How to Write the Perfect Donor Thank-You Letter: A Guide

Acquiring new donors is one of the greatest expenses in fundraising. It costs 10 times as much to acquire a new donor as it does to communicate with an existing one, yet few nonprofits even have a new donor welcome program.

It shows in our sector’s abysmal attrition of new donors.

According to the Fundraising Effectiveness Report, only 18.9% of new donors will give again after their first gift. However, once that donor makes a second gift, 59.3% will give again.

How do we get that second gift? Two words: thank them!

But how? What should you say? What goes into a winning donor thank-you letter? Are there things you can say that will make them give again?

Why donor thank-you letters matter

Acknowledgment letters play a critical role in fundraising by transforming an isolated financial transaction into a lasting partnership. By taking the time to express genuine gratitude, nonprofits can lay the groundwork for long-term supporter engagement, offering the following benefits:

Improved donor relationships

Every time they donate, your donors put their faith and trust in your organization. It’s important to cultivate these donor relationships to keep them thriving. Saying thanks is one of the easiest ways to reach out to your supporters and make them feel appreciated.

When you acknowledge their contributions, donors feel closer to your organization, and you’ll establish deeper relationships with them. Donor thank-you letters also help develop open communication with your supporters to send updates and information on future campaigns.

Increased donor retention

Thanking donors for their contributions is one of the most effective retention strategies. In fact, studies have suggested that sending personalized thank-yous can increase donor retention rates by up to 39%!

When supporters feel their contributions are making a difference and being recognized, they’ll feel appreciated and more likely to give again.

Enhanced public image

Your nonprofit works hard to accomplish great things in your community. Donor thank-you letters show your supporters that you care about them just as much as they care about you and your work.

When you send a heartfelt thank-you, your supporters will be more likely to talk about how appreciated your organization made them feel and spread the word about the work you do. You can also use social media posts to publicly show your love for your donors through general gratitude messages and specific donor shout-outs.

Types of donor appreciation letters

Donor appreciation letters come in different forms and are sent for various reasons. Here is an overview of the types of gifts that require unique acknowledgments: 

• Online donations via your online donation form
• Mail-in donations
• Pledges
• Recurring gifts
• Matching gifts
• Planned gifts
• Major gifts
• Gifts of stock
• In-kind gifts
• Corporate sponsorships

Choosing a format

You have multiple options for the format of your appreciation letters. Consider the following common structures and the pros and cons of each to choose the right format for your nonprofit: 

• Printed letters. Printed letters sent through direct mail are a classic way to contact and acknowledge your donors. They allow you to standardize your communications and send messages out quickly.
  
  • Pros: They’re convenient to create and send.
  • Cons: Typed letters are slightly less personal than handwritten letters.
• Handwritten letters. Handwritten letters offer a personal touch, letting donors know you’re thinking about them. This strategy is especially effective for major donor gratitude messages because it shows these supporters that you recognize their monumental impact on your mission.
  
  • Pros: They create a unique, personalized donor touchpoint.
  • Cons: Handwritten letters take a little more time, effort, and money and may not be feasible for large organizations with many donors.
• Emails. Email is one of the most common ways to send donor thank-you letters because you can automatically send them right after donors give, ensuring that your thank-you letters don’t fall through the cracks.
  
  • Pros: Emails are quick, easy, and cheap for your nonprofit to send.
  • Cons: Donors may feel overlooked if your emails aren’t personalized to each recipient.
• eCards. eCards are electronic greeting cards that your nonprofit can use to show appreciation. They include a short message and an image related to your mission.
  
  • Pros: eCards tend to be more visually engaging than long emails with lots of text, and their shorter format makes them more attention-grabbing.
  • Cons: eCards may not provide the space you need to fully explain the impact of donors’ gifts.

The appreciation letter format you choose will ultimately depend on your nonprofit’s budget and your audience’s communication preferences. Remember that you can use multiple formats to thank donors more than once. In fact, we recommend this approach to drive home your point more effectively. A handful of different appreciation messages allows you to keep donors informed about their impact and stay on their radars.

The anatomy of a perfect donor thank-you letter

A well-structured appreciation letter balances legal requirements with emotional storytelling to create meaningful connections with supporters. By organizing your letters strategically, your nonprofit can ensure donors feel both deeply valued and properly informed. 

Use this template to get started:

Today’s Date

Name of Recipient

Address

City, St., ZIP

Dear Name of Recipient,  

Dramatic opener [Start in the middle of the action, with a dramatic story, descriptive details, an unexpected narrator or donor-centered compliment.]

i.e. “You just did a great thing.”

i.e. “You are a rare kind of generous.”

i.e. “You have no idea how much your help has meant.

Short impact story [Talk about how their gift met the need with descriptive details that take me to the action. If possible, use a photo, ideally a close-up image with the subject looking at the camera, and share a story about one person/animal who was helped.]

i.e. “Your gift gives kids like Denzel hope. Denzel came to the Boys and Girls Club while his mom picked up extra shifts at the nursing home where she works as an RN. Unsure of what to do with her eight-year-old son while she worked, her neighbor suggested the Club.”

i.e.  “For Jenna, you are a lifeline. When she came to Lifeworks, she was a 17-year-old runaway fleeing her abusive boyfriend. Facing the holidays alone and pregnant, she had nowhere to turn.

Thanks to you, Jenna was welcomed into Lifeworks and found a haven in a cozy safe room of her own.

Because of your kindness, she got the therapy, medical care, and parenting classes she needed and delivered a happy, healthy baby boy.”

[Thank them] For responding so quickly and generously and share how their gift will be used.  

i.e. “Thanks to you Denzel is spending his summer learning new computer programming languages. He says wants to be a computer programmer when he grows up. With your help, he’ll be a great one!”

[Reflect on their kindness, compassion, loyalty, dedication, and/or big heart]

i.e. “Your kindness and compassion supporting Denzel says everything there is to know about your generous and caring heart.”

Include your tax ID #, gift amount, and date of the gift so it can serve as their tax receipt.

i.e. For your tax records, your $500 donation to Lifeworks was received on December 15, 2026.

[Next step] Share when they will hear from you next to offer a preview of next interaction,

i.e. You’ll hear updates from us in our monthly newsletter, but please call me at (888) 321-4321 if you’d like to stop by the shelter and meet Mr. Pickles or one of our other amazing dogs or cats, and see your donation at work!

i.e. You’ll meet more kids like Jenna that you are helping in our email newsletter. Please email me, June@lifeworks.org or call me at (512) 452-1746 if you’d like to chat or see your gifts at work.

[Closing] i.e. “Warmly,” or if possible, use a mission-infused closing i.e. “For the Love of Cats, For the Love of Music, For the Love of Film,”

[Signature] Ideally, this is live or printed, or if digital, is scanned

Typed Name

Title

Phone number

Email

[P.S.] *Always use the P.S.  It can reinforce the thanks, be a special exclusive invite, or just a reminder you are here for them whenever they have a question and to find your business card enclosed.

Always include your business card with the letter!

How to write a compelling donor thank-you letter 

Drafting an impactful acknowledgment letter requires a thoughtful blend of gratitude, transparency, and personal connection. The following strategies will help your nonprofit elevate its thank-you letters from standard financial receipts into inspiring messages that resonate with supporters.

1. Prioritize personalization. 

Your introduction and greeting are the first pieces of information your donors will see. Start strong with personalized content to ensure they read the whole message.

Use these strategies to personalize your greeting and your letter’s main content:

• Use supporters’ preferred names. Your donor thank-you letter should never start with an impersonal greeting like “Dear Donor” or “Dear Friend.” Instead, use your supporter’s preferred name. For example, if a donor’s name is William, but he goes by Bill, address him as Bill.
• Personalize your thank-yous with the type of donation the donor made. As mentioned, we recommend creating different thank-you letter templates for different gifts, such as online donations, pledge donations, fundraising event gifts, sponsorships, and tribute gifts. These unique touches show that your organization cares about donors’ unique contributions.
• Reference donors’ past involvement. Besides referring to previous donations, referring to other experiences you’ve shared with a supporter is another personal touch you can add to your acknowledgments. If they’ve volunteered for your organization, thank them for how helpful their assistance was. Or, if they’ve been to a fundraising event before, mention the event they’ve participated in and how you were honored by their attendance. This is also an excellent opportunity to mention any volunteer or event opportunities that are coming up for your nonprofit.

2. Communicate the specific impact of the gift.

A donor thank-you letter is the perfect medium for telling a story that will remind supporters why they gave in the first place. Incorporate the following types of content to convey donors’ impact:

• Personal success stories from people whom your organization has supported
• Updates on current projects
• Plans for future initiatives

These stories are great ways to connect with your supporters and show them how you’re using their contributions. Stories also shift the focus of the acknowledgment off of your organization and onto your donors and the people, animals, and/or communities you serve.

3. Give a timeline for your project.

Give donors an update on your campaign’s progress toward your fundraising goal. By reminding your supporters how close you are to your end goal, you can create a sense of urgency that inspires donors to give more without your organization specifically asking for another donation.

Consider including a fundraising thermometer in your thank-you letters to emphasize how close you are to the campaign goal.

4. Include a donation receipt.

Your donor thank-you letters can also double as tax receipts. Include pertinent tax information at the bottom of your thank-yous, including your organization’s name, federal tax ID number, and a statement proclaiming your organization as a registered 501(c)(3). Supporters use tax receipts to claim deductions on their tax returns, so as long as the required information is included somewhere in an email or letter, they can use it as proof of the donation.

5. Use donor-focused language.

A donor-centric acknowledgment helps encourage donors to give again in the future. Your organization couldn’t complete its mission without the generosity of all your supporters, so be sure to acknowledge your donors and highlight their contributions.

Instead of discussing your organization’s accomplishments, tell supporters how they’re helping your nonprofit achieve its goals.

Additionally, when communicating with supporters, address donors in the second person pronoun (“you”), and make sure you use “you” more than “we” and “I.” For example, you may say something like, “Thanks to your generosity, hundreds of students now have the supplies they need to start the school year strong.” Your donor thank-you letters should show your supporters that your organization appreciates them individually, not as part of a nameless, faceless group.

6. Incorporate a conversational tone.

Use a warm and personal tone in your donor thank-you letters to cultivate connection and make donors feel like they are part of your nonprofit’s family. Donors who feel a connection to your nonprofit will be more likely to donate again in the future.

Part of keeping a conversational tone in your acknowledgments means guaranteeing that your donors understand what you’re thanking them for. Avoid any complex jargon in your thank-you letters so supporters can understand your thanks without looking up the meaning of specific terms. Use broader phrases for more specialized aspects of your organization’s work.

7. Highlight additional ways donors can get involved with your mission.

Within your donor thank-you letters, don’t be afraid to tell your supporters about other ways they can engage with your organization. For example, you can encourage donors to:

• Volunteer
• Attend free events
• Explore corporate giving programs

Informing donors of how to stay in contact with your nonprofit helps retain your supporters. Offering other engagement opportunities encourages your donors to interact with your organization beyond the dollars they contribute, allowing them to be more closely connected to your work.

8. Provide contact information for someone at your organization.

Donors may have various questions, so provide the name, phone number, and email of a staff member whom supporters can contact at your organization.

By providing contact information, your nonprofit will seem more approachable to your supporters. Instead of being a faceless organization, you can show donors you want to hear from them by connecting them with a real person at your nonprofit.

9. Sign off the letter from a specific person associated with your organization.

Your donor thank-you letter should be signed by someone high up in your organization, like your executive director, a board member, or a department head. A signature from a significant leader establishes authority and legitimacy for your acknowledgment. It also makes donors feel appreciated on a more personal level.

10. Proofread your letter.

Once your donor thank-you letters are complete, check your writing for mistakes. Before you send out your letters, read and reread them with a detail-oriented eye. Run your letters through your spell check, and double-check any donor information to ensure everything is correct. In addition, have another person look over your letters before sending them because it’s easy to miss mistakes when you’ve been reading the same thing repeatedly.

7 ways to personalize your donor thank-you letter 

Tailoring appreciation messages to individual supporters prevents communications from feeling transactional or mass-produced. By implementing a few targeted adjustments, you can ensure each donor feels uniquely seen and valued for their specific contributions. 

1.  Use the donor's name.

It sounds simple, but one of the most powerful ways to personalize a thank-you letter is to address it to the donor by name. Avoid generic greetings like "Dear Donor" or "Dear Friend." Instead, use the donor's first name whenever possible.

If you're sending letters to longtime donors or major donors, consider adding an even more personal greeting that reflects your relationship with them.

2. Reference their specific gift.

Your thank-you letter should always reference the specific gift the donor made, including the amount and the date it was received. This confirms that the donation was received and shows the donor that their contribution was not just another transaction to your organization.

For example, instead of "Thank you for your donation," try "Thank you for your generous gift of $100 on July 15th to support our annual summer camp program."

3. Mention the impact of their gift.

Donors want to know that their gift is making a difference. Mention the specific impact of the donor's contribution in your letter. Even a single sentence that connects their gift to your mission can go a long way.

For example, "Your gift of $100 will help provide school supplies for five students at our after-school program this fall."

4. Tailor the letter to donor type.

Not all donors are the same, and your thank-you letters don't have to be either. Consider creating different thank you letter templates for different types of donors, such as:

• First-time donors. Focus on welcoming them and sharing what to expect as part of your community.
• Recurring donors. Acknowledge their ongoing commitment and share how their sustained support is making a difference.
• Major donors. Provide a more detailed impact report and consider a personalized handwritten note or phone call.
• Event donors. Reference the specific event and thank them for their participation.

5. Make it timely.

Send your thank-you letters as soon as possible after receiving a donation. The longer you wait, the less meaningful the letter will feel. Ideally, you should send a digital acknowledgment within 24 hours and a more formal letter within a week.

If you use a nonprofit CRM, you can set up automated thank-you emails that go out immediately after a donation is received, ensuring that every donor gets a timely acknowledgment, no matter how busy your team is.

6. Include a personal touch.

Go beyond the standard template by adding a personal touch to your thank-you letters. This could be a handwritten note from your executive director, a photo of your team at a recent event, or a story about someone your organization has helped recently.

Even a simple postscript (P.S.) at the bottom of the letter can make it feel more personal. For example, "P.S. We're hosting a volunteer appreciation day next month and would love to have you join us. Watch for an invitation in your inbox!"

7. Automate with your CRM.

Personalizing every thank-you letter manually is time-consuming and difficult to scale. That's where your nonprofit CRM comes in. A good CRM allows you to automate the process of sending personalized thank-you letters by pulling in donor-specific data like name, gift amount, and giving history.

With Bloomerang, you can set up automated email templates that pull in donor-specific data and send personalized thank-you letters automatically after every donation. This means you can maintain a personal touch at scale without adding work to your team's plate.

Personalizing your donor thank you letters doesn't have to be complicated or time-consuming. By implementing a few simple strategies and leveraging the right technology, you can make every donor feel genuinely appreciated and strengthen the relationships that power your mission.

Best practices for donor thank-you letters 

Grab donors’ attention immediately and creatively.

To capture your supporters’ attention, make your introduction compelling. Start with an introductory remark that draws your reader in and includes the specifics of your campaign.

Even though some information must be included in your donor thank-you letters, you have creative license throughout the acknowledgment. Donors don’t want to read a dry, cookie-cutter thank-you note, so don’t start with boring cliches like “On behalf of” or “Thank you for your generous contributions.” The more creative you can make your messages, the more likely you will capture your supporters’ attention and the more memorable you’ll be!

Segment your donor list.

Your donor base isn’t a faceless collective. Each person’s relationship with your organization warrants a personal approach. Segmenting your list helps you individualize your acknowledgments before you start writing. You’ll still have to personalize each template before sending them, but writing multiple drafts for various situations ensures your thank-you notes will always be relevant and specific.

Split your list of supporters into first-time donors, recurring donors, major gift donors, and any other significant groups. Write a thank-you letter template for each group based on their unique contributions to your organization. Although you want your templates to be situationally specific, don’t make them so specific that you can’t personalize them by simply filling in your supporters’ personal information.

Don’t immediately ask for another donation.

You wouldn’t give your friend a thank-you card to let them know how much you appreciate the birthday gift they got you that includes a list of presents you want for next year. Don’t do the same thing to your supporters! Remember, your donors want to feel appreciated.

While you want to encourage your supporters to further communicate with your nonprofit and donate multiple times, you don’t want them to feel that money is all your organization cares about. Your letter should be donor-centric and appreciative. Focus on the donor’s generosity and hold off on making any further asks.

Brand your acknowledgments.

Your thank-you letters should be cohesively branded to match your nonprofit’s branding. Ensure the letterhead and photos you use match the rest of your campaign or your organization’s overall look so that your supporters will have no doubt whose letter they’re reading.

Keep your donor thank-you letters short.

Your donor acknowledgments shouldn’t be multiple pages long. In fact, the shorter, the better! Keep your donor thank-you letters on one sheet of paper if you can. Donors don’t need to be overwhelmed with an envelope stuffed with information or an email that takes up their full screen.

When to send your donor thank-you letter 

Timing isn't just a matter of etiquette. It directly impacts donor retention. If a thank-you arrives too late, the donor's emotional connection to their gift has already faded, making them feel like an afterthought.

As a rule of thumb, you should aim to send your thank-you letter within 48 hours of receiving a donation.

Depending on your organization's size and resources, use the following processing windows to keep your stewardship on track:

• Online donations (Immediate): Set up an automated email receipt that triggers instantly. However, follow this up with a personalized, non-automated email or physical letter within 2 to 3 business days.
• Checks and mail-in gifts (Within 48–72 Hours): Process and mail physical letters within three days of the check clearing.
• Major or first-time gifts (Within 24 Hours): For high-impact donors or first-time donors, pick up the phone. A thank-you call within 24 hours, followed by a formal letter later that week, vastly increases the likelihood of a second gift.

IRS requirements for donation acknowledgment letters 

To serve as a valid tax receipt, your acknowledgment letter must include the following specific elements:

• Organization details: The official name of your nonprofit.
• Donation specifics: The exact amount of cash received or a detailed description of any non-cash property (note that you should never assign a dollar value to non-cash items, as valuing the property is the donor's responsibility).
• The "goods or services" statement: A clear declaration stating whether your organization provided any goods or services in exchange for the gift.

Short thank-you messages for donations

Sometimes, less is more. For quick email updates, text messages, post-donation landing pages, or social media shout-outs, a brief and punchy message keeps the donor engaged without overwhelming them.

Here are five brief templates you can adapt for your organization:

• For online landing pages: "Thank you! Your donation went through successfully. Because of your generosity, we can keep providing fresh meals to families in our community this week. Keep an eye on your inbox for a formal receipt!"
• For text messaging (SMS): "Hi [Name], thank you so much for your gift of $[Amount] to [Nonprofit Name] today! Your support keeps our clean water projects moving forward. View your receipt here: [Link]."
• For a quick email sign-off: "We are so grateful for your recent gift! Your belief in our mission means the world to our team, and more importantly, to the people we serve. We couldn't do this work without you."
• For a social media shout-out: "A huge shout-out to everyone who supported our winter drive today! Your donations are already being turned into warm coats for local shelters. You make this community great."
• For a swift postcard note: "Just a quick note to say how much we appreciate your support. Your recent donation is already hard at work funding our after-school programs. Thank you for being a vital part of our team!"

Even in a message under three sentences, always try to include three elements: the words “thank you,” a mention of the specific impact (e.g., meals, coats, programs), and a brief note on what happens next.

Frequently asked questions about donor thank-you letters

Do nonprofits need to thank donors who give through Facebook or Instagram?

Yes. While social media platforms provide automatic receipts, these are purely transactional. Reaching out with a direct message or comment to say thank you builds a meaningful connection. If you can obtain the donor's email through the platform's donation report, adding them to a standard welcome sequence helps move them into your community.

Should organizations send a thank-you letter for a recurring donor's monthly gift?

No, sending a full letter every single month can overwhelm donors and strain administrative resources. Instead, send an automated monthly transaction receipt. Then, you can replace repetitive monthly letters with a highly personalized, impact-focused thank-you letter twice a year, alongside a comprehensive annual tax summary every January.

Can a thank-you letter include a soft call to action like asking donors to follow social media channels?

Yes, as long as you’re not asking for money. While a secondary financial request should never be included in an acknowledgment, inviting a donor to follow social channels, subscribe to a newsletter, or read a recent blog post is an excellent way to deepen engagement and keep them connected to your mission.

How should a nonprofit acknowledge a donation given in memory or honor of someone?

Your nonprofit should send two distinct letters. First, a standard tax acknowledgment and thank-you letter goes to the actual donor, referencing the tribute name. Second, a separate, heartfelt card is sent to the honoree or the deceased person's family. This notification card shares that a gift was made, but it must omit the specific dollar amount.

Final thoughts

Donor thank-you letters are a crucial step for every fundraising campaign. People want to feel appreciated for the time and money they spend helping others. Acknowledging your donors is key to higher retention rates and increases the possibility of obtaining larger gifts in the future. Recognize your supporters as the heroes of your cause to help your organization’s fundraising efforts grow.

Looking for additional supporter stewardship and acknowledgment resources? Start here:

• Donor Stewardship: Key Tips to Build Relationships. Your appreciation letters are just one element of your large donor stewardship strategy. Use the expert tips in this guide to build well-rounded, long-lasting relationships.
• Donation Request Letter Templates to Help Raise More. Your organization should send donation requests regularly in addition to gratitude messages. Use these templates to structure your requests effectively and raise more.
• Email Marketing for Nonprofits: The Complete Guide. Email is a common way to not only send donor thank-you messages but also a variety of other key information that supporters need to know. Use this guide to perfect your email marketing strategy.

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