Job Cost Calculator for Contractors

The numbers behind your pricing

Job costing is the discipline of capturing every cost a job generates — direct and indirect — so you know what it actually took to deliver it. Direct costs are obvious: materials, labor, subcontractors, equipment. Indirect costs are the silent killers: the overhead of insurance, vehicles, and office that the job consumed a share of. A complete job cost includes both, and a complete price adds profit on top of the complete cost.

This calculator walks you through it in order. Enter each direct cost line and they total automatically. Apply your overhead burden rate as a percentage to fold in indirect costs. Then apply your profit markup to the all-in cost to arrive at a selling price. The result is a quote that's built to actually make money, not just keep the crew busy.

The most common job-costing error is treating overhead as a 'we'll cover it at the end of the year' item. In practice, if overhead isn't built into each job's cost, it's never recovered — and the year ends with a revenue number that looks fine and a bank account that doesn't. Allocating overhead per job (even roughly) is what separates contractors who grow from contractors who stay broke while looking busy.

Use this alongside the markup calculator and overhead rate calculator. Overhead rate tells you the percentage to apply. Markup calculator tells you whether the final price produces a healthy margin. Together they turn quoting from a guess into a system — and they're the foundation every profitable contracting business is built on.