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Mercari Ground Advantage labels go up: 1 lb $7.48 to $7.99
From October 19, 2026, most Mercari prepaid USPS label prices go up for new and existing listings. At the Best rate, Ground Advantage goes from $4.91 to $5.39 at 4 oz, $7.48 to $7.99 at 1 lb and $12.83 to $13.99 at 3 lb, and Priority Mail 2 lb goes from $15.29 to $16.29. Standard rates (packages over 1 cu ft or longer than 22 in) rise more: Ground Advantage 1 lb goes from $7.59 to $8.99.
Your net on a $10 / $25 / $50 sale: -$0.51 / -$0.51 / -$0.51
If you pay for a 1 lb Best-rate Ground Advantage label. 4 oz Best: -$0.48; 3 lb Best: -$1.16; 1 lb Standard: -$1.40. If the buyer pays shipping, Mercari's 10% fee on shipping rises: -$0.05 on 1 lb (fees.js mercariFees).
Source: Mercari help: Fees on Mercari + Shipping change announcements (Sep 17, 2026) · verified
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Mercari Media Mail labels get cheaper: 1 lb $4.99 to $4.47
From October 19, 2026, Mercari's prepaid Media Mail labels cost $4.47 for 1 lb (was $4.99), $5.22 for 2 lb (was $5.99) and $5.97 for 3 lb (was $6.99). The new prices apply to new and existing listings, whether the buyer or the seller pays shipping. Even so, they're $0.08 to $0.11 above USPS's own Media Mail prices ($4.39 for 1 lb).
Your net on a $10 / $25 / $50 sale: +$0.52 / +$0.52 / +$0.52
If you pay for a 1 lb Mercari Media Mail label. 2 lb: +$0.77; 3 lb: +$1.02. If the buyer pays shipping, Mercari's 10% fee on shipping falls: +$0.05 on 1 lb (fees.js mercariFees).
Source: Mercari help: Fees on Mercari + Shipping change announcements (Sep 17, 2026) · verified
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Mercari splits USPS's $50 hazmat fee: sellers pay $25
Since July 12, 2026, USPS has charged $50 when a package of non-hazardous items carries a visible HAZMAT label, often an old label on a reused box. For Mercari packages postmarked from September 1, 2026, Mercari pays $25 and takes $25 from the seller's earnings. To avoid it, remove or fully black out old hazmat labels.
Your net on a $10 / $25 / $50 sale: n/a / n/a / n/a
A penalty, not a per-sale fee: -$25 for each flagged package, nothing otherwise.
Source: Mercari help: Why was I charged for an overweight or oversized package? (Hazmat Fees) · verified
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