You asked
Please provide statistics on disposable income by age group based on people aged 18 to 90.
We said
Thank you for your request.
Your request is answered by some ad hoc analysis of average household income, by age of the head of household, that we have completed in response to a user request. This ad hoc analysis accompanies our statistical bulletin on the Effects of taxes and benefits on UK household income: financial year ending 2017. Please refer to this bulletin for the definition of disposable income and a comprehensive analysis of factors impacting disposable income.
If you require any further assistance our contact email address for average household income statistics is hie@ons.gov.uk.