This part of GOV.UK is being rebuilt – find out what beta means

HMRC internal manual

Tonnage Tax Manual

The 75% limit on charters-in: How to calculate

Accounting periods of group companies

Same accounting period

Where all qualifying tonnage tax companies have the same accounting period the calculation will be done in respect of each shared accounting period.

Differing accounting periods

The position is rather more complicated if the companies in a group have different accounting periods. In such a case the test must be satisfied in respect of each period that can be defined by the accounting period of a company in the group. See the examples below.


Example 1: Deferment of election if test failed TTM05220
Example 2: Possible exclusion for exceeding limit over 2-year period TTM05230