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Client Anniversary Messages to Mark Years Together

By Shawn Gregoire, founder of Capstone Outreach · Updated October 2026

Send a short, personal note on the day you started working together. Thank the client by name and name one thing you did together. That one detail is the key. It proves you remember the work, not just the bill. Keep it about them and skip the pitch. Use email for most clients, or text for those you already message.

Most client contact happens when something needs doing: a renewal, a problem, a deadline. An anniversary note is one of the few times you can reach out with nothing to ask. That makes it stick. It tells the client you see a person, not an account. It also gives them an easy reason to reply.

What makes it land is detail. 'Happy anniversary, thanks for your business' could go to anyone. Name the launch you got through together. Or name the deal that almost fell apart, or how their team has grown. That shows you were paying attention. Two or three lines with one real detail beat a polished paragraph.

On this page
  1. 11 examples to copy
  2. When to send it
  3. Subject lines
  4. What to avoid
  5. After you send it
  6. Frequently asked questions
  7. Related messages

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11 examples to copy

One message is easy. Hundreds of people, all year, is the hard part. Capstone Outreach puts everyone you know on a rhythm you pick, from weekly to every three months. When someone is due, a message like these is already written in your voice from your history with them. You approve it, and it goes from your own email or phone. See how it works.

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Everyone on a rhythm. Who is due, and when. Recorded in the app on a demo account.

1. First-year anniversary with a new client (email)

Subject: One year working together

Hi [Name], A year ago today we started working together, and I wanted to say thank you. I still remember our first call about [specific detail], and it's been good to see how far [Company] has come since then. Thanks for trusting me with this, especially early on when we were still learning how each other works. I'm looking forward to year two. Best, [Your name]

Why it works: In year one, a client is still deciding if hiring you was a good call. Recalling your first talk tells them it was.

2. Quick text to a client you already message regularly

Hi [Name], realized today marks [number] years since we started working together. Thanks for being such a great client. Still smiling about [specific detail]. Here's to the next one!

Why it works: It uses the channel you already share, so it feels natural. The shared memory makes it personal in under 200 characters.

3. Multi-year anniversary built around a shared win (email)

Subject: [Number] years, and [specific project] still stands out

Hi [Name], Today marks [number] years since [Company] and I started working together. When I think back, [specific project or moment] is what comes to mind first. It was a tough stretch, and the way your team handled it made the result possible. I don't say it often enough: you make this work enjoyable. Thank you for [number] years of trust and good conversations. Warmly, [Your name]

Why it works: Giving the client credit for a hard stretch you shared shows the bond has real history, not just billed hours.

4. After a long quiet stretch, no ask (email)

Subject: Thinking of you on our anniversary

Hi [Name], It's been a while since we last talked, but I noticed today is [number] years since we first worked together on [specific detail]. I wanted to say thanks. That project still comes up when people ask me about the work I'm proudest of. No agenda here. I hope things at [Company] are going well, and if you're ever up for a coffee, I'd enjoy hearing what you're working on. All the best, [Your name]

Why it works: The date gives you an easy, no-pressure reason to reach out. Saying 'no agenda' makes it easy for a lapsed client to reply.

5. Milestone year (5 or 10) from the business owner (email)

Subject: Ten years with [Company]

Dear [Name], Ten years ago this month, [Company] became one of our clients. A lot has changed since then: [specific change, e.g., your team has doubled and you opened the Denver office], and we've been glad to be part of it. On behalf of everyone here, thank you for your loyalty and for the honest feedback that has made us better at what we do. A small token of our thanks is on its way to your office. With gratitude, [Your name] [Title]

Why it works: A note from the top, tied to how the client's business has grown, shows your whole firm values a long bond.

6. Reflect and look ahead, for a client who likes ideas (email)

Subject: Two years in, thank you

Hi [Name], Two years ago today we kicked things off. Looking back, I'm proud of [specific result], and I've learned a lot from how you run [Company]. No action needed on your end, but I've been thinking about [goal they mentioned] and would enjoy talking it through whenever the timing suits you. For today, I mainly wanted to say thank you. It's been a genuinely good partnership. Best, [Your name]

Why it works: Clients who want a partner with ideas will like a look ahead. Keeping it optional stops the note from turning into a pitch.

7. Home purchase anniversary from a real estate agent (text)

Happy home anniversary, [Name]! One year ago today you got the keys to [street name]. Hope the place is treating you well and [specific detail, e.g., the garden came in]. Thanks again for letting me be part of it.

Why it works: Recalling the address and a personal detail keeps you top of mind for referrals without one word about selling.

8. Light and funny, for a client with a sense of humor (email)

Subject: Happy anniversary (no, not that kind)

Hi [Name], Three years ago today you signed on, and somehow you haven't fired me yet. I'll take that as a win. Jokes aside, thank you. Between [specific inside reference, e.g., the 11 p.m. launch call] and [another detail], it's been one of my favorite working relationships. Here's to many more projects, ideally with fewer late nights. Cheers, [Your name]

Why it works: Humor built on a real shared moment feels like a friend writing. The sincere middle line keeps it from reading as a throwaway.

9. Your company's anniversary, thanking clients (email)

Subject: We turn [number] today, and you're a big reason why

Hi [Name], Today [Your company] turns [number]. When we started, we had [specific humble beginning, e.g., one desk and three clients]. We would not be here without clients like you who took a chance on us and kept coming back. Thank you for your trust, your referrals and your patience while we grew. We don't take any of it for granted. With thanks, [Your name]

Why it works: Turning your own milestone into a thank you puts the client at the center of your story. That is the opposite of bragging.

10. Busy executive, 'no reply needed' (text or LinkedIn message)

[Name], today is [number] years since we started working together. Thank you for the trust and for [specific detail]. No reply needed, just wanted you to know it's appreciated.

Why it works: Telling a busy person they don't owe you a reply is a small kindness. It often earns a warmer reply than a longer note would.

11. Handwritten card for a milestone year (card)

[Name], Five years ago we shook hands on [specific detail]. Thank you for every project since. Working with you has been one of the best parts of my job. Here's to the next five. [Your name]

Why it works: A handwritten card stands out because it takes effort. A few short lines are all it needs to feel personal.

Sending these to more than a few people? See how people keep track of who to follow up with, and when: what a personal CRM does and the best personal CRMs, compared.

When to send it

Subject lines

What to avoid

After you send it

If they reply, answer within a day and keep it light. If they suggest a call or coffee, book it that week. If there's no reply, don't follow up on the note itself, since it didn't ask for anything. Instead, reach out in the next four to six weeks with something useful. Try an article, an introduction or a quick question about their goals. After that, aim for a real touchpoint every one to three months. Set a reminder for next year's date now.

Building the habit: how to keep in touch with contacts and what a personal CRM does.

Can you recall how the work began? Capstone keeps each client's timeline, from the first email to the last call. Before you write, you can see where you started and what you have done together.

Start 14 days free, then $25/mo

A study of 20 million LinkedIn members found that acquaintances, more than close friends, led to new jobs (Science, 2022). Capstone keeps those people warm. You approve every message, and it goes from your own email or phone.

Frequently asked questions

How to say Happy Anniversary professionally?

Say it plainly and tie it to the work: 'Happy anniversary, [Name]. Today marks two years since we started working together on [project]. I'm grateful for your trust.' Use the client's name, the number of years and one real detail. Skip romantic wording and piles of exclamation points. Close with a thank you, not a request.

Should I send a client anniversary message by email, text or card?

Use the channel you already use with that client. Email fits most work relationships. Text works for clients you message often. A handwritten card is best for milestone years like five or ten. It also suits your most important clients, since the effort shows how much you value them. You can also pair a card with a short email on the day.

What do I write in a 1 year anniversary message to a client?

Thank them for trusting you in the first year. Mention something from the start, like your first meeting or first project. A new client is still deciding if they chose well, so remind them of a real result. Keep it to three or four sentences. End by saying you look forward to year two.

Is it okay to mention business in an anniversary message?

Mention past work, not future sales. Naming a project you finished together is what makes the note personal. Asking for a renewal, a referral or a meeting about a new service makes it feel like a sales email in disguise. If you have an idea, keep it optional. Save the real talk for a separate message.

What if I missed the client's anniversary date?

Send it anyway if you're within about two weeks. Mention it lightly: 'I realized last week marked three years since we started working together.' Don't over-apologize. If more than a month has passed, wait for next year or find another reason to reach out. Add the date to your calendar so it doesn't slip again.

Should I send a gift with a client anniversary message?

Only for milestone years or your closest clients, and keep it modest. A note alone is enough for most years. If you send a gift, pick something tied to the client's tastes or your shared work. Check any gift policy their company has. Let the handwritten note carry the meaning, not the gift's price.

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