Cash-Flow Fundamentals
Cash Flow vs Profit: Why You Can Be Profitable and Broke
Short answer
Profit is revenue minus expenses on your P&L — it includes invoiced sales you have not collected yet. Cash flow is the actual money moving in and out of your bank account. A business can be profitable on paper and still go bankrupt if customers do not pay fast enough.
Most small businesses that fail are profitable when they close. They simply ran out of cash. Understanding the difference between profit and cash flow is the most important financial skill for a service business owner.
A simple example
You complete a $10,000 job in March. Materials cost $4,000 paid upfront. Profit on the job: $6,000.
But the customer pays net-60 on May 15. Your March P&L shows +$6,000 profit. Your March bank account shows −$4,000.
If payroll, rent, and your own paycheck come out in April — you can be sunk before that profit ever lands.
The three numbers to watch weekly
- Cash on hand (operating + tax savings, separately)
- Accounts receivable (what customers owe you, by age)
- Upcoming fixed costs in the next 30 days
Frequently asked questions
Which matters more, profit or cash flow?
Cash flow keeps you in business; profit makes you wealthy long-term. Manage cash flow first, optimize profit second.
Cash flow you can see.
Glo Invoice surfaces AR aging, upcoming cash, and overdue invoices on one dashboard — free for 14 days.
Sources & further reading
Primary sources we consulted when writing and reviewing this guide.