Business plans

A business plan is a written document that describes a business idea and its objectives, and sets out how the business intends to achieve them, including financial forecasts such as a cash-flow forecast.

Financial forecasts (such as the cash-flow forecast and projected profit) show whether the business is financially viable — whether it will generate enough cash to cover its costs and repay any borrowing. They are important because lenders rely on them to decide whether to provide finance, and because they let the owner anticipate problems, such as a cash shortfall, and arrange funds in advance. Without credible financial forecasts, neither the bank nor the owner can judge whether the business can survive.

The first benefit is that a plan helps the business raise finance. Banks and investors almost always require a credible plan before lending, because it provides evidence that the idea is viable and that the loan can be repaid. For a new business with no trading record, the plan is often the only way to obtain the funds needed to start.

The second benefit is that writing the plan forces research and gives focus. To complete the plan the owner must investigate the market, costs and competitors and set clear objectives. This exposes weak assumptions before money is committed and gives the business a sense of direction, reducing the risk of an avoidable failure.

Together these benefits make the new business both more fundable and better prepared, although the plan still depends on the forecasts being realistic.

A bank lends money expecting it to be repaid with interest, so its central concern is the risk that the start-up fails and the loan is lost. A detailed business plan is the bank's main tool for assessing that risk.

First, the financial forecasts — particularly the cash-flow forecast and projected profit — allow the bank to judge whether the business will generate enough cash to meet repayments. If the forecasts show the firm running out of cash, the bank can see the loan is unlikely to be repaid and refuse it, or adjust the terms.

Second, the market research and marketing plan let the bank assess whether demand is realistic, while the management section shows whether the entrepreneur has the skills and experience to run the business. Both reduce the bank's uncertainty about whether the venture is credible.

However, the plan has limits as evidence: it is built on the entrepreneur's own forecasts, which may be over-optimistic, and the future is uncertain. The bank therefore treats the plan as evidence to be scrutinised rather than trusted outright, and is likely to want additional security (collateral) as well.

In conclusion, a bank requires a plan because it provides the structured information needed to assess repayment risk across finance, market and management — but because the forecasts are uncertain, the plan supports the lending decision rather than guaranteeing it.

Producing a detailed business plan has clear value for a small new business. Most importantly, it is usually essential for raising finance: with no trading record, the owner needs a credible plan to persuade a bank or investor to provide the funds to start. Writing the plan also forces research and discipline — the owner must investigate demand, costs and competitors, exposing weak assumptions before money is spent — and provides focus and targets to monitor progress against once trading begins. For a small, inexperienced owner, these benefits directly reduce the risk of an avoidable failure.

However, whether it is worthwhile is not automatic. A detailed plan is time-consuming and may be costly to produce, and a small owner has very limited time and money; that effort has an opportunity cost (e.g. time spent actually finding customers). The plan also rests on uncertain forecasts in a dynamic environment, so it can quickly become outdated and may even create false confidence if the owner follows it rigidly when reality differs. And it offers no guarantee of success — many well-planned small firms still fail.

Judgement. For most small new businesses a business plan is worthwhile, chiefly because finance usually cannot be raised without one and the research it forces improves early decisions. But its value depends on two conditions: the forecasts must be realistic rather than over-optimistic, and the plan must be treated as a living document that is updated as circumstances change. A plan produced only to 'tick a box' for the bank, then ignored, is much less worthwhile than one used continuously to guide and review the business. So the plan is worthwhile provided it is realistic and actively used — and most worthwhile precisely for the inexperienced small owner who benefits most from the discipline it imposes.

Business failure usually means a firm being unable to continue trading — most often because it runs out of cash. A business plan is frequently presented as a key way to reduce this risk, and it does so in important ways, though it can never remove the risk entirely.

How a business plan reduces the risk of failure. First, producing the plan forces research into demand, costs and competitors, so unrealistic ideas are exposed before money is committed — preventing some failures from happening at all. Second, the financial forecasts, especially the cash-flow forecast, help the owner anticipate problems such as a cash shortfall and arrange finance (e.g. an overdraft) in advance, directly tackling the most common cause of failure. Third, the plan gives clear objectives and a benchmark: once trading, the owner can compare actual results with the forecast and take corrective action early. Fourth, it helps raise the finance a new firm needs to survive its loss-making early months. Through all of these, a good plan genuinely lowers the probability of failure.

Why a plan cannot remove the risk of failure. A plan is only as good as its assumptions: if demand or costs are forecast wrongly — and start-up owners are often over-optimistic — the plan can mislead rather than protect. More fundamentally, the business environment involves uncertainty, not just measurable risk: sudden economic downturns, new competitors or technological change cannot be predicted and so cannot be planned away. A plan can also create false confidence, leading an owner to follow it rigidly when circumstances have changed, and it requires the owner to have the skill to execute it — a sound plan poorly implemented still fails.

Weighing it up (criterion). How far a plan reduces failure depends on how realistic the forecasts are, how regularly the plan is updated, and the volatility of the market. In a relatively stable market with realistic, regularly-reviewed forecasts and a capable owner, a plan can reduce the risk of failure substantially. In a highly uncertain, fast-changing market, or where the plan is over-optimistic or written once and ignored, its effect is much smaller.

Judgement. A business plan reduces the risk of failure to a significant but limited extent. It improves decisions, preparation and access to finance — tackling the avoidable, internal causes of failure — but it cannot eliminate failure because it depends on uncertain forecasts in an unpredictable environment and on the owner's ability to act on it. The most defensible conclusion is that a plan lowers the probability of failure rather than preventing it, and does so most effectively when the forecasts are realistic, the plan is treated as a living document, and the market is reasonably stable.