Sub-national authorities have extended competences in functions such as environment, life quality, social protection, education, culture and sports, agriculture, breeding and fishery development, and so on (as set by Law 3852/2010).

Sub-national governments' share of responsibility has increased following the implementation of the Kallikratis Law, as they have also accepted exclusive duties. However, the share of expenditures at the local level is relatively low by EU standards at 6% of total government expenditure in 2017.

The revenues for the municipal KAPs are:

• 21.3% of total annual receipts of income tax of physical persons and legal entities;
• 12% of total annual VAT revenues; and
• 50% of total annual receipts of the regular property tax (note that  as of 1 January 2014, this changed to 11.3% of total annual receipts of the Single Property Ownership Tax).

Two-thirds of the first category revenues and the whole of the other two categories' revenues make up the account covering operational and other general expenditures of the municipalities. The remaining third of the first category revenues covers investment expenditures.  KAPs covers 46%-49% of the total revenues of municipalities, although according to the Medium Term Fiscal Strategy 2013-2016, this share is intended to be reduced.

Article 261 of Law 3852/2010 set out measures for fiscal decentralisation when it comes to taxation. These measures focus on three points:

• A percentage of the annual increase of VAT receipts within the administrative territory of a municipality may be assigned to the municipality concerned, and it will be used exclusively for social solidarity services.
• By means of a ministerial decision, 20% of property tax revenues may be considered as local municipal revenue depending on the total amount of taxes collected in the administrative area of a municipality. This revenue is allocated towards  activities in urbanisation and related services.
• The municipalities are given the power to ask for information on wealth elements (properties and income) of physical and legal persons in their administrative territory.

In Greece, local governments have a medium degree of revenue autonomy,  around 36%% of revenues in 2017. Nevertheless, revenue autonomy has been increasing since 2000 when it was at 25%. In 2010 the figure was at 30%.The moderate revenue autonomy  results in a slightly higher fiscal imbalance and transfer dependency than the EU average. The transfer dependency in 2017 was 69% compared to the EU average of 48%.

Greek local authorities may raise debt from financial institutions in the country or abroad, but only for investment and debt-financing purposes and only under certain constraints:

• the annual cost of debt financing does not exceed 20% of annual regular revenues;
• the total debt of the region/municipality leading to the borrowing does not exceed a threshold percentage of its total revenues which is determined by a ministerial decision. The total debt of the region/municipality is defined as the sum of its short- and long-term obligations.

Sub-national governments also have the right to issue bonds, but this has not yet been exercised. Given the limited autonomy of the local governments, their debt levels are limited. Nevertheless, some local authorities have been bailed out by the state.