Year-end appeal mail: back-planned from December 1

The two dates a year-end appeal aims at

Work backward from two dates, not one: Giving Tuesday falls on Tuesday, December 1, 2026, and the tax year closes Thursday, December 31. To land before Giving Tuesday, artwork is due in mid-October and the mail has to be at the Post Office by the end of that month; to beat December 31, both move about three to four weeks later.

The dates do different jobs. Giving Tuesday is an attention date — your letter arrives while giving is already the subject of every inbox and newscast. December 31 is a literal deadline: a gift is generally deductible for the tax year in which it is made, and the rules that decide when a check, a card gift, or a postmarked envelope counts belong to your accountant, not to us.

Thanksgiving sits between them, on Thursday, November 26, and mail arriving that week competes with travel and catalogs. Aim the Giving Tuesday piece at the week of November 16.

What is actually in an appeal package

A classic appeal is four printed pieces, and each is a postage decision as much as a design decision. Letter-size limits are firm: 5 inches long by 3-1/2 inches high at the smallest, 11-1/2 by 6-1/8 at the largest, and 0.007 to 1/4 inch thick (USPS Postal Explorer). Exceed any one of those and the piece is a flat, at flat prices.

• The letter

  Personally addressed, signed by a person rather than an organization. On your own letterhead it reads like a letter rather than a flyer, which is the point.

• The outer envelope

  A #10, because everything else folds into it. A window saves an addressing pass; a closed face with a printed address looks less like a bill to the donor.

• The reply device

  The card the donor fills in — amount, designation, address corrections. Small enough to fold into the reply envelope, with their name on it.

• The reply envelope

  A #9 nests inside a #10 unfolded, which is why that pair exists. Sent blank, the donor supplies the stamp; a Business Reply permit means you pay only on the ones that come back — permits and fees apply, so confirm the requirements with USPS.

Stacked together the four usually stay under the ceiling for a machinable letter, but heavy stock or a second insert can push you past it. Carrier Route, automation, and machinable nonautomation USPS Marketing Mail letters can weigh up to 3.5 ounces, and USPS charges the same postage at 1 ounce as at 3.5 — so the ounces between those two numbers are free. Go over 3.5 and a letter-size piece pays flat prices no matter what its dimensions are. Our mailer size rules guide covers the shapes that price badly.

The calendar, counted backward

The same schedule twice: once for a package landing before Giving Tuesday, once for one that only has to beat December 31. These are planning targets, not production times. USPS publishes a service standard for Marketing Mail but treats the class as deferrable — a target rather than a delivery commitment — so each column leaves two to three weeks between the drop and the in-home window.

Read it bottom-up and the useful fact falls out: artwork for a Giving Tuesday appeal is due in mid-October, six weeks before the date it is named after.

Nonprofit Marketing Mail, and what qualifying takes

Nonprofit USPS Marketing Mail prices sit below the commercial equivalent, and across a full list that difference is real money. What we cannot do is get them for you: the authorization belongs to your organization. You apply on PS Form 3624 — submitted to your postmaster, to a Business Mail Entry Unit, or online through the Business Customer Gateway — with your formative papers, your IRS letter of exemption from federal income tax, and evidence of nonprofit status. There is no fee to apply. USPS says a hardcopy application usually takes about two weeks to approve and that applying online can be faster, and once an organization is authorized it may mail at nonprofit prices at any Post Office that accepts presorted mailings (Domestic Mail Manual 703.1.7.6).

Two caveats. First, an IRS determination letter is not by itself a USPS authorization — they are separate decisions by separate agencies. DMM 703.1.2 lists the qualifying categories as religious, educational, scientific, philanthropic, agricultural, labor, veterans, and fraternal organizations; DMM 703.1.4.1 names organizations that do not qualify, among them business leagues, chambers of commerce, trade associations, service clubs, and social and hobby clubs. Second, all Marketing Mail is bulk mail: a mailing has to meet 200 pieces or 50 pounds, and it also runs on a mailing permit, which is a separate thing again from the nonprofit authorization. Confirm your own status and paperwork with USPS or your Business Mail Entry Unit before you budget the postage, and see our 2026 USPS rate change post for what postage is doing this year. We handle the mailing side under your authorization, not ours.

Personalization that does not wreck the mail file

Variable data is the cheapest lift in the package: the donor’s name in the salutation, their last gift in the opening line, ask amounts stepped from their giving history, their name preprinted on the reply device. None of it costs more paper. All of it depends on a clean file.

One rule shapes how far you can take it. USPS Marketing Mail is advertising, not correspondence: DMM 243.2 allows personal information beyond the name and address only where it is directly related to the solicitation and included to support it, and bars handwritten or typewritten matter. A stepped ask based on last year’s gift is squarely on-side; a chatty handwritten note in the margin is not. If you want the piece to read as a personal letter in the fullest sense, mail it First-Class instead, and confirm any borderline content with your Business Mail Entry Unit before the run prints.

So spend the time on the file. One row per household, or you mail the same couple twice and they both mention it. Run address correction before the drop. Decide what a blank field prints — “Dear ,” gets screenshotted. Personalize only the fields you trust, and proof the merge against real records rather than sample data.

The second ask, in the middle of December

The appeal is not one mailing. A short second piece in mid-December reaches the donors who meant to give and then got December. Make it a postcard, not another package: one sentence of reason, the deadline, two ways to give. Mail it First-Class, and suppress everyone who has already given — nothing sours a donor faster than being asked twice.

Before you commit, our direct mail ROI guide walks the arithmetic and the mailing cost calculator gets you a number for print plus postage. We do this work for nonprofits across Wright County and the west metro; if the appeal funds next year’s events, our nonprofit event print guide is next.

Frequently asked questions

• When should a nonprofit start its year-end appeal mailing?

  Late September for a Giving Tuesday landing, mid-October for a December 31 landing. Working back from an in-home week of November 16: artwork due around October 14, proof approved the week after, mail file locked a week later, and the mail dropped by October 30.

• How many pieces do you need to mail at nonprofit postage rates?

  Every USPS Marketing Mail mailing, nonprofit or commercial, has to meet 200 pieces or 50 pounds — there is no single-piece Marketing Mail price. Your organization also has to hold its own authorization, applied for on PS Form 3624. Under 200 pieces, First-Class is the route.

• Does a reply envelope actually pay for itself?

  We will not quote a response-rate figure; the honest ones are specific to a list and a cause. The mechanical argument is the real one: a reply envelope removes the step where the donor has to find an envelope, and every step you remove is a place the gift stops.

• Should the year-end appeal go First-Class or Marketing Mail?

  It depends on quantity and how tight the date is. Marketing Mail is priced for volume and needs at least 200 pieces, but USPS treats the class as deferrable — its service standard is a target, not a delivery commitment — so it wants two to three weeks of runway. First-Class suits a small list or a late second ask.

• Can you print and mail our year-end appeal for us?

  Yes — letter, envelopes, and reply device designed in Buffalo, produced through our print partners, then mail merged, folded, inserted, and mailed. The nonprofit mailing authorization stays yours, since USPS issues it to your organization. Send your list size and target in-home date and we will build the calendar.