Based on a comparison of 27 banks in Bulgaria in 2017, Bulgarian Development Bank was the most cost efficient bank, followed by UniCredit Bulbank and Eurobank Bulgaria.

Bulgarian Development Bank's cost to income ratio reached 22.6% in 2017, down from 20.7% when compared to the last year. Historically, the bank’s costs reached an all time high of 44.9% in 2007 and an all time low of 12.6% in 2010.

When compared to total assets, bank's cost amounted to 1.39% in 2017, down from 0.664% a year earlier.