| Input | Scenario A | Scenario B |
|---|---|---|
| Employees | 45 | 48 |
| Hourly wage | 18.50 | 19.20 |
| Hours per week | 40 | 40 |
| Overtime hours per week | 3 | 2 |
| Overtime multiplier | 1.50 | 1.50 |
| Shift differential per hour | 0.75 | 0.75 |
| Benefits % | 18% | 19% |
| Payroll taxes % | 9% | 9% |
| Training cost per employee (monthly) | 35 | 40 |
| Hires per month | 1.2 | 1.0 |
| Recruiting cost per hire | 900 | 900 |
| Absenteeism % | 3% | 2.5% |
| Productivity loss premium % | 15% | 15% |
- WeeksPerMonth = 4.333
- BaseHours = Employees × HoursPerWeek × WeeksPerMonth
- OvertimeHours = Employees × OvertimeHoursPerWeek × WeeksPerMonth
- BaseWages = BaseHours × HourlyWage
- OvertimeWages = OvertimeHours × HourlyWage × OvertimeMultiplier
- ShiftDiffCost = (BaseHours + OvertimeHours) × ShiftDiffPerHour
- GrossWages = BaseWages + OvertimeWages + ShiftDiffCost
- BenefitsCost = GrossWages × BenefitsRate
- PayrollTaxCost = GrossWages × PayrollTaxRate
- TrainingCost = Employees × TrainingCostPerEmployee
- RecruitingCost = HiresPerMonth × RecruitingCostPerHire
- AbsenceHours = (BaseHours + OvertimeHours) × AbsenteeismRate
- AbsenceCost = AbsenceHours × HourlyWage × (1 + ProductivityLossPremium)
- MonthlyTotal = GrossWages + BenefitsCost + PayrollTaxCost + TrainingCost + RecruitingCost + AbsenceCost
- AnnualTotal = MonthlyTotal × 12
- Enter Scenario A as your current baseline assumptions.
- Enter Scenario B using your proposed staffing and pay plan.
- Adjust overtime, benefits, taxes, and absence to match reality.
- Include hiring and training to capture near-term change costs.
- Click Calculate to view totals and the monthly difference.
- Download CSV for spreadsheets or PDF for sharing.
Labor cost modeling for monthly visibility
This calculator estimates total labor cost per month and per year by converting weekly hours into monthly hours using a 4.333 weeks-per-month factor. That standardization makes scenario comparisons consistent when calendar months vary. The output table separates base wages, overtime wages, and shift differentials so you can see what portion of spend is fixed versus schedule-driven. Use it to support budget cycles, workforce plans, or cost-to-serve reviews for executive reporting needs.
Staffing and wage assumptions that drive totals
Start with headcount and hourly wage for each scenario. Headcount multiplies every cost driver, so even small changes can dominate the difference line. Hourly wage affects base pay, overtime pay, and the valuation of lost hours from absence. If you have mixed pay bands, enter a weighted average wage and validate it against payroll reports. Cost per employee helps benchmark teams of different sizes.
Overtime, shift premiums, and scheduling risk
Overtime is modeled as additional weekly hours paid at an overtime multiplier, often 1.5 or 2.0. Reducing overtime can offset wage increases when staffing improves coverage. Shift differential applies to both base and overtime hours, reflecting premiums for nights or weekends. If schedules change frequently, test multiple overtime and differential combinations to quantify sensitivity before committing to a roster design.
Indirect costs: benefits, taxes, training, recruiting
Benefits and payroll taxes are applied as percentages of gross wages, which include shift premiums. This approach approximates how many employers allocate statutory and benefit burden. Training cost per employee captures recurring enablement, compliance, or onboarding refreshers. Recruiting cost is modeled as hires per month times cost per hire, useful for growth or turnover situations. Together, these inputs prevent underestimating true fully-loaded labor.
Absence impact and scenario decision signals
Absenteeism is calculated as a percentage of total scheduled hours, then valued at hourly wage. The optional productivity-loss premium increases that cost to reflect disruption, coverage gaps, or quality impacts. Compare monthly and annual differences to balance near-term cashflow and long-term budget exposure. When Scenario B lowers absence or overtime, it may justify higher wages through reduced operational volatility.
What should I use for hourly wage if pay bands vary?
Use a weighted average hourly wage across roles in the scenario. Weight by expected hours or headcount share, then compare the implied monthly gross wages to payroll history to confirm the average is reasonable.
Why does the calculator use 4.333 weeks per month?
It converts weekly schedules into a stable monthly estimate by averaging weeks across a year. This avoids distortion from months with different day counts and supports consistent scenario comparisons.
How do I interpret the overtime multiplier?
The multiplier scales the hourly wage for overtime hours. For example, 1.5 means overtime pay equals 150% of the base hourly wage. Adjust it to match policy, contracts, or local rules.
Do benefits and payroll taxes apply to shift premiums and overtime?
In this model they apply to gross wages, including overtime and shift differential. If your benefit burden excludes some elements, reduce the percentage or model exclusions by lowering the inputs.
How does absenteeism cost work here?
Absenteeism is a percentage of scheduled hours valued at hourly wage. The productivity-loss premium can increase that cost to reflect disruption, coverage gaps, or quality impacts beyond direct wages.
Can I export results for budgeting workflows?
Yes. Use CSV export to move metrics into spreadsheets and finance models. Use PDF export for sharing assumptions and comparisons with leaders, managers, or external stakeholders.