The Purpose of Disaggregating Financial Data
A central government or a large metropolitan municipality is a massive conglomerate containing highly diverse operations. Consolidating all these disparate units into a single set of aggregated numbers can hide significant structural weaknesses. For example, a healthy central treasury might mask the imminent financial insolvency of a massive public healthcare sub-system. IPSAS 18 (Segment Reporting) and specialized sector reporting solve this by forcing the disaggregation of financial statements.
Defining a Reportable Segment
Under IPSAS 18, a segment is a distinguishable activity or group of activities of an entity for which it is appropriate to report financial information separately for the purpose of:
  • Evaluating the entity’s past performance in achieving its objectives.
  • Making decisions about the future allocation of public resources.

Segments are typically identified based on functional service programs (matching functional lines like Health, Education, Transport) or geographic jurisdictions (such as distinct states, provinces, or municipal zones within a national territory).
Disaggregated Presentation Requirements
For each reportable segment, the government must clearly disclose within its primary statements or note schedules:
  • Segment revenues, cleanly separating exchange revenue from non-exchange tax allocations.
  • Segment expenses, highlighting major non-cash components like depreciation and impairment write-downs.
  • The total carrying amount of segment assets and segment liabilities, allowing users to calculate the exact capital intensity and debt concentration of individual public programs.

 
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