How to Send Post to the USA from the UK: Carriers, Costs, and Customs Explained

TL;DR

Sending postage to the USA from the UK means choosing between Royal Mail, Parcelforce, DHL, Evri, and aggregators like ParcelMonkey. Royal Mail is cheapest for letters and light parcels; couriers are faster for heavier items. US customs rules changed in August 2025, and every commercial item now needs a declaration form. Prices vary sharply by weight, and online booking is nearly always cheaper than going over the counter.

Key Takeaways

There are six main carrier options for UK senders, each suited to different parcel sizes and delivery expectations. Here is what matters most before you book anything.

•        Royal Mail, Parcelforce, DHL, Evri, ParcelMonkey, and Parcel2Go all cover UK-to-USA shipments.

•        Costs vary sharply by weight — a 5 kg parcel can cost three times more than a 1 kg one on the same service.

•        Letters and parcels sit in different pricing tiers entirely, with separate weight and size rules.

•        Tracking quality differs between services, and Royal Mail's International Standard has none at all.

•        US customs changed in August 2025 — the de minimis exemption is now actively enforced, affecting eCommerce sellers.

•        eCommerce businesses sending volume shipments have access to better rates through consolidation and third-party fulfilment.

The right service depends on what you are sending, how quickly it needs to arrive, and what it is worth. Read on for the full breakdown.

What Sending a Post to the USA Actually Involves

Shipping to the USA from the UK is not complicated, but it is not quite the same as posting within Europe either. The USA sits in Royal Mail's World Zone 3, which puts it in the highest pricing band, and the transatlantic route involves a handoff from UK carriers to the USPS at the US border. That handoff point is where tracking quality often drops for economy services.

Why the USA Is a Distinct Shipping Destination

World Zone 3 classification means higher base prices across all Royal Mail services. Beyond that, US customs rules work differently from those in Europe, and since August 2025, they have changed again. The USPS takes over delivery once a parcel clears US customs, and delivery aims rather than guaranteed windows govern most standard services. DHL and other private couriers handle the last mile themselves, which gives them a clear speed advantage.

You should also know that delivery addresses in the USA require a zip code, and getting this wrong can delay or return a parcel. The recipient's state abbreviation matters too, so always confirm the full address before booking.

Letters Versus Parcels Versus Large Items

What you are sending determines which carriers will take it and what you will pay. A standard letter has its own pricing tier, a small parcel is priced by weight up to certain thresholds, and large or heavy items step into freight or express-only territory. The table below gives a quick overview of how size brackets map to eligible carriers and starting prices.

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Weight affects cost more than dimensions in most cases, though couriers apply dimensional weight calculations for bulky but light packages. If a parcel's declared value exceeds certain thresholds, US customs forms are required regardless of size. Sellers comparing per-unit shipping costs in detail should also read this guide to the cheapest shipping from UK to USA, which goes deeper on cost-per-weight comparisons across carriers.

Carrier-by-Carrier Breakdown for UK to USA

Six main options cover the UK-to-USA route. They differ on price, speed, tracking quality, and the weight ranges they handle well. Understanding each one saves you from overpaying or choosing the wrong service for the job.

Royal Mail International Services

Royal Mail offers three main service levels for USA-bound post: International Standard, International Tracked, and International Tracked and Signed. Standard is the cheapest but comes with no tracking, which is a real risk for anything valuable. International Tracked gives end-to-end visibility, and Tracked and Signed adds a signature on delivery. 

Prices differ between Click and Drop online booking and over-the-counter rates, and the online savings can be meaningful. Royal Mail's USA country guide page covers current service options, size limits, and any active restrictions — worth checking before you send, since rules do update. Since the 2025 customs changes, Royal Mail's International Tracked service to the USA has also been classified as a Postal Delivery Duties Paid (PDDP) service, meaning any applicable duty is calculated and charged at the point of posting, with confirmation printed on your receipt. 

Compensation limits also vary by service. The International Standard covers up to £20 for loss. International Tracked and Signed goes up to £50 as standard, with enhanced cover available for higher-value items. If your parcel is worth more than the base limit, it pays to upgrade the service or buy additional cover.

Post Office and Parcelforce

The Post Office acts as a retail counter for both Royal Mail and Parcelforce services, so what you buy over the counter there is simply one of those two. Parcelforce's GlobalExpress and GlobalPriority services offer a clear speed advantage over Royal Mail's standard international options. GlobalPriority typically takes 3 to 5 business days to the USA; GlobalExpress is faster and sits at the premium end of the price range.

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Weight limits matter here. Royal Mail's international parcel services cap at 2 kg for most tracked options. Parcelforce goes up to 30 kg, making it far better suited to heavier shipments. Surcharges for remote delivery areas in the USA can add to the cost, so check whether your recipient's zip code attracts any area surcharges before confirming the price.

DHL, Evri, and Courier Options

DHL Express is the fastest widely available option for UK-to-USA shipments, typically delivering in one to three business days. It handles the entire journey, including customs clearance and last-mile delivery, eliminating the USPS handoff issue entirely. The trade-off is cost: DHL sits at the premium end of the market, and it calculates charges on dimensional weight, which can surprise senders of bulky but light packages.

Evri competes well on lighter parcels, particularly in the one to two kilogram range, where its rates can undercut both Royal Mail and Parcelforce. ParcelMonkey and Transglobal Express are aggregators that pull quotes from multiple carriers, often returning prices below what you would get booking directly. They are worth checking for one-off shipments, though their customer service can be slower to respond if something goes wrong.

How Much Does It Cost to Send a Parcel to the USA from the UK?

Price depends on weight, carrier, service level, and whether you book online or at a counter. The ranges below are approximate starting points based on standard, undiscounted online rates. Prices shift, and Royal Mail's price increases from April 2026, together with the international surcharge rise from 6.5% to 12% on 3 May 2026, have already affected the figures below. Always confirm current rates at royalmail.com/current-postage-prices before booking. 

Weight-Based Pricing: 0.5 kg to 5 kg

A light parcel at 0.5 kg sits at the cheaper end of the range across most carriers, while the cost difference between a 1 kg and a 5 kg parcel is steep. The table below compares approximate online starting prices across the four main carrier options for UK-to-USA delivery.

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Dimensional weight can override actual weight for couriers. A lightweight box that takes up a lot of space will be charged on its volume, not its mass. Measure your parcel carefully and check the carrier's volumetric formula before assuming the cheapest service by kilo rate is actually cheapest for your specific item. Booking online rather than at the counter saves money across the board.

What Is the Cheapest Way to Send a Parcel to the USA?

For light parcels under 2 kg, Evri International or Royal Mail International Tracked tend to come out cheapest when booked online. For anything heavier, Parcelforce GlobalPriority is often the best value tracked option. Aggregators like ParcelMonkey and Parcel2Go compare rates across multiple carriers and sometimes return quotes below direct carrier pricing, particularly for mid-weight parcels in the two to five kilogram range.

Economy services trade speed for cost. If your parcel is not time-sensitive and tracking is less of a priority, economy options can cut costs further. eCommerce sellers sending regular volume can access negotiated rates through carrier accounts or third-party fulfilment providers, where per-unit costs drop as volume increases. Consolidating multiple orders into one shipment also lowers the effective cost per parcel.

US Customs, Duties, and What You Cannot Send

US customs rules apply to every shipment crossing the border, including gifts. Getting the declaration right matters both for compliance and for the parcel actually arriving. Since August 2025, enforcement has changed, and understanding the current position saves you from surprises.

How US Customs Works for UK Senders

Every commercial shipment to the USA requires a customs declaration. The form type depends on the value: CN22 covers items below a certain threshold, and CN23 is required for higher-value or commercial goods. Getting the description wrong, undervaluing a parcel, or ticking the wrong category can lead to delays, the parcel being held for inspection, or returned to the sender.

The de minimis threshold, which previously allowed low-value imports to enter the USA duty-free without formal customs processing, has been actively enforced since August 2025. The CBP announcement from August 2025 confirms this change. From 28 February 2026, the position tightened further, as postal shipments lost the option of paying a flat specific duty rate and must now have duty calculated under the ad valorem method, based on the parcel's declared value and HS classification. eCommerce sellers shipping to US customers need to factor customs duties into their pricing and fulfilment planning, as the informal route many relied on is no longer available. 

The difference between CN22 and CN23 matters both practically and legally. A full guide to CN22 and CN23 customs forms covers what each form requires, when to use which, and how to fill them in correctly. Getting this right from the start avoids costly delays.

Prohibited and Restricted Items for USA Shipments

Both Royal Mail and USPS maintain lists of prohibited and restricted items, and the sender is responsible for compliance with both. The general categories to know before you post are set out below.

•        Lithium batteries are subject to strict airline transport rules and often cannot be sent as standalone items, only when installed in devices.

•        Food and agricultural products face significant restrictions, particularly items of animal origin or products that could introduce pests.

•        Certain aerosols and liquids are prohibited on international mail, including many pressurised canisters and flammable substances.

•        Knives, weapons, and anything that could be classified as offensive are not permitted in international post from the UK.

•        Counterfeit goods, obscene material, and items infringing intellectual property are prohibited under both UK and US law.

If in doubt, check Royal Mail's prohibited items list and USPS's import restrictions before booking. The rules can differ between carriers, and some items accepted by one may be refused by another.

Tracking and What Happens If a Parcel Goes Missing

Tracking coverage varies considerably across services, and it is worth understanding what you are actually getting before you send anything valuable. The USPS handoff point on arrival in the USA is where tracking quality can drop, particularly on economy services.

Tracking Levels Compared by Service

Royal Mail's International Standard has no tracking whatsoever. If it goes missing, your claim starts from a position of no evidence. International Tracked gives you end-to-end visibility, including scans at the US end. Couriers like DHL maintain real-time tracking because they handle the full journey themselves. On Parcelforce services, tracking works well throughout, though the level of detail at the delivery stage can vary by destination area in the USA.

Tracking visibility does drop at the USPS handoff for Royal Mail and Parcelforce services. The parcel often shows as arrived in the USA, but gives no further updates until it is delivered. This is a known limitation, and for high-value shipments, it is a good reason to consider a private courier that maintains control all the way to the door.

How to Claim If a Parcel Is Lost or Damaged

Compensation limits differ by service, and claim windows are usually fixed. Royal Mail's standard window for international claims is 80 days from the date of posting. Parcelforce has a similar window. 

You will need proof of postage, proof of the item's value, and any packaging evidence if the claim is for damage. Signed delivery services provide the clearest proof that a parcel was delivered, which matters both for your records and for any dispute resolution.

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Enhanced compensation is available on most services for an additional fee. If you are sending anything worth more than the base limit, it is worth paying for extra cover rather than relying on the standard figure. Keep receipts, invoices, and photographs of the item and packaging as standard practice, especially for high-value international shipments.

Choosing the Right Option for Your Shipment

Postage to the USA from the UK comes down to three things: what you are sending, how fast it needs to get there, and what you are willing to pay. Royal Mail is the natural starting point for letters and light parcels, and its International Tracked service gives solid end-to-end visibility at a reasonable price. 

Parcelforce steps in for heavier items where Royal Mail's 2 kg limit becomes a constraint. DHL Express is the clear choice when speed matters most, and cost is secondary. For the best price on any weight bracket, running a comparison through ParcelMonkey or Parcel2Go before booking directly is worth the extra five minutes.

US customs changes since August 2025 have raised the stakes for eCommerce sellers in particular. Declaring shipments accurately, using the right customs form, and pricing delivery costs with duties in mind are no longer optional considerations. If you are shipping to the USA in volume, the case for a fulfilment partner who handles international compliance and carrier relationships on your behalf is stronger than ever.

eCommerce businesses sending regular international orders should consider whether outsourcing fulfilment makes sense at their current volume. Bezos.ai's international fulfilment service covers how third-party fulfilment can simplify carrier management, customs compliance, and per-unit shipping costs for sellers growing their US customer base.

FAQ

How much does it cost to send a parcel to the USA from the UK?

It depends on weight and carrier. Light parcels start from around £8–£12 via Royal Mail or Evri; heavier ones cost significantly more via Parcelforce or DHL.

What is the cheapest way to send a parcel to the USA from the UK?

Evri International or Royal Mail International Tracked for under 2 kg. Use ParcelMonkey or Parcel2Go to compare across carriers for heavier items.

How long does a post take from the UK to the USA?

Royal Mail International Standard takes 6–7 working days. Tracked services aim for 5–7. DHL Express typically delivers in 1–3 business days. 

Do I need to fill in a customs form to send to the USA?

Yes. Use CN22 for lower-value items and CN23 for higher-value or commercial shipments. Full guidance on customs forms is available here.

What items are prohibited when sending post to the USA?

Lithium batteries, as standalone items, most food and agricultural products, aerosols, weapons, and counterfeit goods are all prohibited or heavily restricted.

Can I send a letter to the USA with a regular stamp?

No. International letters need correct international postage. A standard UK first- or second-class stamp is not valid for overseas post.

What changed with US customs rules in 2025?

The de minimis exemption, which allows low-value imports to be imported duty-free, is now actively enforced by CBP. Sellers can no longer rely on informal low-value entry for US shipments.

What is dimensional weight, and how does it affect courier costs?

Dimensional weight calculates cost from a parcel's size, not just its mass. A large but light box may cost more than its actual weight suggests.

Is Parcelforce or DHL better for sending to the USA?

For budget and reliability on medium parcels, Parcelforce GlobalPriority is solid. DHL Express is faster but costs more, making it better for urgent or high-value shipments.