§ 8b KStG: 95% tax-free —
the mechanics in detail.

§ 8b of the Corporation Tax Act is the most important norm in German holding tax law. Those who understand it grasp why holdings are such effective tax instruments. Those who apply it incorrectly risk a back payment that makes the holding model unprofitable for years.

What the norm essentially states

§ 8b KStG regulates two areas: (1) dividends received by a corporation from another corporation, and (2) profits from the sale of shares in corporations. Both are generally considered tax-free. However — and here lies the important twist — a flat rate of 5% is treated as "non-deductible operating expenses" and thus taxed.

The result: 95% of participation income remains effectively tax-free. With a total tax burden of 30% at the corporate and trade tax level, this results in an effective tax rate of 1.5% on dividends and capital gains.

The requirements for tax exemption

For dividends (§ 8b Abs. 1 KStG)

• 10% minimum participation at the beginning of the calendar year (so-called free float limit). Holdings below 10% are fully taxable.
• Corporation as distributing and as recipient (GmbH, AG, UG).
• No special anti-abuse rules violated (e.g., hybrid vehicles, treaty shopping).

For capital gains (§ 8b Abs. 2 KStG)

• Sale of shares in a corporation.
• No 10% minimum participation threshold (important: this does not apply to capital gains).
• Correspondingly: capital losses are also not tax-deductible.

The main pitfalls

Minority shareholding below 10%

If a holding GmbH holds shares below 10% in another corporation, it completely loses the § 8b exemption for dividends. Therefore, it must be examined whether the 10% threshold is consistently maintained for actively managed investment portfolios in the holding.

Losses are not deductible

If you sell an investment at a loss, that loss is not tax-deductible. In the event of a subsidiary's insolvency, the book value write-off is therefore not a tax-effective expense. This is the downside of the 95% exemption — it works symmetrically.

International investments

For investments in EU corporations, the Parent-Subsidiary Directive applies and reduces withholding tax to 0% (from 10% shareholding). For investments in third countries, the double taxation agreement situation must be analyzed — depending on the country, withholding tax rates of 5–15% are typical.

Controlled foreign corporation taxation according to AStG

For subsidiaries in low-tax countries (effective tax < 15%), § 7–13 AStG may apply: then the income is subject to German taxation regardless of the § 8b exemption. Substance and active business operations of the subsidiary are the decisive factors here.

Practical tips for holding structures

• Consolidate holdings in the holding, do not scatter — this secures the 10% threshold and simplifies the tax declaration.
• Keep book value low: When establishing a holding by contributing shares, the book value should not be set unnecessarily high — the lower the book value, the higher the later tax-exempt capital gain.
• Observe blocking period: When contributing in exchange for new shares, a blocking period of 7 years applies according to § 22 UmwStG. During this time, a sale will lead to retroactive taxation.
• Document substance: To apply § 8b in an international context, you must be able to demonstrate the economic substance of the holding — business premises, management, independent decisions.