For 95% of medium-sized enterprises, the GmbH is the right legal form. For 5%, switching to an AG is worthwhile — but it is precisely these 5% that often provide the most strategically interesting mandates. When does the switch make sense?
The fundamental difference
GmbH and AG are both corporations and are treated identically for tax purposes (corporate tax, trade tax). The difference lies in the governance structure and in the capital market access:
- GmbH: Shareholders' meeting + managing director. Streamlined, flexible, largely customizable in the articles of association.
- AG: General meeting + supervisory board + executive board. Three-tier structure with clearly separated responsibilities. Shares are called stocks and are generally freely transferable.
When the AG is truly worthwhile
1. Planned access to the capital market
Anyone planning an IPO (even in the open market or in the scale segment) cannot avoid the AG. The AG is also the customary format for private placements with institutional investors.
2. Broad participation structure
With more than 10–15 shareholders, the GmbH becomes unwieldy. Each transfer of shares requires notarization. Stocks are transferable without notarization — a significant advantage for employee participation programs or investor pools.
3. Reputation signal
For family offices, large investors, and international corporations, the AG is a familiar format. At the negotiating table, the legal form alone makes a difference — even if the substance is the same.
4. Separation of ownership and management
The AG formally enforces a separation: shareholders (stockholders) decide on the supervisory board, the supervisory board on the executive board, and the executive board on day-to-day business. For structures that want or need this separation (family succession, foundations, private equity participation), the AG is the natural framework.
An AG costs significantly more to operate than a GmbH: supervisory board remuneration, annual general meeting, higher auditing and publicity obligations. For companies with revenues of around €10 million, this effort is rarely worthwhile.
The transition from GmbH to AG
The change of form according to §§ 190 ff. UmwG is tax-neutral possible. Requirements:
- Minimum capital of €50,000 (for GmbH €25,000) must be reached
- Notarization of the transformation resolution
- Appoint a supervisory board (at least 3 members)
- Examination of the value relationships
Typical duration: 3–4 months from resolution to registration. Costs for notarization and examination: starting from approx. €15,000 for medium-sized companies.
The hybrid form: GmbH under AG (or vice versa)
In practice, we often see: family AG as the parent holding operational GmbHs. Advantage: the AG structure for the asset sphere (with a supervisory board as the monitoring body), GmbH flexibility for operational matters. This model combines capital market options with operational speed.
Conclusion
The GmbH remains the standard tool for 95% of all mandates — even with six- and seven-figure annual profits. The AG becomes relevant from the following thresholds: planned exit via capital market, employee participation > 10 persons, investor pool with several family offices, separation of ownership and management.
For all others: GmbH plus clean holding structure meets 95% of the requirements — at a fraction of the ongoing costs of an AG.
Which legal form fits?
We analyze your growth plans, investor structure, and exit options — and recommend the legal form that will still be viable in 3–5 years.
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