Sometimes you need to tell someone that you will provide an update after completing a task. While I will let you know once it is done is clear, repeating the same phrase can make emails, workplace messages, and everyday conversations sound predictable.
The best alternative depends on your tone and situation. You might want something professional for a client, concise for a coworker, polite for a manager, or casual for a friend. Below are practical alternatives with examples so you can choose wording that sounds natural without changing the intended meaning.
Other Ways to Say I Will Let You Know Once It Is Done
Here are some of the most useful alternatives for professional and everyday communication:
- I will update you once it is complete.
- I will let you know when it is finished.
- I will keep you posted once it is done.
- I will notify you when the task is complete.
- I will get back to you once it is finished.
- I will inform you as soon as it is complete.
- I will send you an update when it is done.
- I will keep you informed once it is complete.
- I will reach out when everything is finished.
- I will let you know as soon as I finish it.
- I will update you when the work is complete.
- I will confirm once it has been completed.
- I will follow up once the task is finished.
- I will get in touch when it is ready.
- I will share an update once everything is complete.
Professional Ways to Say It in an Email
For business emails, choose wording that sounds direct and respectful. These options work well when communicating with clients, managers, coworkers, or business partners.
- I will provide an update once the work is complete.
- I will notify you as soon as the task is completed.
- I will follow up once everything has been finalized.
- I will keep you informed once the work is finished.
- I will send confirmation once the task is complete.
- I will update you when the requested work has been completed.
- I will get back to you once I have completed the task.
- I will reach out once the work is ready for review.
- I will confirm completion once everything is finalized.
- I will share the completed work with you once it is ready.
Example:
I am currently reviewing the document. I will provide an update once the work is complete.
This version sounds professional without being overly formal.
Formal Alternatives for Business Communication
A more formal phrase can be useful when writing to a client, senior colleague, organization, or external contact.
- I will notify you upon completion.
- I will provide confirmation upon completion.
- I will inform you once the process has been completed.
- I will provide an update once the matter has been finalized.
- I will contact you upon completion of the task.
- I will confirm once the requested work is complete.
- I will communicate the outcome once the process is finalized.
- I will advise you once the work has been completed.
Use formal alternatives selectively. Very formal wording can sound stiff in a casual workplace.
Short and Concise Alternatives
If the recipient already understands the context, you can keep your message brief.
- I will update you when it is done.
- I will let you know when it is ready.
- I will update you once finished.
- I will follow up when complete.
- I will confirm when ready.
- I will keep you posted.
- I will get back to you when it is done.
- I will notify you once complete.
- I will follow up once finished.
- I will confirm once it is ready.
These work especially well in instant messages, project chats, and short emails.
Polite Ways to Say You Will Provide an Update
When you want to sound helpful and considerate, these alternatives make the promise to update the other person clear.
- I will be sure to let you know once it is complete.
- I will keep you updated as soon as the work is finished.
- I will make sure to follow up once it is ready.
- I will keep you posted when everything is complete.
- I will be happy to provide an update once it is finished.
- I will make sure you receive an update when it is ready.
- I will reach out as soon as I have completed it.
- I will keep you informed throughout the process and confirm when it is complete.
Casual Ways to Say It
For friends, classmates, teammates, or coworkers you know well, a relaxed expression usually sounds more natural.
- I will let you know when it is done.
- I will give you an update when it is ready.
- I will message you when I finish it.
- I will let you know when I am finished.
- I will keep you posted.
- I will get back to you when it is ready.
- I will tell you once I finish it.
- I will send you a message when it is done.
- I will check back with you once it is finished.
The casual options work best when the situation does not require formal business language.
Ways to Say It to a Client or Customer
Client communication usually benefits from clarity, reassurance, and a specific commitment to follow up.
- I will update you as soon as the work is complete.
- I will notify you once your request has been completed.
- I will confirm once everything is ready.
- I will follow up as soon as the requested work is finished.
- I will keep you informed of the progress and confirm when it is complete.
- I will contact you once the work is ready for your review.
- I will send you confirmation once the process is complete.
- I will reach out as soon as everything has been finalized.
- I will provide an update when your request is ready.
- I will let you know as soon as I have completed the requested changes.
Ways to Say It to Your Manager
When speaking to a manager, direct and professional wording usually works best.
- I will update you once I have completed the task.
- I will let you know when the work is finished.
- I will confirm once everything is complete.
- I will follow up when I have finished the assignment.
- I will provide an update once the task is ready for review.
- I will notify you when I have completed the requested work.
- I will get back to you once I have finished it.
- I will confirm completion as soon as the work is done.
Avoid unnecessary detail when a simple completion update is all your manager needs.
Ways to Say It to a Coworker
Coworker communication can be professional without sounding overly formal.
- I will let you know once I finish it.
- I will update you when it is ready.
- I will keep you posted.
- I will message you once it is done.
- I will get back to you when I finish the task.
- I will let you know as soon as I have an update.
- I will follow up once I have finished.
- I will send it over when it is ready.
- I will confirm once I am done.
Alternatives for Project and Task Updates
When discussing projects, deadlines, or assigned work, it helps to mention the specific task rather than relying on it.
- I will update you once the project is complete.
- I will confirm when the task is finished.
- I will let you know once the changes are complete.
- I will provide an update when the revisions are finished.
- I will notify you once the report is ready.
- I will follow up when the review is complete.
- I will let you know once the final version is ready.
- I will send the completed file once I finish the work.
- I will confirm when the requested changes have been made.
- I will update you once the final checks are complete.
Alternatives When You Want to Emphasize Speed
If you expect to finish soon, wording such as as soon as or promptly can communicate urgency without promising an unrealistic deadline.
- I will let you know as soon as it is complete.
- I will update you as soon as the work is finished.
- I will notify you as soon as I have completed it.
- I will get back to you promptly once it is ready.
- I will follow up as soon as everything is finalized.
- I will contact you as soon as I have an update.
- I will confirm as soon as the task is complete.
Only use as soon as when you genuinely expect to provide the update promptly.
Alternatives for Emails About Completed Work
If someone is waiting for a finished document, revision, report, or other deliverable, these phrases make the next step clear.
- I will send the completed document once it is ready.
- I will share the final version when the revisions are complete.
- I will forward the finished report once I have finalized it.
- I will send you the updated file once the changes are complete.
- I will provide the final version as soon as it is ready.
- I will share the completed work once I have finished the final review.
- I will send confirmation once everything has been finalized.
- I will forward the completed materials once they are ready.
Which Alternative Should You Use?
The best phrase depends on who you are speaking to and what you are promising.
| Situation | Best option | Tone |
|---|---|---|
| Formal email | I will notify you upon completion. | Formal |
| Client | I will provide an update once the work is complete. | Professional |
| Manager | I will update you once I have completed the task. | Professional |
| Coworker | I will let you know when I finish it. | Natural |
| Quick message | I will update you when it is ready. | Concise |
| Friend | I will message you when I finish it. | Casual |
| Project update | I will confirm once the task is complete. | Direct |
| Urgent task | I will let you know as soon as it is complete. | Prompt |
| Final review | I will follow up once everything is finalized. | Professional |
| Client deliverable | I will send the completed file once it is ready. | Clear |
How to Choose the Right Phrase
A few small wording choices can change how your message sounds. Before sending your message, consider the relationship, the level of formality, and whether you have a firm completion time.
- Consider your audience. Use formal language with clients or external contacts and simpler language with familiar coworkers.
- Name the task when useful. Saying I will update you once the report is complete is clearer than simply saying I will let you know.
- Avoid unnecessary promises. Do not say as soon as possible if you cannot realistically provide a quick update.
- Choose direct wording. Short sentences often work better than elaborate explanations.
- Match the communication channel. A quick chat message can be informal, while a client email may need a more polished phrase.
I Will Let You Know Once It Is Done vs I Will Update You Once It Is Complete
Both expressions communicate the same basic idea, but they have slightly different tones.
I will let you know once it is done sounds natural and conversational. It works well in everyday communication.
I will update you once it is complete sounds more professional and is particularly useful for workplace communication, projects, and client updates.
For example:
- Casual: I will let you know once it is done.
- Professional: I will update you once the task is complete.
- Formal: I will notify you upon completion.
The right choice depends more on context than grammar.
How to Make the Phrase Sound More Professional
You do not need complicated vocabulary to make this sentence professional. Focus on clarity and specificity.
Instead of:
I will let you know once it is done.
Try:
I will provide an update once the report is complete.
The second version identifies what will be completed and makes the message feel more appropriate for business communication.
You can also replace vague words with the actual task:
- I will update you once the revisions are complete.
- I will confirm once the document is ready.
- I will follow up once the review is finished.
- I will notify you when the requested changes are complete.
Common Mistakes to Avoid
The phrase itself is not incorrect, but certain alternatives can create confusion or sound unnatural.
- Do not overuse very formal language. Notify you upon completion may sound unnecessarily stiff in a casual chat.
- Do not promise an exact time unless you can meet it. A specific deadline creates a stronger expectation.
- Do not use as soon as possible without meaning it. It can sound vague when the recipient needs a clear update.
- Do not repeat the same phrase in every email. Rotate natural alternatives based on context.
- Do not make the sentence unnecessarily long. The purpose is simply to tell the reader when they can expect an update.
- Do not confuse completion with readiness. Something can be finished internally but still require review before it is ready to send.
How to Pair the Phrase With a Clear Deadline
If the recipient needs certainty, adding a realistic timeframe can make your message more useful.
Instead of:
I will let you know once it is done.
You could say:
- I will update you once it is complete, which I expect to be tomorrow.
- I will follow up when the report is ready, likely by Friday.
- I will confirm once the revisions are complete. I expect to have them finished this afternoon.
- I will send you an update after the final review is complete.
Only provide a timeframe when you have enough information to make a reasonable estimate.
Conclusion
There are many natural alternatives to I will let you know once it is done, and the best choice depends on your audience and situation. For professional communication, I will provide an update once the work is complete is clear and polished. For casual conversations, I will let you know when I finish it sounds more relaxed.
When possible, name the task, avoid vague promises, and choose a tone that matches the relationship. A short, specific sentence often communicates more effectively than a complicated one.
Frequently Asked Questions
What is a professional way to say I will let you know once it is done?
A professional alternative is I will provide an update once the work is complete. Other good choices include I will notify you once the task is completed and I will follow up once everything is finalized.
What is a shorter way to say I will let you know once it is done?
You can simply say I will update you when it is ready or I will let you know when it is finished. In a workplace chat, I will keep you posted can also work when the context is already clear.
Is I will let you know once it is done professional?
Yes. The phrase is grammatically correct and appropriate for many professional situations. However, I will update you once it is complete can sound slightly more polished in formal emails, project updates, and client communication.
What can I say instead of I will let you know in an email?
You can use I will update you, I will keep you informed, I will notify you, I will follow up, or I will get back to you. Choose based on how formal the email needs to sound and whether you are promising an update, confirmation, or response.
How do I tell a client I will update them when the work is finished?
A clear client-friendly option is I will provide an update once the work is complete. If the client expects a deliverable, you could say I will send the completed file once it is ready.
What is a casual way to say I will let you know once it is done?
For casual conversations, try I will let you know when I finish it, I will message you when it is ready, or I will keep you posted. These expressions sound natural without being overly formal.
What is the difference between I will let you know and I will update you?
I will let you know is broad and conversational. I will update you usually suggests that the other person is waiting for progress or new information. In project and workplace communication, update often sounds more specific.
Can I say I will notify you once it is complete?
Yes. I will notify you once it is complete is grammatically correct and professional. It has a more formal tone than I will let you know when it is done, so it fits better in business or official communication.
How can I make the sentence more specific?
Mention the actual task or deliverable. Instead of I will let you know once it is done, say I will update you once the report is complete or I will confirm when the revised document is ready. Specific wording reduces ambiguity.
What should I say if I do not know when the task will be finished?
Use a phrase that does not create an unrealistic deadline, such as I will keep you updated and let you know when it is complete. If possible, provide an estimated timeframe separately once you have enough information to do so.