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100 Subject Lines for Thank You Emails That Get Opened

For such a small gesture, sending thank you emails is a great way to build up brand loyalty and keep your customers engaged and constantly coming back. 

But this post isn’t about thank you emails and why they’re important. Check out our guide on thank you emails here for that. 

Instead, this post is about writing thank you email subject lines to get customers to open your email. 

And when it comes to getting customers to open your email, your subject line is incredibly important. 

Not only are subject lines one of the very few ways to stand out in customers’ inboxes, but a third of your email list base their decision whether to open your email or not entirely on its subject line.

That’s why we’ve put together this list of 100 great subject lines for thank you emails top brands have used in the past. So feel free to use them as inspiration in your own email marketing. 

General thank you email subject lines

Whether you’re thanking customers for their most recent purchase, for signing up to your email list or just simply thanking them in general, these are general subject line examples you can easily adapt.

  • A note from our founders – Fitbit
  • Big News and Bigger Thanks. – MindBody
  • Following up to say thank you – American Museum of Natural History
  • From the bottom of our hearts. And dog bowls. – Bark
  • From The Bottom of Our Hearts… – American Heart Association
  • Not A Marketing Email – Brooklinen
  • Thank You for an Amazing Year – Tinker Watches
  • Thank you for being in the fight for true freedom with us. – NextGen America
  • Thank You for Registering at Our Store – Vermont Country Store
  • Thank you for subscribing to Diggin’ in the Dirt Newsletter – Garden Crossings
  • Thank you for Supporting Independent Retailers! – Original Parts Group
  • Thank You, Thank You, Thank You! – Thorntons (UK)
  • THANK YOU! We’re almost SOLD OUT! – Fashion to Figure
  • Thanks for a super fly 2019! – Flywheel
  • Thanks for connecting with us! – United Way Massachusetts Bay
  • Thanks for having great taste – Alex Mill
  • Thanks for helping us – Revolution Tea
  • Thanks for your purchase! – Ales Nesetril
  • The most delicious thank-you – Betty’s Cafe Tea Rooms
  • WE Appreciate YOU weekend starts NOW! – Blue Steel
  • We Appreciate You! Free Shipping & Double Points + Totes with Pockets – Sea Bags
  • We think you’re 1 in 10 million. Here’s some free Trello Gold. – Trello
  • We’re so grateful for you we’re saying thank you twice! – Trusted Health Products
  • We’re Showing Our Appreciation — For You! – Betabrand
  • With Gratitude – Artifact Uprising
  • You showed up in a big way – Patagonia
  • You’re confirmed – thank you for signing up – Williams Sonoma
  • You’re one in a million – TransferWise
  • You’re the best! – David’s Tea

Subject lines with emojis

Adding an emoji to your subject line is a great way to make it stand out in people’s inboxes and get your emails opened. Just like the examples below have done. 

  • We’d like to thank you ➡️ Verified offer inside – Baseball Monkey
  • 😊 We’d like to thank you with this… – Better Homes and Gardens
  • 🔔 Open quick, we want to thank you! – Choice Home Warranty
  • 😊 Showing Our Appreciation: Save Up To 90% OFF – Daily Sale
  • 😊 (Approved) We’d like to thank you with a limited-time deal – Family Circle
  • 📧Just a little something to say thank you! (See What’s Inside) – Fine Stationery
  • 😊 Because we appreciate you, use this promo code! – Fragrance X
  • Thank you! ☀️ – Fragrant Jewels
  • 🎁 A gift to show our appreciation: 6 free cigars – JR Cigars
  • From the bottom of our hearts, thank you 💌 – Laura Canada
  • 💚 Exclusive Deal To Show Our Appreciation! – PRO Compression
  • 👉 Consider it a thank you | Save Up to 20% today – RST Brands
  • We can’t thank you enough 🌟 Up to 20% off is inside – RST Brands
  • 😊 You’re the best — up to 35% off! THANK YOU for shopping at Sears 😊 – Sears
  • We appreciate you 💓 – Simply Soles
  • Free Thank You Gift Open Now 🎁 – SOS Children’s Villages
  • THANK YOU FOR CELEBRATING PRIDE! 🌈 – SPLITS 59
  • From the Bottom of our Hearts ❤️ – Sugar Paper
  • Let us thank you ➡️  {NAME}, this coupon is yours thru tomorrow – Swanson Health Products
  • A BIG thank you ✨💖 – Tatty Devine
  • Thank you friend 😃 – The Cereal School
  • This is how we say thank you! 🙌 – VENUS Swim & Fashion
  • 😁 Allow Us To Show Our Appreciation | Enjoy This Deal Today – Woman Within
  • Thank You! ❤️ – You Shop Outlet
  • 👶 Thank you for caring! – Yumi

Check out our guide on using emojis in subject lines here for more emoji usage tips and best practices.

Thank You Day subject lines

What better occasion to thank your customers than on Thank You Day celebrated around the world every January 11th. 

  • Thank You Day is just around the corner… – Marks and Spencer (UK)
  • Celebrating Thank You Day – The Royal Mint (UK)
  • It’s Thank You Day! – Whittard of Chelsea

Personalized subject lines

Personalizing your subject line with your customer’s name is a great way to make it stand out and boost your open rate. 

So much so that subject lines that include the subscriber’s name achieve a 17% higher open rate on average

  • {NAME} – thank you. – American Red Cross
  • Thank you for all your support, {NAME} – Asthma UK
  • Thank You for Your Recent Purchase, {NAME}! – Bealls Florida
  • Thank you for being a member, {NAME} – Bobbi Brown Cosmetics
  • Thank you, {NAME}  – Fun and Function
  • We’d like to personally thank you ✰ {NAME}, you’ve got quite the offer inside – JR Cigars
  • Welcome, {NAME}. Thank You for Joining Us. – RH
  • Thank you, {NAME}! Up To 80% OFF is our treat – Spicy Lingerie
  • Thank you for joining our newsletter, {NAME} – Sunglass Hut
  • {NAME}, we can’t thank you enough! – Walter Drake
  • {NAME}, We Appreciate You – Willow Lane Cabinetry

Short & sweet subject lines

The length of your subject line strongly correlates with open rates.

A Litmus study found that the shorter your subject line, the more opens your email tends to get. In fact, having between 4 and 15 characters achieves the highest open rates whereas having over 50 characters saw the worst number of opens.

So in the spirit of keeping things short and sweet, here are some examples of short subject lines. 

  • A Special Thank You – Breo Box
  • Thank you berry much – Bubs Warehouse International (AU)
  • Thank You for Signing Up – Burberry
  • Thank you for your loyalty – Easylife
  • To Show Our Appreciation – English Gardens
  • Thank You For Caring – Food For The Poor
  • Thank you for your business – Harbor Freight
  • Thank You and Welcome – Homethreads
  • A great big THANK YOU – Lakeland (UK)
  • Friend, thank you – MAP International
  • We Appreciate YOU! – Olympia Sports
  • We’re Saying Thank You – Supplement Spot
  • A HUGE thank you – The Body Shop UK
  • Thank you for your support! – Z Chocolate

Examples mentioning a sale or special offer

Nothing says thank you to your customers like a special offer. If you’re including one in your email campaign, you should definitely mention it in your subject line like in the examples below.

  • Our treat: Up to 75% off as a thank you – Banana Republic Factory
  • THANK YOU! Customer Appreciation Sale Starts Today – CPAP
  • We Appreciate You – Take 15% Off Your Purchase – Delphi Glass Corp.
  • Thank You from Us | £10 Off Now – Farmison & Co
  • It’s official —> We wanted to thank you with code PERK – Gap
  • These DEALS are our way of saying thanks! – Gap
  • We’d like to thank you with an extra 40% off SALE! – Gap
  • Thank You for Visiting. Enjoy 15% Off. – Guess
  • official invite: here’s up to 75% off everything to show our appreciation – Kate Spade
  • $2.99 shipping to show our appreciation – Lillian Vernon
  • Enjoy This Thank You Offer – Miles Kimball
  • A thank-you is waiting for you: £15 off + free P&P now – Peter Hahn UK
  • 20% off everything to say thank you – Saje Natural Wellness

If you’re going to offer free shipping, be sure to check out our collection of subject lines mentioning free shipping here as well.

The rest of your email campaign

While your thank you emails will never live up to their full potential without a great subject line that gets them opened and read, you don’t want to neglect the contents of your email campaign either. 

That’s why we’ve also got a collection of thank you emails for inspiration you should check out.

For more tips on writing subject lines, our guide on subject line best practices is also well worth visiting. 

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