How to Get Free USPS Shipping Boxes
USPS offers free Priority Mail boxes, envelopes, and tubes — and they'll ship them to your door at no charge. This is one of the most underused benefits in small business shipping. If you're regularly shipping with Priority Mail, paying for boxes is leaving money on the table.
The catch: free USPS boxes must be used for Priority Mail shipments. You cannot use them for other services — technically they're the property of USPS and using them for non-Priority shipments is against postal regulations. In practice, enforcement is inconsistent, but it's worth knowing.
How to Order Free USPS Boxes
Go to store.usps.com and navigate to 'Free Shipping Supplies.' Create a USPS.com account if you don't have one. Browse the available boxes, envelopes, and tubes, add them to your cart, and check out — the total will be $0. Standard shipping to your address takes 5–7 business days. There are limits on how many of each item you can order per transaction.
USPS allows multiple orders over time, so you can reorder when your supply runs low. Some items have per-order quantity limits (typically 10–25 per SKU per order), but there's no lifetime cap on how many orders you place.
- Priority Mail Small Flat Rate Box: 8-11/16 x 5-7/16 x 1-3/4 inches
- Priority Mail Medium Flat Rate Box (Top-Loading): 11-1/4 x 8-3/4 x 6 inches
- Priority Mail Medium Flat Rate Box (Side-Loading): 13-5/8 x 11-7/8 x 3-3/8 inches
- Priority Mail Large Flat Rate Box: 12-1/4 x 12-1/4 x 6 inches
- Priority Mail Flat Rate Padded Envelope: 12-1/2 x 9-1/2 inches
- Priority Mail Regional Rate Box A and B: variable pricing by zone, often cheaper than flat rate for heavier items
- Priority Mail Flat Rate Legal Envelope, Window Envelope: useful for documents
Which Free Box to Use for Your Product
The right box depends on your product dimensions and weight. Flat Rate boxes are best when your item is heavy relative to its size — you're paying one fixed price regardless of weight. Zone-based Priority Mail boxes (standard boxes, not flat rate) are better when your item is light or going only 1–2 zones away.
Regional Rate boxes are often overlooked but highly cost-effective: they're priced by zone rather than flat rate, and typically beat both standard Priority Mail and flat-rate pricing for medium-weight packages going 1–4 zones. Regional Rate Box A holds up to 15 lbs and costs significantly less than the Large Flat Rate box for nearby zones.
💡 Before committing to a flat-rate box, compare the cost against zone-based Priority Mail or USPS Ground Advantage for your specific package. Use the USPS rate calculator or Pirateship's side-by-side pricing. Flat rate is not always cheaper — it's only best when the package is heavy and going far.
Tips for Getting the Most from Free USPS Supplies
Order before you run out. USPS delivery on free supplies takes up to a week, so order when you're at 50% stock, not 10%. Keep a consistent reorder cadence based on your volume — if you ship 50 packages per week, order a 2–4 week buffer.
USPS also offers free Priority Mail tape at store.usps.com. It's branded Priority Mail tape, but it's free and works fine. Combine it with your free boxes and you've eliminated your box and tape costs for Priority Mail shipments entirely.
ℹ️ You can pick up free USPS Priority Mail supplies directly at your local Post Office without ordering online. Selection is more limited in-store, but it's immediate. Useful if you've unexpectedly run out and have packages to ship today.
Complete List of Free USPS Supplies
Beyond the headline flat rate boxes, USPS provides a wide range of free shipping materials:
- Priority Mail boxes: small flat rate, medium flat rate (top and side loading), large flat rate, regional rate A, regional rate B
- Priority Mail envelopes: flat rate envelope, padded flat rate envelope, legal flat rate envelope, window flat rate envelope
- Priority Mail Express boxes and envelopes: separate inventory specifically for Express shipments
- Priority Mail tape: 2-inch wide branded packing tape (works for any USPS shipment)
- Address labels: blank Priority Mail and Express labels for handwriting addresses
- Customs declaration forms (CN22, CN23): free for international shipments
- Hold Mail forms, Change of Address forms: paper forms for mail-related services
- APO/FPO/DPO Priority Mail flat rate box: discounted military flat rate box, priced lower than regular Large Flat Rate
- International Priority Mail boxes: separate sizes for international shipments
How to Order: Step by Step
Three reliable ways to get free USPS boxes:
- Online at store.usps.com → Free Shipping Supplies → browse boxes/envelopes/tape → add to cart → checkout (total $0). Standard delivery in 5–7 business days.
- Pick up at any Post Office: most lobbies have racks of common Priority Mail sizes. Walk in, take what you need (within reasonable quantity), no purchase necessary. Some sizes regularly out of stock — call ahead for specific items.
- Request from your mail carrier: leave a note in your mailbox listing the boxes you need; the carrier delivers them on the next route. Best for established residential addresses with a regular carrier.
- Multi-size starter pack: order 5–10 of each common size to keep an inventory at home; reorder as you use them
Restrictions on Free USPS Boxes
Free USPS supplies have one major restriction that many shippers don't realize:
- Priority Mail only: free boxes must be used for Priority Mail or Priority Mail Express shipments — not Ground Advantage, Media Mail, or other services
- Postal Service property: technically all boxes remain USPS property; using them for non-Priority Mail violates postal regulations
- Enforcement is inconsistent: USPS rarely audits individual shippers, but for high-volume operations using flat rate boxes for Ground Advantage, USPS will eventually charge the upgrade fee
- Box must close normally: cannot bulge, cannot tape lid open, cannot force-close — USPS rejects misused flat rate boxes at acceptance
- International boxes for international shipments only: same rule applies
- Reuse for other carriers (UPS, FedEx): not allowed — Priority Mail boxes are USPS-branded and the carriers themselves typically reject them at acceptance
Quantity Limits and Order Rules
USPS allows generous but not unlimited quantities per order:
- Per SKU per order: typically 10–25 of each specific item
- Per order total: no overall cap on number of items, just per-SKU limits
- Reorders: USPS allows multiple orders over time — there's no annual cap or lifetime limit
- Out-of-stock items: certain sizes (especially Medium and Large flat rate) are occasionally backordered for weeks during peak season
- Account required: free USPS account at usps.com — sign up takes 2 minutes
💡 Order more than you think you need, especially before peak season (October–December). USPS supply backorders are most common for Medium and Large Priority Mail flat rate boxes, which are the most popular sizes for ecommerce.
Free Boxes for Other Carriers (UPS, FedEx, DHL)
USPS isn't the only carrier offering free packaging. Each carrier has free supplies for their specific service tiers:
- FedEx One Rate boxes: free at FedEx Office locations or via fedex.com, only for One Rate shipments
- FedEx Express envelopes and packs: free at FedEx Office locations for FedEx Express shipments
- UPS Express envelopes and tubes: free at UPS Stores for UPS Express shipments only
- UPS Simple Rate: does NOT include free boxes — you provide your own (UPS Simple Rate is one of the few flat-rate programs without free packaging)
- DHL: limited free packaging, mostly for high-volume business accounts
- All carrier free packaging is service-specific: you cannot use FedEx envelopes for UPS shipments and vice versa
When Free USPS Boxes Don't Make Sense
Free supplies are great, but Priority Mail isn't always the right service:
- Light packages going short distances: Ground Advantage in your own box is often cheaper than Priority Mail flat rate, even with free packaging
- Heavy items going long distances: free Large Flat Rate Box is excellent — Priority Mail flat rate beats weight-based for these scenarios
- Custom-branded packaging: free USPS boxes are USPS-branded, not your brand — for premium ecommerce experiences, custom poly mailers may be worth the cost
- Subscription boxes: USPS Priority Mail flat rate is competitive but most subscription operations use custom-branded boxes for the unboxing experience
- International shipments: free Priority Mail International boxes work but are much more expensive than domestic; verify the math before defaulting to flat rate
Frequently Asked Questions
Are USPS Priority Mail boxes really free?
Yes — USPS provides Priority Mail boxes, envelopes, tubes, and tape free of charge. You only pay for the postage.
How do I order free USPS boxes?
Go to store.usps.com → Free Shipping Supplies → select boxes and quantities → checkout (total is $0). Or pick up at any Post Office, or request from your mail carrier.
How long does it take to receive free USPS boxes?
5–7 business days for online orders. In-store pickup is immediate. From your mail carrier, typically 1–2 days.
What's the limit on free USPS boxes per order?
Typically 10–25 of each specific item per order. No overall cap on number of items per order, and no lifetime limit on number of orders.
Can I use free USPS boxes for Ground Advantage?
No. Priority Mail boxes are designated for Priority Mail or Priority Mail Express shipments only. Using them for Ground Advantage triggers an upcharge or rejection at acceptance.
Can I use free USPS boxes for UPS or FedEx?
No. Free USPS boxes are USPS-branded and intended for USPS shipments. UPS and FedEx have their own free packaging for their specific services.
Are USPS Priority Mail tubes free?
Yes. USPS provides free triangular tubes for shipping rolled documents, posters, and similar items via Priority Mail.
Does USPS include free packing tape?
Yes — Priority Mail-branded 2-inch packing tape is free at store.usps.com. Works for any USPS shipment.
Can I order USPS boxes from outside the US?
USPS boxes can be ordered with delivery to US addresses only. International senders typically buy USPS-equivalent boxes locally or use USPS Priority Mail International packaging from their local USPS.
What if my Post Office is out of the box I need?
Order online at store.usps.com or check other Post Offices nearby. Inventory is location-specific; some locations carry the size you need even if your local one doesn't.