I want to thank you, in writing, for the way you led the year-end close.When two people were off sick in December, you reorganised the timetable, took on the supplier reconciliations yourself and still kept every deadline.Because of you, the board received the accounts three days early, for the first time in five years. It showed exactly the calm leadership I hope to see more of from you.I’ve shared this letter with our director, and I’m looking forward to talking about your next step in January.
With thanks, · Maria Lopez, Finance Manager How to write an appreciation letter to an employee → The impact sentence
The heart of every appreciation letter is one sentence with three parts: what the person did, what it changed, and what it says about them. The colours below mark each part.
What they didWhat it changedWhat it says about them
To an employeeYou reorganised the December timetable when two people were off, so the board received the accounts three days early; it showed real, calm leadership.
To a colleagueYou stayed on the call to walk the new client through our tools, and they signed the renewal the next morning; that patience is rare.
To a volunteerYou drove 30 food parcels across town in the snow, so every family on our list ate well over the holidays; your kindness held the project together.
To a supplierYou rushed the replacement parts overnight, which kept our production line running for 400 orders; it’s why we trust you completely.
Four letters, four relationships
The structure stays the same: thanks, the specific contribution, its impact, and a look ahead. The register (how formal the wording is) shifts with the relationship.
When to send, and in what form
| Occasion | Send within | Best form | Copy to |
|---|---|---|---|
| After a job interview | 24 hours | Email; a posted letter as well for formal sectors | Each interviewer separately |
| A project success | 2 to 3 days | Letter or card from the manager | The person’s manager or director |
| A work anniversary | On the day | Printed letter or card | HR, for their file |
| A client milestone | Within the week | Signed letter on company paper | Your client’s senior contact |
| A mentor’s help | When you have news to share | Handwritten note or personal email | No one; keep it personal |
| A retirement | Before the last day | Letter, often signed by the team | The whole team, if they agree |
Copying someone’s manager (sending them a copy) turns private thanks into public recognition. Ask first if you are unsure the person would welcome it.
Thanking your own manager
Writing to your own line manager is the one case where the impact sentence changes. Keep the first two parts (what they did, what it changed) and drop the third (what it says about them): praise of your manager’s character reads as flattery. If you want the thanks to be seen more widely, copy their manager, with one line saying why.
Sounds like flatteryYou are an inspiring leader and the best manager I have had.
Sounds sincereThank you for letting me present the results to the board. Preparing for it taught me more than any training course.
Cc: Head of Operations, “copying Maria, as I wanted her to know how much this helped.”
Cc: Head of Operations, “copying Maria, as I wanted her to know how much this helped.”
Openings and closings that sound sincere
| Part | Phrase |
|---|---|
| Opening | I wanted to thank you properly for… |
| Opening | I’ve been meaning to write since… |
| Impact | Because of your help, we were able to… |
| Impact | It made a real difference to… |
| Closing | I’m grateful to work with you. |
| Closing | I look forward to working together on… |
For more complete letters, see appreciation letters for every occasion.
Guides on appreciation letters
3 guides · newest first
How to Write an Appreciation Letter to an EmployeeFour-paragraph structure, timing guidance, and five full appreciation letter examples that make employees feel genuinely seen by their manager.Apr 23, 2026 · 15 min read
Professional Appreciation Letter Examples for OccasionsProfessional appreciation letter templates for every workplace occasion. 10 expert examples for employees, clients, vendors, mentors, volunteers, and more.Apr 4, 2026 · 22 min read
Thank You Letter After Interview: Templates to ImpressThank you letter templates for after job interviews. 10 expert examples for first, second, panel, phone, video, and executive interviews with timing and format advice.Apr 3, 2026 · 23 min read