Most consulting firms don't have a cash flow problem. They have a billing gap problem.The work gets done. The hours get logged, roughly. The invoice goes out, eventually. The client pays, eventually. But somewhere between "work completed" and "payment received," a meaningful slice of revenue quietly disappears. Unbilled time. Scope changes absorbed without a change order. Invoices delayed because someone was busy. Write-downs added at the last minute to smooth over a client relationship.For a firm billing $2 million a year, that pattern costs between $300,000 and $400,000 annually. Not because the work wasn't good. Because the billing system couldn't capture what the work was worth.Most of the content written on this topic is aimed at enterprise PSA buyers with dedicated finance teams. Small and mid-size consulting shops are a different category. They are the 5-to-30-person firms where the partner invoices out of QuickBooks and the team logs time in a spreadsheet. The leakage problem is the same. The diagnosis is the same. The fixes are different in scale and much faster to implement.
Elad Shmilovich
June 30, 2026
