inklusive
including
Used as a preposition to express that something is included or contained in a price or a whole.
Der Preis beträgt 50 Euro pro Person, inklusive Frühstück.
The price is 50 euros per person, including breakfast.

inclusive / including
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including
Used as a preposition to express that something is included or contained in a price or a whole.
Der Preis beträgt 50 Euro pro Person, inklusive Frühstück.
The price is 50 euros per person, including breakfast.

When 'inklusive' (including) is used as a preposition, the following noun takes the genitive in standard German. In colloquial speech, however, the dative is very common and is often felt to sound more natural.
Der Preis versteht sich inklusive des Zubehörs.
The price includes the accessories.
You can recognize the meaning from the grammar: If 'inklusive' (including) is used as a preposition before a noun, it means 'included'. If it is declined like an adjective, e.g. 'ein inklusives Team' (an inclusive team), it is about social inclusion.
Die Reise kostet 500 Euro inklusive Flug.
The trip costs 500 euros including the flight.
As a preposition, 'inklusive' (including) can come before or after the noun it refers to. Placing it after the noun is especially common in price information.
Das Menü kostet 25 Euro inklusive einem Getränk.
The menu costs 25 euros including a drink.
In the meaning of 'socially inclusive', 'inklusiv' (inclusive) is often used in social and educational contexts. Typical combinations are 'inklusive Gesellschaft' (inclusive society), 'inklusiver Arbeitsplatz' (inclusive workplace), or 'inklusives Lernen' (inclusive learning).
Das Ziel ist eine inklusive Gesellschaft, in der alle teilhaben können.
The goal is an inclusive society in which everyone can participate.
with
'mit' and 'inklusive' can both express that something belongs with something else or is included. 'mit' is very common in everyday language and fits many situations: 'ein Zimmer mit Bad' (a room with a bathroom), 'ein Kaffee mit Milch' (a coffee with milk). 'inklusive' sounds more precise and often a bit more official, especially with prices, offers, or lists. In that case, it means: this is already included and does not cost extra. Learners may confuse the words because 'mit Frühstück' (with breakfast) and 'inklusive Frühstück' (including breakfast) mean almost the same thing. In normal conversations, 'mit' often sounds more natural; for bookings or prices, 'inklusive' is especially clear.

Das Hotelzimmer kostet 90 Euro inklusive Frühstück.
The hotel room costs 90 euros including breakfast.
Ich nehme einen Tee mit Zitrone.
I'll have a tea with lemon.