A conversion from a sole proprietorship to a GmbH can achieve several advantages. On the one hand, liability can be shifted from the private level to the company assets and thus significantly limited. Furthermore, profits of a GmbH can be taxed more advantageously on account of the more favorable tax rates. The tax savings thus enable higher reinvestments in your own company. Therefore, in this article we show how to achieve the conversion from a sole proprietorship to a GmbH in 2026.

1. Conversion of individual companies into GmbH – Introduction

Anyone who has selected this article for reading is likely to be a sole proprietor. Moreover, he or she is interested in a conversion from a sole proprietorship into a GmbH, because the GmbH represents the better tax structure in the respective situation. Then it says at this point: Congratulations on the successful company!

But how exactly do you have to imagine such a transformation in detail, especially one with retroactive effects, and what would it look like in 2026? We shall now reply to that.

2. Tax neutral conversion sole proprietorship in GmbH

First of all, we deal with a particularly important aspect of the conversion from a sole proprietorship to a GmbH, namely whether the process can be tax-neutral. And the short answer is, yes, that's possible. However – You probably already suspect it – some conditions must be met for this. § 20 paragraph 2 sentence 2 UmwStG. The most important requirement is to carry out the conversion to book values. This means that there are no differences in assets and liabilities between the previous balance sheet of the individual company and the initial balance sheet of the GmbH. Otherwise, this could mean that the conversion reveals hidden reserves. Of course, such a process is subject to taxation in Germany, otherwise every entrepreneur would make a conversion every few years to save taxes.

3. Benefits of retroactive effect on 01.01.2026

Now we have pointed out that the conversion can even take place retroactively. You are certainly wondering how this should work and what advantage this could have.

Retroactive conversion into a GmbH means that the sole proprietorship is continued for up to eight months and yet the tax office treats the taxation as if it had already been a GmbH during this period. If your sole proprietorship has a calendar-same financial year, the conversion can be carried out retroactively at the turn of the year.

This provides the following advantage: Since you have to submit a conversion balance sheet at the conversion date, you can save the extra costs of preparing such a special balance sheet when converting from a sole proprietorship to a GmbH, because you can also use the annual balance sheet for this purpose. Of course, this only works if the conversion can be carried out retroactively, because the preparation of the balance sheet at the end of the year requires time.

The next advantage is that the retroactive conversion also allows a refund of the income tax advance payments. Because after the conversion, one has to acknowledge on the basis of the retroactive effect that in the past maximum eight months no sole proprietorship for which these advance payments would be justified, but a GmbH. And with a GmbH, the applicable tax rate of about 30% is usually significantly cheaper than with the income tax advance payment. This is one of the main reasons why you should convert a sole proprietorship into a GmbH at all.

4. 3 Options for conversion from a sole proprietorship to a GmbH

We have talked about the tax neutrality of the conversion process and the possibility of retroactive effect. Now let's move on to the process itself. Here, there are three methods for carrying out the conversion.

The first way seems the least advantageous, even if it is the direct way: We simply convert the individual company. However, as already mentioned, a special balance sheet is actually necessary here, which confirms that the company value corresponds at least to the amount of the minimum share capital of a GmbH. This is an absolute requirement. If the fulfillment is shown in the annual balance sheet, however, this is equally meaningful. But there is another factor here. Because by the immediate conversion of the sole proprietorship into a GmbH, the former ceases to exist at the conversion date and the GmbH takes its place. Only the GmbH does not have a tax number at this time. She must first apply to the tax office. Until the GmbH receives a new tax number, weeks or even months can pass. During this time, it is impossible for them to create new invoices due to the lack of a tax number. Consequently, there may be a bottleneck in the liquidity inflow.

The second variant can at least eliminate the problem of ensuring the stability of value. In order to elegantly solve this condition, when converting the sole proprietorship into a GmbH, the minimum share capital of the GmbH is deposited in cash and the sole proprietorship is then entered practically only as an additional value into the resulting GmbH (this is called Sachagio). But the application for the new tax number is just as delicate in its effects as in the previous procedure.

In our opinion, the most elegant solution is to found a GmbH before the conversion. Immediately after the foundation, the GmbH applies for a tax number. Once the tax office has granted it, the conversion can be carried out. Then you bring the individual company into the GmbH.

5. Conversion of individual companies into GmbH: Roadmap 2026

If you have read everything carefully and thought through it, it is hardly surprising if you now also decide to convert your individual company into a GmbH. But how exactly does this process work in our office?

Well, the first step is basically already known. They commission the preparation of the annual accounts for 2025. It contains the balance sheet which is so important for the conversion. This work is either done by their tax consultancy firm, which has been responsible for this matter until now, or they hire us to do so. Time is needed for this. We generously expect three months. If the order takes place in January 2026, the balance sheet will be available in March.

Now we carry out the examination of all requirements for tax-neutral conversion and create the accompanying documentation. Let us allow one month for this and grant it another two months of buffer, then it is clear at the end of June at the latest whether the conversion can be tax-neutral. Then you can draw up the contracts required for the conversion from a sole proprietorship to a GmbH, which takes about a month. In the meantime, ideally, the new GmbH has also been founded and the tax number received. Now, at the end of July, everything is ready for the final notary appointment in August.

6. Conversion from a sole proprietorship into a GmbH – Conclusion

A conversion from a sole proprietorship to a GmbH is both feasible and often useful. Three options can be distinguished, of which we usually recommend only one, because it can be implemented without delays in terms of company management.

If you have finally formed a GmbH from the sole proprietorship, you can already benefit from the advantages of taxation according to the separation principle in 2026. In practice, this means that you can leave the share of the company profit that you want to do without on a private level in the GmbH tax-optimized. It is then available for further growth because you now have more money available for investment than if you reinvested the profit taxed more at private level.