Job costing vs. bookkeeping: a practical guide for Yakima contractors
If you run a roofing, plumbing, construction or handyman business, your books should help you answer useful questions. Two of those questions are: “How is my business doing?” and “How did that particular job turn out?”
They sound similar, they are similar, but they need different levels of detail - which changes the workload significantly..
The business view and the job view
General bookkeeping organizes your business transactions. Job costing adds another way to look at those records: which job the income and expense belong to - which can tell you how a job performed.
Materials expense tells you what you bought. Connecting that expense to the right project helps you understand where you used it. The same idea applies to labor, subcontractors and equipment rented for a particular job.
Neither view replaces the other. You still need reliable business records, and a job report is only as useful as the information assigned to it. Intuit's overview of construction project accounting explains this distinction between company-wide and project-level records.
A simple example: two jobs, different results
Here is a hypothetical example—not a Courage client result. Assume two completed jobs each brought in $10,000 of revenue, and all their direct costs have been recorded.
Job A: $3,000 in materials, $2,000 in direct labor costs and $1,000 in subcontractor costs. Total direct costs: $6,000. Revenue less those costs: $4,000.
Job B: $4,000 in materials, $3,000 in direct labor costs and $1,500 in subcontractor costs. Total direct costs: $8,500. Revenue less those costs: $1,500.
Together, that is $20,000 in revenue and $14,500 in direct costs. The combined $5,500 does not show you how differently the two jobs performed.
These amounts are before business overhead and other expenses, so they are not the company's final profit. They also do not tell you how much cash is available today.
The useful next step is a question: What was different about Job B? Perhaps the work took longer, materials cost more, or the scope changed. Maybe Job B was roofing, and Job A was finish contracting. The numbers give you somewhere to start looking; they do not tell the whole story on their own.
Make your records easier to connect
A practical starting point is to agree on one job name or number and use it consistently. “Smith roof,” “Smith project” and a street nickname might mean the same thing to you, but someone reviewing the records may not know that.
When you send records to your bookkeeper, consider including:
The job name or number on relevant receipts and bills.
A note when one purchase covers more than one job.
The job connected to an invoice or change in the work.
Questions about costs you are unsure how to assign.
For example, if one receipt includes materials for two projects, add a note explaining the split. If you do not know, flag it instead of guessing. Keep the receipt so the amount and the explanation can be checked together.
Our monthly records checklist for Yakima contractors covers the broader set of records to gather.
Start with one useful question
You do not need to invent a complicated reporting system before talking with your bookkeeper. Start with the decision you want better information for.
For a small contractor in Yakima County, that might be: “Are my material costs coming in close to what I expected?” Or: “Which jobs need a closer review before I price similar work?”
Ask what records would help answer that question, how often to review them, and which costs the report includes. Agree on how shared expenses and your own working time will be treated so you understand the limits of the numbers you are seeing.
Talk through your bookkeeping needs
Courage Bookkeeping works with small-business owners in Yakima County and the Ellensburg area (also remotely). If you want a clearer starting point, tell us about your business and the question you want your books to answer.
You do not need perfect records to start that conversation, and you don’t have to pick bookkeeping, or job costing. You can have both.