For a nonprofit, November mail is not really about holiday cards. It is about three dates arriving in the same few weeks: GivingTuesday on December 1, 2026, the December 31 end of the giving year, and the USPS holiday rush that fills every mailbox in between. A year-end appeal mailed in mid-November reaches donors while they can still act on all three — read it, give on GivingTuesday, and finish before the year closes. An appeal mailed in mid-December competes with Christmas cards, gift boxes, and the December 17 recommended send-by date for domestic First-Class Mail, and it asks donors to decide in the busiest week of their year.
This guide covers the three mailings a nonprofit should plan for year-end, what belongs in the appeal envelope, the postage math for a real-sized list, and a backward schedule that gets the appeal out while donors still have room to respond.
Key Takeaways
- Mail the main appeal in mid-November, not December: donors need time to read it, respond on GivingTuesday, and give again before December 31.
- GivingTuesday 2026 falls on Tuesday, December 1 — the Tuesday after Thanksgiving. Treat it as a short reminder pointing at the same campaign, not as a second, competing appeal.
- The appeal belongs in a sealed letter, not on a postcard: it carries a personal ask, a reply slip, and a reply envelope, and nothing about a donor’s giving belongs in public view.
- At retail prices, 2,000 one-ounce appeal letters cost $1,640 in postage; a postcard reminder to the same list adds $1,300. Weigh a finished, stuffed sample before buying postage — a reply envelope and inserts can push a letter past 1 ounce.
- Mail the final deadline reminder by December 10. The USPS December 17 First-Class date is the backstop for Christmas delivery, not the plan for a December 31 gift.
- Thank every donor promptly, and remember that donors generally need a written acknowledgment from the charity for a single gift of $250 or more to claim a deduction — the January thank-you is a compliance step as well as good manners.
Why November Decides December
Year-end giving runs on three clocks that most other mailings do not have to satisfy at once. First, GivingTuesday — the global day of generosity held the Tuesday after Thanksgiving — falls on December 1 in 2026, and many donors now plan a gift specifically for that day. Second, December 31 is the end of the giving year: donors who give with the tax year in mind make their decisions in December, and a letter that arrives December 20 leaves almost no decision window. Third, the postal clock: USPS recommends December 17 as the send-by date for domestic First-Class Mail expected before December 25, with Priority Mail on December 18 and Priority Mail Express on December 19. A mailing planned around those three dates — appeal in mid-November, reminder before December 1, deadline reminder by December 10 — gives each date its own job instead of asking one December letter to do everything.
November also has a postal advantage worth using. A letter mailed in the second week of November arrives long before the holiday peak, when First-Class Mail still moves at its normal pace. A letter mailed December 15 arrives, if it arrives on time at all, in the same week as every holiday card in the country — and it asks the donor to act during the week they are least likely to sit down with mail.
The Three Mailings, and Why to Keep Them Separate
The most common mistake in nonprofit year-end mail is trying to do everything in one envelope: the appeal, the GivingTuesday announcement, the deadline warning, and the thank-you for last year’s gift, all fighting for the same two pages. Donors skim it and keep none of it. Split the work:
| Mailing | Who gets it | One job | Best format |
|---|---|---|---|
| Year-end appeal letter | Current donors, lapsed donors, and warm prospects | Make one clear ask with one deadline | Sealed letter with reply slip and reply envelope |
| GivingTuesday reminder | The same list, shortly before December 1 | Point donors to give on December 1 | Postcard or short letter — one message only |
| Deadline reminder | Donors who have not yet responded | Remind them the giving year ends December 31 | Short letter, mailed by December 10 |
| Thank-you | Everyone who gave | Thank them and confirm the gift | Letter, mailed promptly in January |
The appeal letter is the money mailing, so it deserves the sealed envelope and the full story. The GivingTuesday reminder is the nudge mailing: short, cheerful, and pointed at a single day. The deadline reminder is the urgency mailing — and it only works if it reaches donors who have not yet given, which means suppressing everyone who already responded. Mailing a deadline warning to someone who gave last week is the fastest way to teach a donor that your mail does not pay attention.
What Goes in the Appeal Envelope
An appeal envelope has four parts, and each one earns its place. The letter itself should tell one story about one person or one program the gift will help, make one ask, and name one deadline — December 31, or GivingTuesday for the early version. The reply slip lets the donor answer without composing anything: gift amounts to circle, a space for another amount, and a line for the donor’s name and address as it should appear on the acknowledgment. The reply envelope removes the last friction; a donor who has to find an envelope and a stamp is a donor who may put the letter aside. And the outer envelope should look like personal mail, not a flyer: a real return address, a First-Class stamp or indicia, and no teaser line that turns a charitable ask into advertising.
Weight is the detail that quietly changes the budget. A one-page letter in a standard envelope mails at the 1-ounce First-Class letter price, but a two-page letter plus a reply slip plus a reply envelope can tip past 1 ounce, and each additional ounce adds $0.29 per piece. Weigh one finished, stuffed sample — letter, slip, reply envelope, and all — before buying postage, and decide the paper and the enclosure count against that number, not against the empty envelope.
Letter or Postcard? The Decision That Sets Your Budget
Format is a postage decision first and a design decision second. Current USPS retail prices, verified for this guide, are:
| Format | Postage (retail, November 2026) | Best for | Watch out for |
|---|---|---|---|
| Standard 1-ounce letter | $0.82 (one Forever stamp) | The appeal itself, with reply device inside | Each additional ounce adds $0.29 |
| Standard postcard | $0.65 | GivingTuesday reminder, short nudges | Everything printed on it is visible in transit — never put a donor’s giving history on one |
| Square or rigid envelope | $0.82 + $0.49 nonmachinable surcharge | Almost never worth it for an appeal | The surcharge applies even at 1 ounce |
| Large envelope (flat) | From $1.69 | Oversized appeal packages with brochures | Costs more per piece; use only when the enclosure earns it |
For larger lists, ask a mail house or your postage provider for a written quote on presorted First-Class Mail or Marketing Mail before assuming retail is your only option. Our bulk-mailing guide ranks the options; the rule here is the same: never invent a per-piece price for a service you have not quoted. And remember that Marketing Mail moves more slowly than First-Class Mail, so a deadline-driven appeal in Marketing Mail needs to go out earlier than the dates in the schedule below.
The Postage Math: A Worked Example from Atlanta
Take an illustrative community food bank in Decatur, Georgia, mailing a year-end appeal to 2,000 households: the postage arithmetic at retail prices is:
| Piece | Quantity | Postage each | Postage total |
|---|---|---|---|
| Appeal letter (1 oz) | 2,000 | $0.82 | $1,640 |
| GivingTuesday reminder postcard | 2,000 | $0.65 | $1,300 |
| Two-touch total | 4,000 | — | $2,940 |
Two details change that total fast. First, weight: if the stuffed appeal letter tips to 2 ounces, the appeal run alone rises from $1,640 to $2,220 — 2,000 pieces times $1.11. Second, list quality: a 5 percent undeliverable rate on a 2,000-piece mailing wastes about $82 in postage on the appeal run alone, and loses 100 appeals that never reached a donor. Clean the list before printing: remove duplicates, drop donors who have asked not to receive mail, and run addresses through the address tools your mail house or postage software already offers.
Segmenting the list changes the math in a better direction. The top tier — say 150 longtime donors — can receive a hand-signed appeal letter mailed in-house at retail prices, while the remaining 1,850 identical printed pieces go through a mail house that may qualify for commercial pricing. That split keeps the personal touch where it matters most and the efficiency where volume lives. If the list grows past a few thousand, the mail-house quote, not the retail stamp, is the number to plan around.
A Backward Schedule for Year-End Appeal Mail
Work backward from the outcome you want — a gift received before the year ends — not from the day you happen to finish the letter:
| Mail by | Job | Why this date |
|---|---|---|
| November 6 | List frozen and segmented | Every later stage is arithmetic once the list stops moving |
| November 13 | Appeal letters in the mail | Arrives before Thanksgiving travel scatters attention |
| November 24 | GivingTuesday reminder postcards in the mail | Arrives just before December 1, while the day is still ahead |
| December 1 | GivingTuesday | The global day of giving — the reminder’s payoff day |
| December 10 | Deadline reminder letters in the mail (non-responders only) | Arrives with time to act before December 31, inside the USPS December 17 First-Class window |
| December 17 | USPS recommended send-by, domestic First-Class Mail | After this, on-time Christmas delivery is no longer the expectation — and a year-end gift letter mailed this late has almost no decision window |
| Early January | Thank-you letters in the mail | Prompt thanks, plus the written acknowledgment donors need for larger gifts |
Note what is missing from that schedule: a December appeal. By mid-December, donors are traveling, mailboxes are full, and an appeal reads as one more demand in the loudest week of the year. If a donor has not responded by early December, the deadline reminder — not a fresh appeal — is the right final touch.
Segmenting the List: Four Groups, Four Versions of the Ask
One appeal letter sent to everyone is a letter written to no one. Four segments cover most nonprofit lists, and each one deserves its own version of the ask:
- Loyal donors (gave this year): thank them first, report one concrete result of their giving, then ask them to renew or increase. They already believe in the mission; the letter’s job is to show the gift at work.
- Lapsed donors (gave before, not this year): acknowledge the gap honestly — “we miss you” beats pretending nothing changed — and give them one clear reason to return now, such as a matching gift or a year-end goal.
- New contacts (event attendees, volunteers, newsletter readers who never gave): introduce the mission before asking. A first gift ask should be smaller, simpler, and tied to one tangible outcome.
- Monthly donors: thank them and do not send them the same appeal as everyone else. If you ask monthly donors for anything extra, make it a distinct invitation — for example, a one-time year-end gift on top of their monthly support — and say plainly that their monthly giving already counts.
Suppression matters as much as segmentation: once a donor responds to the appeal, remove them from the deadline reminder. A donor who gave on GivingTuesday and then receives a “you haven’t given yet” letter on December 12 will remember the mistake longer than the appeal.
What to Write: One Story, One Ask, One Deadline
A year-end appeal letter that works has a shape donors can follow in under a minute. Open with one person or one family the organization helped — a name, a situation, a result — not with the organization’s history. Connect that story to the ask in a single sentence: this gift keeps that work going. Name the deadline plainly: “Please give by December 31” or, for the early mailing, “Join us on GivingTuesday, December 1.” Close with exactly how to give: the reply slip and envelope for mail, and the organization’s giving page address for donors who prefer to give online.
Two cautions belong in every appeal. First, never promise a tax outcome. A line such as “gifts are tax-deductible to the extent allowed by law” is honest; a guarantee about any individual donor’s deduction is not, and donors should be pointed to their own tax adviser for their situation. Second, keep the ask to one amount frame: a short ladder of suggested gifts on the reply slip (“$50, $100, $250, other”) helps donors decide faster than an open-ended plea, and the amounts should reflect what this list actually gives.
How to Tell Whether It Worked
Give each mailing a way to be counted. The simplest version costs nothing: a different reply code on each mailing’s reply slip, so gifts can be attributed to the appeal, the GivingTuesday reminder, or the deadline letter. Count four numbers for each job: pieces mailed, gifts received, dollars raised, and new versus returning donors. A reminder postcard that brings in 40 gifts from 2,000 cards is a very different result from one that brings in 4, and you cannot tell which you sent unless you measure it. Keep the same four numbers for next November, and the second year’s appeal practically plans itself — including which segment deserved the hand-signed letter.
Common Mistakes to Avoid
- Mailing the appeal in December. A year-end appeal mailed December 15 is a souvenir, not an appeal — donors have no time left to act.
- One letter doing four jobs. Appeal, GivingTuesday announcement, deadline warning, and last year’s thank-you on the same pages means none of them lands.
- Putting donor details on a postcard. Giving history, gift amounts, and personal notes belong in a sealed letter, never on a card anyone handling it can read.
- Forgetting to suppress responders. A deadline warning sent to someone who already gave teaches donors your mail does not pay attention.
- Guessing the weight. Weigh a finished, stuffed sample. One extra ounce across 2,000 letters is $580.
- Square envelopes for the appeal. The $0.49 nonmachinable surcharge applies to every piece — $980 on a 2,000-piece run — for no benefit to the donor.
- Promising a tax result. Say gifts are deductible to the extent allowed by law and point donors to their tax adviser; never guarantee an individual’s deduction.
- Skipping the thank-you. The January letter is both gratitude and, for larger gifts, the written acknowledgment donors need. A donor thanked promptly gives again; a donor left wondering gives elsewhere.
Frequently Asked Questions
When should a nonprofit mail its year-end appeal?
In mid-November — by November 13 in the schedule above. Donors need time to read the appeal, respond on GivingTuesday (December 1, 2026), and give again before December 31. An appeal mailed in mid-December competes with the holiday mail peak and leaves almost no decision window.
Is GivingTuesday a separate campaign from the year-end appeal?
No — treat it as a reminder pointing at the same campaign. The appeal letter makes the full case in November; a short postcard or letter just before December 1 reminds donors to give on GivingTuesday itself. Running two competing appeals in the same month splits attention and doubles the ask.
Should a nonprofit appeal be a letter or a postcard?
A sealed letter for the appeal: it carries a personal ask, a reply slip, and a reply envelope, and nothing about a donor’s giving should be visible in transit. Postcards suit short reminders, such as the GivingTuesday nudge, where the message is generic and the ask is a single date.
How much postage does a 2,000-piece appeal mailing cost?
At retail prices, 2,000 one-ounce letters at $0.82 cost $1,640, and a postcard reminder to the same list at $0.65 adds $1,300 — $2,940 for the two touches, before printing and handling. If the stuffed letter weighs 2 ounces, the appeal run alone rises to $2,220, so weigh a finished sample first.
Can a nonprofit use Marketing Mail or presorted mail for an appeal?
Possibly, for larger lists — presorted and Marketing Mail options exist for bulk mailings, and a mail house can quote them. Do not assume a per-piece price without a written quote, and remember that Marketing Mail moves more slowly than First-Class Mail, so a deadline-driven appeal needs to go out earlier than a First-Class schedule.
What should the thank-you letter include?
Prompt thanks, the gift amount and date as the donor’s record, and one concrete note on what the gift supports. For a single gift of $250 or more, donors generally need a written acknowledgment from the charity to claim a deduction, so the January letter is a compliance step as well as good manners — and it should go out promptly, not months later.
Can the appeal letter promise donors a tax deduction?
No. Say that gifts are tax-deductible to the extent allowed by law and point donors to their own tax adviser for their situation. Never guarantee any individual donor’s deduction, and never state a tax result the organization cannot verify for that donor.
Sources
- USPS — First-Class Mail (postage prices: $0.82 first ounce, $0.29 additional ounce, $0.65 postcard, $0.49 nonmachinable surcharge, flats from $1.69; verified November 4, 2026)
- USPS — 2026 Holiday Shipping Deadlines (domestic First-Class Mail recommended send-by December 17, 2026; Priority Mail December 18; Priority Mail Express December 19; verified November 4, 2026)
- GivingTuesday — Generosity Week Guide (GivingTuesday December 1, 2026; Generosity Week December 1–5, 2026)
Related Guides
- A Complete Guide to Business Holiday Mailing
- Planning a Bulk Holiday Mailing Campaign
- Holiday Mailing Tips for Businesses
- How to Send Holiday Cards to Customers
By James Miller, editor of BuyHolidayStamps.com. Miller spent his USPS career in commercial mail and edits the site from Atlanta, Georgia. Last fact-checked: November 4, 2026. Prices and dates above are USPS retail figures verified against the official pages linked under Sources; GivingTuesday’s date is per GivingTuesday’s own guide; nonprofit practices, segment suggestions, and illustrative examples are editorial guidance, not USPS rules or tax advice.