Cash flow and the three statements

Companies do not die from negative net income. They die when the bank balance hits zero. The P&L can say you made $200k while cash fell $200k — or the opposite. Cash flow is the discipline of tracking that gap, and the three statements that explain it.

SaaS makes the gap dramatic: customers often pay for a year upfront while accounting recognizes revenue month by month. That timing funds growth when you collect ahead of revenue, and it punishes you when you spend deferred cash like profit.

The three statements are one system. Net income from the P&L flows into equity. The cash flow statement starts from that net income, adjusts for non-cash items and working capital, and produces the change in cash. Ending cash must match the balance sheet.

A tiny month

Start cash $1,000,000. Net loss −$200,000. Depreciation $10,000. Deferred revenue up $80,000. AR up $30,000. Capex −$20,000. No financing.

Operating cash = −200,000 + 10,000 + 80,000 − 30,000 = −$140,000
Net change      = −140,000 − 20,000 = −$160,000
Ending cash     = $840,000

Loss was $200k; cash only fell $160k because deferred revenue and depreciation helped. Net burn for runway is closer to this cash change than to net income.

Annual prepay is the SaaS-specific version of that gap. A customer pays $120k in January; you recognize $10k/month. Cash jumped once. Revenue drips. Growth plus prepaid contracts raises deferred revenue and makes operating cash look better than the P&L. A shift to monthly billing or a churn spike reverses it — cash gets harder while the income statement still looks familiar.

Operators also juggle four top-lines that are not interchangeable: ARR, billings, collections and recognized revenue. Hire against collections and runway, not against ARR alone. And when the bank goes up, ask whether operations earned it or financing wired it.

Concepts in this section

Common mistakes

• Reading net income as burn. Accrual timing is not cash.
• Spending deferred revenue like profit. It is an obligation to deliver.
• Calling a raise "cash-flow positive." Split operating from financing.

Key takeaways

• Profit ≠ cash. The bank does not care about accrual timing.
• The three statements reconcile: P&L → equity and cash flow → ending cash.
• Annual SaaS prepay creates deferred revenue — cash today, revenue over time.
• Working capital can fund or starve growth. Watch days sales outstanding.

Further learning

Accrual income vs cash, then the reconciliation — Khan Academy's pair:

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