der Tarif
rate / tariff
A fixed price list or schedule of fees for a particular service or product.
Ich suche einen günstigeren Tarif für mein Mobiltelefon.
I'm looking for a cheaper rate for my mobile phone.

rate / tariff
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rate / tariff
A fixed price list or schedule of fees for a particular service or product.
Ich suche einen günstigeren Tarif für mein Mobiltelefon.
I'm looking for a cheaper rate for my mobile phone.

You can easily recognize the meaning of 'Tarif' from context. If people are talking about services such as phone plans, electricity, or transportation, it means a price list or rate. If it is about work, wages, and unions, it means a wage agreement.
Mein Handyanbieter hat mir einen neuen Tarif angeboten.
My mobile provider offered me a new rate.
As a price list for services, 'Tarif' often appears in compounds. Common ones are 'Handytarif' (mobile phone plan), 'Stromtarif' (electricity tariff), 'Gastarif' (gas tariff), or 'Bahntarif' (rail fare). You can also 'den Tarif wechseln' (switch rates/plans).
Ich sollte meinen Stromtarif vergleichen, um Geld zu sparen.
I should compare my electricity tariff to save money.
As a wage agreement, 'Tarif' is often part of fixed expressions such as 'nach Tarif bezahlt werden' (to be paid according to the collective agreement) or 'Tarifverhandlungen' (collective bargaining negotiations). It is the short form of 'Tarifvertrag' (collective agreement).
In diesem Unternehmen werden alle Mitarbeiter nach Tarif bezahlt.
In this company, all employees are paid according to the collective agreement.
price / prize
'der Preis' and 'der Tarif' both have to do with money that you have to pay. 'der Preis' means the specific amount for a single product or service. 'der Tarif' is more like a fixed rule or list of prices, for example for a mobile phone, electricity, trains, or insurance. They can be confused because a tariff or rate also includes prices. If you just want to know how much something costs, 'Preis' usually fits. If it is about a plan or offer with fixed conditions, 'Tarif' fits better.

David wählte einen neuen Tarif mit mehr Datenvolumen.
David chose a new plan with more data.
Vor der Reise vergleicht sie den Preis für das Zugticket.
Before the trip, she compares the price of the train ticket.