Audited

14. Other operating expenses

Other operating expenses
in € thousand	2019	2018
Consultancy, services, insurance and auditing expenses	48,071	39,789
External maintenance services	43,360	41,755
Leasing costs	9,472	58,295
Travel expenses, advertising and promotional costs	4,840	4,375
Other personnel expenses	3,479	4,239
Expenses from other accounting periods	3,300	2,125
Other taxes	2,924	3,125
External and internal cleaning costs	2,551	2,230
Postage and telecommunications costs	1,604	1,568
Other venture expenses	984	2,608
Impairment losses on financial assets	907	998
Expenses from exchange rate differences	520	912
Losses on the disposal of property, plant and equipment	144	134
Other	12,419	9,919
	134,575	172,072

Expenses for consultancy, services, insurance and auditing increased, mainly due to an increased need for project-related consultancy.

The introduction of IFRS 16 led to a reduction in leasing expenses. Detailed information is available in Note 45.

The HHLA Group regards the impairment losses on financial assets listed above as immaterial and has therefore decided not to show them separately in the income statement.

Other operating expenses also include numerous smaller individual items.

IFRS

International financial reporting standards.

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