A Gesellschafterdarlehen is a loan from a shareholder to its own company — in our experience, how most international buyers fund a supermarket GmbH (Part 9). Its interest is deductible for the GmbH at an arm's-length rate and, paid to a lender abroad, stays free of German tax only if all four conditions hold; in an insolvency the loan ranks behind other creditors.
• A written agreement — amount, arm's-length rate, term, ranking, repayment — signed before any funds move.
• No security on the property for the shareholder, and no link between interest and profit.
• The lender's tax residence, and advice there on how the interest is taxed.
• For a group company lending from abroad, proof that the GmbH could service the loan over its full term (§ 1(3d) AStG).