How to check a sort code & account number are valid - Mintly (2024)

Read time: 3 mins

Last updated: 6 May 2024

Each bank account number in the UK and Ireland is generated using an algorithm unique to that bank (and sometimes each branch within a bank). Bank account numbers are not generated sequentially, and the system used to generate them is designed to prevent account numbers from having similarity that can result in money being sent to the wrong account.

For example, a branch could generate an account number of "12345678" but would not generate an account number "12354678".

Bank Account & Sort Code Checker

How does it work?

Banks use a combination of "modulo" and "double-alternate" modulus checker algorithms, along with a set of "weights" to perform a mathematical calculation - all designed to help identify when account numbers have been entered correctly. The most common types of mistake are when numbers are swapped and these types of algorithms help identify that.

As new banks open and sort codes are issued, the algorithms for these banks need to be published and shared with banks. Mintly is constantly keeping its system updated with these new algorithms, so our customers have access to the latest data.

There are several ways to check an account number and sort code are valid. One is to obtain the directory of sort codes, and then implement the algorithms and weight database needed to perform the checks. This database then needs to be updated regularly whenever new data or algorithms are issued. To check a bank sort code is valid, you can use a lookup table and keep this table updated as the data changes.

Alternatively you can use a system like Mintly. Our database is updated weekly with the newest data and algorithms, and our stable API allows you to query a sort code, and account number. We'll tell you if it's valid and the types of payment that the branch supports. We make it really easy to integrate with existing systems too.

How to check a sort code & account number are valid - Mintly (1)

Need a bank account checking solution for your business?

If you're looking for an online sort code and account number checker then our online tools can give you unlimited checks. Or use our free sort code checker tool where you can check five accounts a day totally free! If you need a sort code checker for faster payments, BACS or Direct Debit then Mintly tools can help you.

To use our bank sort code and account number checker, you can login to our web UI and submit the details; our fast service returns the answer and tells you the name, location and contact details of the bank branch based on the sorting code, and tells you whether it is a valid bank account. Note that the algorithms used can only say whether an account number is valid or not; the account number may not be in use.

Not only can Mintly check sort codes and account numbers, we also check IBAN (International Bank Account Number) and SWIFT codes, which are used when sending money internationaly.

How it works

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See value right away, with higher payment success!

Automation - the next step to saving more money

For businesses wanting to automate their processes and integrate a sort code check or bank account modulus check into their own systems, Mintly offers an API (Application Programming Interface) that allows systems to talk to each other over the internet securely. Our API sends back all the bank details once validated, so that you can handle the next step in your workflow.

If you'd like to try Mintly out, we have a 14 day free trial for all our plans, or if you have further questions, please get in touch, we'd love to help you with your bank validation needs. Or book a demo with one of our experts, who are happy to help you get set up.

Related Posts

What is a sort code and why should I check it?

What is a SWIFT and IBAN?

Why should I check account numbers?

How to check a sort code & account number are valid - Mintly (2024)

FAQs

Can you check sort code and account number? ›

If you're looking for an online sort code and account number checker then our online tools can give you unlimited checks. Or use our free sort code checker tool where you can check five accounts a day totally free! If you need a sort code checker for faster payments, BACS or Direct Debit then Mintly tools can help you.

How do you check an account number is valid or not? ›

There are many ways to verify a bank account. You can ask the account holder to provide a bank statement, certificate, or a canceled cheque, which you can get verified with your own bank. This may take 1-3 business days. Penny testing is one of the easiest ways to verify a bank account.

Is sort code and account number enough? ›

Yes, it is safe to share your account number and sort code. In fact, you'll need to share these details any time you want someone to transfer money into your UK account. Your sort code and account number cannot be used to transfer money out of your account, only to put money in it, or to set up a direct debit.

How do I find my bank sort code? ›

If you have a cheque book, identify the set of three numbers underneath its leaf. The first set of numbers is your cheque number, the second is your bank sort code, and the last is your account number.

How to check if someone's bank details are correct? ›

How do I verify a bank account number? A bank account number can be verified by checking that the bank account numbers and codes provided satisfy the bank and branch rules, and therefore can exist. Verification also confirms that the numbers and codes are in the correct format for the payments to be processed.

How to verify a bank account number? ›

This is done through the verification of an identity number (or company registration number) against the bank account number supplied. That the bank account in question is presently open and active. That the bank account in question accepts debit and credit transactions.

How can I verify someone's bank account? ›

One common method of bank account verification is through micro-deposits. In this process, the account holder provides their account details to the service provider or financial institution. The provider then initiates two small deposits into the account, usually less than a dollar.

How to check if a bank transfer is legit? ›

A name that doesn't match an account can be a sign of a scam. You should speak to the payee to check it's really them requesting the payment and confirm the BSB and account number.

How to verify a check online? ›

Use Your Bank's Online Services:
  1. Log in to your online banking account.
  2. Navigate to the check verification or funds verification section.
  3. Enter the required information from the check, such as the account number and check amount.
  4. Follow the on-screen instructions to complete the verification process.
Jan 31, 2024

Can anyone take money with account number and sort code? ›

Sharing your bank account and sort code is generally unsafe, except with trusted entities like your employer or legitimate financial institutions. Giving this information to unknown or unverified individuals can jeopardise your finances, leading to unauthorised access, fraud, or identity theft. What is this?

What is an example of a sort code? ›

The definition of a sort code (aka Sorting Code ) in the context of United Kingdom and Ireland's bank industry and payments is a six-digit number, usually formatted as three pairs of numbers, for example 12-34-56.

Do you need a sort code for international transfer? ›

Which countries use sort code? Sort codes are used by banks in England, Wales, Scotland, and Northern Ireland. If you are making an international money transfer to any of these countries, you will need your recipient's sort code and account number.

Do US banks have sort codes? ›

You'll only need to use a sort code or routing number if you are transferring money to a UK or US-based account, respectively. For domestic bank transfers within the US, you will need to use the routing number.

Is sort code the same as routing number? ›

What is a bank routing number in the UK? In the UK, the equivalent of a bank routing number is a sort code – a six-digit code that identifies both the bank and branch of an account. Sort codes are used by British banks to route money transfers to the correct bank and branch when processing domestic transfers of funds.

What happens if you put the wrong sort code? ›

If you simply enter the wrong sort code, the money shouldn't leave your account as there isn't anywhere to process the payment. If the sort code's correct, the money will leave your account and head to the bank the sort code belongs to.

Can someone access my account with sort code and account number? ›

Overall, there's very little someone can do with just your account number and sort code apart from making a deposit into your account in order to pay you. However, always be vigilant with whom you share your personal details. Remember never to share your PIN with anyone.

Is sort code same as account number? ›

The account number identifies your unique bank account and the sort code identifies the branch and bank where you opened your account. Account numbers are eight digits long and sort codes are six digits long.

Is the sort code and account number in an IBAN? ›

IBAN stands for International Bank Account Number, which you can use when making or receiving international payments. Your IBAN doesn't replace your sort code & account number ─ it's an additional number with extra information to help overseas banks identify your account for payments.

Can you look up bank account numbers? ›

Every major bank has a mobile banking app and website through which customers can access their unique bank accounts and the numbers associated with those accounts. You'll also find these numbers on your bank statements.

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