The STP reporting year is based on the July – June financial year. Within any given reference month, STP reporting may be incomplete for a range of reasons including, but not limited to:
- different business reporting habits,
- different pay cycle period reporting.
It has been observed that STP data for each month in a given financial year can be affected by updated STP data beyond the conclusion of that financial year.
In the first MEEI release in June 2023, the calculated daily rate was imputed up to 42 days forward, with conditions relating to:
- the last payment received,
- the job holder’s pay frequency, and
- the data vintage used to compile the reference month.
This method resulted in a low rate of imputation and did not fully account for all pay period or business reporting frequencies.
It is particularly challenging to account for the reporting behaviours of around 700,000 reporting businesses within the STP dataset. The STP dataset is still relatively new and as such, the methods used to compile these experimental estimates are evolving.
From this release, the imputation method has been updated to better account for part period employer reporting in the latest 3 months of data. It achieves this by imputing the daily rate of a jobholder until the end of the reference month in which the jobholder last received a payment, unless they have a termination date and/or termination payment. Imputation is only applied in the latest 3 months of data. For example, in the 21 November 2023 release, imputation is only applied for the July, August and September 2023 reference periods.
The updated method is considered to improve the quality of the level estimates in the latest 3 reference months, but can affect interpretation of change in the first month of the 3 month imputation window. See the Imputation period section in Factors affecting interpretation for more information.
Employers who have not reported for any employees during a reference month are not imputed, and are accounted for in a later process (weight adjustment).
Imputation is only applied to in scope earnings payments (wages and salaries). Other earnings payments such as lump sum leave are not imputed.
Imputation relating to new employees
No imputation is applied for new employees (related to existing or new employers) without historical payment information, until a pattern can be determined. This means that there can be a lag before a new employee contributes to the estimates (after their initial pay period). The lag is longer for new jobs with employers that have less frequent payment and reporting periods. No adjustment is applied to account for this new job lag.