Time and Materials
Total billable from hours, rate, and material cost.
Example
You enter
- Hours 20
- Labor rate ($/hr) 50
- Material cost ($) 500
- Overhead (percent) 10
- Profit (percent) 15
You get
- Labor $1000
- Overhead $150
- Subtotal 1650
- Profit $247.5
- Total $1897.5
Details, formula, and sources
Total billable = labor_hours × hourly_rate × (1 + OT_factor) + materials_cost × (1 + markup_pct) + travel.
Engineering-practice billing convention.
No licensed source required. The total is definitional arithmetic; the rates, prices, and markup are the user's own figures, and the contract governs which of them are billable.
Estimate. AHJ and licensed professional govern.
Field names used by the API: hours, labor_rate_per_hour, material_cost, overhead_percent, profit_percent, labor, overhead, subtotal, profit, total