Free cash flow calculator
Enter net income, non-cash items, and working-capital changes — this cash flow calculator builds operating cash flow using the indirect method and shows free cash flow after capex, updated live, as you type.
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Estimates only. Does not account for taxes, fees, or variable returns. Past performance does not guarantee future results.
Results are estimates. Consult a professional.
How the operating cash flow calculator works
Operating Cash Flow (OCF) measures the actual cash a business generates from its core operations — as opposed to net income, which includes non-cash accounting entries and ignores working capital movements. The indirect method (the most common presentation) starts with net income and adjusts for items that affect income but not cash, then adjusts for changes in working capital accounts that affect cash but not income. The result is the cash the business actually collected and spent during the period.
OCF consistently exceeding net income is a healthy sign: depreciation adds back cash that was spent in a prior period, so capital-intensive businesses often have OCF well above net income. Conversely, fast-growing businesses often have OCF below net income because growth requires cash to build up receivables and inventory. Neither pattern is inherently bad — the gap must be understood in context.
FASB Accounting Standards Codification 230 — Statement of Cash Flows.Worked example: manufacturing company OCF reconciliation
A mid-size manufacturer reports $500,000 net income for the year. They also have $150,000 in depreciation and $25,000 in amortization. Working capital changes: accounts receivable increased by $80,000, inventory increased by $40,000, and accounts payable increased by $30,000. Capex for new equipment was $200,000.
OCF patterns by company type
The relationship between OCF and net income varies dramatically by business model. Knowing your company's archetype helps set realistic expectations for cash generation and explains why reported profits may not match available cash.
| Company Type | D&A / Revenue | Working Capital Trend | OCF vs Net Income | Key Driver |
|---|---|---|---|---|
| Mature Manufacturer | 8–12% | Stable / modest growth | OCF significantly > NI | Large D&A from heavy equipment base adds back to cash |
| High-Growth SaaS | 2–4% | Deferred revenue ↑ | OCF > NI | Customers prepay subscriptions; cash received before revenue recognized |
| Retailer / Distributor | 1–3% | Inventory grows with sales | OCF < NI | Inventory buildup absorbs cash faster than profits accumulate |
| Professional Services | <1% | AR moves with billings | OCF ≈ NI | Minimal fixed assets; AR collection timing is the main swing factor |
| Asset-Light Tech (mature) | 1–2% | Minimal WC changes | OCF ≈ NI | High margins, low capex, stable WC — cash closely mirrors earnings |
Source: Corporate Finance Institute; FASB ASC 230 working capital classification standards.
Tips for managing and analyzing cash flow
Profitable businesses go bankrupt every year — because profit is an accounting construct and cash is what pays suppliers, employees, and lenders. Monitoring OCF monthly (not just quarterly) and understanding the gap between earnings and cash is one of the most important financial disciplines for business owners.
- Watch the OCF-to-Net-Income ratio — A healthy, asset-light business should have OCF/NI ≥ 1.0 consistently. A ratio persistently below 0.8 means working capital is consuming cash faster than the business can generate it — a warning sign for growing companies.
- Track Days Sales Outstanding (DSO) — DSO measures how long it takes to collect receivables: (AR ÷ Revenue) × 365. An increasing DSO erodes OCF even when revenue grows. Implement clear payment terms and follow up on overdue invoices before they become bad debt.
- Separate operating, investing, and financing cash flows — The three-section cash flow statement reveals how money is actually moving. A business funding operations from financing (borrowing) rather than operating activities is burning cash, not earning it.
- Use FCF, not OCF, for business decisions — OCF doesn't account for the capex needed to maintain productive assets. Free Cash Flow (OCF minus maintenance capex) is the cash genuinely available for debt repayment, dividends, and growth investment.
- Build a 13-week rolling cash flow forecast — Monthly cash flow statements are backward-looking. A 13-week rolling forecast (updated weekly) gives you early warning of cash shortfalls 90 days out — enough time to arrange a credit line before a crisis hits.
Accuracy and limitations
This calculator uses the indirect method of calculating operating cash flow, as prescribed by FASB ASC 230 and the most common presentation in financial statements. It does not account for the direct method (which traces individual cash receipts and payments), non-operating items like investment income or debt issuance proceeds, extraordinary or one-time items that may distort a given period's figures, or adjustments for deferred taxes and other complex accounting entries.
Not tax or financial advice. Cash flow analysis is a foundational financial skill, but the definition and classification of line items can vary significantly between industries, accounting standards (GAAP vs. IFRS), and individual company presentations. For authoritative financial analysis, audited financial statements prepared under applicable accounting standards and reviewed by a CPA are required.
Cash flow terms defined
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