Kickstarter fees get most of the attention in campaign planning. Postage often costs more, and it is far less predictable, because it depends on where backers live.
Start with the cheapest domestic option. USPS Media Mail is limited to books and other qualifying media, and it is priced on a flat national scale with no zones. Under the July 12, 2026 price list, a one-pound package costs $4.39 and a two-pound package costs $5.13, whether it travels across town or across the country. A packed epic fantasy hardcover usually lands in that two-pound range. Tracking is included. Insurance is not, and starts at $2.80. Delivery runs two to eight days with no guarantee.
Domestic Shipping: Media Mail Rules and Limits
Media Mail has limits worth knowing before rewards are designed. USPS can open a package to check its contents, and if the box holds items that do not qualify, the shipment can be charged postage due at the correct rate. That matters when a reward tier bundles the book with pins, stickers, or other merchandise.
Takeaway: International backers are 20 percent of the campaign, but roughly 60 percent of the postage bill.
International is a different scale. USPS First-Class Package International Service starts at $19.40, according to USPS. Shipping platform Shippo's April 2026 commercial rates for a two-pound parcel were $27.65 to Canada and $33.98 to the UK, with transit times of 11 to 15 days.
The Math: Domestic vs. International Postage
Now the math. Take a 500-backer campaign shipping one two-pound hardcover each, with 80% of backers in the US and the rest split evenly between Canada and the UK. The 400 US packages cost about $2,052 in Media Mail. The 100 international packages, at an average of about $30.82 each, cost about $3,082. International backers are 20 percent of the campaign and roughly 60 percent of the postage bill.
Two more details matter this season. USPS has a temporary price increase running from October 4, 2026 to January 17, 2027 on Priority Mail and Ground Advantage, though Media Mail is not affected. And shipping charged through the Kickstarter pledge itself is part of the total that Kickstarter's fees are calculated on, which is one reason many book campaigns collect shipping afterward through a pledge manager.
Practical Steps Before Campaign Launch
The practical step is simple: price shipping by region rather than as one flat charge, and confirm current rates on USPS's own price list before launch, since USPS has changed these numbers more than once this year.
Map's Edge Media runs these numbers before a campaign launches, because the shipping line is where a funded book can still lose money.