First of all, thank you letters are not an expectation. So don't worry too much about them. 

If you do want to send them, I guess you're doing so because you genuinely appreciate the time they invested in evaluating you and having a conversation. In that case, you should write too all of your interviewers, not only the ones that passed you the interview or from the firm that you're going to join.

Best,
Cristian

———————————————

Practicing for interviews? Check out my latest case based on a first-round MBB interview >>> SoyTechnologies  

I'd only do after acceptance. Should you not accept also good practice to thank, you might meet a second time ;-)..

What is the objective you are trying to accomplish?

• One would usually thanks after the interview (because it is polite, and because you hope it will help your chances)
• Then one would do it after gettting an offer, if they want to engage again in a conversation and discuss pros and cons of joining the firm.
• Otherwise one would just decide, and then send an email informing them - if positive, to start building your support network from day one; if negative, to try keep a communication point there (i.e., don't burn the bridge). And, of course, to be polite.

Hi,

If you really want to, I would only send a thank you letter to your interviewers only after you've decided to accept the offer. Don't really see the reason to send one if you are still unsure about it.

Regards,
Nick

Hi,

I would send them a letter after you have made a decision

• If you accept - then it's a positive one where you say you look forward to working with them etc.
• if you decline - then its to thank them for the time and keep the connection

Frankly it doesn't really matter even if you don't send one, especially if you are going to accept the offer. People will remember you wayyyy more if you actually perform on the job.

Hi there,

Thanking someone for their time and a good interview experience is different from accepting/declining an offer. In my view, you can absolutely send a thank you note without getting into details as to what your decision may be.

That doesn't mean that you should do it, which is ultimately a personal preference. In my view, it's a courtesy that's generally well received and I would probably do it.

Best of luck!
Moritz

Hi there,

First, congrats on the offer(s)!

Personally, for some interviewers I did send an email even when declining. It was only if we have a particularly personal/close connection.

When accepting, I sent emails to all interviewers when I accepted. 

This won't make or break anything, but it is the proper etiquette (and you are likely to see these people once you join)

Hi there,

First of all, congratulations on the offer!

I would be happy to share my thoughts on your question:

• First of all, sending a thank-you letter after an interview is a gesture of professionalism and gratitude. It shows appreciation for the interviewer's time and can leave a positive impression, which, unfortunately, very few candidates do.
• Moreover, whether you decide to accept the offer or not, thanking your interviewers is a way to maintain a good relationship with them. The consulting world can be small, and you never know when you might cross paths with these individuals again.
• Lastly, I would advise you to send the thank-you letters shortly after receiving the offer. Whether you decide to accept the offer later is a separate matter and should not impact your decision to express gratitude.

If you would like a more detailed discussion on your specific situation, please don't hesitate to contact me directly.

Best,

Hagen

Congratulations on receiving the offer, that's great news! In terms of sending thank-you letters, it's generally advisable to do so after you have taken some time to contemplate the offer and make a decision. Sending a thank-you letter implies that you have accepted the offer, so it's best to wait until you have made a final decision before expressing your gratitude. This way, you can ensure that your thank-you letter aligns with your final decision and avoids any confusion. Taking the time to contemplate the offer shows professionalism and thoughtful consideration. Let me know if you have any other questions!