Corporations
Continuation-bound loss carryforward

Everything you need to know about the continuation-bound loss carryforward (fortführungsgebundener Verlustvortrag) under § 8d KStG.

Marius Siemen
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Attorney at law, Partner
Updated on 
23/07/2026
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4
 Min. reading time

The key points in brief

  • When a corporation (Kapitalgesellschaft) is purchased, § 8c KStG prevents loss carryforwards (Verlustvorträge) from being "sold along with it"; where more than 50% of the shares are transferred, the losses of the corporation sold are forfeited in full.
  • The legislator wanted to create an exception: § 8d KStG makes available what is known as a "continuation-bound loss carryforward" (fortführungsgebundener Verlustvortrag): the losses are preserved if the specific business operation (Geschäftsbetrieb) is continued unchanged.
  • However, this is tied to strict requirements relating to what is termed a single, uniform business operation (einheitlicher Geschäftsbetrieb) and to the prohibition of certain "harmful events" (schädliche Ereignisse) (e.g. dormancy, an additional business operation, a tax group (Organschaft)).

What is a continuation-bound loss carryforward (fortführungsgebundener Verlustvortrag) – and what purpose does § 8d KStG pursue?

The continuation-bound loss carryforward is an instrument that allows the losses of a corporation (Kapitalgesellschaft) to be used for tax purposes despite a change of shareholders (Anteilseignerwechsel).

The starting point is § 8c KStG. This provision was introduced in order to prevent abusive purchases of shell companies (Mantelkäufe) – cases in which empty corporations with substantial loss carryforwards are bought solely in order to offset those losses against profits. The purpose of the provision is to reflect the ability to pay tax correctly: losses should benefit only the business that economically incurred them and that continues to operate the corresponding business.

In practice, however, it became apparent that § 8c KStG captured not only abusive arrangements but also hit legitimate financing and restructuring cases hard – for instance where investors take a stake in a loss-making start-up or where a group takes over a loss-making mid-sized company. The legislator sought to correct these "overshooting" effects.

§ 8d KStG pursues precisely this purpose: upon application, the provision permits losses to continue to be used despite a harmful acquisition of shares (schädlicher Beteiligungserwerb), provided that the corporation continues its existing business operation unchanged.

How does § 8d KStG relate to § 8c KStG – and how does the underlying system work?

§ 8d KStG is a targeted corrective to the loss restriction under § 8c KStG for cases in which the business operation is continued; it applies as a supplement and only upon application.

§ 8c KStG governs the deduction of losses by corporate bodies (Körperschaften). If more than 25% of the shares are transferred within five years to one acquirer or to a group of acquirers with aligned interests, loss carryforwards are no longer deductible to the corresponding extent; if more than 50% of the shares are transferred, the unused losses are forfeited in full. A capital increase is treated in the same way as a transfer of shares to the extent that the shareholding ratios change. The purpose of this mechanism is to prevent trading in loss-making shell companies and to ensure that losses are not transferred to new activities in the absence of economic continuity.

Because § 8c KStG burdens many borderline cases, the legislator supplemented the provision with exceptions such as the group clause (Konzernklausel) and the hidden-reserves clause (Stille-Reserven-Klausel), in order to relieve typical restructuring and group reorganisation scenarios. Nevertheless, constellations remained in which the forfeiture of losses on a change of shareholders was not economically justified, in particular in the case of young growth companies and innovative business models.

§ 8d KStG takes this as its starting point: upon application, the provision allows § 8c KStG to be "switched off" for certain losses where a single, uniform business operation is continued over a defined period and no harmful events occur. The system is as follows:

  • First, it is examined whether a harmful acquisition of shares within the meaning of § 8c KStG exists (50% threshold, five-year period, one acquirer or a group of acquirers with aligned interests).
  • If losses are thereby threatened, the exceptions within § 8c KStG (restructuring clause, hidden reserves, group clause) must be examined.
  • If a forfeiture of losses remains, an application under § 8d KStG may be made: the remaining loss becomes a continuation-bound loss carryforward if the relevant business operation was conducted unchanged in the tax periods that are relevant before and after the acquisition of shares.

The purpose of this interlocking arrangement is to combine two objectives: to prevent abusive purchases of shell companies and, at the same time, to enable legitimate investment and restructuring within the existing business operation.

What requirements must specifically be met for the continuation-bound loss carryforward?

The continuation-bound loss carryforward is tied to narrowly defined requirements intended to ensure that losses remain only with businesses that are economically identical.

  • Harmful acquisition of shares within the meaning of § 8c KStG: § 8d KStG presupposes that a harmful acquisition of shares exists in the first place – that is, a transfer of shares that would lead to a complete forfeiture of losses under § 8c KStG. The provision is therefore confined to cases in which the forfeiture of losses has already been triggered.
  • A single, uniform business operation over at least three assessment periods (Veranlagungszeiträume): the corporate body must, since its formation or at least since the beginning of the third preceding assessment period, have maintained exclusively the same business operation. The business operation is determined qualitatively: it comprises the interrelated activities directed at a single intention to generate profit, and is delimited by reference to products and services, the customer and supplier base, the markets served and the workforce structure.
  • No harmful events during the relevant period: § 8d Abs. 2 KStG lists events that preclude the application of the provision or subsequently lead to the forfeiture of the continuation-bound loss, because they indicate a fundamental change in the business operation. These include, in particular, the cessation or dormancy of the business operation, the taking up of an additional business operation, participation in a co-entrepreneurship (Mitunternehmerschaft), the establishment of a tax group as the controlling company (Organträger), and the transfer of assets below fair market value (gemeiner Wert). The aim is to grant relief only in cases in which the existing business remains essentially the same and is not intermingled with other activities.
  • Application and separate assessment by the tax office: the continuation-bound loss carryforward arises only upon application by the corporate body, which must be made together with the tax return for the assessment period in which the harmful acquisition of shares occurs. The tax office (Finanzamt) then assesses the remaining loss separately as a continuation-bound loss. The application compels the business to decide consciously in favour of tying the losses to the business operation and to comply with the corresponding documentation obligations.

In advisory practice, these requirements mean that, before a change of shareholdings, the history of the business – business model, divisional structure, shareholdings, tax groups and transfers of assets – must be analysed thoroughly. More recent decisions, for example on tax groups and co-entrepreneurships, show that even apparently minor changes to the corporate structure can preclude the application of § 8d KStG.

What legal consequences does the continuation-bound loss carryforward have – pro rata or complete use of losses?

The continuation-bound loss carryforward prevents the forfeiture of losses under § 8c KStG and enables the assessed loss to be used in full for as long as the business operation is continued unchanged; if a harmful event subsequently occurs, the continuation-bound loss carryforward is forfeited in full.

Where more than 50% of the shares are transferred, the entire remaining loss is forfeited.

§ 8d KStG takes effect at this point and protects the loss in full where the requirements are met. The loss remaining at the end of the assessment period is assessed separately as a continuation-bound loss carryforward and is offset in subsequent years, on a priority basis, against profits from the same business operation. A threatened pro rata or complete forfeiture of losses thus becomes a plannable, complete offsetting of losses over time.

The price of this protection is the strict tie to the business operation: as soon as the business is ceased, rendered dormant or qualitatively altered by the taking up of an additional business operation, the continuation-bound loss is forfeited in full. § 8d KStG operates on an "all or nothing" principle. For as long as the business remains identical, complete use is possible; where there is a structural break, the loss is lost entirely.

For practical purposes, this means:

  • The complete forfeiture of losses where more than 50% of the shares are transferred is neutralised by § 8d KStG, for as long as no harmful events occur.
  • Strategic changes – such as a change of business model, the building up of new, independent business divisions, or the establishment of a tax group or a co-entrepreneurship – can destroy the continuation-bound loss immediately and make advance tax structuring absolutely essential.

Frequently Asked Questions

How do I proceed in practice if I want to use a continuation-bound loss carryforward (fortführungsgebundener Verlustvortrag)?
First, you should examine whether a planned or already completed change of shares would lead to a complete forfeiture of losses under § 8c KStG – this requires a detailed analysis of shareholding ratios, periods and groups of acquirers. In a second step, the business operation (Geschäftsbetrieb) of the last three assessment periods (Veranlagungszeiträume) should be documented: products and services, the customer and supplier structure, markets and internal organisation must be described in such a way that the uniformity of the business becomes verifiable. On this basis, the application under § 8d KStG is made in the assessment period of the harmful acquisition of shares (schädlicher Beteiligungserwerb) and the remaining loss is assessed separately as a continuation-bound loss carryforward – accompanied by ongoing monitoring of whether planned structural measures (e.g. new business divisions, a tax group (Organschaft), co-entrepreneurships (Mitunternehmerschaften)) would qualify as harmful events.
When does an application under § 8d KStG make sense?
An application is particularly worthwhile where a corporation (Kapitalgesellschaft) has substantial loss carryforwards, a change of shares within the meaning of § 8c KStG is imminent and, at the same time, the existing business operation (Geschäftsbetrieb) is to be continued unchanged – typically in the case of growth companies with an incoming VC investor or in restructurings within the existing business model. If, on the other hand, a change of business model, the building up of new, independent business divisions or the establishment of a tax group (Organschaft) is planned, § 8d KStG often offers only short-term advantages, because the continuation-bound loss would subsequently be forfeited as a result of harmful events.
How does the continuation-bound loss carryforward differ from the hidden-reserves clause (Stille-Reserven-Klausel) in § 8c KStG?
The hidden-reserves clause (Stille-Reserven-Klausel) in § 8c KStG permits losses to continue to be used, despite a transfer of shares, to the extent that they are covered by existing hidden reserves; the focus lies on the balance sheet structure and the value of the assets. The continuation-bound loss carryforward under § 8d KStG, by contrast, is linked to the continuation of the business operation (Geschäftsbetrieb) and presupposes that this remains qualitatively the same and that no harmful events occur. Both instruments pursue the same purpose – enabling economically justified use of losses – but do so by means of different criteria: hidden reserves on the balance sheet versus the identity of the business.
Can a continuation-bound loss carryforward later be "converted" back into an ordinary loss carryforward?
No. Once assessed, a continuation-bound loss carryforward remains tied to the requirements of § 8d KStG and must be used in priority to the general loss carryforward under § 10d EStG. If a harmful event occurs, this loss item is forfeited in full; a return to the general pool of losses or a partial rescue is not provided for by law and would run counter to the purpose of preserving losses only where the business operation (Geschäftsbetrieb) remains unchanged.
Which typical structuring errors lead to the loss of the continuation-bound loss carryforward?
In practice, it is above all unplanned structural changes that lead to the forfeiture of the continuation-bound loss: the taking up of an additional, independent business operation (Geschäftsbetrieb), the establishment of a tax group (Organschaft) as the controlling company, entry into a co-entrepreneurship (Mitunternehmerschaft) or the transfer of material assets to the corporation below fair market value (gemeiner Wert) are frequently treated by the tax authorities and the courts as harmful events. Anyone wishing to make use of § 8d KStG should therefore examine, before every major restructuring step, whether it changes the character of the business operation – and, where appropriate, choose alternative routes in order to preserve the continuation-bound loss carryforward.