How to find and test a business idea that holds up

A business idea that holds up combines something you are good at with a problem that other people will pay to have solved. You find it by collecting your strengths and such problems and matching them up. Then you describe the idea in one or two sentences and test it with five questions and real conversations.

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Contents

1. Do you need an idea before you think about starting a business?
2. What can you become self-employed with?
3. How do you find your business idea?
4. How do you test whether your business idea holds up?
5. Is self-employment right for you?
6. Common mistakes when looking for an idea
7. When can start-up coaching help?
8. Frequently asked questions

Do you need an idea before you think about starting a business?

Not at the start, but before you found. In the KfW-Gründungsmonitor 2026 (in German, chart 2), a specific business idea was the main motive for only 11 % of full-time founders in 2025. Among founders starting on the side, it was 15 %.

Other reasons came first more often. Full-time founders named independence (26 %) and self-fulfilment (21 %), side-business founders a higher income (40 %). So many people first know that they want to be self-employed, and then look for the what.

Doubts about your own idea are common. A good quarter of the 2025 founders (26 %) worried that their business idea was not yet mature (KfW-Gründungsmonitor 2026, chart 17).

What can you become self-employed with?

What you can become self-employed with usually comes from one of four sources:

• Your profession and experience. What you did as an employee, you can often offer on your own. You know the industry, the prices and the customers.
• Problems you notice. Are you annoyed by poor service, a missing solution or long waiting times? Others probably are too.
• Existing offers, done better. An idea does not have to be new. A familiar offer for a specific target group or region is often enough.
• Takeover or franchise. Instead of starting from scratch, you can take over an existing business or run a proven concept as a franchise.

Depending on your starting point, you clarify different questions first:

Starting point	Example	What you clarify first
Professional know-how	graphic design for small firms	Whether you work as a freelancer or run a trade
Craft trade	your own painting business	Whether your trade needs a master craftsman qualification (Annex A HwO, in German)
Teaching	online maths tutoring	How many hours a week you can offer
Online retail	selling your own products	Registration in the packaging register
Takeover	a business without a successor	Offers on the federal succession exchange nexxt-change (in German)

How do you find your business idea?

These four steps take you from a blank page to an idea you can explain to others.

Step 1: Collect your strengths

Write down what you are good at, what others ask your advice on and what you enjoy. Think of expertise, craft skills, languages and contacts. Ten points are a good start.

Step 2: Collect problems

For one week, note everything that bothers you or others. Pay special attention to problems in industries you know. A problem that people already spend money on today is a good sign.

Step 3: Connect the two

Put the two lists side by side. Where can one of your strengths solve one of the problems? This usually gives you two or three ideas worth pursuing.

Step 4: Describe your idea in one or two sentences

Use this pattern: “I offer [what] for [whom] so that [benefit].” An example: “I offer online maths tutoring for students in their final school years so that they go into their exams with confidence.”

If you can do this, you have a business idea. If you can’t, the target group or the benefit is usually missing.

How do you test whether your business idea holds up?

An idea holds up if enough people pay for it and you can make a living from it. These five questions show you where your idea stands:

Question	How to find the answer
Does it solve a real problem?	Ask five to ten potential customers how they solve the problem today.
Would they pay for it?	Ask about a specific price, not about interest.
Who already offers it?	Search online and locally for offers, prices and reviews.
Are you allowed to offer it?	Check permits and the master craftsman requirement with your chamber of commerce (IHK), chamber of crafts or trade office.
Do the numbers work?	Estimate revenue, costs and what you need to live on.

Talk to potential customers

Test your idea in conversations with people who could buy it. Don’t ask whether someone likes your idea. Ask how the person solves the problem today and what it costs them. Friendly approval from acquaintances is no proof. How to turn such conversations into orders later is covered in the guide Vertrieb nach der Gründung (in German).

Look at the competition

Competition shows that there is a market. Think about what you do differently or better, for example on price, service or target group.

Do a rough calculation

Write down how many customers you need per month so that revenue minus costs covers your living expenses. A simplified example without taxes: you need €2,000 a month to live on and have €200 in costs. At €40 per tutoring hour, that is 55 hours a month, or just under 13 a week.

How to set this up properly is covered in the guide Creating a financial plan. If the idea passes this test, the business plan is the next step.

Is self-employment right for you?

Not every good idea has to become a business, and people who do found have doubts too. According to the KfW-Gründungsmonitor 2026 (chart 17), 31 % of the 2025 founders saw the advantages of employment as an obstacle. 28 % worried about a lack of business knowledge.

These questions help you decide:

• Can you live with an uncertain income for a few months?
• Do you like working independently, even without fixed working hours?
• Are you prepared to take care of sales, bookkeeping and admin?
• Do you have people who support you or give you honest feedback?

If you answer several questions with no, that is not a verdict on you. It can mean that you start later, start on the side first or get support.

Common mistakes when looking for an idea

• The idea stays too general. “Something in marketing” is not yet a business idea. Only the target group makes it specific.
• Asking only friends. Acquaintances are polite. Ask people who would actually buy.
• Spending money too early. Logo, website and equipment come after the test.
• Deciding without numbers. An idea can be exciting and still not pay off.

When can start-up coaching help?

If you are registered as unemployed or job-seeking and can describe your idea in one or two sentences, AVGS start-up coaching may be an option. In it, you work out your idea, your business plan and your numbers with a coach. The coaching is in German and requires German at B2 level or above. The Fit Check shows in five questions whether it suits you. The employment agency or job centre issues the voucher at its own discretion.

Frequently asked questions

How many ideas should I test?

Two or three are enough. Test them with the same five questions and then choose the one where the conversations with potential customers went best.

Does my business idea have to be new?

No. A familiar offer for a specific target group or region can work just as well.

Can I protect my idea?

A pure idea cannot be protected. Trademarks, designs and technical inventions can. The German Patent and Trade Mark Office gives first information.

How long does it take to test an idea?

That depends on how quickly you reach potential customers. Plan a few weeks. Once you can answer the five questions, you start on the business plan and the start-up checklist (in German).