USPS International Shipping: Services, Rules & Costs

USPS offers five international shipping services — Priority Mail Express International, Priority Mail International, Priority Mail International Flat Rate, First-Class Package International Service, and First-Class Mail International — serving 180+ countries. Rates start around $19 for lightweight packages and climb to $65+ for express delivery. Every shipment requires an electronically generated customs form, and recipients in most countries now owe import duties on all packages regardless of value after the U.S. suspended de minimis treatment globally in August 2025.

In This Article

• USPS International Shipping Services: 2026 Comparison
• Priority Mail Express International
• Priority Mail International
• First-Class Package International Service
• First-Class Mail International
• How to Choose the Right Service
• What Your Customers Will Pay: Duties and Taxes
• Customs Documentation in 2026: What Every Shipper Needs to Know
• USPS International Shipping Rules and Restrictions
• How to Save on USPS International Shipping with Shippo
• Frequently Asked Questions

If you ship internationally, 2025 and 2026 changed more rules in one stretch than any year since the pandemic. Six-digit HS codes became mandatory on commercial shipments. The U.S. suspended the $800 duty-free de minimis exemption — first for China and Hong Kong, then globally. A new USPS Delivered Duty Paid service launched in January 2026. The EU abolished its €150 customs duty exemption as of July 1, 2026. This guide covers what’s current — services, rates, paperwork, and how to stay out of trouble at customs.

USPS International Shipping Services: 2026 Comparison

Before diving into each service, here’s how they stack up:

Rates reflect January 18, 2026 USPS rate schedule. Commercial rates through platforms like Shippo are lower.

Priority Mail Express International

Priority Mail Express International (PMEI) is USPS’s fastest international option and the one that actually comes with real guarantees. Deliveries reach roughly 180 countries in 3–5 business days — and for select destinations, USPS backs that with a money-back guarantee if the delivery date slips.

What’s included:
USPS Tracking on every shipment
$200 in insurance for merchandise (loss, damage, or missing contents); $100 for non-negotiable document reconstruction
Free Package Pickup
Flat Rate Envelope option (no weight-based calculation for lighter loads)

Parcel specs:
Maximum weight: 70 lbs for packages; 4 lbs for Flat Rate Envelopes
Maximum combined length and girth: 108 inches
Must use USPS-approved packaging; container flaps must close normally

2026 retail rates:
Flat Rate Envelope (12.5” x 9.5”): $62.70
By weight: starting at $64.25 (varies by destination country price group)
Commercial base (e.g., via Shippo): lower — see the Shippo section below

Money-back guarantee caveat: The guarantee applies to 14 countries listed in IMM Section 221.2: Australia, Canada, China, France, Hong Kong, Israel, Japan, New Zealand, Republic of Korea, Singapore, Spain, Sweden, Switzerland, and Thailand. The United Kingdom is not currently on the list. Verify destination guarantee eligibility at pe.usps.com before making a delivery date promise to your customer.

Best for: Time-sensitive shipments where delivery certainty matters more than cost.

Priority Mail International

Priority Mail International (PMI) covers the same 180+ countries as PMEI at a meaningfully lower price. The trade-off is a longer delivery window — 6–10 business days — and no money-back guarantee if the timeline stretches.

What’s included:
$200 in insurance for merchandise; $100 for documents
USPS Tracking — with one important exception (see below)
Free Package Pickup may apply

Parcel specs:
Maximum weight: 70 lbs (some countries have lower limits)
Flat Rate Envelopes: 4 lbs max
Medium and Large Flat Rate Boxes: 20 lbs max

Tracking caveat: PMI Flat Rate Envelopes and Small Flat Rate Boxes do not include USPS Tracking. For e-commerce, that’s almost always a problem. Stick with Medium or Large Flat Rate Boxes, or use weight-based PMI if tracking matters to your customers — and it usually does.

2026 retail rates:
Flat Rate Envelope: $32.65
Small Flat Rate Box: $33.75
Medium Flat Rate Box: $61.80
Large Flat Rate Box: $75.15
By weight: starting at $43.55

Best for: Packages that don’t need guaranteed delivery windows; sellers who want solid coverage and tracking at a more manageable price than PMEI.

Flat-Rate Pricing Under PMI

Both PMI and PMEI offer flat-rate pricing on USPS-supplied envelopes and boxes — one fixed rate regardless of weight, up to the weight limit. For small, heavy items like jewelry components, metal parts, or dense supplements, flat-rate pricing often beats weight-based pricing. For light, bulky items, the math usually tips the other way.

To decide: calculate both options for your typical product. Fill a flat rate box close to its weight limit, and flat rate wins. Leave most of it as air, and weight-based is probably cheaper.

First-Class Package International Service

First-Class Package International Service (FCPIS) is USPS’s most affordable option for small packages, and for lightweight e-commerce orders, the price is hard to argue with. The catch is that FCPIS caps out at 4 lbs and $400 in declared value — high-value or heavier shipments need to move up a tier.

Important note: There’s a persistent misconception that USPS discontinued FCPIS when it launched Ground Advantage in 2023. That change only affected domestic shipping — Ground Advantage replaced First-Class Package Service for packages moving within the U.S. FCPIS is a separate international service and remains fully active.

What’s included:
Electronic USPS Delivery Confirmation International (E-USPS DELCON INTL) — available to select countries, including Australia, Canada, UK, Germany, France, and Japan. Outside that list, tracking ends when the package leaves the U.S. postal network. Check the current tracking-eligible country list at pe.usps.com.
No insurance included. Additional coverage is available via Registered Mail Service (not combinable with electronic confirmation) or through a third-party insurer.

Parcel specs:
Maximum weight: 4 lbs (64 oz)
Maximum declared value: $400
Maximum length: 24 inches
Maximum combined length + height + depth: 36 inches (rolls/tubes: 42 inches max length + twice diameter)
Minimum length: 6 inches; minimum height: 4 inches

2026 retail rates: Starting at $19.40 (varies by weight and destination country)

Best for: Lightweight packages (under 4 lbs) to tracking-eligible destinations where price takes priority over speed; a solid fit for low-value goods where the absence of built-in insurance isn’t a concern.

First-Class Mail International

First-Class Mail International (FCMI) handles letters, postcards, and large envelopes — not packages. When you’re mailing documents, business correspondence, or flat printed materials abroad, this is the right call.

What it covers:
Letters and postcards: up to 3.5 oz
Large envelopes (flats): up to 15.994 oz
Must contain only correspondence or non-negotiable documents — no merchandise of any kind

What it doesn’t include:
Tracking (Registered Mail is available as an add-on to most countries)
Insurance
Any goods or samples

2026 rate: Global Forever stamp: $1.70 per stamp (covers 1-oz letters or postcards to any country; the stamp price is locked in regardless of future rate increases)

Best for: Invoices, documents, letters, and flat printed materials. Not useful for e-commerce product shipments.

How to Choose the Right Service

What Your Customers Will Pay: Duties and Taxes

This is the section that catches merchants off guard most often in 2026.

The U.S. de minimis rule changed significantly in 2025–2026. Previously, the U.S. allowed imports up to $800 in value to enter duty-free under Section 321. That changed in two steps:

Executive Order 14256 (signed April 2, 2025) eliminated duty-free de minimis treatment for goods from China and Hong Kong, effective May 2, 2025.

Executive Order 14324 (signed July 30, 2025) suspended de minimis treatment globally — for all countries, not just China — effective August 29, 2025. A continuation executive order signed February 20, 2026 explicitly maintained the global suspension, which remains in effect as of mid-2026.

For U.S. outbound sellers, the practical impact is clear: your customers in many countries will now be charged import duties and taxes on packages they receive — potentially on orders where they wouldn’t have owed anything in prior years. Common thresholds to know for outbound shipments from the U.S.:

• EU countries: The EU abolished its €150 customs duty exemption effective July 1, 2026. Under EU Council Regulation (EU) 2026/382, a flat €3 customs duty per item now applies on all goods valued up to €150 (until July 2028, when standard ad valorem rates take over). VAT already applies on all EU orders above €0 — the old €22 VAT exemption was abolished in 2021.
• Canada: CAD $20 de minimis for postal (USPS) shipments — below that, no duty or GST/HST is collected. Note this threshold applies to postal mail only; courier shipments from the U.S. carry higher thresholds under CUSMA.
• UK: £135 goods value threshold for customs duty. The UK government is consulting on removing this threshold, likely by 2029 — check gov.uk for updates. VAT rules differ and apply separately.
• Australia: AUD $1,000 is the threshold at which GST collection shifts from the seller to the border. GST (10%) applies on all orders regardless of value — for goods sold below AUD $1,000, overseas sellers are required to register for Australian GST and collect it at checkout.

When a customer isn’t expecting a duty bill and one shows up, the package gets refused or returned — and your reputation takes the hit.

Two options to handle this:

1. Ship DDU (Delivered Duty Unpaid): The default for all USPS international services. Customs charges are collected from the recipient at delivery. If they refuse to pay, the package is returned or abandoned.
2. USPS Delivered Duty Paid (DDP): Launched January 18, 2026 (Federal Register notice). Allows U.S. senders to prepay import duties, taxes, and fees at the time of mailing — so the recipient gets the package with no surprise charges at the door. Currently available for Canada, UK, and Germany via PMEI, PMI, and FCPIS. Access through Click-N-Ship, USPS APIs, or USPS Global Shipping Software (GSS). Note: USPS DDP is not currently available through Shippo — you’d need to access it via USPS directly.

At minimum, set expectations with your customers: tell international shoppers clearly that duties and taxes may apply at delivery, and that your declared value on the customs form will be accurate. Undervaluing shipments to help customers dodge duties is illegal, and it can result in shipment seizure, fines, and carrier account termination.

Customs Documentation in 2026: What Every Shipper Needs to Know

Customs requirements tightened significantly in 2025. Two changes in particular affect every merchant shipping internationally through USPS.

Electronic-Only Customs Forms

USPS customs declarations must be electronically generated — through Click-N-Ship, USPS Customs Form Online, or an approved shipping platform. Handwritten customs forms are not accepted. USPS updated and clarified these electronic customs form standards in a Postal Bulletin effective July 13, 2025, codifying requirements across both domestic and international mail standards.

Which form does your shipment need?
PS Form 2976 (CN 22): For packages with a declared value of $400 or less
PS Form 2976-A (CP 72): For commercial shipments and higher-value packages. Note: the 2976-A is also acceptable for shipments that would normally only require a 2976 — so if you want to use one form consistently, default to the 2976-A.

Shipping software like Shippo generates and files these forms automatically, including Paperless Trade (electronic submission) for qualifying shipments, so no physical customs form attachment is required.

Six-Digit HS Codes Required on Commercial Shipments (Effective September 1, 2025)

Harmonized System (HS) codes are the international language of customs — a standardized 6-digit product classification number that destination country customs agencies use to assess duties. As of September 1, 2025, USPS requires a six-digit HS code on all commercial international shipments, aligning with Universal Postal Union (UPU) requirements effective the same date globally.

What this means in practice:
Every product you ship internationally needs an HS code on the customs declaration
The code must match the actual product — getting it wrong can mean shipment holds, recalculated duties, or outright rejection
Look up HS codes at hts.usitc.gov or through your shipping platform
Shippo supports HS code entry on international customs declarations

Description quality matters. Customs agencies worldwide have cracked down on vague item descriptions. “Electronics” gets flagged. “Women’s cotton t-shirt, navy, size M, 100% cotton” gets processed. USPS itself calls out the need for more detailed item descriptions on every international service page.

USPS International Shipping Rules and Restrictions

Prohibited and Restricted Items

USPS IMM Section 136 identifies items that are nonmailable in all international mail regardless of destination. These include: ammunition and explosive devices, cigarettes and tobacco products, dry ice, controlled substances and poisons, marijuana, and counterfeit goods.

Several other items — including aerosols, alcohol-based perfumes, nail polish, and flammable liquids — are classified as dangerous goods under IMM Section 135 and may be mailable under specific conditions (proper packaging, surface transport, limited quantities) or restricted only to certain destination countries. Beverage alcohol and hemp/CBD products are likewise subject to country-specific rules rather than a blanket global ban. Check the USPS Index of Countries and Localities for destination-specific rules before shipping these items.

In June 2024, USPS reinforced a specific prohibition on mercury — covering liquid mercury in thermometers and barometers, plus mercury vapor in compact fluorescent bulbs and other devices. The reach of that rule is broader than most shippers realize.

Sanctioned Countries

USPS IMM Section 512 prohibits mail service to countries sanctioned by the Office of Foreign Assets Control (OFAC). As of 2026, this covers Cuba, Iran, North Korea, and the Crimea, Donetsk, and Luhansk regions of Ukraine.

The current USPS transportation suspension list is longer and changes without notice. As of May 2026, USPS has suspended all service to: Afghanistan, Belarus, Bhutan, Cuba, Eritrea, Haiti, Iran, Kuwait, Niue (PMEI only), Seychelles, South Sudan, Sudan, Turkmenistan, and Yemen. Always check USPS International Service Alerts before opening any new international shipping lane.

Country-Specific Restrictions

Items that ship freely within the U.S. may be prohibited or restricted in specific destination countries. The USPS Index of Countries and Localities is the authoritative source. Check it before shipping a new product category to a new country — regulations vary widely, and surprises here are expensive.

How to Save on USPS International Shipping with Shippo

Shipping internationally involves enough moving parts — figuring out customs forms, HS codes, duties — that having the right tools matters as much as having the right rates. Shippo gives you access to discounted rates on USPS Priority Mail Express International, Priority Mail International, and First-Class Package International Service, and handles most of the paperwork automatically.

2026 Shippo commercial rates (2 lbs, pulled April 29, 2026):

Rates vary by origin, destination, weight, and dimensions. These reflect commercial rates via Shippo as of April 2026.

What Shippo handles automatically for international shipments:

• Pre-filled customs forms — For orders synced from your store (Shopify, eBay, Etsy, WooCommerce, and others), customs item details are pre-populated from your order line items. No manual re-entry.
• Paperless Trade — For qualifying shipments, Shippo submits your customs declaration electronically, eliminating the paper pouch attachment requirement.
• HS code support — Enter Harmonized System codes directly on your customs declaration in Shippo.
• Tax ID / VAT / IOSS / EORI fields — Available for sellers registered in destination country tax systems.
• Rate comparison across carriers — Compare USPS international rates alongside DHL Express, FedEx, and UPS for every shipment. The carrier and service that wins on price shifts significantly by weight, destination, and speed tier — seeing all options at once is the fastest way to stop overpaying.
• Shippo Total Protection powered by XCover — FCPIS and FCMI include no insurance. For any package worth protecting, Shippo’s shipping insurance covers loss and damage at 1.50 percent of declared value for international shipments (1.25 percent for domestic).

One limitation to know up front: USPS international shipments through Shippo are DDU (Delivered Duty Unpaid) — the USPS DDP service (prepaid duties) is not currently available through Shippo. For Canada, UK, and Germany shipments where you want to offer DDP, access it directly via USPS Click-N-Ship.

Get started with Shippo for free — no monthly fee, no minimum label volume.

Frequently Asked Questions

How long does USPS international shipping take?
The timeline depends on the service. Priority Mail Express International delivers in 3–5 business days to most destinations. Priority Mail International typically takes 6–10 business days. First-Class Package International Service has no published delivery window — transit typically runs 2–5 weeks depending on destination and customs clearance. These are guidelines, not guarantees; actual delivery times vary by country, season, and customs processing.

How much does USPS international shipping cost?
Starting rates for 2026: FCPIS from $19.40 (retail), Priority Mail International from $43.55, Priority Mail Express International from $62.70 (flat rate envelope) or $64.25+ by weight. Commercial rates through shipping platforms like Shippo are lower — a 2-lb package to Canada, for example, runs $27.65 (FCPIS), $45.51 (PMI), or $68.92 (PMEI) at Shippo commercial rates.

Does USPS ship to all countries?
USPS ships to 180+ countries, but not all. Countries under OFAC sanctions (Cuba, Iran, North Korea, and the Crimea/Donetsk/Luhansk regions of Ukraine) cannot receive USPS mail. Additional countries are suspended periodically due to transportation unavailability — the current list as of May 2026 includes Afghanistan, Belarus, Eritrea, Haiti, Kuwait, South Sudan, Sudan, Turkmenistan, and Yemen, among others. Check USPS’s international service alerts before shipping to any new country.

Does USPS First-Class Package International Service include tracking?
Partially. FCPIS includes Electronic USPS Delivery Confirmation International to select countries — including Australia, Canada, Germany, Japan, and the UK — but not everywhere. Outside that list, tracking ends when the package leaves the U.S. network. Check the current country list at pe.usps.com before relying on FCPIS tracking for a new destination. For full end-to-end tracking on any international shipment, use Priority Mail International or Priority Mail Express International.

What customs form do I need for USPS international shipments?
For packages valued at $400 or less: PS Form 2976 (CN 22). For commercial shipments or higher values: PS Form 2976-A (CP 72). The 2976-A is always acceptable in place of the 2976 if you want to use one form consistently. All customs forms must be electronically generated — handwritten forms are not accepted.

Are HS codes required on USPS international shipments?
Yes. As of September 1, 2025, six-digit Harmonized System (HS) codes are required on all commercial international USPS shipments. Look up HS codes for your products at hts.usitc.gov. Shipments missing valid HS codes risk customs delays or rejection at destination.

Will my customers have to pay duties or taxes?
Likely yes, depending on the destination country. The U.S. suspended de minimis treatment globally as of August 2025. Most destination countries also have their own import duty thresholds. EU countries now apply a flat €3/item customs duty on all goods valued up to €150 (as of July 1, 2026), plus VAT on all orders; the UK’s customs duty threshold is £135; Australia requires sellers to collect 10% GST on all goods up to AUD $1,000; Canada’s postal de minimis is CAD $20. All USPS international shipments through Shippo are DDU (Delivered Duty Unpaid), meaning the recipient owes any applicable charges at delivery. Tell your international customers upfront.

Does USPS Priority Mail Express International come with a money-back guarantee?
Only to select destinations. USPS currently offers the money-back guarantee for PMEI to 14 countries: Australia, Canada, China, France, Hong Kong, Israel, Japan, New Zealand, Republic of Korea, Singapore, Spain, Sweden, Switzerland, and Thailand. The United Kingdom is not currently on the guarantee list. Verify current guarantee eligibility before promising your customer a delivery date.

Can I ship alcohol, CBD, or dry ice internationally via USPS?
It depends on the item and destination. Dry ice, controlled substances, and marijuana are universally prohibited in USPS international mail under IMM Section 136. Beverage alcohol and hemp/CBD products are subject to destination country rules — prohibited in many countries but not universally banned. Check the USPS Index of Countries and Localities for your specific destination before shipping these categories.

What is USPS Delivered Duty Paid?
A service launched January 18, 2026 that lets U.S. senders prepay import duties, taxes, and fees for the recipient at the time of mailing. The recipient gets the package with no surprise charges at delivery. Currently available to Canada, UK, and Germany via Priority Mail Express International, Priority Mail International, and First-Class Package International Service — accessible through Click-N-Ship, USPS APIs, and USPS retail locations.

Is USPS First-Class Package International Service discontinued?
No. USPS discontinued First-Class Package Service (domestic) in 2023, replacing it with Ground Advantage. First-Class Package International Service (FCPIS) is a separate service and remains fully active for international shipments.