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Information release

Miscalculation of Disposable Income Information Release

Issue date: 
Thursday, 27 February 2014
Corporate author: 

The Treasury has released reports relating to data miscalculations affecting estimates of disposable income.

The Treasury and Statistics New Zealand conducted two thorough reviews into the miscalculations. The reports of these reviews and the Treasury-commissioned Deloitte peer review have been released here.

Read the media statement issued by the Treasury and Statistics New Zealand: Data error prompts process improvements (27 February 2014).


The release documents listed here are available in Adobe PDF format only. HTML versions can be supplied on request by Information Services at the Treasury.
Using PDF Files
Doc. Date Creator Title View/Download
20 Feb 2014 The Treasury Internal Report: Report on the Review of Communication and Handover Processes Relating to the Transfer of Household Economic Survey - Taxwell Data between Treasury and Statistics New Zealand mdi-2823331.pdf (147 KB)

20 Feb 2014 The Treasury Internal Report: Review of Accuracy of Taxwell Dataset and Associated Documentation Provided to Statistics NZ mdi-2823936.pdf (149 KB)

21 Feb 2014 Deloitte Report Prepared for the Treasury: Peer Review of Treasury's Internal Review of the Taxwell Model Issues mdi-2848114.pdf (187 KB)

Information Withheld

Certain information in these documents has not been released as it is either not relevant to governance issues, or has been withheld under one or more of the following sections of the Official Information Act, as applicable:

  • [1] section 9(2)(a) – to protect the privacy of natural persons, including deceased people, and
  • [2] section 9(2)(g)(i) - to maintain the effective conduct of public affairs through the free and frank expression of opinions.

In preparing this Information Release, the Treasury has considered the public interest considerations in section 9(1) of the Official Information Act.

Contact for Media Enquiries

Bryan McDaniel, Principal Communications Advisor, The Treasury
Tel: +64 4 917 6268
Mob: +64 21 817 207
Last updated: 
Wednesday, 26 February 2014