1Sofia
Source: Link
Sofia is the most expensive city to live in Bulgaria. An average cost of living for a single person in Sofia without rent is 6,476.05 R. This city has a cost of living index of 41.01. The monthly cost of accommodation for a one bedroom apartment is 657.32 Nb inside the main city, cost of accommodation for a one bedroom apartment outside the main city is 490.54 nB.