South Dakota Prevailing Wage Project Cost Calculator
Estimate total labor costs for South Dakota prevailing wage (Davis-Bacon equivalent) public works projects, including base wages, fringe benefits, employer payroll taxes, overhead, and profit markup.
Formulas Used
Regular Base Wages = Base Wage Rate × Regular Hours (≤40/wk) × Workers × Weeks
Overtime Base Wages = Base Wage Rate × 1.5 × OT Hours × Workers × Weeks
Fringe Benefits = Fringe Rate × Total Hours (reg + OT) × Workers × Weeks
Gross Labor = Regular Base Wages + Overtime Base Wages + Fringe Benefits
Employer Payroll Taxes = (Regular + Overtime Base Wages) × Payroll Tax Rate
Total Labor Burden = Gross Labor + Employer Payroll Taxes
Overhead = Total Labor Burden × Overhead Rate
Cost Before Markup = Total Labor Burden + Overhead
Profit Markup = Cost Before Markup × Markup Rate
Total Bid Price = Cost Before Markup + Profit Markup
All-In Cost per Hour = Total Bid Price ÷ Total Hours
Assumptions & References
- Wage rates shown are illustrative examples based on U.S. Department of Labor Wage Determinations for South Dakota (WD General Decision SD20240001 series). Always verify current rates at SAM.gov or the DOL Wage Determinations Online portal.
- Typical employer payroll tax rate: FICA 7.65% + FUTA 0.6% + SD SUTA ~1.0% ≈ 9.25% (SD SUTA rate varies by employer experience rating; see SD Department of Labor & Regulation).