Doing your own bookkeeping without a tax advisor: a step-by-step plan for the self-employed

Who self-managed bookkeeping really works for

The first question many people ask: am I even allowed to do my own bookkeeping? For most self-employed people the answer is a clear yes. Tax law distinguishes between two fundamentally different situations.

EÜR or balance sheet: what applies to you

Freelancers (Freiberufler) under § 18 EStG, such as journalists, consulting engineers or graphic designers, may determine their profit with the cash-basis profit statement (Einnahmenüberschussrechnung, EÜR) regardless of their revenue or profit. Trade businesses (Gewerbetreibende), on the other hand, switch to double-entry bookkeeping as soon as they exceed certain thresholds: more than €800,000 annual revenue or more than €80,000 profit. These limits apply to financial years beginning after 31 December 2023. Good to know: the obligation to prepare a balance sheet does not start automatically, but only after a written notice from the tax office (Finanzamt), and it only takes effect from the financial year following that notice.

When a tax advisor still makes sense

For solo self-employed people and small business owners without complex structures, a tax advisor is not a must. Exceptions are business abroad, intra-Community transactions, employees or substantial fixed assets. If you are in one of these situations, you will find a clear assessment at the end of the article of when professional support is worth the money.

What the law really requires of you

Before the first booking entry, the legal framework has to be clear. This is not a catalogue of legal sections, but a pragmatic overview of the obligations that actually matter in day-to-day work.

Retention periods and GoBD-compliant receipt management

Depending on their type, records must be kept for between 6 and 10 years. Since 2025, accounting vouchers and invoices are subject to a shortened period of 8 years (previously 10 years), while books and annual financial statements still have to be kept for 10 years. What matters: digital receipts must be archived unalterable, fully legible and retrievable at any time. A smartphone photo is only enough if it is stored in a GoBD-compliant way. A simple PDF in edit mode does not meet the requirements.

VAT, advance returns and the small business scheme

Anyone liable for VAT files an advance VAT return (Umsatzsteuervoranmeldung) monthly or quarterly, at the latest on the 10th of the following month. Whether monthly or quarterly depends on the previous year’s VAT liability: above €9,000 you file monthly, from €2,001 to €9,000 quarterly. Anyone who owed no more than €2,000 VAT in the previous year can be exempted from advance returns altogether. For 2026: small businesses under § 19 UStG (Kleinunternehmerregelung) are exempt from advance returns as long as the previous year’s revenue does not exceed €25,000 and the current year’s revenue does not exceed €100,000. Both variants can be handled directly via ELSTER without a tax advisor.

Doing your own bookkeeping without a tax advisor: the monthly routine

The heart of any self-managed bookkeeping is a reliable monthly routine. Anyone who tidies everything up once a year makes life unnecessarily hard. A realistic monthly process can be split into a few clear steps.

Digitise and assign receipts right away

Every incoming invoice, every receipt and every bank statement should be recorded promptly: with category, tax rate and receipt date. The rule is simple: a receipt comes in, the receipt is digitised and assigned to the booking. Example: office supplies €119 gross, of which €19 input VAT, category “office supplies”. Doing this daily or weekly prevents a mountain of bookings at the end of the month.

Book income and expenses on a cash basis

In the EÜR, income only counts when payment is received, and expenses only when they are actually paid. An unpaid customer invoice is not yet business income. Bank statement and bookkeeping must be reconciled every month so that no transaction gets lost. Private contributions and private withdrawals must be booked cleanly and separately: they are neither business income nor business expenses.

Strictly separate private and business

A separate business account is not a legal obligation, but one of the most effective measures against booking errors. Running all business transactions through one account saves considerable time in the monthly routine. In a tax audit, a clean account history is also your strongest argument towards the tax office.

Preparing the EÜR yourself and filing it via ELSTER, without a tax advisor

At the end of the year comes the moment many self-employed people dread. Yet preparing the EÜR and filing it via ELSTER is no rocket science today.

How the EÜR works in practice

The EÜR follows a simple formula: business income minus business expenses equals profit. Income is totalled by category, for example fees, commissions and VAT collected. Expenses too: rent, office supplies, software costs, depreciation. The result is transferred to the official Anlage EÜR form and filed electronically together with the income tax return.

Step by step to filing via ELSTER without a tax advisor

Once you register with Mein ELSTER, you can file advance VAT returns and the annual return online directly and free of charge. You need a tax number (Steuernummer) and a valid ELSTER certificate; registration takes a few days because an activation code is sent by post. If you use accounting software with a direct ELSTER interface, you transfer the calculated figures to the tax office in a few clicks, without filling in forms by hand. Important: not every software handles the authenticated transmission automatically – before choosing, check whether the ELSTER connection is really fully integrated.

E-invoicing from 2025: what the self-employed need to know now

Since January 2025, all businesses must be able to receive and process e-invoices. Anyone who invoices other businesses has to switch to the new format step by step: from 2027 the obligation to issue e-invoices applies to businesses with more than €800,000 revenue in the previous year, from 2028 to all others. Small businesses under the Kleinunternehmerregelung are exempt from the obligation to issue e-invoices, but must already be able to receive them today. Simple PDF invoices will no longer be enough for B2B transactions.

These mistakes cost the self-employed time, money and nerves

It is not calculation errors but structural gaps in the bookkeeping that lead to back payments or tax audits. The most common problems are well known and easy to avoid.

Mistakes with receipts, VAT and archiving

Among the most frequent triggers of problems are unbooked cash payments or PayPal transactions and wrong tax rates on incoming invoices. Add to that missing mandatory details (Pflichtangaben) on your own invoices and chaotic cash book keeping with negative daily balances. Digital receipts that are only stored as an editable file do not meet the GoBD requirements. Mixing private and business accounts also risks the tax office not recognising expenses.

How to avoid these mistakes from the start

The most effective countermeasure is a monthly reconciliation routine: reconcile bank account, payment providers and bookkeeping, check unpaid invoices and review the VAT accounts. Always document corrections of wrong bookings with a reversal (Storno), never overwrite them silently. If you do this consistently, your bookkeeping will be traceable and complete in a tax audit.

With the right software, bookkeeping almost runs by itself

Doing your own bookkeeping without a tax advisor is much easier when the software structures the work and covers legal requirements automatically. Choosing the right solution is no minor matter.

What matters in accounting software for the self-employed

A good solution records receipts in a GoBD-compliant way, calculates the EÜR automatically from the booked transactions and files the advance VAT return directly via ELSTER. It supports e-invoices in the ZUGFeRD and XRechnung formats and allows a data export for the tax advisor in case you want support with the annual return. If you also want to work in another language, look for multilingual support.

Kontelio: bookkeeping for the self-employed without prior knowledge

Kontelio is a cloud-based accounting software developed specifically for the self-employed and small business owners in Germany. In simplified mode, the interface only shows what is really needed: creating invoices, booking expenses, uploading receipts and filing directly to the tax office with your ELSTER certificate (ELSTER filing is included from the Business plan). No hidden functions, and no overload for beginners.

If you have to issue or receive e-invoices, the built-in ZUGFeRD and XRechnung function gets you ready for the e-invoicing obligation. Kontelio is also available in nine languages, which makes the decisive difference especially for self-employed people who have moved to Germany. If you want to bring in a tax advisor, you give them a free tax-advisor access with its own role to your recorded data, from the Business plan. You can try Kontelio free for 30 days and take your bookkeeping into your own hands right away.

Conclusion: structure beats the tax advisor

Doing your own bookkeeping without a tax advisor is a realistic option for freelancers and many small business owners in Germany. The foundation is structure: a monthly routine, GoBD-compliant receipt management, on-time ELSTER filings and a clear separation of private and business transactions. Once you have set this up, you quickly notice that ongoing bookkeeping takes less time than expected – for many solo self-employed people it is only a few hours a month.

This does not make tax advisors superfluous. In complex situations such as business abroad, fixed assets or the annual tax return, professional support is worth the money. Anyone who starts and stays consistent finds out: the first step is easier than most people think, especially with the right software at your side.