All public bodies must provide energy consumption data and activity metric data from their baseline period onwards.

Baseline choice and targets

A public body can select its preferred baseline from a choice of three periods. Your baseline is valid once you have reported sufficient data for every year from the start of your preferred baseline period. This only needs to be reported on a once-off basis. Schools have separate guidance on baselines.

The 33% savings target is applied to whichever baseline period is selected by the public body. Therefore, selecting a historical baseline will enable a public body that has taken early action to benefit from that action.

Choosing a baseline

The choice of baselines allows organisations to balance the effort of data gathering with the potential impacts of early action. Using multi-year baselines has the advantage of smoothing out any unrepresentative years in a baseline period:

Establishing a valid baseline

The following data must be submitted to establish a valid baseline for your organisation:

  • Energy consumption data for all energy consumed by the organisation in the baseline period
  • Activity metric data for the organisation in the baseline

For baselines based on either the 2001-2005 or 2006-2008 periods, the baseline EnPI is calculated by dividing the average annual energy consumption (as TPER) by the average annual activity metric value in the relevant period. These averages are calculated as arithmetic means.

Changing baseline periods

You can change your preferred baseline to one of the alternatives. To do this, you must provide sufficient valid data for every year from the new baseline period onwards. If you change baseline, your organisation will be the focus of greater scrutiny in terms of data verification assessment. Switching between the different baselines does not change the organisation's EnPI, but it does change the glidepath and hence the gap to the target.

Changing data submitted for baseline periods

If better data emerges, you can resubmit data for your baseline at a later date. However, resubmitting baseline data will be the focus of greater scrutiny in terms of data verification assessment.

Baselines for new organisations

The baseline period for organisations established since 2008 is the organisation’s first full calendar year in existence.

The organisation’s target is calculated on the basis of a constant glidepath of efficiency improvement from 2009 to 2020. For example, if a new entrant had a baseline in 2012, its 2020 target would be 8 x 3% = 24%.