How to Combine Postage on eBay, Create Flat or Promotional Shipping Rules Easily 2026

Combined shipping rules are account-level settings, so you need to be signed in to the seller account whose listings you want them applied to, not just browsing eBay as a guest. From the eBay homepage, click Sign in and enter your credentials, or use Continue with Google if that's linked to your account. eBay will remember the account you're switching from if you manage more than one, so double check you're on the right storefront before changing anything — shipping rules apply store-wide, across every active listing.

From My eBay or Seller Hub, look in the left-hand menu for Shipping preferences, usually grouped near Automate feedback and Return preferences under your account settings. eBay uses "Postage preference" and "Shipping preference" interchangeably in different parts of the interface — both point to the same settings area, so don't worry if the wording shifts between pages. This is also where general shipping defaults live, like your handling time and dispatch location, so it's worth a quick look at the rest of the page while you're there.

Inside Shipping preferences, find and click into Combined shipping rules. From there, select Create flat shipping rules, which opens a dialog for setting how postage is charged once a buyer adds more than one item to their order. The dropdown defaults to "Add an amount for each additional item," which is the most common setup: the buyer pays full postage for their first item, then a smaller flat add-on for every item after that, rather than paying full shipping multiple times.

Enter the additional-item charge as a fixed amount — for example, if your standard shipping is $6 and you want each extra item to add only $2, that's what goes in the "Each additional" field. Give the rule a clear Profile name, since you can create multiple shipping profiles for different categories of listings (lightweight items versus bulky ones, for instance) and reuse them later. Click Add profile, then Save, and the rule is stored under Combined shipping rules ready to be applied to your listings.

Below the flat shipping rule section sits a separate Promotional shipping rule option, which lets you go further than a flat add-on — for example, offering free shipping on the second item, or a percentage discount once an order crosses a certain value. This is the setting to use during a sale event or clearance push, since it's more aggressive than the standard flat rule and clearly reads as a limited-time offer to buyers browsing your store. Like the flat rule, it's saved as its own profile so you can switch it on and off without rebuilding it each time.

A saved shipping rule doesn't automatically apply to every listing — check your listing's shipping details or use the bulk edit tool in Seller Hub to assign the correct shipping profile to the items you want covered. Once applied, add two or more of the eligible items to a cart yourself (or ask a trusted buyer to) and walk through checkout to confirm the discounted or flat postage actually calculates correctly before it goes live to real customers. This is the same page eBay flags for exclusions, so review the exclusions list too if certain items shouldn't be part of the combined rate, like oversized or international-only listings.