Construction Cash Flow Management: Why Your Bank Account Disagrees with Your P&L

Why Profitable Construction Companies Run Out of Cash

This is the #1 question contractors ask us: "If I'm profitable, where's all the money?" The answer is almost always timing. In construction, the gap between when you spend money and when you collect it creates a cash flow trap that doesn't exist in most other industries.

You Pay Before You Bill

Materials arrive weeks before you can bill for the installed work. Crews get paid every week or two, but your progress billing goes out monthly. Subs want payment within 30 days, but your client's draw schedule might be 45–60 days. You're financing the project with your own cash.

Retainage Locks Up Your Money

5–10% of every progress payment is held as retainage until project completion. On a $500K project with 10% retainage, that's $50,000 you've earned but can't touch for months. Across multiple projects, retainage can lock up $100K–$300K of a contractor's cash. Learn about retainage accounting →

Change Orders Create Ghost Revenue

Approved change orders that haven't been invoiced show up as completed work in your PM software but not in your books. You've spent the money to do the work, but the revenue hasn't been billed or collected. Our average client has $28,400 in unbilled change orders when we first look at their books.

The 13-Week Cash Flow Forecast

This is the tool that solves the problem. A 13-week rolling forecast maps everything coming in and going out for the next quarter. No guessing, no checking your bank balance and hoping.

What Goes Into the Forecast

Cash in: Expected progress billing by project and date, retainage releases scheduled, change orders pending billing, tax refunds, insurance claims.

Cash out: Payroll (weekly/biweekly), sub payments by due date, material draws scheduled, equipment payments, insurance premiums, tax payments, loan payments, overhead (rent, utilities, etc.).

What It Shows You

The forecast highlights cash crunches weeks before they happen. If you see a gap in Week 8, you have 7 weeks to speed up a draw request, delay an equipment purchase, or line up a credit facility. Without the forecast, you find out when the check bounces.

5 Steps to Fix Your Cash Flow

1. Bill faster. Invoice within 48 hours of completed milestones. Every day you delay billing costs you money in carrying costs and credit line interest.

2. Track retainage. Know exactly how much is held, by whom, and when it's due for release. Most contractors have $50K–$200K in retainage they're not actively tracking.

3. Invoice change orders immediately. Don't wait until the end of the job. Bill approved change orders as standalone invoices the same week the work is completed.

4. Build a 13-week forecast. Update it weekly. Share it with your CPA and banker. It transforms how you make decisions about hiring, equipment, and taking on new work.

5. Get fractional CFO support. Cash flow management is exactly the gap between basic bookkeeping and what a fractional CFO provides. We build and maintain the forecast, track retainage, and make sure nothing slips through.