Dear Samantha,
Information about commercial use of Understanding Society data can be found on the UK Data Service website:
https://www.ukdataservice.ac.uk/get-data/how-to-access/registration/commercialusers
https://www.ukdataservice.ac.uk/get-data/how-to-access/charges
Depending on whether your use of the data is defined as "commercial", the charges may or may not apply. You would need to contact the UK Data Service directly to discuss this further.
Understanding Society also has a Data Access Strategy which provides the following guidance for commercial use of the data:
"Commercial organisations can apply for access to Understanding Society data and are subject to the standard procedures. For some data the terms of consent may prohibit commercial access. As per any application commercial organisations will be required to demonstrate the public benefits that are likely to flow from the research use. Applicants must confirm that their use of the data is for research purposes and not for commercial exploitation. No organisation, commercial or otherwise should be allowed to gain control or ownership over the Understanding Society resource.”
For all data access queries, please contact the UK Data Service directly. Here at the Understanding Society team we have a Policy Unit which works to promote the use of our data, and evidence generated by it, to non-adacemic audiences (https://www.understandingsociety.ac.uk/policy)- we are keen to build liks to the financial sector, and in that regard the Acting Director of the Policy Unit, Raj Patel, would be happy for you to get in touch with him about your project in general. His email address is: rajpatel@essex.ac.uk.
Hope this helps,
Best wishes, Victoria.
On behalf of the Understanding Society Data User Support Team
Updated by Victoria Nolan 
Updated by