Learn the numbers behind the calculators
These guides are organized around the decisions a contractor makes before, during, and after a job. Each guide explains the formula, shows a practical example, identifies common exclusions, and links to the matching calculator or free worksheet.
Calculate Construction Job ProfitCost, price, profit, and margin in one workflow.Estimate vs. Actual Job CostingClose the loop after the work is complete.Construction Overhead CostsWhat belongs in an overhead allocation.Markup vs. MarginWhy the same percentage produces different prices.Price a Job for Target MarginTurn full cost into a defensible quote.Construction Labor BurdenBuild true hourly cost from verified records.Wage vs. Burdened RateSeparate worker pay from employer cost.Workers’ Comp and Labor CostWhy one universal percentage is unsafe.Price a Change OrderRecover direct cost, overhead, and profit.Change Order ChecklistDocument scope, schedule, price, and approval.Prevailing Wage and Fringe BenefitsA safe starting point for public work.State Payroll CostsWhat changes by state and by business.Labor Cost: CaliforniaWorkers’ comp and payroll basics with official links.Labor Cost: TexasWhy coverage is usually optional—and what still costs.Labor Cost: FloridaConstruction coverage starts at one employee.Labor Cost: New YorkCoverage, payroll, and prevailing-wage basics.
Read contractor Insights for the situations behind these numbers.
MarginJob provides educational planning tools, not accounting, payroll, tax, insurance, legal, or contract advice. Use current project documents and qualified local professionals for final decisions.