The short answer
When equity is used up, there are two established ways to clear a balance-sheet over-indebtedness without paying in fresh money. A qualified subordination (qualifizierter Rangrücktritt) takes an existing claim out of the over-indebtedness test. A hard comfort letter (harte Patronatserklärung) gives the company an enforceable claim to be funded.
Both work only if they are drafted correctly. And neither replaces the going-concern forecast — they are building blocks inside it.
A note for readers outside Germany
This is the point where foreign shareholders most often get German subsidiaries wrong, and the reason is a translation problem.
In English practice a “letter of comfort” is usually deliberately non-binding — that is the whole point of calling it comfort rather than guarantee, and most group templates are written that way on purpose. German law distinguishes hard from soft comfort letters, and only the hard version counts for anything in the over-indebtedness test. A parent that sends its standard letter has, in German terms, sent a soft one: reassuring, and worth nothing to the managing director who has to decide whether to file.
The same applies to intra-group loans. Shareholder debt is ordinary debt in the German over-indebtedness test until it is formally subordinated. “We would never call it” is not a subordination.
The qualified subordination
A shareholder loan is a liability like any other and counts in full in the over-indebtedness test. If the shareholder declares a qualified subordination, the claim ranks behind all other creditors — with the effect that it is no longer counted in that test. The balance sheet does not change; the loan stays where it is.
Two points decide whether it works. First, reach: the subordination must rank behind all subordinated creditors within the meaning of the Insolvency Code, or it does not hold as a matter of insolvency law. Second, the payment restriction: it must be agreed that the claim is served only to the extent it can be paid out of free assets not required to cover debt.
That same wording drives the tax outcome. If repayment is tied exclusively to future profits or a liquidation surplus, the liability can be released to income — turning a restructuring contribution into a taxable gain. “Out of free assets” is not boilerplate; it is the substance of the agreement. The wording belongs in front of German counsel and a tax adviser in every individual case.
The comfort letter
In a comfort letter a parent or shareholder undertakes to fund the subsidiary. Two distinctions matter:
- Hard or soft. Only the hard version creates an enforceable claim to funding. A soft letter — “we will use our best efforts”, without legal obligation — is worth nothing against the over-indebtedness test.
- Internal or external. For the going-concern forecast what counts is the internal letter, addressed to the company itself, because that is what gives the company its own claim.
A letter becomes usable only with three specifics: amount, period and conditions. An open-ended, unquantified undertaking carries weight neither in the assessment nor in a bank meeting. And it is worth only as much as the credit standing of whoever signs it — which is why evidence of the parent's capacity is regularly requested.
Which instrument when
The subordination fits where money is already in the company, typically as shareholder loans from earlier rounds. It costs nothing beyond the agreement and takes effect immediately.
The comfort letter fits where future need has to be covered but the cash is not to move yet. It is the instrument of group and portfolio structures.
In practice both together are the normal case: existing loans are subordinated, future need is covered by a comfort letter with a stated amount and a stated end date. Where that is still not enough, a capital increase remains — effective, but slower and more expensive.
The mistakes
- Using a template unreviewed. The most common and most expensive error: wording that holds under insolvency law but triggers a taxable gain, or the other way round.
- Declaring too late. The declaration has to exist before the over-indebtedness statement is drawn up, not afterwards.
- Mistaking a soft letter for a hard one. Anyone relying on it has, in case of doubt, no claim at all.
- Open-ended and unquantified. Not usable by auditors, banks or advisers.
- Not documented. Verbal assurances between shareholders are no basis when it matters.
Common questions
Does a subordination improve equity?
No. The liability stays on the balance sheet; the effect arises solely in the over-indebtedness test. So where a credit agreement measures an equity ratio, it has to say separately whether subordinated shareholder loans count.
Can a subordination be withdrawn?
Only under narrow conditions, and with the same risks around wording and timing. A subordination that can be revoked at will does not hold in the first place.
Will a bank accept a comfort letter?
Banks often do, but ask for evidence of the signatory's credit standing and usually for a fixed term and a stated amount. A letter without those is normally not given credit.
What about a debt waiver?
A waiver removes the liability entirely, but it is final and generally has tax consequences. The subordination is the milder instrument — in many cases with the same effect on the over-indebtedness question.
Our group already issues comfort letters. Is that enough?
Usually not. Standard group letters are drafted to be non-binding, which makes them soft letters in German terms. For the over-indebtedness test the letter has to be internal, hard, quantified and time-limited — that is a different document, not a reworded one.
Which of the two do we need?
If shareholder loans are already in the company, start with the subordination — it is immediate and costs nothing. If the gap is in future funding, you need the comfort letter. Most situations need both.
Read on
- The going-concern forecast – where these instruments are used.
- Insolvency filing deadlines in Germany – the clock these documents stop.
- Finance in a restructuring – the first six weeks.
- Converting from HGB to IFRS – what changes, and what stays, in a German entity's accounts.
- Finance as a Service – the ongoing finance function the planning and the evidence come from.
- Finance for private equity portfolio companies – scope and ways of working.
Sources and status
Legal references are to the provisions of the German Insolvency Code on over-indebtedness and on the subordination of shareholder claims, and to the tax treatment of liabilities subject to a repayment restriction. As of September 2026. This article is an overview and expressly does not replace legal or tax advice. The wording of a subordination or a comfort letter belongs in front of German counsel and a tax adviser in each individual case.
