Bookkeeping for founders: The first steps after registering your business

The business registration is signed, and you're ready to go. But this is exactly when the part many founders underestimate begins: bookkeeping. In the first weeks after registration, important decisions and deadlines come up that are hard to fix later. This guide walks you through the first bookkeeping steps for founders, so you're set up cleanly from day 1 - without the tax jargon.

Don't worry: you don't have to become a bookkeeping genius. You just need to know what to do and in what order - and when it makes sense to hand off the paperwork.

What happens right after your business registration

Registering your business with the trade office (Gewerbeamt) is the official kickoff. After that, several things run automatically in the background that you should be aware of:

• The trade office (Gewerbeamt) forwards your registration to the tax office (Finanzamt), the Chamber of Industry and Commerce (IHK) or Chamber of Crafts, and - for certain activities - to additional bodies.
• The tax office (Finanzamt) then usually sends you mail or expects you to get in touch yourself.
• Freelancers (Freiberufler, e.g. journalists, designers, consultants) don't register a business, by the way, but instead register directly with the tax office (Finanzamt).

The most important point: you are required to register for tax purposes within one month of starting your activity. There's a specific form for this - more on that in a moment.

💡 Tip: Don't wait for a letter from the tax office (Finanzamt). The duty to report lies with you. Being proactive avoids delays in getting your tax number (Steuernummer) - and you need that for your first invoice.

The tax registration questionnaire (Fragebogen zur steuerlichen Erfassung)

The first real bookkeeping step for founders is the tax registration questionnaire (Fragebogen zur steuerlichen Erfassung). You fill it out electronically via ELSTER - the paper form was abolished a few years ago, and submission is digital using the official data format. You have one month from the start of your activity to do this.

In the questionnaire, you provide, among other things:

• personal details and the nature of your activity
• your expected turnover and profit in the founding year and the following year (an estimate is enough)
• whether you want to use the small-business rule (Kleinunternehmerregelung) or not
• your bank details for refunds and direct debits
• whether you need a VAT ID number (USt-IdNr.) (relevant for business within the EU)

Based on your details, the tax office (Finanzamt) issues your tax number (Steuernummer). Without it, you can't issue a proper invoice. So plan for a few days to a few weeks of processing time and factor in this deadline if you want to start right away.

💡 Tip: Estimate your turnover in the questionnaire realistically, but not too high. If you set it too optimistically, the tax office (Finanzamt) may set advance tax payments that put unnecessary strain on your young business.

Small-business status: yes or no?

You make this decision directly in the questionnaire - and it has consequences. The small-business rule (Kleinunternehmerregelung) under § 19 UStG exempts you from showing VAT on your invoices and paying it to the tax office (Finanzamt). This saves you the advance VAT return (Umsatzsteuervoranmeldung).

For 2026, these turnover limits apply: your turnover must not have exceeded 25,000 euros in the previous year and must not exceed 100,000 euros in the current year. For a new business without a prior year, what counts is that you stay below the limit. If you exceed the limit, you switch to standard taxation (Regelbesteuerung).

	Small business (Kleinunternehmer)	Standard taxation (Regelbesteuerung)
VAT on invoices	no	yes (usually 19 %)
Advance VAT return (Umsatzsteuervoranmeldung)	not required	monthly/quarterly
Input VAT (Vorsteuer) deductible	no	yes
Well suited for	private customers, few investments	B2B, high initial investments

Rule of thumb: if you sell mainly to private customers and have hardly any expenses, the small-business rule (Kleinunternehmerregelung) is often more convenient. If you invest a lot at the start (equipment, goods, technology) or work mainly with business customers, standard taxation (Regelbesteuerung) is often worthwhile, because you then recover the input VAT (Vorsteuer) you've paid.

Business account and receipts from day 1

A common beginner's mistake: private and business payments run through the same account. This comes back to bite you at the latest when bookkeeping or the tax return is due. Even though a separate business account isn't legally required in every case for sole proprietors, you should set one up - it separates things cleanly and saves you an enormous amount of searching.

Just as important: collect your receipts from the very first day. Every business-related expense can lower your tax burden - but only if you have the receipt. This includes:

• incoming invoices and receipts (materials, software, office, technical literature)
• hospitality and travel receipts
• statements from your business account
• your own outgoing invoices
• contracts that create costs (e.g. rent, insurance, subscriptions)

💡 Tip: Photograph every receipt digitally right away. Thermal paper from till receipts fades after a few months - but bookkeeping needs legible receipts throughout the entire retention period.

GoBD: these basic rules apply to everyone

As soon as you capture and store receipts digitally, the GoBD apply - the "principles for the proper management and retention of books, records, and documents in electronic form." It sounds cumbersome, but at its core it means four simple principles:

• Traceability: every entry must be traceable back to a receipt.
• Immutability: a captured receipt must not be altered later without a trace.
• Completeness: no business transaction is missing.
• Timeliness: receipts are captured promptly, not only at year-end.

In concrete terms: a photo or scan of a receipt is usually sufficient, and the paper original doesn't necessarily have to be kept - provided your capture process is GoBD-compliant and audit-proof. A simple folder on your desktop, where you can delete files at will, doesn't meet this standard. We've explained this in detail in the post Storing receipts digitally in line with GoBD.

Which obligations are due when - the founder's checklist

So you don't forget anything, here are the most important to-dos in a sensible order:

1. ✅ Register your business (or, as a freelancer, register with the tax office (Finanzamt))
2. ✅ Open a business account and separate your payments
3. ✅ Submit the tax registration questionnaire (Fragebogen zur steuerlichen Erfassung) via ELSTER (within one month)
4. ✅ Decide on small-business status yes/no
5. ✅ Wait for your tax number (Steuernummer) - only then issue correct invoices
6. ✅ Apply for a VAT ID number (USt-IdNr.) if you plan to do business within the EU
7. ✅ Collect receipts from day 1 and file them digitally in a GoBD-compliant way
8. ✅ If you're liable for VAT: submit the advance VAT return (Umsatzsteuervoranmeldung) on time (often monthly in the first years)
9. ✅ Keep retention periods in mind (invoices and accounting records generally for several years)

For many founders, the cash-basis P&L (EÜR) is sufficient as a way to determine profit - a simple comparison of income and expenses. Only above certain turnover and profit limits, or in the case of a GmbH, does double-entry bookkeeping with a balance sheet come into play.

Why you should hand off bookkeeping early

In the founding phase, your time is your scarcest resource. Every hour you spend sorting receipts and puzzling over advance returns is an hour you're not spending on customers and growth. That's exactly why it pays to put bookkeeping in professional hands early - not only once the chaos has already arrived.

With Buchführungsheld, you simply upload your receipts, real bookkeepers post everything correctly, and the advance VAT return (Umsatzsteuervoranmeldung) is included at a fixed price. Especially in the startup phase, a dedicated point of contact helps you with exactly the questions covered here: small-business status or not, which receipts count, which deadline applies when. You can see how this works in detail and what it costs on the Pricing page. If you'd rather talk first, book a free preliminary consultation.

Frequently asked questions

How long do I have after registering my business to submit the tax registration questionnaire (Fragebogen zur steuerlichen Erfassung)?

Usually one month after starting your activity. You submit the questionnaire electronically via ELSTER. Don't wait for mail from the tax office (Finanzamt) - the duty to report lies with you.

Should I choose the small-business rule (Kleinunternehmerregelung) as a founder?

That depends on your business model. With mostly private customers and few expenses, it often makes sense. With high initial investments or B2B business, standard taxation (Regelbesteuerung) is usually worthwhile, because you can then recover input VAT (Vorsteuer). For 2026, the limits are 25,000 euros (previous year) and 100,000 euros (current year).

Do I need a business account as a sole proprietor?

Legally, it isn't mandatory in every case for sole proprietors, but it's strongly recommended. A separate account keeps your bookkeeping clear, saves time, and avoids disputes with the tax office (Finanzamt) over private and business payments.

Do I have to keep paper receipts if I scan everything digitally?

In many cases, no - a GoBD-compliant, audit-proof scan is usually sufficient. What matters is that your digital filing is traceable, complete, and immutable. A simple desktop folder doesn't meet this standard.