Cash Flow Forecasts & Managing Cash Flow

Cash flow is the lifeblood of any business. Even profitable businesses can fail if they run out of cash. This lesson explains what cash flow is, how to read and construct a cash flow forecast, and the strategies businesses use to manage cash flow.

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What Is Cash Flow?

Cash flow is the movement of money into and out of a business over a period of time.

Term	Definition
Cash inflow	Money coming into the business (e.g. sales revenue, loans, investment)
Cash outflow	Money going out of the business (e.g. rent, wages, raw materials, loan repayments)
Net cash flow	Cash inflows minus cash outflows for a given period
Opening balance	The amount of cash at the start of a period
Closing balance	The amount of cash at the end of a period (= opening balance + net cash flow)

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Cash Flow vs Profit

Cash flow and profit are not the same thing:

Feature	Cash Flow	Profit
What it measures	The actual movement of money in and out	Revenue minus costs over a period
Timing	Concerned with WHEN money is received and paid	Concerned with WHETHER revenue exceeds costs
Example	A business may be owed £10,000 but not have received the cash yet	The same business shows £10,000 profit on paper

A business can be profitable on paper but still run out of cash — for example, if customers are slow to pay. This is why cash flow management is critical.

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Cash Flow Forecasts

A cash flow forecast is a prediction of the expected cash inflows and outflows over a future period (usually monthly for 12 months). It helps businesses plan ahead and identify potential cash shortages.

Example Cash Flow Forecast

Item	January	February	March
Cash Inflows
Sales revenue	£10,000	£12,000	£15,000
Loan	£5,000	—	—
Total inflows	£15,000	£12,000	£15,000
Cash Outflows
Raw materials	£4,000	£5,000	£6,000
Wages	£3,000	£3,000	£3,000
Rent	£2,000	£2,000	£2,000
Equipment	£8,000	—	—
Total outflows	£17,000	£10,000	£11,000
Net cash flow	(£2,000)	£2,000	£4,000
Opening balance	£3,000	£1,000	£3,000
Closing balance	£1,000	£3,000	£7,000

In January, the business has a negative net cash flow of (£2,000) because it purchased equipment. The closing balance is still positive (£1,000) because it started with £3,000.

flowchart LR
    A["Opening Balance<br/>Cash at start of month"] --> D["Net Cash Flow<br/>Inflows − Outflows"]
    B["Cash Inflows<br/>Sales, loans, investment"] --> D
    C["Cash Outflows<br/>Wages, rent, materials"] --> D
    D --> E["Closing Balance<br/>= Opening + Net Cash Flow"]
    E -.becomes.-> F["Next Month’s<br/>Opening Balance"]
    E --> G{Positive?}
    G -->|Yes| H[Healthy cash position]
    G -->|No| I["Cash shortage<br/>Action needed:<br/>overdraft, chase debts,<br/>delay payments"]

Exam Tip: In the exam, you may need to complete a cash flow forecast by calculating net cash flow or closing balances. Remember: Closing Balance = Opening Balance + Net Cash Flow. The closing balance of one month becomes the opening balance of the next.

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Why Is Cash Flow Important?

1. Pay bills on time — businesses must pay suppliers, staff, and rent on time or face consequences.
2. Avoid insolvency — running out of cash can force a business to close, even if it is profitable.
3. Plan for the future — forecasts help identify when cash may be short and plan accordingly.
4. Secure finance — banks and investors want to see cash flow forecasts before lending or investing.
5. Make better decisions — understanding cash flow helps managers make informed spending decisions.

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Cash Flow Problems

Common causes of cash flow problems:

Cause	Explanation
Overtrading	Growing too fast without enough cash to fund expansion
Allowing too much trade credit	Customers take too long to pay, leaving the business short of cash
Poor stock management	Too much money tied up in unsold stock
Unexpected costs	Unplanned expenses such as equipment breakdown or legal fees
Seasonal demand	Cash inflows vary throughout the year (e.g. a seaside ice cream shop)
High expenditure on fixed assets	Spending large amounts on premises, equipment, or vehicles

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Strategies to Improve Cash Flow

Strategy	How It Helps
Negotiate longer payment terms with suppliers	Delays cash outflows, keeping more cash in the business
Reduce credit terms for customers	Gets cash in faster by requiring earlier payment
Offer discounts for early payment	Incentivises customers to pay sooner
Use a bank overdraft	Provides a short-term cash buffer when the account drops below zero
Reduce stock levels	Frees up cash that was tied up in unsold inventory
Sell unused assets	Generates a one-off cash inflow
Lease rather than buy	Spreads the cost of assets over time rather than paying upfront
Improve marketing to boost sales	Increases cash inflows
Cut costs	Reduces cash outflows

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Summary

• Cash flow is the movement of money into and out of a business.
• Cash flow is different from profit — a profitable business can still run out of cash.
• A cash flow forecast predicts future inflows and outflows to help businesses plan.
• Common cash flow problems include overtrading, slow customer payments, and poor stock management.
• Strategies to improve cash flow include negotiating payment terms, reducing stock, and using overdrafts.

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UK case study: the UK SME cash flow crisis of 2022–2024

Cash flow crises are not just textbook scenarios — they are a daily reality for tens of thousands of UK small and medium-sized enterprises (SMEs). According to research by the Federation of Small Businesses (FSB), around 50,000 UK SMEs closed each year between 2022 and 2024, and poor cash flow was consistently cited as the single biggest cause, ahead of lack of demand or rising costs.