Practice areas
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Reorganisation Tax Law

In reorganisations, forward-looking tax planning is just as decisive as precise contract drafting. We advise on conversions, contributions in kind, mergers, real divisions and demergers and, working with tax law specialists, identify routes to tax advantages. With a clear legal and tax structure, we secure economic efficiency and avoid costly mistakes in transformation processes – we tell you frankly how we assess your matter and give you an estimate of the costs.

Restructuring without disclosing hidden reserves — that is what the Reorganisation Tax Act (Umgründungssteuergesetz) is for. We build the structure that fits.

The Reorganisation Tax Act (UmgrStG) gives businesses the opportunity to adapt their structure without the restructuring itself resulting in a tax burden. We advise from the planning stage through contract drafting to implementation — closely coordinated with your tax adviser, because the legal and the tax perspective are inseparable here.

The six reorganisation types

  • Article I – Merger (Verschmelzung): two or more companies are combined into a single entity. We draft the merger agreement, support the resolution and the Austrian companies register entry (Firmenbuch), and make sure that tax neutrality is preserved.
  • Article II – Conversion (Umwandlung): a change of legal form, or transfer of the assets to the main shareholder, typically from a company into a partnership or into a sole proprietorship.
  • Article III – Contribution in kind (Einbringung): a business, part of a business or a partnership interest is contributed to an existing or newly formed company in exchange for the grant of shares. The most common route into a GmbH structure.
  • Article IV – Combination (Zusammenschluss): assets are pooled in a partnership for joint continuation, in exchange for the grant of partnership rights.
  • Article V – Real division (Realteilung): the assets of a partnership are divided among the partners; the partnership rights are extinguished in the process. Typical when partners go their separate ways.
  • Article VI – Demerger (Spaltung): a company is divided into several companies — as a split-up or split-off, by absorption into an existing company or by formation of a new one. Suitable for separating business divisions or properties.

Why the effective date determines the timetable

Reorganisations take retroactive tax effect as of a chosen effective date. The registration with the companies register, or the notification to the tax office — mandatory for reorganisations in structured electronic form via FinanzOnline since mid-2025 — must be made within nine months of that effective date. If the deadline is missed, the retroactive effect is lost — and with it, in most cases, the entire tax benefit. Anyone considering a reorganisation with an effective date of 31 December should therefore set it up in good time in the autumn, because the valuation, the balance sheet and the resolutions all need lead time.

Typical occasions from practice

The move from a sole proprietorship to a GmbH as liability risk grows. The separation of the business from the property, to take assets out of the operating risk. The combination of sister companies for simplification. The division of a family business in the course of succession. The preparation of a sale in which a business line is split off. In all of these cases, the structure determines the tax burden — often for years to come.

Interplay with company and contract law

A reorganisation is never just a tax exercise: articles of association must be adapted, shareholder resolutions passed, companies register filings prepared, contracts with banks, suppliers and landlords reviewed for change-of-control clauses, and the employment-law consequences of a transfer of business considered. We think through these layers together — that is why we handle this area together with Corporate & Company Law.

Early planning pays off directly

The earlier the structure is settled, the more room for manoeuvre remains — on the effective date, the valuation and the contract drafting. Talk to us before the financial year ends.

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Frequently asked questions

What does a reorganisation under the UmgrStG achieve?

What does a reorganisation under the UmgrStG achieve?

The central advantage is the continuation of book values (Buchwertfortführung): assets are transferred at book value, so that hidden reserves are not disclosed and not immediately taxed. Without the Reorganisation Tax Act, every restructuring would be a taxable exchange. The precondition is that the relevant application requirements of the UmgrStG are met — if one of them is not met, the general tax rule applies.

What types of reorganisation are there?

What types of reorganisation are there?

The UmgrStG recognises six types: merger (Article I), conversion (II), contribution in kind (III), combination (IV), real division (V) and demerger (VI). Which type fits depends on whether companies or partnerships are involved, whether assets are to be combined or separated, and what consideration is envisaged.

What does the effective date mean for a reorganisation?

What does the effective date mean for a reorganisation?

Reorganisations take retroactive tax effect as of a freely chosen effective date. The registration or notification must be made within nine months of that effective date — if this deadline is missed, the retroactive effect is lost, and with it, as a rule, tax neutrality. This deadline is the most common stumbling block in practice and determines the entire timetable.

Do I need a balance sheet for a reorganisation?

Do I need a balance sheet for a reorganisation?

As a rule, yes: a closing balance sheet as of the effective date is required and, depending on the type of reorganisation, a reorganisation balance sheet. For contributions in kind, the positive market value of the contributed assets must also be evidenced. These documents are produced in cooperation with your tax adviser; we align the legal structure with them.

What happens to loss carry-forwards?

What happens to loss carry-forwards?

Loss carry-forwards can pass to the acquiring company under certain conditions; what matters is whether the loss-making business is still present in a comparable form at the time of the reorganisation. The so-called shell-company rule (Mantelkauftatbestand) can exclude the transfer where the shareholder structure, the business activity and the organisational structure change materially. This should be examined early in the planning.

How do I convert my sole proprietorship into a GmbH?

How do I convert my sole proprietorship into a GmbH?

The usual route is a contribution in kind under Article III UmgrStG: the business is contributed to an existing or newly formed GmbH on the basis of a contribution balance sheet, at book values and therefore without disclosing the hidden reserves. The requirements include, among others, a positive market value of the business and compliance with the nine-month deadline from the chosen effective date. In addition, the trade licence (Gewerbeberechtigung), ongoing contracts and employment relationships must be transferred to the GmbH. The most common occasion is growing liability risk — the most common mistake is an effective date chosen too late.

Last reviewed August 2026

This overview is general in nature and does not replace advice on an individual case. We research carefully; even so, errors cannot be ruled out and the law keeps changing. Binding information is given in a personal consultation.

Questions about reorganisation tax law?

Tell us about your case – we will give you a candid assessment and a clear picture of the cost.

+43 662 26033