How to put together a business plan that works

A good business plan is not a thick document to be left in a drawer, but a living tool that helps you make decisions. If you want to put together a business plan that really works, it has to be specific enough for you to act on it, and at the same time flexible enough for you to update it when the market changes. In this article, we go through its logical structure and show you what to watch out for.

Why you need a plan at all

A plan serves three groups. For you, it helps verify whether the idea holds together on paper too. To a bank or investor, it shows that you understand your business and the numbers behind it. And it gives your team a common direction. Without a plan, you run your business on gut feeling, which may work for a short while but usually backfires once you grow.

What the plan consists of

A proven structure leads the reader from the big picture to the details. There is no need to invent complicated formats; the content and the internal logic between the sections matter more.

• Summary: a brief overview of the plan that even a layperson can grasp in a few minutes.
• Product or service: what problem you solve and for whom.
• Market and competition: who your customers are and what sets you apart.
• Marketing and sales: how people will find out about you and how they will buy.
• Team and organisation: who does what and which skills are missing.
• Financial section: costs, revenues, cash flow and the break-even point.

The financial section as the heart of the document

It is the numbers that separate a dream from a realistic plan. You do not need to be an economist, but you should be able to estimate fixed and variable costs, expected sales and, above all, the movement of cash over time. Many viable companies fail not because they are unprofitable, but because they run out of cash at the wrong moment. So plan conservatively and build in a buffer.

The most common mistakes

Entrepreneurs often overestimate how fast sales will grow and underestimate the cost of acquiring a customer. Another mistake is having a single optimistic scenario. It is wiser to prepare three scenarios of how things may develop and to know what you will do if reality falls short of expectations.

How to keep the plan alive

The work does not end once the plan is written. A plan only makes sense if you regularly compare it with reality. We recommend going through the key assumptions at least quarterly and adjusting them according to what you have learnt in the meantime. This way, the plan becomes a management tool, not a formality.

Tailor the plan to the reader

A plan you write for yourself will have a different emphasis from one you submit to a bank or investor. An internal plan can be shorter and more of a working document; the numbers and decisions are what matter in it. A plan for an external partner must convincingly explain the opportunity, the team and how the money will be paid back. In both cases, clarity and honest assumptions count for more than attractive graphics. Avoid generic phrases and instead give specific steps, figures and deadlines. The reader will then quickly understand whether you grasp the plan in depth or are merely repeating textbook rules with no connection to your reality.

When to bring in an expert

You can manage the written part yourself, but for the financial model and the tax implications it pays to bring in an accountant. They will help you set realistic assumptions, keep an eye on cash flow and prepare the supporting documents so that they stand up to a bank’s scrutiny too. The investment in a consultation usually pays for itself through fewer costly mistakes at the start.

Related articles: Financial indicators every entrepreneur should track, Cash flow: how to manage the flow of money in a small company, Receivables management: how to avoid non-payers.

Frequently asked questions

How long should a business plan be?

Length is not the goal. For internal purposes, a few pages with clear numbers are enough. If you are submitting the plan to a bank or investor, it tends to be more detailed, but even then clarity and realistic assumptions are more important than the number of pages.

Do I have to update the plan?

Yes. A plan only makes sense as a living document. It is advisable to compare the assumptions with reality at least once a quarter and adjust them. Otherwise, it will quickly become outdated and lose its practical value for decision-making.