Index of Production, UK: June 2025

• Monthly production output was estimated to have increased 0.7% in June 2025; this follows a fall in May 2025 (down 1.3%) and no growth during April 2025 (0.0%).

• The rise in monthly production output in June 2025 resulted from increases in “manufacturing” (up 0.5%), “electricity and gas” (up 3.3%), and “water supply and sewerage” (up 0.5%); this was partially offset by a fall in “mining and quarrying” (down 0.4%).

• 8 of the 13 manufacturing subsectors saw a rise in June 2025, with the largest positive contribution coming from “computer, electronic and optical products” (up 8.8%); all other positive and negative contributions to monthly production growth were less than 0.1 percentage points.

• Production output was estimated to have decreased (down 0.3%) during Quarter 2 (Apr to June) 2025, compared with Quarter 1 (Jan to Mar) 2025.

• The largest negative contributor to the quarterly fall in Quarter 2 2025 came from “electricity and gas” (down 6.8%), supported by “mining and quarrying” (down 0.3%); this was partially offset by increases in “water supply and sewerage” (up 2.1%) and “manufacturing” (up 0.3%).

• The large quarterly fall in “electricity and gas” in Quarter 2 2025 was from declines in both “electric power generation, transmission and distribution” and “manufacture and distribution of gas”; while both industries saw increases on the month in June 2025, they declined in both April and May.

All data related to the Index of Production (IoP) are available on our Related data page.

The Index of Production (IoP) uses data from a variety of sources. It is calculated by taking turnover and removing the effect of price changes, or by using direct volume estimates.

Most of these data are collected as “turnover values” through the Monthly Business Survey (MBS). Direct volume series are also collected by the Department for Energy Security and Net Zero (DESNZ), and the International Steel Statistics Bureau (ISSB) for steel industries.

The MBS is fully online. Business owners can log on from any location and submit their data at an appropriate time.

From January 2018, Value Added Tax (VAT) data have also been included for 64 production industries for small-and medium-sized businesses. More information is available in our VAT turnover data in National Accounts: background and methodology.

A comprehensive list of the IoP source data can be found in our Gross domestic product (GDP) data sources catalogue.

Response rates for June 2025 

MBS response rates were 76.1% for June 2025, based on forms returned. This accounted for 89.0% of total turnover coverage of the sample population. For further information, see our current and historical MBS (production) response rates dataset.

Quality and methodology 

The data reported in IoP bulletins and datasets are estimates that are subject to uncertainty, such as sampling variability and non-sampling error. More information is available in Section 2 of our Uncertainty and how we measure it for our surveys web page.

More quality and methodology information (QMI) on strengths, limitations, appropriate uses, and how the data were created is available in our Index of Production, UK QMI.

Accredited official statistics

These accredited official statistics were independently reviewed by the Office for Statistics Regulation in April 2014. They comply with the standards of trustworthiness, quality and value in the Code of Practice for Statistics and should be labelled “accredited official statistics”.

Revisions to Index of Production

In line with the National Accounts Revision Policy, this release gives data for June 2025 for the first time, with April 2025 and May 2025 open for revision.

Pausing of Producer Prices publications

Business prices data with corrected chain linking methods have been used in the Index of Production (IoP) dataset for producer price indices (PPI), import prices indices (IPI) and export price indices (EPI) from January 2025 onwards.

Correctly chain-linked service producer price indices have also been included in our IoP dataset from April 2025 onwards. The quarterly services producer price indices (SPPI) estimates are splined to months for use in IoP calculations.

The full implementation of updated business prices data will be managed in line with the National Accounts Revision Policy. The full time series update will be included in our GDP quarterly national accounts, UK: April to June 2025 release, publishing on 30 September 2025, and our Blue Book 2025 publication.

Further information on the chain linking error in the producer prices dataset was published on 10 July 2025 in our Growth rates of selected output and input PPI and SPPI article.

Seasonal adjustment

The monthly estimates of IoP are seasonally adjusted. Seasonal adjustment is the process of removing the variations associated with the time of year, or the arrangement of the calendar, from a data time series.

IoP estimates, as for many data time series, are difficult to analyse using raw data because seasonal effects dominate short-term movements. Identifying and removing the seasonal component leaves the trend and irregular components.

We use the X-13-ARIMA-SEATS approach to seasonal adjustment. Seasonal adjustment parameters are monitored closely and are regularly reviewed. For more information, please see our Seasonal adjustment methodology page.

In our IoP estimates, seasonal adjustment is applied at the industry level. The seasonally adjusted series are aggregated to create estimates by sector and total IoP output. As part of our quality assurance approach, residual seasonality checks are regularly completed by our time series analysis team on both the directly seasonally adjusted series and the indirectly derived aggregate time series.

This topic is explored further in our Assessing residual seasonality in published outputs methodology published 9 May 2025.