Of the amount the UK had to pay to the EU, a rebate was deducted prior to making the payment. The EU also made payments to the UK private sector. The Office for National Statistics (ONS) did their calculations and compared them to those of the EU. The ONS stated,
"Using the latest available figures published by the EC, a wider estimate of flows between the UK and the EU can be calculated. This calculation considers the abatement, the money the EU sends to the UK government, and the money the EU sends directly to the UK private sector.
This is arguably a more complete picture of the money that flows between the UK and the EU and in 2018 the net flow was £8.6 billion.
However, in the last few years the EC figures have been volatile and so a five-year average has been taken to better represent a “typical” contribution.
The UK’s annual five-year average (2014 to 2018) net contribution on this wider basis was £7.8 billion; lower than the £9.8 billion ONS estimate of the annual five-year average which only captures official transactions between the EU and the UK government."
This means the average net contribution to the EU was £150 million to £188 million a week.