Thank You Email Timing And Etiquette
Related tool: Interview Thank-You Email
Within 24 hours is the general rule, and sooner is generally better — same-day, when possible, while the conversation is still fresh for the interviewer too.
If you interviewed with multiple people, a short individual note to each (not one message CC'd to everyone) is worth the extra few minutes it takes, especially for smaller or more senior interview panels.
For panel or group interviews where individual notes aren't practical, a single note to the main point of contact, asking them to pass along thanks to the rest of the panel, is a reasonable middle ground.
Keep it brief. A thank-you email is a gesture, not a second cover letter — a few sentences referencing something specific from the conversation does more than a long recap of your qualifications.
If you haven't heard back by the timeline you were given, a brief, polite check-in is appropriate — but the thank-you note itself shouldn't double as that follow-up. Keep the two separate and spaced out.