This paper describes the compilation of a preliminary input-output able for 2005/06 for use in the ESSAM (Energy Substitution, Social Accounting Matrix) general equilibrium model. A more accurate update is expected to be undertaken in 2009/10 with the envisaged release by Statistics New Zealand of an official set of input-output tables for 2005/06. The last official set of input-output tables produced by SNZ relates to 1995/96. The updating process comprised four main phases: 1. Analysis in the SNA Data Laboratory 2. Balancing of the input-output table 3. Re-aggregation of industries 4. Update to 2005/06