USPS China shipping cost guide for mail and packages from the U.S.
Quick answer on USPS shipping costs to China
For mail sent from the United States to mainland China, USPS China shipping cost is mainly driven by the service selected, the item weight, the mail shape, and whether the contents are documents or merchandise. Based on USPS Notice 123 prices effective October 4, 2026, a 1 oz letter or postcard to China starts at $1.75, a 1 oz large envelope starts at $3.30, and a First-Class Package International Service retail package to China starts at $22.40 for up to 8 oz. Priority Mail International to China starts at $49.75 for a Flat Rate Envelope, $51.40 for a Small Flat Rate Box, or $65.20 for a 1 lb package priced by weight. Priority Mail Express International starts at $74.60 for a 0.5 lb shipment to China or $79.80 for a Flat Rate Envelope.
These figures are USPS retail postage examples. They are not a complete landed-cost estimate. China customs duties, taxes, documentation requirements, insurance, commercial discounts, and service disruptions can all change the amount a sender or recipient ultimately pays.
How USPS prices shipments to China
USPS does not apply one flat rate to every shipment bound for China. It first classifies the mailing by service and mail shape, then applies the destination price group published in USPS Notice 123 and the International Mail Manual. For China, the main retail group assignments are: Priority Mail Express International price group 14, Priority Mail International price group 14, First-Class Mail International price group 3, and First-Class Package International Service price group 14.
That classification matters. Two items going to the same city in China can have very different postage. A thin document in a large envelope uses First-Class Mail International pricing. A small merchandise parcel under 4 lb may fit First-Class Package International Service. A heavier box, or a shipment that needs fuller tracking and included insurance, may be better suited to Priority Mail International. A time-sensitive shipment may require Priority Mail Express International.
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USPS China shipping cost by service
The table below summarizes common USPS retail options for sending mail and packages from the U.S. to China. Use the rates as planning examples, not as a final label quote. Exact pricing should be checked at the time of mailing because USPS may update rates, and the package must meet the size, value, and content rules for the selected service.
| USPS service | Best for | China price group | Current retail cost examples | Important limits |
|---|---|---|---|---|
| First-Class Mail International | Postcards, letters, and document flats | Group 3 for China | 1 oz letter or postcard $1.75; 1 oz flat $3.30; 15.994 oz flat $18.55 | Letters up to 3.5 oz; large envelopes up to 15.994 oz; merchandise should not be treated as a document flat |
| First-Class Package International Service | Lightweight merchandise under 4 lb | Group 14 for China | Up to 8 oz $22.40; 9-16 oz $32.05; 17-32 oz $35.15; 33-48 oz $48.80; 49-64 oz $66.70 | Maximum 4 lb and merchandise value up to $400; delivery time varies by destination |
| Priority Mail International | Boxes, samples, gifts, and shipments needing more tracking | Group 14 for weight-based parcels; flat rate group 3 | Flat Rate Envelope $49.75; Small Flat Rate Box $51.40; 1 lb by weight $65.20; 4 lb by weight $80.25 | Weight-based parcels to China up to 66 lb; Flat Rate Envelopes and Small Flat Rate Boxes up to 4 lb; Medium and Large Flat Rate Boxes up to 20 lb |
| Priority Mail Express International | Urgent documents or parcels | Group 14 for weight-based parcels; flat rate group 3 | 0.5 lb by weight $74.60; 1 lb $76.75; 2 lb $84.15; Flat Rate Envelope $79.80 | China weight limit is 66 lb; Flat Rate Envelope maximum is 4 lb; restrictions apply to valuables and prohibited goods |
Which USPS option is usually the right fit?
Documents and paperwork
If the shipment is only a letter, contract, certificate copy, brochure, or another document that qualifies as First-Class Mail International, this is usually the lowest-cost USPS route. A simple 1 oz letter to China costs far less than a parcel because it travels under document mail rules. Once the piece is rigid, uneven, contains merchandise, or fails the flat-size requirements, USPS can charge it as a package rather than as a large envelope.
Small merchandise under 4 lb
For low-value lightweight goods, First-Class Package International Service is often the lowest postage option. For China, the retail rate is $22.40 up to 8 oz, $32.05 from 9 to 16 oz, and $66.70 at the 4 lb ceiling. This service can work for small replacement parts, accessories, samples, and personal gifts when the value stays within the service limit.
The tradeoff is service depth. USPS states that First-Class Package International Service delivery varies by destination and that Electronic USPS Delivery Confirmation International is available only to select destinations. If tracking certainty is important for a customer shipment, Priority Mail International may be the safer choice even when the postage is higher.
Heavier packages and commercial samples
Priority Mail International becomes more attractive when the shipment is heavier, when a flat-rate package fits, or when the sender wants USPS Tracking and included insurance. The Small Flat Rate Box to China is $51.40 with a 4 lb maximum. That can be cheaper than the $66.70 First-Class Package International Service rate for a 4 lb parcel, provided the item fits the box and meets all service rules. For a 1 lb box that does not fit flat-rate packaging, the retail weight-based price to China is $65.20.
Urgent shipments
Priority Mail Express International is the higher-cost USPS option for faster delivery. USPS describes the service as a 3-5 business day international option to many destinations, with availability and guarantee rules varying by country. For China, the retail examples are $74.60 for a 0.5 lb shipment and $76.75 for 1 lb. The Flat Rate Envelope is $79.80, so very light shipments may cost less by weight than by flat rate.
Costs that are not included in USPS postage
USPS postage covers the transportation and postal service charge. It does not automatically include China import duty, value-added tax, customs brokerage requirements, storage charges caused by recipient delay, or replacement costs if the item is rejected. The USPS country conditions for China state that personal-use items can be subject to duty and tax, and that items above allowed value limits may be returned, handled under commercial customs procedures, or require supporting documents.
For each goods shipment to China, the customs declaration should include a clear and specific content description, value, quantity, country of origin where required, and the recipient phone number. USPS country conditions specifically note that a mobile number is preferred because it helps China customs and China Post contact the recipient about duties, taxes, and delivery arrangements. See also: Compliance.
Some goods are prohibited or restricted. The China country conditions list many examples, including arms, ammunition, Chinese currency, certain precious items unless properly insured, fresh fruits and vegetables, many animal-derived products, radioactive materials, soil, seeds, used clothing and bedding, and items that may violate China import controls. Items containing powders, liquids, lithium batteries, or lithium cells may also face domestic air transport limits inside China, which can delay forwarding after arrival.
Retail rates, online rates, and commercial shipping accounts
The prices in this guide are retail examples from USPS published price tables. If a shipper buys postage through USPS online tools or an approved postage vendor, the available price may differ from the Post Office retail counter price. Businesses with higher volume may also compare USPS with postal consolidators, express couriers, and freight forwarders.
The cheapest postage is not always the lowest-risk option. A low-cost parcel rate can become expensive if the item is returned, if the recipient cannot clear customs, or if tracking is insufficient for a marketplace claim. Export sellers should compare postage, packaging, customs compliance time, expected delivery speed, proof of mailing, tracking visibility, insurance coverage, and the customer-service cost of a delayed parcel.
China-to-U.S. shipments are a different cost question
Many people search for USPS and China shipping costs because they are receiving goods from China. That is a different pricing issue. USPS generally handles the U.S. domestic delivery leg after mail enters the U.S. postal network, but the shipping price paid by the buyer or seller in China is usually set by China Post, a platform logistics program, a consolidator, or an express courier. It is not the same as buying a USPS label in the United States for a parcel addressed to China.
U.S. import rules can also affect inbound mail costs. In 2026, CBP guidance described changes to the treatment of low-value merchandise arriving through the international postal network and the postal informal entry process. For importers, a low seller shipping charge from China does not necessarily represent the total landed cost after duties, taxes, documentation, and delivery handling.
How to estimate the right USPS cost before mailing
- Confirm whether the item is a document, flat, or package.
- Weigh the packed item after adding cushioning, tape, labels, and customs forms.
- Measure the parcel and confirm it fits the USPS service size limits.
- Check whether the contents are prohibited, restricted, hazardous, or subject to China import controls.
- Compare First-Class Package International Service, Priority Mail International by weight, and Priority Mail International flat rate packaging.
- Decide whether tracking and included insurance are important enough to justify a higher service level.
- Add potential customs duties, taxes, and recipient-side clearance costs to the decision, even though they are not USPS postage.
Frequently asked questions
What is the cheapest USPS way to ship a package to China?
For merchandise packages, First-Class Package International Service is often the cheapest USPS retail option if the parcel is under 4 lb and valued at no more than $400. The China retail rate starts at $22.40 for up to 8 oz. For a 4 lb shipment, compare it with Priority Mail International flat-rate packaging because a Small Flat Rate Box may be cheaper if the item fits.
How much does a 1 lb USPS package to China cost?
A 1 lb First-Class Package International Service parcel to China falls in the 9-16 oz band at $32.05 retail. A 1 lb Priority Mail International parcel by weight is $65.20 retail. Priority Mail Express International for 1 lb is $76.75 retail. The right choice depends on tracking, speed, value, and customs risk.
Does USPS shipping to China include customs duties?
No. USPS postage does not automatically include China customs duties or taxes. The recipient may need to provide information or pay charges before delivery. China country conditions also include value limits, documentation requirements, and product restrictions that can affect clearance.
Is Priority Mail International better than First-Class Package International Service for China?
It can be better when tracking, included insurance, heavier weight, or flat-rate packaging matters. First-Class Package International Service is usually more economical for light, low-value parcels, but Priority Mail International is often more suitable for commercial samples, higher-value goods, and shipments where proof of movement is important.
Can USPS ship from China to the United States?
USPS does not sell China-origin postage in China. For China-to-U.S. parcels, the sender usually pays China Post, a marketplace logistics service, a consolidator, or a courier. USPS may perform the final U.S. delivery after the parcel enters the postal network, but that is different from USPS retail postage from the U.S. to China.
