Labour Cost Calculator
Calculate labour costs for your construction projects. Enter days, hours, rates, and overtime to get accurate cost estimates for your workforce.
How It Works
Enter the number of days, hours, hourly rate, and number of workers. The calculator handles overtime at different rates (time and a half, double time, etc.).
Features
- Calculate by days, hours, or both combined
- Handle multiple workers at once
- Overtime calculations with custom multipliers
- Weekly and monthly cost projections
- Custom hours per day (for part-time or longer shifts)
Typical Overtime Rates
- Time and a half: 1.5× base rate (common for weekday overtime)
- Double time: 2× base rate (common for weekends/bank holidays)
- Triple time: 3× base rate (rare, special occasions)
UKUK Building Regulations
References & Sources
Standards Cited
- HMRC Employment Regulations — HMRC — Employment status and rights for construction workers
Defines employment status, CIS deductions, and payment requirements for construction labour
Formulas Used
- Regular Labour Cost:
regularCost = totalRegularHours x hourlyRate x numberOfWorkers
Source: Standard payroll calculation - Overtime Cost:
overtimeCost = overtimeHours x (hourlyRate x overtimeRate) x numberOfWorkers
Source: Standard payroll calculation — Default overtime multiplier is 1.5 (time and a half) - Total Labour Cost:
total = regularCost + overtimeCost
Source: Standard payroll calculation - Daily to Hourly Rate:
hourlyRate = dailyRate / hoursPerDay
Source: Standard calculation - Weekly Cost:
weeklyCost = dailyCost x 5
Source: Standard UK construction working week
Key Assumptions
- Standard working day is 8 hours — UK construction industry standard practice
- Standard working week is 5 days (Monday to Friday) — UK construction industry standard practice
- Overtime rate defaults to 1.5x (time and a half) — UK construction industry standard practice
- Monthly cost calculated as 4 weeks (not calendar month) — Standard construction industry budgeting convention