It's possible to be profitable on paper and still run out of cash. That gap is exactly what cash flow measures: the actual timing of money moving in and out of your business.
Why the distinction matters
Profit is calculated over a period, but cash arrives and leaves on its own schedule. A large invoice that hasn't been paid yet counts toward your profit, but it isn't cash you can use to pay rent or payroll today.
Common causes of cash flow problems
- Customers paying invoices late
- Too much cash tied up in unsold inventory
- Seasonal dips in revenue
- Upfront costs for growth outpacing incoming cash
Quick check: If you can answer "how much cash do I have available right now, and what's due in the next 30 days?" at any moment, you're in a strong position to manage cash flow proactively.
Reviewing a simple cash flow report regularly — weekly if your margins are tight — makes it much easier to spot problems before they become urgent.