Expenditure Department prepared the annual budget of the Federal Republic of Nigeria and also releases monthly and quarterly warrants and AIE.

• Organisation of annual Pre-Budget Workshops for Ministries/Extra-Ministerial Departments;
• Issuing of Annual Call Circulars to all Federal Ministries, Extra-Ministerial Departments, State-owned Companies and Corporations;
• Preparation of Recurrent and Capital Budget for all Federal Ministries, Extra-Ministerial Departments, State-owned Companies and Corporations;
• Publication of Annual Budget Book;
• Control of Expenditure in respect of Reserved Votes;
• Assessment and analysis of requests for extra-budgetary Capital and Recurrent Expenditure from Federal Ministries, Extra-Ministerial Departments, State-owned Companies and Corporations;
• Release of Funds through Recurrent and Capital Development Fund General Warrants Quarterly and by means of Authority to Incur Expenditure (AIE);
• Examination of Returns and Progress Reports on expenditure from Federal Ministries, Extra-Ministerial Departments, State-owned Companies and Corporations;
• Preparation of annual report on Federal government expenditure.