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Ship a bottle of perfume or an old phone battery the wrong way, and the US Postal Service will now charge fifty dollars for it. The $50 hazmat non-compliance fine took effect on July 12, 2026, under a new compliance law applying across all USPS competitive services to enhance transportation safety. The same day, Forever stamps rose to 82 cents from 78 cents. Behind both changes sits an agency warning it could run out of cash within a year.
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Nail Polish, Perfume and Lithium Batteries Now Trigger the Fine
The list of newly enforced items reads like a bathroom cabinet. Essential oils, nail polish and remover, perfumes, colognes, hand sanitizer, inks, stains, varnishes, hairspray and devices containing lithium batteries all fall under USPS hazardous materials rules. Anyone mailing these products must package them correctly and attach the right hazmat label before dropping them in a mailbox. Skip that step, and inspectors can flag the package anywhere in the postal network, long after it leaves the counter.
A $50 Charge Now Hits Undeclared or Mislabeled Shipments
The fine applies to any package containing hazardous material that isn’t properly declared, labeled, or packaged, according to a Pitney Bowes breakdown of the rules. Non-compliance covers shipping a lithium-battery-powered device without declaring it, sending nail polish through Priority Mail without the required designation, or using incorrect packaging for regulated materials. Miss any of those steps, and USPS can assess the charge regardless of whether the shipment reaches its destination safely.
Priority Mail Shipments Carry an Extra $7.50 Hazmat Fee
Even properly labeled hazardous packages aren’t free of new costs. Those using Priority Mail or Priority Mail Express must also pay a $7.50 hazardous materials handling fee. The charge applies whether the shipment contains a bottle of hairspray or a laptop battery, as long as the hazard class is correctly declared. USPS says the fee reflects the added handling hazardous materials require inside its air network.
Reused Shipping Boxes Are Tripping Up Sellers the Most
The most common cause of the fine has little to do with what’s inside the box. Reusing a shipping box that still displays a lithium battery sticker or another hazmat marking from a previous shipment can create compliance issues, even when the current contents aren’t hazardous. The fee also reaches further than expected. According to EcommerceBytes, the $50 noncompliance fee applies to all commercial packages, including Ground Advantage, not just Priority Mail.
Forever Stamps Jump to 82 Cents the Same Day
The hazmat crackdown landed the same day USPS raised its most familiar price. Forever stamps rose to 82 cents from 78, part of a broader round of hikes that also pushed domestic postcards to 65 cents and international letters to $1.75. According to CBS News, it’s the sixth stamp price increase in five years, a 34% climb since 2021. Stamps bought earlier still work at full value.
Postcards, International Letters and Other Mail Costs Rise Too
More than the stamp price changed that day. Metered one-ounce letters climbed to 78 cents, domestic postcards rose to 65 cents, and international postcards and letters increased to $1.75. USPS also adjusted prices for other First-Class Mail products, Periodicals, USPS Marketing Mail, Package Services and selected Special Services. The additional-ounce rate for single-piece letters stayed flat at 29 cents, one of the only prices left untouched.
Steiner Warns Congress USPS Could Run Out of Cash in a Year
Behind the fees and price hikes sits a stark warning from Postmaster General David Steiner. Testifying before the House Oversight Committee in March, according to Federal News Network, Steiner said less than a year from now, the Postal Service will be unable to deliver the mail if it maintains the status quo. That warning has pushed USPS to squeeze revenue from every available source.
Mail Volume Has Collapsed 50% Since 2006, Steiner Says
Steiner’s testimony pointed to a decades-long decline behind the crisis. Mail volume has dropped from a 2006 peak of roughly 213 billion pieces a year to about 104 billion today, a decline Steiner calculated at roughly $81 billion in lost revenue. USPS has already suspended contributions to employee retirement funds to save cash, and Steiner has floated stamp prices reaching 90 to 95 cents to close the gap.
A $50 Fee and Pricier Stamps Reflect a Postal Service Under Pressure
The hazmat fine and the stamp increase work together as two pieces of an agency trying to close a widening gap between what it spends and what it earns, using every lever short of cutting delivery days. For customers, that means checking labels before mailing a bottle of perfume, and paying more for the stamp that sends it. The cost of using the mail has quietly changed for good.