How to ship to Singapore with USPS as a reseller

A small package of goods to Singapore, up to 4 lb and $400, goes by First-Class Package International Service: $21.18 for up to 8 oz with a label from a USPS-approved PC Postage provider, or $22.25 at the Post Office or through Click-N-Ship. From 49 oz, a Priority Mail International Flat Rate Envelope costs less if the item fits: $48.12 online, against $57.07 by First-Class Package International, though USPS offers no tracking on Flat Rate Envelopes. Heavier or pricier packages go by Priority Mail International, up to 66 lb, from $64.11 for 1 lb online, and every package of goods needs an electronic customs form with a 6-digit HS code for each item. The country's own rules to watch: jewelry and most coins banned.

Rules quoted from Singapore's Individual Country Listing in USPS's International Mail Manual, read Oct 19, 2026. Prices from Notice 123 effective Oct 4, 2026; package prices are unchanged since the Jan 18, 2026 edition.

Rates verified on Oct 19, 2026

First-Class Package International, up to 8 oz, online: $21.18
Priority Mail International, 1 lb, online: $64.11
Heaviest package (Priority Mail International): 66 lb
Prepaid duties (USPS DDP): Not available

What you can and can't send to Singapore

Goods on a country's prohibited list can't be mailed there, and a country can return or seize mail that breaks its rules even if USPS never published them (IMM 131.32-131.33). Here is what Singapore's listing says about the goods resellers ship most, quoted from it, next to USPS's rule for every country where there is one. Other items on Singapore's lists include lottery material.

Books, magazines and other printed matter

“Advertisements for charms, amulets and talismans.” (IMM Singapore listing, Prohibitions)

Every country: USPS treats books as goods, not documents: they need a customs form with a value (IMM 123.623). There is no Media Mail abroad: USPS's five international mail categories don't include it (IMM 141.1), so books pay the same package prices as other goods. Airmail M-bags, a sack of printed matter to one address, are open to Singapore (IMM 261.21).

CDs, DVDs, records and film

Nothing on Singapore's lists.

Every country: CDs, DVDs and other recorded or blank media always need a customs form and a value; USPS never counts them as documents (IMM 123.622-123.623).

Cosmetics, perfume and aerosols

Nothing on Singapore's lists.

Every country: USPS lists aerosols, nail polish, perfumes containing alcohol and hemp-based (CBD) products among items that can't be sent to any country (USPS international restrictions). Dangerous goods, such as flammable materials and compressed gases, are banned in all international mail (IMM 136.1).

Electronics and batteries

Nothing on Singapore's lists.

Every country: Only new lithium batteries installed in the device they run, at most four cells or two batteries per package and 100 Wh per lithium-ion battery; no spare batteries, and no used, damaged or defective devices with lithium batteries unless manufacturer-certified refurbished. The outside of the package must not carry lithium battery marks or labels (IMM 135.62-135.64).

Jewelry, watches, coins and precious metals

“Coins except coins for purposes of ornament; banknotes; currency notes; traveler’s checks; securities payable to bearer; precious stones; jewelry; and other valuable articles.” (IMM Singapore listing, Prohibitions)
“Bullion of a value higher than $50 Singapore dollars” (IMM Singapore listing, Prohibitions)

Every country: Valuables can't go by Priority Mail Express International; inexpensive costume jewelry with little precious metal ships like any other merchandise, and USPS says it “is accepted to countries that prohibit jewelry, but only at the sender’s risk” (IMM 134.2).

Knives, replica weapons and toy guns

“Arms and firearms and parts thereof.” (IMM Singapore listing, Prohibitions)

Every country: USPS says some knives and sharp instruments may be mailed to certain countries, under the conditions in each country's listing (IMM 137). Inert or replica grenades and military ordnance are banned to every country (IMM 136.2).

Brand-name, copyrighted and origin-marked goods

Nothing on Singapore's lists.

Every country: Counterfeit or pirated goods are prohibited to every country (IMM 136.3).

Food, supplements, medicines and health items

“Meat or meat products including animal by-products require an import permit issued by Director of Primary Production, Singapore, and these articles must be addressed to the addressee care of the above Director.” (IMM Singapore listing, Restrictions)

Tobacco, vapes and lighters

“Butane gas lighters and refills therefor.” (IMM Singapore listing, Prohibitions)

Every country: Cigarettes, smokeless tobacco and e-cigarettes can't be mailed abroad at all, whatever a listing says (IMM 136.4).

There is nothing on Singapore's lists about clothing or shoes, about toys or playing cards or about antiques and collectibles.

USPS says the burden is on the mailer to follow every country's rules, whatever a USPS employee says (IMM 131.4). The full lists: Singapore in the IMM.

USPS services to Singapore and their limits

From Singapore's IMM listing (weight, size, insurance, M-bags, DDP) and Notice 123 effective Oct 4, 2026 (price groups). Global Express Guaranteed has been suspended since Sep 29, 2024.
Service	Price group	Weight limit	Size limit	Good to know
First-Class Package International Service	10	4 lb	24 in. long; length + height + thickness 36 in.	Value up to $400. Free electronic delivery confirmation to this country (IMM 252.22). No insurance. Customs form: PS Form 2976.
Priority Mail International	6	66 lb; Flat Rate Envelope and Small Box 4 lb, Medium and Large Box 20 lb	42 in. long; length + girth 79 in.	6-10 business days to many major markets (USPS). Tracking included, except on Flat Rate Envelopes and Small Flat Rate Boxes (USPS). Insurance: $200 included for merchandise; more can be bought up to $3,000. Customs form: PS Form 2976-A.
Priority Mail Express International	6	66 lb	36 in. long; length + girth 79 in.	Serves all of Singapore, including Sentosa Island, but excluding all other offshore islands. The listing offers a money-back guarantee, but USPS has suspended it (service alerts). No coins, jewelry, watches or other valuables. Customs form: PS Form 2976-B.
First-Class Mail International	6	3.5 oz letters; 15.994 oz large envelopes	Letter and flat sizes	Documents and correspondence only: no merchandise of any kind (IMM 242.2).
Airmail M-bag	6	66 lb	One sack	Printed matter (books, magazines, catalogs) to one address; $133.43 up to 11 lb, then $12.13 a lb.

Online prices need PC Postage. Commercial Base prices are for labels from a USPS-approved PC Postage product, “with the exception of Click-N-Ship service”, so Click-N-Ship labels pay the retail price for Priority Mail International and First-Class Package International alike (IMM 233.231, 252.25, 253.231).
Valuables: coins, precious metals, jewelry and watches can't go by Priority Mail Express International, and Registered Mail isn't offered for First-Class Package International Service or Priority Mail International (IMM 134, 332). Singapore's own rule is under jewelry above.
Service alerts: USPS's international service alerts (updated Oct 2, 2026, checked Oct 19, 2026) don't list Singapore among the 13 destinations where mail acceptance is suspended. The same page says that, effective Oct 25, 2021, “due to airline travel restrictions and cancellations,” USPS suspended the Priority Mail Express International guarantee to Singapore. Check it before a big shipment.

USPS prices to Singapore

"Online" is USPS's Commercial Base price, for labels from a USPS-approved PC Postage provider. "Post Office" is the retail price, which Click-N-Ship also charges: USPS lists retail Flat Rate prices “at Post Office & Online” (USPS, IMM 233.231). Commercial Plus prices are the same as Commercial Base in this edition. First-Class Package International weights round up to the next ounce (IMM 253.12), so an 8.2 oz package pays the 9-16 oz price.

First-Class Package International Service, price group 10. Notice 123 effective Oct 4, 2026. Online saves $1.07 to $11.58.
Weight	Post Office	Online
1-8 oz	$22.25	$21.18
9-16 oz	$31.15	$29.60
17-32 oz (up to 2 lb)	$34.80	$33.15
33-48 oz (up to 3 lb)	$50.15	$47.65
49-64 oz (up to 4 lb)	$68.65	$57.07

Priority Mail International by weight, price group 6, weight not over. Notice 123 effective Oct 4, 2026.
Weight	Post Office	Online
1 lb	$66.25	$64.11
2 lb	$71.95	$69.61
3 lb	$77.55	$75.04
4 lb	$83.20	$80.52
5 lb	$89.45	$86.55
10 lb	$126.10	$121.99
20 lb	$199.15	$192.69
30 lb	$256.20	$247.89
44 lb	$322.05	$311.61
66 lb	$452.15	$437.48

Priority Mail International Flat Rate, Flat Rate price group 3. USPS's own Flat Rate packaging only; every envelope or box named in a row costs the same, and USPS suggests the padded envelope for clothing, books and boxed jewelry (USPS). Notice 123 effective Oct 4, 2026.
Packaging	Up to	Post Office	Online
Flat Rate Envelope: regular, padded, legal, window or small	4 lb	$49.75	$48.12
Small Flat Rate Box (also the DVD and Large Video boxes)	4 lb	$51.40	$49.72
Medium Flat Rate Box (top- or side-loading)	20 lb	$96.40	$92.81
Large Flat Rate Box (also the Board Game box)	20 lb	$121.30	$116.77

Three packages, priced

A paperback in a padded mailer, 14 oz: First-Class Package International Service $29.60; Priority Mail International by weight (1 lb) $64.11; Priority Mail International Padded Flat Rate Envelope $48.12. Cheapest: First-Class Package International Service, $29.60 online.
Jeans and a sweater, 2 lb 8 oz: First-Class Package International Service $47.65; Priority Mail International by weight (3 lb) $75.04; Priority Mail International Medium Flat Rate Box $92.81. Cheapest: First-Class Package International Service, $47.65, as long as the value is $400 or less.
Six hardcovers, 9 lb: too heavy for First-Class Package International. Priority Mail International by weight (9 lb) $114.85; Priority Mail International Medium Flat Rate Box (if they fit) $92.81; Airmail M-bag (printed matter only, priced from 11 lb) (Post Office counter) $133.43. Cheapest: Priority Mail International Medium Flat Rate Box, $92.81.

Online prices, except the M-bag. Selling platforms and label services can charge their own rates. Domestic rates: postage calculator.

Customs form, HS codes and value

Which form: PS Form 2976 for First-Class Package International Service (up to $400), PS Form 2976-A in a 2976-E envelope for Priority Mail International, PS Form 2976-B for Priority Mail Express International. All must be printed electronically, by your label software, Click-N-Ship, Customs Form Online or the Post Office counter; hand-filled forms with a barcode are obsolete (IMM 123.11, 123.61).
What goes on it: full names and addresses, the category (gift, merchandise and so on), a detailed description with quantity, net weight and value for each item, and “the 6-digit WCO HS code for each item in the package unless otherwise specified in the individual country listing” (IMM 123.711). USPS's example: “Men's cotton shirts”, not “Clothes” (USPS).
Books and media count as goods: books, periodicals, CDs and DVDs need a form and a value even though they're printed or recorded (IMM 123.623).
Export filing: enter “NOEEI 30.37(a)” when each class of goods is worth $2,500 or less (IMM 526.2).
Singapore's listing: “Many types of merchandise require import licenses that addressees must obtain from the authorities of Singapore. Senders should be assured before mailing that the addressees can obtain licenses if needed.”
Singapore's listing: “Singpost (the designated postal operator of Singapore) requests that the mailer provide the addressee‘s phone number (if possible) on the customs declaration form or address label.”

Duties, taxes and fees: who pays

USPS's manual says: “The duties, taxes, import fees, and other charges, if applicable, are not included in the postage paid by the mailer,” and most countries charge the recipient a customs clearance and delivery fee on top (IMM 131.34, as revised Oct 19, 2026). Apart from Delivered Duty Paid and the invoices below, USPS doesn't give out information on what other countries charge (IMM 131.34).

If the charges go unpaid: since Oct 19, 2026, when duties, taxes or import fees on your package haven't been paid in full and the customs authority, postal operator or broker in Singapore seeks them from you or USPS, “the Postal Service (or its representative) will send an invoice to the mailer for such amounts” (IMM 424.1). You have to pay the whole invoice by its due date “even if the mailer disputes the assessment,” whether the package was delivered, lost, damaged or returned, and anything not paid by the invoice's due date draws interest at 6% a year (IMM 424.2, 424.4). A challenge to the amount goes to the party that set it, not to USPS (IMM 424.5). USPS made these changes in an interim final rule effective Oct 19, 2026 (Federal Register, 91 FR 66000); its online manual, dated Sep 7, 2026, didn't show them yet when we checked on Oct 19, 2026. More: when USPS bills the sender for unpaid duties.

Singapore's listing: “As of January 1, 2023, the Goods and Services Tax (GST) import relief threshold exemption of 400 Singapore dollars (SGD) is abolished for Business to Consumer (B2C) mailers that meet both of the following conditions:” The two conditions: global turnover over 1 million SGD a year, and more than 100,000 SGD of low-value (under 400 SGD) consumer goods sent to Singapore.
Singapore's listing: “Such mailers must register and pay the GST when sending goods to Singapore.”

General information from USPS's manual, not tax or customs advice. Whether you have to register for Singapore's VAT, GST or a similar tax is a question for a tax professional.

Questions

What's the cheapest way to ship a package to Singapore with USPS?

For a light package, First-Class Package International Service (up to 4 lb and $400 in value): $21.18 for up to 8 oz with a label from a USPS-approved PC Postage provider, or $22.25 at the Post Office or through Click-N-Ship, which charges the retail price (IMM 252.25). From 49 oz, a Priority Mail International Flat Rate Envelope costs less if the item fits: $48.12 online, against $57.07 by First-Class Package International, though USPS offers no tracking on Flat Rate Envelopes. Heavier or more valuable packages go by Priority Mail International, from $64.11 for 1 lb online (Notice 123).

Can I ship books to Singapore?

Yes, but check this entry in Singapore's listing. Prohibited: “Advertisements for charms, amulets and talismans.” Books need a customs form with a value (IMM 123.623). For 11 lb or more of books to one address, an Airmail M-bag starts at $133.43 plus $12.13 a pound over 11 lb (Notice 123).

Can I ship used clothing to Singapore?

Yes. Singapore's IMM listing has no rule on clothing, shoes or used goods. Describe each piece on the customs form (USPS's example: “Men's cotton shirts”, not “Clothes”) (USPS customs forms).

Can I ship electronics with lithium batteries to Singapore?

Only within USPS's limits: new batteries installed in the device, at most four cells or two batteries per package, 100 Wh per battery for lithium-ion, and no used, damaged or defective devices with lithium batteries unless manufacturer-certified refurbished (IMM 135.62-135.64). Singapore's listing adds nothing on batteries.

Who pays duties and taxes on a package to Singapore?

Singapore's listing describes a GST import relief for goods up to 400 SGD and says that since Jan 1, 2023 it no longer applies to large business mailers: those with more than 1 million SGD of global turnover that send more than 100,000 SGD of low-value goods (under 400 SGD) to Singapore must register and pay the GST themselves. Otherwise any duties and taxes are collected from the buyer, and USPS can't prepay them to Singapore. The listing's exact words are quoted under duties and taxes above (IMM Singapore listing). If the charges go unpaid and the destination seeks them from you or USPS, USPS will invoice you, and you have to pay it by its due date even if you dispute the amount (IMM 424, effective Oct 19, 2026).

Do I need an HS code to ship to Singapore?

Yes. Every customs form needs at least the 6-digit HS code for each item unless the country listing says otherwise (IMM 123.711). With USPS's own tools (Click-N-Ship, Customs Forms Online or Global Shipping Software) you can skip the lookup: give a specific description, such as “Men's cotton shirts” instead of “Clothes”, and USPS assigns the code (USPS customs forms). Whatever tool picks the code, “the mailer remains solely responsible” for it being right (IMM 537.4).

Can I mail a trading card or other small item I sold to Singapore in a letter?

No. First-Class Mail International takes only correspondence and documents: “No merchandise, whether dutiable or nondutiable, may be mailed using First-Class Mail International service” (IMM 242.2). The lowest-priced USPS service for goods is First-Class Package International Service, $21.18 online for up to 8 oz, with a customs form; the package has to be at least 6 inches long and 4 inches high (IMM 251.22).

Sources

Rates verified on Oct 19, 2026 from each official page below.

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