USPS Coupon Codes in September 2026

Yes. USPS ships Priority Mail and Priority Mail Express boxes, envelopes, tape, and labels to your home at no charge through the Postal Store, and orders arrive in about two to five business days via Ground Advantage.

To order, open the Postal Store, filter to Free Shipping Supplies, and pick the box or envelope size you need. Most items ship in packs of ten or 25, and Flat Rate boxes can be ordered as a single. For one or two boxes on short notice, any Post Office counter will hand them over at no charge, or larger orders can go through the Package Supply Center at 1-800-610-8734.

The rule that undoes the savings is service matching. A Priority-branded box has to ship as Priority Mail or Priority Mail Express, and using one for Ground Advantage or Media Mail leads to postage due at delivery. Flat Rate is the highest-value piece of the free lineup for heavy shipments crossing multiple zones, like a stack of books or a small tool set, since the price stays the same up to 70 lbs within the US.

For books, printed sheet music, and educational DVDs, the cheaper move is Media Mail, the lowest-cost service USPS offers, which ships in a plain box rather than a Priority-branded one.

Yes. USPS Package Pickup is free for Priority Mail Express, Priority Mail, Ground Advantage, and prepaid return labels, collected by the carrier during the regular route. The paid alternative, Pickup on Demand, runs $26.50 per pickup for a scheduled two-hour window, so every free pickup used in place of the paid slot is $26.50 back in the shipper's pocket.

The rule to know is that the batch has to include at least one Priority Mail, Priority Mail Express, Ground Advantage, or Returns package to qualify. A pickup request for plain First-Class letters alone will not go through.

For same-day pickup, schedule it the night before and have every package labeled, sealed, and set out by 2 a.m. Central. A request submitted after that cutoff gets bumped to the next day.

Free pickup is the default for anyone shipping a few packages a week, like Etsy sellers, resellers clearing weekend orders, or households returning holiday gifts. The paid $26.50 slot only earns its keep when a shipment genuinely has to leave before the regular carrier arrives, like a Priority Mail Express package racing a next-day guarantee.

Not in the way most retailers do, since USPS doesn't run a percentage-off program for service members. What it does have is a set of pricing rules that make it cheaper for anyone mailing to a military address overseas, usually family or friends sending care packages.

Packages to APO, FPO, and DPO addresses ship at domestic postage rates instead of international rates, so a care package to a base overseas costs the same as one sent across the US. The Priority Mail APO/FPO Large Flat Rate Box goes a step further with a $1.45 military discount on the postage, bringing the total to $32.55 regardless of weight. For anyone sending heavy care packages regularly, that flat rate is where the real money adds up.

Since most care packages ship in Priority Mail boxes anyway, ordering the packaging free closes out the total cost. Free Priority Mail boxes, tape, labels, and customs forms are all available through the USPS Package Supply Center at 1-800-610-8734. Letters and greeting cards do not need any of this, since a regular First-Class stamp already covers them at the standard domestic rate.

For most everyday parcels, USPS Ground Advantage is the cheapest choice. A 1-lb shipment starts around $6 to $8 depending on distance, with two- to five-day delivery, tracking, and up to $100 in insurance built in. The same 1-lb package on Priority Mail costs a few dollars more and only tightens the delivery window by a day or two, which is why shippers reaching for Priority Mail out of habit are the biggest source of USPS overpayment.

Media Mail beats both of those on price, starting just under $5 for 1 lb, but the service is restricted to books, printed sheet music, sound recordings, and educational DVDs. USPS is allowed to open Media Mail parcels to check the contents, so slipping a magazine or personal item into a book shipment leads to postage due that hands the recipient a bill at the door.

Priority Mail earns its higher price for heavy packages traveling multiple zones. A Large Flat Rate Box runs around $25 and ships up to 70 lbs anywhere in the US, so a 15-lb box going a few states away comes out cheaper as Flat Rate than as Ground Advantage priced by weight and distance.

The quick way to think about it is Ground Advantage first, unless the box holds only qualifying media items or the shipment is heavy enough that a Flat Rate box beats paying by weight and zone.