cashflow
Cash Flow
Actual money moving in and out of the business. The metric that decides survival.
Definition
Cash flow is the real movement of money in and out of the business in a given period, distinct from accounting profit. A business can post a profit while running out of cash - profitable invoices that have not been paid yet are revenue but not cash. Cash flow is split into three streams: operating (the core business), investing (asset purchases / disposals), and financing (loans, equity, owner draws). The single most important number for any small business is operating cash flow. When operating cash flow goes negative for several months in a row, the business is dying even if the P&L still looks fine.
Operating, investing, and financing cash flow
The US cash flow statement splits into three streams. Operating cash flow (OCF) is cash generated from running the business: collections from customers, minus payments to suppliers, payroll, rent, and taxes. Investing cash flow covers capital expenditures (laptops, equipment, real estate) and asset disposals. Financing cash flow covers loans drawn or repaid, equity raised, owner draws, and distributions. The single most important number for any US small business is operating cash flow. Investing and financing can flatter the bank balance temporarily, but only OCF tells you whether the business itself produces cash. Healthy businesses have positive OCF that exceeds capital expenditures, producing positive free cash flow.
Why cash flow diverges from profit
Three forces drive the gap. First, accrual accounting recognizes revenue when earned and expenses when incurred, while cash moves on payment terms. A 50K invoice issued in March on net-60 terms is March revenue but May cash. Second, working capital changes consume or release cash silently: rising receivables, growing inventory, and prepaid expenses all eat cash without showing on the P&L. Third, principal repayments on loans are cash outflows but not expenses, while depreciation is an expense but not a cash outflow. The indirect cash flow statement reconciles these in a structured way. Run it monthly alongside your P&L; the two together tell the truth.
Tools US founders use to manage cash flow
For under 1M revenue, a Google Sheets or Excel 13-week cash flow model updated weekly is enough. Pull bank balance from your business checking, list expected inflows by client and outflows by category for the next 13 weeks, calculate weekly net change and ending balance. For 1M to 10M, dedicated tools like Float, Pulse, Cashflow Frog, or Fathom integrate directly with QuickBooks and Xero and produce rolling forecasts automatically. For 10M plus, mid-market platforms like Vena, Cube, or Jirav offer scenario modeling and stress testing. Whatever the tool, the discipline is weekly review and conservative inflow assumptions. Tools amplify discipline; they cannot create it.
Cash flow stress tests every US founder should run
Three scenarios to model quarterly. One, your largest customer (top 1 to 3 by revenue) leaves with 30 days notice. How many months can you survive on remaining business? Two, a key receivable goes 60 days late. Can you still make payroll? Three, revenue drops 30 percent for two quarters (recession scenario). What expenses get cut, in what order, and how long until cash zero? Document each scenario as a written plan, not a vague mental model. The 2020 COVID liquidity crisis caught most US small businesses unprepared because none of them had run these tests in advance. The PPP saved the ones that survived; the others did not survive.
FAQ
Why can a profitable business run out of cash?
Three common patterns. One, fast growth: a business that doubles revenue from 500K to 1M typically needs to double its receivables and inventory, which consumes cash even though the P&L looks great. Two, slow collections: profitable invoices that customers pay 90 days late tie up cash needed for payroll and rent. Three, capital expenditures and loan principal: buying equipment or repaying debt drains cash without touching profit. The fix is always the same: pair the P&L with a 13-week cash forecast and watch working capital.
How much cash reserve should a US small business hold?
The standard benchmark is 3 to 6 months of operating expenses in a business checking or money market account. Below 3 months is fragile; below 1 month is an emergency. Above 12 months is usually too much idle cash that should be reinvested or distributed. Adjust for revenue volatility: a stable SaaS business with 95 percent NRR can run on 3 months of reserves; a project-based agency with quarterly client turnover needs 6 to 9 months. Build the reserve incrementally; do not raise debt to create it.
Should I use cash-basis or accrual accounting?
For US tax purposes, businesses with under 27M average gross receipts (2024 threshold) can use cash-basis. Most sole proprietors and small LLCs do. For management accounting and any conversation with investors, lenders, or potential buyers, accrual is mandatory because it produces matched revenue and expenses. The practical answer: file taxes on cash-basis if eligible, but run management reports on accrual via QuickBooks Online Advanced or Xero. The split adds modest complexity and dramatic clarity.
What is free cash flow and why does it matter?
Free cash flow (FCF) is operating cash flow minus capital expenditures. It represents cash available to repay debt, pay dividends or distributions, buy back equity, or reinvest in growth. FCF is the metric mature investors anchor on because it cannot be manipulated by accrual accounting tricks. For a US service business, FCF and OCF are nearly identical because CapEx is small. For capital-intensive businesses (manufacturing, e-commerce with warehouses, hardware), FCF is materially lower than OCF and matters more.
How often should I review cash flow?
Weekly is the minimum for any business with under 12 months of runway. Daily during a crunch. The Monday morning 13-week forecast update is the most leverage-positive financial habit a founder can build: takes 15 to 30 minutes, catches problems 8 to 12 weeks before they become emergencies, and forces honest assessment of pipeline and collections. Founders who skip this exercise discover cash problems through bounced payroll, which is two months too late to fix without pain.
In your business
- →Reconcile cash position weekly, not monthly
- →If profit is positive but cash is negative, chase collections before chasing sales
- →Forecast 13 weeks ahead so you see crunches before they hit