Glossary · Accounting & finance

Cash flow: what is cash flow?

6 min read · Updated on 1 July 2026
Definition Cash flow (or cash flow statement) measures the actual money coming in and going out of a business over a period. Not to be confused with profit (which includes non-cash items like depreciation). Cash flow is the best short-term health indicator for an SME.
The full entry
The essentials in brief
  • Cash flow = cash inflows − cash outflows over a period.
  • 3 types: operating (business activity), investing (asset purchases/sales), financing (loans, dividends).
  • Difference with profit: cash flow excludes depreciation, provisions, uncollected receivables.
  • Positive operating cash flow = cash-profitable activity. This is a SME’s #1 goal.
  • 13-week forecast: SME standard to anticipate cash flow shortages.
I Cash flow vs profit: why ...

Cash flow vs profit: why they differ

It’s the classic SME growth trap: profitable on the income statement but cash-strapped. Why?

Accounting profit includes:

  • Uncollected revenue: an invoice issued generates turnover, even if the customer pays 60 days later.
  • Non-cash expenses: vehicle depreciation (annual charge with no cash outflow), provisions for risks.

Cash flow only measures actual money moving in and out of the bank.

Example: SME in services

  • 2024 revenue: €500k (invoices issued)
  • Expenses: €400k (including €50k depreciation)
  • Accounting profit: €100k

BUT if customers pay on average 90 days and €100k in receivables remain unpaid by 31/12:

  • 2024 cash inflows: €400k (out of €500k billed)
  • 2024 cash outflows: €350k (actual expenses, excluding depreciation)
  • 2024 cash flow: +€50k (vs €100k profit)

If the SME also funds strong growth (+30% revenue = +30% working capital), it can easily show €100k in profit with zero or negative cash flow.

💡
The classic trap
Being profitable doesn’t mean being solvent: you can show €100k in profit and zero cash flow. Cash flow is the only true measure of an SME’s short-term health.
II The 3 types of cash flow

The 3 types of cash flow

1. Operating cash flow (most important for day-to-day management)
All money generated or spent by core business activities: customer receipts, supplier payments, salaries, overheads. A viable SME has a positive operating cash flow over the year. If it’s structurally negative, the business is burning cash—either speed up or pivot.

2. Investing cash flow
Purchases and sales of assets: buying a vehicle (cash outflow), selling obsolete equipment (cash inflow). Typically negative in a growing SME (investing phase), sometimes positive if assets are sold.

3. Financing cash flow
Movements tied to external funding: new bank loan (inflow), loan repayment (outflow), capital injection (inflow), dividend distribution (outflow). Varies by business phase.

Total of all 3 = Net change in cash over the period = difference between bank balance on 1 January and 31 December.

III How to manage cash flow i...

How to manage cash flow in an SME?

1. Build a 13-week cash flow forecast
Weekly table of expected receipts (based on customer deadlines) and expected payments (rent, salaries, suppliers, social charges, VAT, taxes). This is the SME standard – 13 weeks = 1 quarter, a sufficient horizon to anticipate without over-extrapolating.

2. Update every week
Compare actual vs forecast. If variance > 10%, identify the cause (late-paying customer, forgotten expense) and adjust.

3. Identify the 3 biggest risks

  • Which customer accounts for > 20% of turnover? What happens if they pay in 90 days instead of 30?
  • Which month is the tightest (e.g. July with salaries + paid leave + VAT)?
  • Which cost line is the most volatile (energy, subcontracting)?

4. Activate levers in case of strain

  • Factor the largest receivables (cash in 48 hours vs 60 days).
  • Request VAT/social security payment plans (often accepted for temporary difficulties).
  • Bank overdraft or short-term loan (plan ahead, never in an emergency).
  • Postpone non-critical investments.

Good business management software (CRM + invoicing + cash flow tracking) automatically calculates this forecast from signed quotes, issued invoices and known deadlines – a major time-saver vs Excel.

13 wk
the standard SME cash flow forecast horizon
3
flow types: operating, investing, financing
> 10 %
actual vs forecast variance > 10% = investigate the cause immediately

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IV Frequently asked questions

Answers to the questions we get asked most.

What is free cash flow?

Free cash flow (FCF) is operating cash flow minus maintenance capital expenditure (CAPEX). It is the cash available after funding operations and covering necessary investments – so the money that can be used to repay debt, pay dividends or fund growth. A key metric watched by investors and acquirers.

How often should you calculate cash flow?

Three levels: (1) Weekly actuals for day-to-day management (updating the 13-week forecast); (2) Monthly for performance tracking and adjustments; (3) Annual for reporting and financing statements. An SME without weekly monitoring is flying blind and discovers cash strain too late to react.

How can you improve cash flow quickly?

Seven rapid actions (under 60 days): (1) Request 30% deposits on all new deals; (2) Reduce customer payment terms (30 days instead of 60); (3) Automate reminders from day 1 of delay; (4) Offer card payment links (instant receipt vs 30+ days for transfers); (5) Negotiate longer supplier payment terms (60 vs 30); (6) Postpone non-critical investments; (7) Sell dormant stock at cost. Typical gain: -10 to -20 days of working capital requirement in 2-3 months.

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