The economy of Gibraltar is managed and controlled by the Government of Gibraltar. Whilst being part of the European Union, the British overseas territory of Gibraltar has a separate legal jurisdiction from the United Kingdom and enjoys a different tax system. Gibraltar has historically been an important base for the British Armed Forces and is the site of a Royal Navy base.
Gibraltar is a self-governing British overseas territory. The role of the UK Ministry of Defence, which at one time was Gibraltar’s main source of income, has declined, with today’s economy mainly based on shipping, tourism, financial services, and the Internet.
Gibraltar has an overall cost of living index which equates it with middle cost of living locations. The overall cost of living index is comprised of the prices for defined quantities of the same goods and services across all 13 Basket Groups.
The latest cost of living rank for each of the 13 Basket Groups is now available.
Expatriate International Cost of Living 
You can enjoy your life in Gibraltar by living over the border. The prices are a little bit less on the Spanish side.