Job Costing for Contractors in QuickBooks

Job costing is the practice of assigning every cost – labor, materials, subcontractors, equipment, and burden – to the specific job that incurred it, so you can compare actual cost against estimate per job. For contractors, it is the difference between knowing which jobs make money and guessing at year end.

Key Takeaways

• Most contractor QuickBooks files are set up for tax filing, not job costing, and the two need different structures.
• Labor burden is the most commonly missed cost. Gross wages alone understates job labor substantially.
• If costs are only coded to accounts and not to jobs, no report will ever show job margin.
• Job costing is only useful if it is current. A correct report delivered after the job closes changes nothing.

Why Doesn’t My QuickBooks Show Job Profitability?

Almost always one of four reasons:

1. Costs are coded to accounts but not to customers or jobs. The P&L is right; the job report is empty.
2. Payroll posts as a lump sum. Labor is the largest cost on most jobs and it never reaches the job.
3. Burden is ignored. Only gross wages get costed, so every job looks more profitable than it is.
4. No item or phase structure. Everything lands in one bucket per job, so you can see the job lost money but not where.

How Should a Contractor Set Up QuickBooks for Job Costing?

The structure matters more than the software. A workable setup needs:

• Customer and Job hierarchy – each job as a sub-job of the customer, not a separate customer
• Items, not just accounts – items carry the cost/income detail that accounts cannot
• Phases or cost codes – labor, materials, subs, equipment, other, at minimum
• Time tracking that reaches payroll – hours coded to job and phase at entry, not reconstructed later
• Burden rate applied – taxes, workers comp, benefits loaded onto costed labor

What Is Labor Burden, and Why Does It Matter So Much?

Labor burden is everything an hour of labor costs you beyond the wage itself: employer payroll taxes, workers compensation premium, general liability, benefits, and paid time off. A crew member at $30 an hour does not cost the job $30 an hour.

Contractors who cost only gross wages systematically overstate job margin. The error is invisible on any single job and material across a year of them.

Job Costing vs Process Costing

Job costing tracks cost by discrete job or project, and suits construction, custom manufacturing, and professional services. Process costing averages cost across continuous, identical output, and suits refining, food production, and chemicals. Contractors want job costing. If a system is averaging your costs across jobs, it is answering a question you did not ask.

What We Do

• Rebuild the customer, job, item, and phase structure in QuickBooks Online or Desktop
• Connect time tracking so hours land on jobs and phases at entry
• Calculate and apply a labor burden rate
• Code subcontractor, material, and equipment costs to jobs
• Produce job cost reports monthly, while jobs are still open
• Reconcile job cost detail back to the general ledger so both agree

Frequently Asked Questions About Job Costing

What is job costing in construction?

Job costing is assigning every cost incurred – labor, burden, materials, subcontractors, and equipment – to the specific job that caused it, so actual cost can be compared to the estimate for that job. It produces gross margin per job rather than only company-wide profit.

Can QuickBooks Online do job costing for contractors?

Yes, if it is structured for it. That means sub-jobs under customers, items rather than bare accounts, cost codes or phases, time tracking that reaches payroll, and burden applied to labor. Out of the box, a standard QuickBooks file is set up for tax reporting and will not produce useful job margin.

What is labor burden and how is it calculated?

Labor burden is the cost of an hour of labor above the wage: employer payroll taxes, workers compensation, liability insurance, benefits, and paid time off. It is expressed as a percentage added to the base wage, and it varies by trade, state, and workers compensation classification.

Why is my job costing report different from my P&L?

Usually because some costs were coded to an account without a job attached, so they appear in the profit and loss but never reach any job. The two reports should reconcile. When they do not, the gap is the amount of cost that is not being tracked to work.

How often should job cost reports be reviewed?

Monthly at minimum, and weekly on large or fast-moving jobs. The purpose of job costing is to catch a job going wrong while there is still time to respond. A report produced after closeout is a history lesson.

Get Job Costing That Actually Reports

If your books tell you the company made money but not which jobs made it, the structure is the problem, not the software.

We rebuild contractor QuickBooks files so job cost reports are accurate, current, and reconciled to the general ledger. See also construction bookkeeping and construction payroll.