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Fifth rule (Fünftelregelung) — what does spreading actually save?

The fifth rule taxes one fifth of the extraordinary income and multiplies the extra tax by five: the saving comes solely from the curvature of the tariff, and is exactly zero in the proportional band.

2026 rules — verified on September 21, 2026Free, no account

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Sources and assumptions

Calculation assumptions

  • Excludes the reduced rate of § 34 (3) of the Income Tax Act (56 per cent of the average rate, at least 14 per cent, capped at 5 million euros), which requires the taxpayer to be 55 and may be claimed only once in a lifetime.
  • Excludes income subject to the progression proviso of § 32b, which changes the average rate.
  • Excludes the solidarity surcharge and church tax, which are separate levies assessed on this result.

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This result is provided for information purposes only and does not constitute personalised tax advice. Check your situation with the tax authorities or a professional.