You have $50,000 in your business checking account, so you feel rich. You buy a trailer, upgrade tools, and take a weekend off. Two weeks later you realize $40,000 of that money was already spoken for — materials for the next job, sub draws, and taxes. Now you are in a cash crunch. This is one of the most common traps in construction.
Profit vs. Cash Flow
Profit is what is left after you pay the bills for a job. Cash flow is the timing of when money moves in and out of your account. A job can be profitable on paper and still wreck you if you pay for materials upfront and the client pays 30 days after completion. Negative cash flow kills more construction businesses than bad workmanship.
The 'Float' Trap
Using the deposit from Job B to pay for materials on Job A works until Job C gets delayed. Once the cycle breaks, you are stuck with bills you cannot pay and a reputation you cannot fix. The fix is project accounting: track every dollar to the job it belongs to. Collect a deposit upfront and have a system for getting paid on time to keep cash flow positive.
A Weekly Cash Flow Snapshot
You do not need fancy software to start. Every Friday, list what is coming in and what is going out in the next 14 days. Include invoices you have sent but not collected, material bills due, payroll, sub draws, and estimated tax payments. If outgoing exceeds incoming, you know what to chase on Monday.
Tax Reserves Are Not Profit
A simple rule that saves a lot of pain: set aside 25–30% of every payment for taxes before you spend anything else. Put it in a separate account so you are not tempted. That money was never yours to spend.
Cash flow is what keeps the doors open. Track money by job, collect deposits and draws on schedule, and separate tax reserves from spendable cash. Once you are consistently profitable, read our guide on investing contractor business profits instead of letting extra cash sit idle.