Shared Mail, Decoded
Several non-competing local businesses share one large postcard mailed to every home in an area, each buying a single ad spot. Everyone reaches the same mailboxes; nobody pays for the whole drop. Here is how the split works, what a spot costs, and why this thing has five different names.
One oversized postcard goes to every home on a set of postal routes. On it are ads for a dozen or more local businesses, each in a different category, each paying only for their own spot.
The economics are the entire point. Printing and mailing 5,000 oversized cards costs roughly $2,500. Split across 14 advertisers, that is about $180 of real cost per advertiser — for the same 5,000 households a solo mailer would have paid the full $2,500 to reach.
Spots sell for more than cost, of course. The median is $477 per mailing, which is what pays the operator who assembles the card, handles the postal paperwork, and takes the risk of filling it.
A dozen local businesses split a direct mail bill none of them would pay alone, and each reaches every household on the route.
The single most confusing thing about this channel is that everybody calls it something different. If you are comparing quotes and the terminology keeps shifting, that is why — these all mean the same thing.
Short for cooperative — the advertisers cooperate on the cost. Common in agency and print-broker language.
The plainest description, and what most USPS-adjacent vendors call it. Also the phrase advertisers themselves tend to use.
Emphasizes the local angle. Operators often prefer it because it sounds like a neighborhood resource rather than an ad buy.
Named after the postcard size rather than the arrangement. Common among operators who learned the model from a course.
Points at the postal program underneath it — Every Door Direct Mail, which is how the card reaches every address on a route.
One genuine distinction worth knowing: co-op in some national advertising contexts means a manufacturer reimbursing a retailer's ad spend. That is a different thing entirely. In local direct mail, co-op means cost-sharing between unrelated neighborhood businesses.
Measured from 76 live operator sites across 81 markets — these are prices operators actually charge, not rate-card fiction.
| Billing model | Lower quartile | Median | Upper quartile |
|---|---|---|---|
| Per mailing | $250 | $477 | $810 |
| Per month | $250 | $450 | $720 |
Per-mailing and per-month pricing are tracked separately and never blended — they are different units and mixing them produces a meaningless average. Full distribution and method are in what operators actually charge per ad spot.
Co-op mail is a good buy when it is run well and a waste when it is not. The difference is almost always in these details.
Category exclusivity — confirm you are the only business of your type on the card
The actual mailing area, by route or zip, not a vague radius
Drop date, and how many pieces are going out
Spot size and position — front placements and coupon strips cost more for a reason
Whether the price is per mailing or per month, because those are very different commitments
Proof of the last card that mailed, ideally a physical copy
Most co-op cards are 9x12 inches — the largest piece that still qualifies for USPS Every Door Direct Mail flat rates, and big enough to give 14 advertisers a spot that does not feel like a classified ad.
The common smaller format is 6x11, which prints for roughly 40% less while carrying fewer or smaller spots. Postage is identical per piece either way, so the format choice is really a printing-cost and perceived-value decision.
If you need the actual dimensions, bleed, safe zone, and spot grid layouts, those live on our 9x12 postcard template and specs page. For how the postal side works, see what is EDDM.
Yes. Co-op postcard, shared postcard, shared mail, community card, and the 9x12 method all describe multiple local advertisers splitting one direct mail piece. The mechanics are identical; only the vocabulary changes.
A typical card carries 14 spots, with grids running from about 12 to 18. Categories are normally exclusive, so you should be the only business of your type on it.
It depends on what a customer is worth to you. At roughly a 4.4% direct mail response rate, a business with a few-hundred-dollar average job usually needs only one or two new customers to cover the spot. Very low-ticket businesses need much more volume to break even.
Yes, and that is the business model behind most of these cards. You sell the spots, coordinate one design, and keep the margin between what advertisers pay and what the drop costs.
Get a campaign site with your card preview, spot pricing, and advertiser lead capture — the thing that makes local businesses take you seriously.