For UK-based applicants, there are only two dates a year you can apply for professional membership (and registration if applicable).
1 February and 1 August
| February | August | ||
| 1 | Your application will be reviewed by CIBSE staff | 4-6 weeks from receipt of application | 4-6 weeks from receipt of application |
| 2 | CIBSE start arranging your interview | From mid March | From mid September |
| 3 | Official interview confirmation sent by email. | 2 weeks prior to interview | 2 weeks prior to interview |
| 4 | Interviews are held | April & May | October & November |
| 5 | Membership & Registration panel meet | End of May | End of November |
| 6 | You will be notified of your application result by email. | By mid June | By mid December |
| 7 | Welcome pack send by post. | 2-4 weeks | 2-4 weeks |