If you are planning on applying to Oxford or Cambridge (because you can only do one), or to Direct-Entry Medicine, Veterinary Medicine, or Dentistry programs at a University in the United Kingdom, your deadline for submitting the UCAS Application is October 15. Given the DUE DATE-DO DATE Policy, that means you need to ensure that all of your application material is ready for review by September 15!
All other applications need to be submitted by the Equal Consideration deadline of January 14, 2026. Given the Do Date/Due Date Policy, that means having your Personal Statement drafted by late November. The sooner you get your UCAS application submitted, the better!