estimate unless your payroll policy states otherwise.
2) Identify the overtime threshold
Rules vary by employer and location. Common patterns include overtime after a certain number of hours per day or per week. Always confirm the threshold used for payroll in your case.
Two workplaces can have different thresholds even for the same role. For example, one might pay overtime after 40 hours in a week, while another pays overtime after 8 hours in a day. When you calculate, pick the rule that matches your timesheet and payroll settings.
3) Apply the overtime multiplier
Many workplaces use a multiplier such as 1.5× for overtime hours (and sometimes higher for holidays). Your overtime rate is often: overtime rate = hourly rate × multiplier.
Some policies include multiple tiers (for example, 1.5× after a threshold and 2× after a higher threshold). If you have tiers, calculate each tier separately and add them together.
4) Quick example
- Hourly rate: $20
- Overtime multiplier: 1.5×
- Overtime hours: 6
- Overtime pay: $20 × 1.5 × 6 = $180
5) Example with weekly threshold
Suppose your policy pays overtime after 40 hours per week. You worked 46 hours this week at $22/hour, with a 1.5× overtime multiplier.
- Regular hours: 40 → Regular pay: 40 × $22 = $880
- Overtime hours: 6 → Overtime rate: $22 × 1.5 = $33
- Overtime pay: 6 × $33 = $198
- Total (before taxes): $880 + $198 = $1,078
6) Example with daily threshold
Suppose overtime applies after 8 hours per day. If you worked 10 hours on Tuesday at $18/hour, with 1.5× overtime:
- Regular: 8 × $18 = $144
- Overtime: 2 × ($18 × 1.5) = 2 × $27 = $54
- Total for the day: $198
7) Common mistakes (and how to avoid them)
- Mixing minutes and decimal hours: 7:30 is 7.5 hours, not 7.30.
- Rounding too early: Round only at the final totals unless policy requires otherwise.
- Using the wrong threshold: Confirm if overtime is daily, weekly, or both.
- Forgetting unpaid breaks: Break deductions can change whether you cross a threshold.
- Ignoring tiers: If your policy has 1.5× and 2× tiers, calculate each tier separately.
8) What you need before you calculate
- Your base hourly rate (or a salary-to-hourly estimate)
- Total hours worked in the period (day or week)
- Overtime threshold (for example 8/day or 40/week)
- Overtime multiplier(s) (for example 1.5×, 2×)
Try it on CalcTap
Enter your hourly rate, overtime hours, and multiplier to get an instant estimate. Open Overtime Calculator
If you’re starting from a monthly or annual salary, converting it to an hourly estimate first can make the overtime math easier. Open Salary Per Hour Calculator
Note: This is general information and may not match local labor laws or your employer’s exact payroll method.