The Real Cost of Bad Job Costing for NJ General Contractors
I have had this conversation more times than I can count. A contractor calls me, revenue is up, the backlog looks healthy, but somehow there is never enough cash. They are busy, they are billing, and yet at the end of every month the bank account feels like it should be bigger than it is. When I dig into the books, the answer is almost always the same: they have no idea which jobs are actually making money.
What Job Costing Actually Means
Job costing means tracking every dollar of cost — labor, materials, subcontractors, equipment, overhead — against a specific job number. It means comparing those actual costs to what you estimated when you bid the job. And it means doing this in real time, not six months after the project closes when there is nothing you can do about it anyway.
When job costing works, you know at any point in a project whether you are on budget, running over, or ahead. You know which types of work you are consistently good at pricing and which ones you keep underestimating. You know which project managers are running tight ships and which ones are bleeding margin on every job.
The Hidden Costs of Getting It Wrong
When contractors do not track job costs properly, several things happen — all of them expensive. First, you end up repeating the same pricing mistakes over and over. If you consistently underprice commercial interiors because you do not track what they actually cost you, you will keep winning those jobs and losing money on every one of them. Second, you cannot have honest conversations with your project managers about performance because you do not have the numbers to back up the conversation. Third, and most expensively, you take on more work to cover cash flow problems that are actually caused by losing money on existing jobs.
I have seen contractors doing $8 million a year who are less profitable than when they were doing $2 million. They got busier. They hired more people. Their overhead went up. But their margins never improved because they never fixed the underlying job costing problem. They were always guessing.
How to Fix It Starting Today
The first step is getting your books set up correctly. That means a chart of accounts built for construction, job numbers assigned to every project, and every cost coded to the right job from day one. The second step is choosing the right software — QuickBooks can work for smaller contractors, but once you are managing multiple jobs with subcontractors and complex billing, Sage 100 Contractor gives you far more control.
The third step is having a bookkeeper or accountant who actually understands construction — not just someone who knows debits and credits, but someone who understands the difference between a cost code and a cost type, who knows how to handle retainage receivable, and who can read a job cost report and tell you what it actually means for your bottom line.
At BMS Books, this is what we do every day for NJ and NYC general contractors. We set up your job costing from the ground up, keep it clean month after month, and give you the reports you need to actually run your business instead of just guess at it. If you are ready to stop flying blind, call us at 862-453-8884 or visit bmsbooks.com to schedule a free consultation.
