If you need something done urgently, you can use any of the following options:
1. As soon as possible
Can you please reply to the customer’s email as soon as possible?
2. As promptly as you can
Kindly mail out the package as promptly as you can.
3. With prompt attention
This needs to be resolved with prompt attention.
4. Without undue delay
Please inform me of your decision without undue delay.
5. Specific date/time
Let’s discuss this on Monday, March 18th, at 3:00 PM.
If your request is not time-critical, consider using any of the following alternatives for more straightforward communication:
6. At a time that works for you
Let’s meet and brainstorm at a time that works best for you.
7. When you find a moment
Please return her phone call when you find a moment.
8. When your schedule permits
We should talk about this over lunch when your schedule permits.
9. Whenever you can
Please let me know what your thoughts are on this whenever you can.
10. Whenever you have time
I would love to pick your brain on the merger whenever you have time.
If you need other ways to say “at your earliest convenience,” you can use any of the synonyms found above.
As soon as I can
I’ll call you back as soon as I can.
As soon as possible
I’ll revise the draft and send it back to you as soon as possible.
Whenever I get the chance
I’m swamped, but I’ll make sure to complete that whenever I get the chance.
As quickly as I can manage
That’ll be completed as quickly as I can manage.
Once I am free to do so
I’ll respond with a more detailed answer once I am free to do so.