- I am looking forward to hearing or I look forward to hearing
- I am looking forward to your reply I look forward to your reply
- I am looking forward to working with you or I look forward to working with you
All the above forms are are correct and may be used in formal correspondence. The main difference is between their levels of formality.
I’m looking forward to hearing from you (using the Present Progressive form) is not as formal as I look forward to hearing from you (using the Present Simple form).
So, if you would like to sound really formal, for example when writing a cover letter or when contacting an important client, use I look forward to.
If you have already established a semi-formal relationship with the person you are writing to, use I’m looking forward to.
If you would like to learn more about the differences between formal and informal phrases used in emails, read Formal and Informal Email Phrases – from Greetings to Closing Phrases!
