Why a thank-you letter?
Gratitude that gets remembered.
Client letters as polished as your work, sent from your phone. A thank-you on firm letterhead after the engagement, the referral or busy season. From $3.
People love real mail.
Not a hunch. Here’s what the research says.
60% of Americans say a card or letter in the mail means more to them than an email, according to a 2020 U.S. Postal Service survey.
U.S. Postal Service, 2020 [1]
Advertising mail from a business people already know gets read 64% of the time, according to the U.S. Postal Service’s 2025 Household Mail Survey. A thank-you letter is more personal still.
U.S. Postal Service, 2026 [2]
The average U.S. household gets fewer than 20 personal letters or cards a year (19.5 in 2025), according to the U.S. Postal Service’s 2025 Household Mail Survey. Yours stands out.
U.S. Postal Service, 2026 [2]
And they act on it.
For the letters that matter, paper still gets to the person.
63% of U.S. consumers say they’re more likely to act on an urgent letter than an urgent email, according to a 2025 study by Quadient.
Quadient, 2025 [3]
About one in eight marketing emails never reaches the inbox, according to Validity’s 2026 Email Deliverability Benchmark Report (87.2% inbox placement in 2025).
Validity, 2026 [4]
People who write thank-you letters underestimate how surprised and happy the recipient will be, and overestimate how awkward it will feel, according to research by Amit Kumar and Nicholas Epley in Psychological Science.
Kumar and Epley, 2018 [5]
Thank them the way you’d want to be thanked.
Tax season ends, the coffee runs out, and every client gets a real thank-you on firm letterhead before anyone takes a day off. The referral source who sent you three new clients? They get a letter too.
Write it once on your phone, add your logo and up to three footer lines, and we print it and mail it for you. Rules on client communication vary by profession and state, so check yours.
Letters firms send.
The referral thank-you
For the client or colleague who sent someone your way.
The post-engagement thank-you
When the matter closes or the return is filed.
The client anniversary
Five years together deserves a letter.
The year-end letter
After busy season, to everyone who trusted you with it.
The welcome letter
For a new client, before the first meeting.
The whole client list
One letter, every client, each copy personal: $3 a letter, $2.50 from 10 and $2 from 50.
Good to know.
Do clients notice a thank-you letter?
More than the sender expects: people who write thank-you letters underestimate how surprised and happy the recipient will be, according to research by Amit Kumar and Nicholas Epley in Psychological Science.
Should important client notices go by mail or email?
Routine updates can go by email. For notices that must be seen, mail them, and send them Certified when you need proof: 63% of U.S. consumers say they’re more likely to act on an urgent letter than an urgent email, according to a 2025 study by Quadient.
Can I use firm letterhead?
Yes. Add your logo at the top and up to three footer lines (name, title, firm, phone) at no extra cost.
How much does a thank-you letter cost?
From $3: $3 folded and mailed First-Class, $11 Certified with a tracking number, or from $15 mailed flat in a rigid mailer with a free tracking number. Mailing your whole client list? Mail merge is $3 a letter, $2.50 from 10 and $2 from 50.
Your turn.
Thank your next client on paper.
Write a thank-you letter from $3From $3 a letter plus sales tax where it applies: $3 First-Class, $11 Certified, from $15 flat with tracking. Paper and postage are included.
Sources
Every number on this page comes from the source named next to it. We checked each one against the publisher on October 20, 2026.
- U.S. Postal Service, “Mail Helps Americans Feel Connected During COVID-19,” survey of 1,000+ U.S. adults, April 15 to 17, 2020. about.usps.com
- U.S. Postal Service, “The Household Mail Survey: Mail Use & Attitudes 2025” (formerly the Household Diary Study), released March 2026, Table 3.3 and Table E.5. about.usps.com
- Quadient with Opinium, “Letters vs. Emails” consumer research, February 2025 (fieldwork August to September 2024), public summary. Vendor-sponsored: Quadient sells mail equipment. www.quadient.com
- Validity, “2026 Email Deliverability Benchmark Report,” March 2026 (2025 data), p. 7. www.validity.com
- Amit Kumar and Nicholas Epley, “Undervaluing Gratitude: Expressers Misunderstand the Consequences of Showing Appreciation,” Psychological Science 29(9), 2018. pubmed.ncbi.nlm.nih.gov