Job costing tracks actual labor, material, equipment, and subcontractor costs against the estimate on a per-job basis. The three key numbers: budget, actual to date, and cost-to-complete. Most subcontractors don't have real job costing because QuickBooks can't do it natively, the estimate lives in a spreadsheet disconnected from accounting, and nobody set up cost codes tied to estimate phases. SPM builds job costing through ControlQore in the first 30 days of onboarding. Starting at $1,900/month.

Job Costing 101

Job Costing Explained. What It Is, How It Works, Why You Don't Have It.

Job costing is the only way to know if a job is making money while you still have time to do something about it. Most subcontractors don't have it — not because they don't understand it, but because nobody ever built it for them correctly. Their accounting system records transactions. Job costing compares those transactions to the estimate, by phase, in real time. One is a ledger. The other is a decision-making tool.

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Why Most Subs Don't Have It

Three Reasons Job Costing Doesn't Happen.

Most subcontractors understand that job costing matters. They just don't have it. Here's why.

QuickBooks Isn't Built for It

QuickBooks can track costs by customer or job. But it doesn't have cost codes tied to estimate phases, it doesn't calculate cost-to-complete, and it won't produce a WIP report. Most subcontractors have job names in their books but no actual job costing structure. That's not the same thing.

The Estimate Lives Somewhere Else

The estimate is in a spreadsheet. The accounting is in QuickBooks. The labor hours are in a time tracking app. Nobody ever connected these three systems. So there's no way to compare actual costs to the estimate in real time — because they're in three different places.

No One Set It Up Correctly From the Start

Job costing requires setup work upfront — cost codes, phase structure, the connection between estimate categories and accounting categories. Most small subcontractors never did that initial work. What they have is a transaction ledger that tells them what was spent, not whether that spending is tracking to what was bid.

What Real Job Costing Looks Like

The Three Numbers Every Job Needs.

A properly implemented job costing system gives you three numbers for every active job, updated at least monthly: budget, actual to date, and cost-to-complete. When cost-to-complete starts running over budget, you have a problem — and you have time to fix it.

Cost Code Structure

Cost codes mirror your estimate phases — not generic categories

Labor, material, equipment, and sub costs coded separately

Every cost posted to the job within 48 hours

Cost codes consistent across all jobs — so you can compare performance

Monthly WIP Report

Percent complete vs. percent billed — side by side

Cost-to-complete calculated for every active job

Over/under billing flagged monthly

Updated before pay apps go out — not after

Monthly Job Review

Which jobs are running over budget and why

Labor variance by phase — caught weekly, not at close

Change order status — pending vs. approved, revenue impact

Post-mortem on closed jobs — estimating lessons for next bid

SPM builds and manages all of this through ControlQore — purpose-built for contractors. You don't need to learn new software.

How It Works

Job Costing in Plain English.

Think of job costing as running a separate mini P&L for every active contract. Every dollar that goes into the job gets recorded against the budget for that job. At the end of every month, you can see exactly how each job is performing — not just how the company is doing overall.

Here's a concrete example. You bid a $600K utility job with 18% gross margin — $108K budgeted profit. You estimate 2,400 labor hours at $45/hour fully burdened. At Week 6 your job costing shows 1,400 hours spent on 40% complete work. That's a productivity problem — you should have spent 960 hours to be 40% done. You're 440 hours over pace. At $45/hour that's nearly $20K in unplanned labor cost. You still have 60% of the job left to run.

Without job costing, you find out about that productivity problem at closeout — 18 months from now. With job costing, you find out at Week 6. The difference between those two outcomes is whether you can still fix it. At Week 6 you can retool the crew, modify the approach, or file a change order. At closeout there's nothing to do except absorb the loss.

What You Need to Get Started.

Job costing doesn't require expensive software or a dedicated accounting team. It requires three things: a cost code structure tied to your estimates, a discipline for posting costs to the right job and code, and a monthly review process. SPM handles all three.

Cost codes mapped to your estimate categories — concrete, labor by phase, equipment, subs

Every AP invoice coded to a job and cost code before it's posted

Timesheets coded by job and phase — not just by employee

Monthly WIP reconciliation — percent complete estimated in the field, not assumed from billing

Monthly job profitability review — which jobs made money, which didn't, and what drove the difference

The whole system runs in ControlQore. SPM sets it up in the first 30 days of onboarding, aligned to how you actually bid your work. After that, we maintain it monthly so the numbers are always current.

Frequently Asked Questions

Common Questions.

What is job costing in construction?

Job costing is the process of tracking all labor, material, equipment, and subcontractor costs against the original estimate on a per-job basis. The goal is to know — while the job is still running — whether actual costs are tracking to budget or running over. Without job costing, you only find out a job lost money after it closes, when there's nothing left to fix.

What's the difference between job costing and bookkeeping?

Bookkeeping records what happened — transactions posted to accounts. Job costing tells you what's happening per job in real time — are costs tracking to the estimate, is labor running over on Phase 3, is the cost-to-complete still within budget. You need both. Bookkeeping without job costing tells you how the company is doing. Job costing tells you which jobs are making money and which ones aren't.

What software do subcontractors use for job costing?

Most small subcontractors try to do job costing in QuickBooks using customer or job tracking, but QuickBooks doesn't have cost codes tied to estimate phases, doesn't produce a WIP report, and doesn't calculate cost-to-complete. SPM uses ControlQore — purpose-built for contractors, more affordable than legacy enterprise tools, and AI-infused. It's set up and managed by SPM so clients don't need to learn it.

How do I start job costing if I've never done it before?

Start with your estimate. Break the job into phases that match how you actually bid — earthwork, underground, above-grade concrete, labor by phase. Then assign a cost code to each phase. Every cost — labor hours, material receipts, sub invoices — gets posted to the job and the cost code it belongs to. Compare actual to estimate at least monthly. SPM builds this structure for you in ControlQore.

What is a WIP report and how does it relate to job costing?

A WIP (Work In Progress) report is the monthly reconciliation of all active jobs — it shows percent complete, total costs to date, amount billed, and cost-to-complete for each job. It's how job costing data becomes actionable at the company level. Banks, bonding companies, and surety agents all want to see a WIP report. Without one, you can't prove — to yourself or anyone else — whether your jobs are profitable.