“I will keep you posted”: Meaning & alternatives + 3 example sentences

There are quite a number of expressions in English that most of us native speakers take for granted. When we use these expressions, we don’t give them a second thought. The expression in question today is “I will keep you posted”. This expression is prevalent not only in our professional life but our personal one as well.

What does “I will keep you posted” mean?

Telling someone “I will keep you posted” means that you are going to provide them with continuous updates or new information concerning a particular mater. This expression is typically used when talking about a situation or even that is constantly evolving, one that needs vigilance and attention.

Where does “I will keep you posted” originate from?

In order to fully comprehend what “I will keep you posted” means, it is important to begin with the critical word “posted”. While post has various definitions, in this context means to publish or announce.

For example, if someone says, “the required criteria was posted on the bulletin board”, it simply means that the required information was published or announced via a display on the bulletin board. The origin of the word “post” comes from “postis” which Latin for doorpost. This is similar to the Old French meaning where “post” meant beam or pillar.

Prior to the advent of the internet, announcements, particularly public ones were made by putting pieces of paper to beams or post, and it is likely where post gets its meaning as a verb.

3 examples of how to use “I will keep you posted” in a sentence

How to use “I will keep you posted” in a personal setting

In this instance, saying “I will keep you posted” means that you aim to tell your friend or acquaintance continued information, particularly information that will be updated later in the future. For example, your friend could be asking you if your company is hiring and if you aren’t sure of the information, you could let them know you intend to find out and deliver your findings to them.
Friend: So, I heard XYZ is hiring, do you know anything about it?

You: I heard something about it in the works but I’m not quite sure. Let me find out,

Friend: If you do can you let me know about it?

You: Sure thing, I will keep you posted.


Friend: are you guys going out to the club tonight?

You: the guys have talked about it but there aren’t any concrete plans yet

Friend: will you tell me if there are?

You: alright, I’ll keep you posted

How to use “I will keep you posted” in a professional setting

‘I will keep you posted” can also be used in a professional setting such as a work environment. Nevertheless, since this phrase isn’t fully formal, you will want to be cautious when using it. This means that it should be reserved for your work friends and colleagues. Additionally, you can use it with your business partners, customer and superiors if the situation in question doesn’t need you to be overly formal.

For instance, you can say the following if you have an informal rapport with your superior:

Superior: Hey, have we heard anything from our client?

You: No, we haven’t yet. I checked with them last week and the response I got was that the proposal was still being assessed.

Superior: Ok, let me know if there are any developments.

You: I will keep you posted.

How to use “I will keep you posted” in a written medium

“I will keep you posted” is an expression that equally applies to any written medium. Nevertheless, when a message is being written, you will discover that you are much more formal to the person that you would if you were actually speaking to them face to face.

For instance, something that might ordinarily seem appropriate when having a personal conversation, might not quite fit when writing an official document or email.

Dear, XXX

Prior to our last correspondence, there have been no new developments, however, the deadline for the deal is next week. I can expect things will pick up by that time. I will keep you posted”

It is important to note that this idiom when written is a lot more formal than when spoken and should only be used in either informal or accepted formal situations.

I will keep you posted (informal)

I will keep you posted (written correspondence/formal)

If you aim to be a little more informal you could use idioms such as “I’ll keep you in the loop”, “I’ll make sure you get caught up” and “I’ll get you up to speed”. The idioms mentioned all mean the same thing and have the same context as “I will keep you posted”. It simply means that you are promising to inform someone of any potential changes to particular situation down the line.

Alternatives to saying “I will keep you posted”

Considering that this phrase doesn’t quite translate in extremely formal scenarios, there are some alternatives that can be used instead. For instance, if you are writing professionally, your writing will need to be as impersonal as possible. This means switching out “I” for “we”.

“We will keep you abreast”

Just by the addition of “we” and “abreast”, you can tell that this conversation or medium would be much more formal. Example:

“We will keep you abreast of any developments”


“Should there be new developments, we will be sure to keep you abreast”

“Make sure you are caught up”

This example is a lot more informal as it can be used amongst acquaintances and friends. It means the same thing as “I will keep you posted” only informal.

“Hey, I know you’ve been away for a while and quite a lot has happened. But don’t worry, I will make sure you are all caught up”

“You are the new guy? There’s a meeting at the end of the week. Make sure you are caught up”