- Thanks.
- Thanks a lot.
- Thank you so much.
- Thanks a million!
- Thanks for your help. / Thanks for helping me.
- I really appreciate it.
- I’m really grateful.
- That’s so kind of you.
- I can’t thank you enough.
(for extremely important things) - I owe you one.
(this means you want/need to do a favor for the other person in the future)
