Retroactive Effect (Register)

Retroactive Effect (Register) describes in German registry law the temporal effect of an entry in the commercial register or in the cooperative, partnership, or association register on already existing legal relationships. General rule: The entry unfolds its legal effect ex nunc, that is, from the moment of registration. Exceptions are particularly provided by conversion law: In the case of a merger according to § 2 UmwStG, tax consequences can be retroactively transferred to the beginning of the fiscal year, while the civil law merger only becomes effective upon registration. In the case of a change of form, retroactive effect is excluded; the new legal form status arises only with register entry, even if the shareholder resolution was made earlier. The limitation of liability of a limited partner is also partially discussed, but it is generally valid that the liability amount is only reduced after publication in the commercial register. Companies, founders, tax advisors, and notaries must therefore check whether a legally regulated retroactive fiction applies or whether contracts and liability remain unchanged until registration. Understanding the register's retroactive effect minimizes legal risks, optimizes tax planning opportunities, and prevents unpleasant surprises in conversion, founding, and capital measures.