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What is cash flow?

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Updated on: October 7, 2025
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Cash flow shows how much money truly moves in and out of your business during a specific period. For business owners, this is highly significant: a company can show profit but still face difficulties if there is not enough cash available to pay bills.

In this article, we explain the exact meaning of cash flow, what the differences are compared with profit, and the different types of cash flow that exist.

Table of contents:

What is cash flow?

The definition of cash flow is straightforward: the difference between your income and your expenses over a given period. It shows how much liquidity is available to meet obligations, make investments, or pay off debt. In other words, it represents the net movement of money within your company.

Why is cash flow important for your business?

Cash flow is essential for the overall health of your business. A positive cash flow means more money is coming in than going out. This allows you to pay suppliers, staff, and other obligations on time.

With negative cash flow, the opposite is true: more money leaves the business than enters it. Even when a business shows profit on paper, issues can arise if customers are late in paying.

A clear understanding of what cash flow in finance is prevents unwelcome surprises and ensures you stay in control of your company’s finances.

Cash flow and profit: what is the difference?

Cash flow and profit are often confused, but there is a clear distinction:

  • Profit is the result on paper (revenue minus costs).
  • Cash flow shows how much money is actually available.

Example: you issue an invoice for £ 10,000 to a client. On paper, you record revenue and profit. But until the client pays, that amount is not part of your cash flow. This distinction highlights why cash flow is often a more reliable indicator of your company’s financial position.

The three types of cash flow

In practice, three types of cash flow are distinguished:

  • Operative cash flow: this is the most important form and shows how much money arises from day-to-day business activities, such as customer payments minus fixed costs.
  • Investing cash flow: refers to money spent or received for investments, for example when purchasing new equipment or selling assets.
  • Financing cash flow: concerns money movements linked to loans, dividends, or other financing activities.

Together, these three categories provide a full picture of the financial status of your business.

Example of cash flow in practice

Suppose you receive £ 25,000 from clients this month and pay £ 18,000 in costs and wages. Your cash flow is then £ 7,000. This is a positive result, meaning your business retains funds to invest, reserve, or repay debts.

What is a cash flow forecast?

A cash flow forecast estimates the future movement of cash in and out of your business. It helps you plan ahead, avoid shortages, and ensure there is sufficient liquidity to meet obligations. Forecasting is a vital tool for long-term stability.

Do you want to calculate your own cash flow?

Want to know how to apply this in your own company? In our detailed article, we explain step by step how to calculate cash flow and which formulas you can use.

Article: Cash flow calculation

Manage your cash flow with Payt

With Payt, you always have insight into your financial position. Our software automates credit control, ensuring invoices are paid faster and improving your cash flow over time. Curious about what Payt can do for your business? Download our brochure or schedule a free demo.

Frequently asked questions

By ensuring invoices are paid quicker, keeping fixed costs under control, and following up consistently with clients.

A healthy or cash flow positive situation means more money consistently comes in than goes out, leaving room for investment and unexpected costs.

Cash flow refers to the inflow and outflow of money during a set period, while liquidity is about the cash immediately available.

Many companies calculate this monthly, but for businesses with tight margins or high transaction volumes, weekly calculation may be beneficial.

Free cash flow refers to the cash left after covering operating expenses and capital expenditures. The free cash flow definition highlights funds available for expansion, debt reduction, or dividends.

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By Aida Kopijn

Aida is an accounts receivable management expert at Payt, known for her precision and organisational passion. She ensures every process is perfectly managed and optimised.

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