IHTM10252 - Certificates of tax deposit: calculating interest

Certificates of Tax Deposit (CTD) carry simple interest calculated on a daily basis from the date of deposit until the earliest of either:

  • the date of payment of the tax which they are being used to pay
  • the date on which they are surrendered for cash, or
  • six years after the date the deposit was made.

Full details of how interest is paid on CTDs can be found on ÒÁÈËÖ±²¥.

Where the certificate is purchased after the date that a tax liability became due, interest is not added to the deposit, but no further interest is charged on the equivalent amount of the tax liability.