How are Taxi fares calculated?

Taxi fares in Athens, are set by the Greek state. Here is how Taxi fares work:

FARE BREAKDOWN
Taxi fares are a sum of time, distance and any applicable surcharges that may be applicable. However, Taxis have tiered pricing depending on the time of day. Thus don't get surprised if you see a different fare on the same trip in the morning vs. late night hours. You can find more details on how tiered pricing works below.
Here's an analytical Taxi fare breakdown:
Minimum fare: €4
Base fare: €€1.80
Cost per km: €0.90 or €1.25 depending on the time of the trip.
Cost per minute: €0.19 This charge only applies for the duration that the Taxi vehicle was fully stopped (e.g. traffic lights, STOP signs, etc.).
Airport surcharge: €4
Luggage surcharge (heavier than 10kg): €0.39 each
Harbor or bus stops surcharge: €1.07

FLAT RATES - AIRPORT
Flat rates apply for trips taken from Athens (within the ring displayed in the link at the end of the article) to the Airport and vice versa. Flat rates are affected by tiered pricing and depend on the time of arrival to the final destination. Flat rates are either €40 or €55 and include all base charges and surcharges, plus tolls.
However, if there are any additional stops made throughout the trip or if the trip is outside the ring mentioned above, flat rates do not apply and the final fare will be calculated as described above.

TIERED PRICING
Taxis have tiered pricing depending on the time of day. This affects the cost per km and flat rates, while the rest of the charges remain the same. For trips between 05:00 and 23:59, the cost per km is €0.90, while for trips between 00:00 and 04:59 the cost per km is €1.25.
BEFORE COMPLETING YOUR TRIP
Please note that throughout the trip, the taximeter on the vehicle will be active and will be calculating your fare in real-time, minus the surcharges. At the end of the trip, the driver will stop the taximeter and will input the final fare with any surcharges that may apply, on the Uber app.