We have produced a new guide to the economy forecast where, for each aspect of the economy, we detail what drives our forecasts.
Our forecasts include estimates of the effect of new policies announced by the Government. These estimates are known as ‘costings’. This page sets out how we deal with costings and allows you to explore what we or the Government said about specific policies announced since 2010.
If you would like to get into the detail of how we work at forecast time, this page sets out the steps in the forecast process – when we start, when we provide the Chancellor with updates, how we bring everything together ahead of publication day – as well as collating all the detailed briefing, working and other papers that we have published since 2010.