How long you wait
| Failed attempt | Scored 30 to 59 | Scored under 30 |
|---|---|---|
| First | Re-sit when you like | 6 months |
| Second | 3 months | 9 months |
| Third | 6 months | 12 months |
| Fourth or later | 12 months | 12 months |
No limit on attempts
TfL's policy says you can retake the written exam as many times as you wish; failing it is not a reason to refuse your application. But if you do not ask for a re-sit within the time you are given, your application is ended.
Each sitting is paid
£225 a time. A score under 30 costs you the most: a longer wait as well as another fee.
Sources
- TfL, Introduction to the Knowledge of London, March 2022, page 10, Appendix B
- TfL, Taxi and private hire driver policy, version 6.0, 1 September 2026, section 3.11.1
From the guide: The stages of the Knowledge