Make an online or telephone bank transfer
You can pay your Self Assessment bill using Faster Payments, CHAPS or Bacs.
Account details to use
Account name: HMRC Cumbernauld
Account number: 12001039
Sort code: 08-32-10
Payment reference to quote
You’ll need to use your 11-character payment reference when you pay. This is your 10-digit Unique Taxpayer Reference (UTR) followed by the letter ‘K’.
https://www.gov.uk/pay-self-assessment-tax-bill