You want to reassure another person that you will keep them in the loop about a work-related matter. But is it suitable to say I will let you know in a professional email?
We’ll discuss the appropriateness of this phrase below. Thereafter, we’ll show you 9 alternative phrases that you can use at work.
Is It Correct to Say “I Will Let You Know”?
It is perfectly correct to say I will let you know if a colleague or superior has asked you a question and you don’t have the necessary information on hand.
This phrase is suitably polite and professional to use in a work email, regardless of the size or nature of your organization.
However, it comes across as fairly casual, so you may want to use a more formal alternative when speaking to a client or customer.
Nevertheless, let’s look at two email examples to see how we can use this phrase in practice:
I haven’t heard back from the client yet, but I will let you know the moment I do.
All the best,
Dear Ms. Neil,
Certainly. I will let you know when I have confirmation from their team.
Although the phrase I will let you know is correct and suitable for a professional email, it is considered a tad standardized.
Moreover, there are a number of more formal alternatives available for your emails to clients.
Therefore, to mix up your phrasing or to use a more formal register, you can try one of the synonyms we’ve compiled below.
9 Alternative Ways to Say “I Will Let You Know”
In this list, you’ll find 9 examples of how to say I will let you know professionally.
- I’ll get back to you
- I will update you
- I inform you
- I will keep you posted
- You will hear from me
- I will keep you apprised
- I’ll be in touch
- You can expect to hear from me
- I’ll be sure to follow up
1. I’ll Get Back to You
You can use the phrase I’ll get back to you to buy yourself some time when a coworker has asked you something and you don’t have access to the answer at present.
This phrase is too casual for an email to a client. However, it is suitable for an email to someone equal to you in your work hierarchy.
Moreover, it is fairly tonally neutral, so you can use it when you’re speaking to a coworker you aren’t particularly close to.
Let’s see an email sample that includes this phrase:
I’m afraid I don’t have an answer at present.
However, I’ll get back to you once I’ve had a word with Mr. Morgan.
2. I Will Update You
Another way to say I will let you know in a professional email is I will update you.
This phrase is most appropriate if you want to let your boss know that you will keep an eye on an ongoing situation and alert them when new information arises.
This phrase is fairly business casual, but people often use it in corporate settings. Therefore, it is perfectly appropriate to use I will update you when speaking to a superior.
Dear Mr. Rockwell,
I have received confirmation that the client’s plane has landed.
I will update you on her whereabouts in due course.
3. I Will Inform You
I will inform you is a great formal synonym for I will let you know, and you can use this phrase in an email to a client.
Furthermore, you can use this phrase regardless of the nature of your company or business.
It may come across as rather stuffy, but it’s a safe option when you’re speaking to a new client or responding to a query.
Moreover, I will inform you is a great choice to go with if you work in a public office and want to maintain a formal register in your communications with clients.
Consider the email example below:
Dear Miss Perriwed,
This email is to confirm receipt of your application.
I will inform you when a decision has been made by the relevant councilors.
4. I Will Keep You Posted
The phrase I will keep you posted is slightly less formal than some of the other alternatives on our list. However, it is used frequently in professional settings.
It can be used even when speaking to a superior, but it is most suited for a slightly more casual email to a colleague.
In fact, it is neutral enough to use even if you don’t know the receiver well, perhaps because they work in a different department.
Check out the following sample email:
Let me call the client to gain some insight on the matter.
I will keep you posted if I learn anything helpful.
All the best,
5. You Will Hear From Me
You can use the phrase you will hear from me in an email to a job applicant, especially if you are a hiring manager, a recruiter, or any person responsible for engaging with applicants or considering their applications.
This phrase uses very plain phrasing and is tonally neutral enough for an email to a stranger. Moreover, it maintains a professional tone without being overly formal.
In short, it’s very straightforward and comprehensible, which is ideal if the role is for a junior position.
See how we’ve used this phrase in an example:
Thank you for your interest in this position.
I can confirm that I have received your application, and you will hear from me within five business days with a response.
6. I Will Keep You Apprised
Another formal way to say I will let you know is I will keep you apprised.
This is a great choice if you want to keep a very formal tone in your emails to your employer or any other important person in your relevant industry.
For example, if you work in the legal realm, you may be expected to use formal phrasing in your correspondence with clients or other professionals.
Let’s see an email example that includes this phrase:
Dear Mr. Brenner,
I have issued the relevant documentation to the opposing party’s representatives.
I will keep you apprised of any response.
7. I’ll Be in Touch
I’ll be in touch is a more informal alternative that you can use in an email to a colleague, especially if you generally have a more friendly and casual dynamic in the office.
This phrase isn’t too informal for a work email, but we would recommend trying a more formal synonym in your emails to your boss or clients.
Nevertheless, have a look at how you can use this phrase in an email sample:
I’ll be in touch over the next few days to discuss the project further.
Thanks for offering to help!
All the best,
8. You Can Expect to Hear From Me
If you run your own business and recruit your own team members, you can respond to a job applicant with the phrase you can expect to hear from me.
Although the wording of this phrase is similar to you will hear from me above, it has a slightly different tone.
After all, this phrase implies that if you fail to reach out to the recipient within the time specified, they should feel free to follow up.
Therefore, this phrase has a more personable tone overall.
To see what we mean, check out the example below:
Thank you for your interest in this role.
I will be considering your application over the next few days.
You can expect to hear from me by Friday afternoon.
9. I’ll Be Sure to Follow Up
The phrase I’ll be sure to follow up has a rather friendly tone. Therefore, you can use it if you want to say I will let you know in a more polite way.
This phrase is by no means informal, but it does sound rather earnest. As such, it’s best suited for when you’re speaking to a colleague or a client, particularly if you want to sound more approachable in your work emails.
I have sent out the file as requested.
I’ll be sure to follow up if there are any changes to the situation.