Whatnot Stops Picking Up The Tab For USPS Shipping Weight Adjustments
Whatnot will begin making US sellers responsible for USPS weight-based shipping adjustments on November 4, ending its previous practice of covering additional postage when packages weigh more than declared.
When Whatnot announced its August shipping changes in June, it said USPS Flat Rate shipping would be eliminated and Ground Advantage would become the default service. Flat Rate ultimately remained available, while some of the rates in the current shipping guide differ from those originally announced. The company is also testing discounted UPS Ground Saver shipping for heavier packages with a limited group of sellers.
Liz Morton
Buyers now pay $7.75 for Ground Advantage packages weighing 1-5 lbs regardless of shipping distance, compared to the $7.20 rate Whatnot initially projected when it announced the August changes in June.
Final rates for lighter packages also differ slightly from those original projections, with shipments weighing 4-8 oz now costing $4.85 instead of $4.89 and packages weighing 12-16 oz costing $6.75 instead of $6.57. The $4.47 rate for packages under 4 oz and $5.25 rate for 8-12 oz shipments remain unchanged from the original announcement.
For larger orders or bundles, UPS Ground Saver offers buyers rates of $11 for packages weighing 6-10 lbs, $12.99 for 11-15 lbs and $18.40 for 16-20 lbs, regardless of shipping distance within eligible delivery areas. Packages over 20 lbs are priced based on weight and destination, with Whatnot claiming average savings of 40% compared to USPS.
For comparison, USPS Ground Advantage pricing currently starts at $9.69 for shipments over 5 lbs but increases based on weight and distance, while Priority Mail starts at $11.45.
UPS Ground Saver has an estimated delivery time of 2-7 business days, compared to 2-5 days for Ground Advantage, and sellers must provide their own packaging. UPS also charges for package pickups, while USPS offers free scheduled pickups with regular mail delivery.
UPS Ground Saver is currently limited to participating sellers in the contiguous 48 states, with a broader rollout planned but no date announced. The service is unavailable for deliveries to Alaska, Hawaii, Puerto Rico, military addresses, PO boxes and certain remote ZIP codes, as well as shipments with an order subtotal of $500 or more in categories requiring signature confirmation. Those shipments automatically revert to USPS Ground Advantage.
Buyers in some rural and small-town ZIP codes will face an additional $3.45 extended delivery area charge, which Whatnot estimates will affect about 14% of buyers. That surcharge is included in the shipping price shown before purchase rather than being billed separately to sellers.
USPS Flat Rate shipping has remained available at a temporarily subsidized $12.99 per shipment since July 31, though sellers must enable the service in their shipping settings.
Unlike Ground Advantage and UPS Ground Saver, Flat Rate requires sellers to use official USPS Flat Rate packaging, which remains available free from USPS. The service is limited to qualifying orders placed during live shows, with the $12.99 charge applying to each shipment weighing more than 1 lb and up to 70 lbs, regardless of distance or which Flat Rate box or envelope is used.
Whatnot says Flat Rate shipping will remain available after the current subsidy expires, but pricing will change, with at least one month's notice before new rates take effect.
Beginning November 4, Whatnot will stop covering USPS weight-based carrier adjustments, making sellers responsible for additional postage when packages weigh more than declared on Whatnot-generated shipping labels. The company says these are charges assessed by USPS, with no additional Whatnot fee.
The change applies to shipments sent on or after November 4, with Whatnot continuing to cover adjustments for earlier shipments, incorrect package dimensions, hazardous materials labeling and UPS shipments for now. Sellers whose first Whatnot sale occurred on or after September 5, 2026 are exempt from the initial rollout and will receive separate notice before the policy applies to them.
Sellers can review and appeal charges through Whatnot's Carrier Adjustments dashboard, which shows the original shipping information, carrier measurements and additional postage assessed. They'll have 45 days from the date they're charged to appeal, with USPS making the final decision, a process that can take up to 90 days.
Whatnot will also continue covering additional label costs for up to five qualifying shipping corrections per week when sellers update package information before generating a label, subject to existing limits. The company says it began providing sellers with better visibility into carrier adjustments in April and that more than eight out of ten sellers who previously received adjustments have since reduced them.
