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Midata allows you to download 12 months of transaction history from your current account and upload that information to independent comparison sites. The sites then use your transactions to compare current accounts, based on your spending habits.

You can access your midata file from your 'Download transactions' page on Online Banking. Please note that personal data is masked in the midata files you download and it is your responsibility to keep your data safe. Please see the security tab for guidance.

Find out more about Online Banking

Working to make banking fairer
Midata is an industry initiative that major UK banks, including Santander, have signed up to.

This service allows you to download 12 months of transaction history from your current account. Each bank will provide this information in the same format (CSV file), which you can then upload to independent comparison sites. 

These sites analyse your information and show you a comparison of current accounts based on your spending habits from the previous 12 months.

How do I use midata?
You can easily download your midata information from Online Banking. Simply log on as you normally would and follow the instructions below:

  • From the 'My Accounts and Transactions' tab, select the current account you'd like to compare

  • Click on the 'Download transactions' link above the transactions table

  • In the 'Download to' drop-down menu, select 'midata (CSV)' and click on the 'Download' button

  • Read and confirm that you're happy with the information displayed

  • Click on the 'Continue' button and the file will download - you can then save it to your preferred location as a CSV file

Your midata file won't contain any personal information such as name, address or account number and potentially sensitive transactions are masked for your security.

Once you have downloaded your midata file it is your responsibility to keep it safe. See the security tab for guidance.


Where do I use midata?
When you have downloaded your midata file from Online Banking and saved it to your computer you can visit a comparison website that offers the midata service. 

  • We recommend that you check the comparison site confirms they have signed up to the midata code of practice.

  • They will ask you to upload your midata file

  • You will then be presented with your result based on how you have managed your account

We're committed to keeping your information safe. That's why personal data is masked in the midata files you download from Online Banking. When you upload your information to comparison sites, they'll only be able to see the sets of data they analyse for you to produce your comparisons.

The comparison sites won't ask you for your name or contact details when you give them your transaction history. Also, each bank and comparison site offering the midata comparison has agreed to the code of practice on how to keep your data private, and will follow data protection standards. 

If you have a joint account and would like to use this service, you must make sure that all other account holders are happy for you to download the file and upload it to a comparison site. 

Once you have downloaded your midata file it is your responsibility to keep it safe.

When uploading your data, please choose a reputable comparison site that you are confident will use your information in a safe way.

Keeping your midata information safe
If you store your midata file on your computer or device, make sure you protect the information by:

  • using a PIN lock or password on a mobile device to prevent unauthorised access

  • making sure that your virus protection software is up to date

  • using secure Wi-Fi when you access the data over the internet

  • deleting your midata from your computer or device (including information stored in back-up files) when you no longer need it

If you'd like more information on how to protect your computer, the Get Safe Online website offers a range of tips. Our Online & Mobile Banking Security Factsheet and security pages can also tell you about software to help protect your computer as well as using strong passwords and log in details. 

The banks and comparison sites involved in midata have agreed to a code of practice on how it should work. You can see the code and more information on midata at

We've summarised the important information for you below.


  • will remain impartial in reference to midata comparison providers

  • will make customers aware of how to keep their data safe

  • will commit to making sure that all midata files are accurate

Comparison sites:

  • will offer an impartial service that doesn’t favour any bank or product

  • will make sure the search results of current accounts you may be eligible for are clear and comprehensive

  • will treat customers fairly by using up-to-date product information and detailing any costs that are involved within any calculation

The banks and comparison sites all commit to answering any queries about midata.

Santander UK plc. Registered Office: 2 Triton Square, Regent's Place, London, NW1 3AN, United Kingdom. Registered Number 2294747. Registered in England and Wales. Telephone 0800 389 7000. Calls may be recorded or monitored. Authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority. Our Financial Services Register number is 106054. You can check this on the Financial Services Register by visiting the FCA’s website Santander and the flame logo are registered trademarks.