The news came as the group announced an improved third quarter performance.
Underlying ebita (earnings before interest, taxes and amortization) rose by 18% to €194 million in the three months to the end of June.
The 30 British victims of the shooting on the beach near Sousse were all Tui customers.
The company launched a massive airlift operation to bring home customers still in Tunisia and subsequently cancelled all holidays to the country.
Tui’s rival Thomas Cook also took a hit from the terrorist attack in Tunisia and the financial crisis in Greece.
The 174-year–old tour operator said profits would be down by about £25 million because of the incidents.
The new enlarged Tui Group was created at the end of 2014 when Tui Travel merged with German parent company Tui AG.
Tui reveals cost of Tunisia attack
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