Why this matters
Many side businesses start small and choose the Kleinunternehmerregelung almost automatically. That can make sense — but only if your type of customers, revenue, investments, invoices, and growth plans all fit together. Misunderstanding the VAT logic can quickly lead to wrong prices, incorrect invoices, or poor tool choices down the line.
Turn knowledge into a start plan
This guide explains one topic. Whether it is really a priority for you right now depends on your answers in the start plan.
Create start planKleinunternehmer Is Not a Legal Business Structure
The Kleinunternehmerregelung does not mean your business has a special legal form. It is about VAT (Umsatzsteuer). You can start as a sole trader (Einzelunternehmer), a freelancer (Freiberufler), or a civil-law partnership (GbR) and still need to check whether § 19 UStG applies to you.
For your learning path, this means: first roughly sort out your activity and legal structure, then understand registration and tax registration, and only then consciously choose your VAT approach.
The Current Basic Rules Since 2025
Since 2025, revenues under the Kleinunternehmerregelung are VAT-exempt if your total revenue in the previous calendar year did not exceed €25,000 and does not exceed €100,000 in the current calendar year.
This is not an invitation to treat the revenue thresholds as the only decision that matters. The more important question is: does this VAT approach fit your offer, your customers, your investments, and your growth?
If you are starting fresh, you will need to work with estimates when filling out the tax registration questionnaire (Fragebogen zur steuerlichen Erfassung). That is exactly why your prices, expected revenues, and costs should not be completely made up.
What Changes on Your Invoices
As a Kleinunternehmer (small business owner under § 19 UStG), you do not show VAT as a separate line item on your invoices. Instead, your invoice must include a note referencing the VAT exemption under § 19 UStG — stating that no VAT is charged for this service.
This may sound like less work. But you still need complete invoice data, sequential numbering, proof of payment, and proper records. The Kleinunternehmerregelung does not replace bookkeeping or profit calculation.
No Input VAT Deduction Is the Key Disadvantage
When you pay invoices that include VAT yourself, you generally cannot reclaim that VAT as input tax (Vorsteuer) as a Kleinunternehmer. This may not matter if you rarely buy anything. But it can become costly if you invest heavily at the start.
You should look at this carefully if your purchases include goods, machinery, equipment, advertising, software, professional services, photo shoots, packaging, storage, shipping, or expensive gear.
When This Regulation Often Works Well
It often works well for small side business starts with manageable revenues, little upfront investment, and mostly private customers. In that case, a simple all-in price without a separate VAT line can be practical.
It can also be a good fit if you are testing the waters: a small offering, a few orders, first digital products, local services, or creative work alongside your main job.
When You Should Look More Carefully
If you sell to business customers (B2B), plan major purchases, or want to grow quickly, standard VAT taxation (Regelbesteuerung) may fit your later business logic better. Business customers often think in net prices and can reclaim input VAT — while you as a Kleinunternehmer cannot deduct any input VAT yourself.
You should also look more carefully if you use marketplaces, EU-based tools, VAT identification numbers (USt-IdNr.), reverse charge procedures, digital services, or platform billing. What seems like a simple start can suddenly trigger complex VAT questions.
Quick checklist
- Have you realistically estimated your expected revenues?
- Are you selling mainly to private customers or to business customers?
- Are you planning significant upfront investments that include VAT?
- Do you know what your invoices need to look like?
- Are you using platforms, EU-based service providers, or international tools?
- Do you understand that not showing VAT on an invoice is not the same as having no tax obligations?
Common mistakes
- Confusing the Kleinunternehmerregelung with a legal business structure.
- Knowing the revenue thresholds but ignoring investments and input VAT.
- Writing invoices without the required reference to the VAT exemption.
- Noticing VAT issues with EU tools or marketplaces too late.
- Not documenting income properly because no VAT is shown on invoices.
Frequently asked questions
Is the Kleinunternehmerregelung automatically the better choice?
Not automatically. It can simplify your start, but if you have significant input VAT amounts, B2B customers, or planned investments, the decision may look different.
Do I still need to write invoices as a Kleinunternehmer?
Yes. If you issue invoices, they must be properly structured. The main difference is that no VAT is shown as a separate line item when the Kleinunternehmerregelung applies.
Does the Kleinunternehmerregelung apply forever?
No. It depends on legal requirements and revenue thresholds. These should always be checked against the current rules, as regulations can change.
What this guide can and cannot do
This guide helps with
- help you sort your situation as a learning path: customer type, revenue, investments, invoices, and tools
- help you collect open questions for the tax office (Finanzamt), a tax advisor (Steuerberater), or ELSTER
- check which internal articles are most relevant for your next step
This guide does not replace
- make a binding decision on whether you should choose the Kleinunternehmerregelung
- replace individual tax advice
- give binding assessments of current special cases without official verification