Labour Cost Calculator
Enter the working details below to calculate total labour costs.
Guided Mode (DIY-friendly)
Fill time first, then rates, then review before calculating.
Time
Rates
Review
Work Time
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