Royal Mail International Tracked vs PDDP: What's the Difference?

The short answer

Royal Mail International Tracked ships DDU — the recipient pays US duty before delivery. Royal Mail PDDP pre-pays the duty at booking — the recipient pays nothing on delivery. The transit times and tracking depth are similar; the difference is who pays the duty and when.

Since February 2026, when the US removed the $800 de minimis on commercial imports, this is no longer a stylistic choice. For commercial UK→USA shipments, PDDP is essentially the only Royal Mail option that doesn’t dump a surprise bill on your buyer.

How the two services work

Both run on the same Royal Mail International network with the same hand-off to USPS for the US final mile. The pricing, weight bands, and country coverage are nearly identical. The difference is the duty leg.

Royal Mail International Tracked (the older general-purpose international service):

• DDU — duty unpaid
• Tracked end-to-end (Royal Mail + USPS)
• Compensation up to £50 included
• Available to most countries worldwide
• For the USA: buyer is liable for any import duty owed

Royal Mail International PDDP (Prepaid Delivered Duty Paid, the marketplace-prepaid product):

• DDP — duty paid by sender at booking
• Tracked end-to-end (same network as International Tracked)
• Compensation up to £50 included
• Available to a subset of major destinations (US, Australia, EU, Canada, others)
• For the USA: duty calculated and pre-paid at the point of booking

The tracking quality is the same because the network is the same.

The duty change that matters

Until February 2026, the US had an $800 de minimis threshold — parcels under $800 in declared value entered duty-free. This made Royal Mail International Tracked viable for most UK ecommerce because under-$800 parcels (which is most of them) attracted no duty either way.

That threshold was removed for commercial imports in February 2026. Now every commercial parcel from the UK to the US attracts duty from the first dollar. The de minimis still exists for personal gifts up to USD 100 between private individuals, but it no longer applies to commercial shipments.

The practical consequence:

• Pre-2026: Royal Mail International Tracked was fine for most US shipments because duty rarely applied
• Post-2026: Royal Mail International Tracked means the buyer is hit with duty + USPS handling fee on every commercial parcel

What the buyer experiences

With Royal Mail International Tracked (DDU):

1. Parcel arrives at US port of entry
2. US Customs assesses duty on the declared value
3. USPS or the carrier’s broker sends the buyer a text or letter requesting payment
4. Buyer pays the duty plus a USPS handling fee (typically $5.50–$30)
5. Parcel is released and delivered

The handling fee alone is often more than the actual duty. For a £40 candle that attracts $2 in duty, the buyer pays $2 + $25 = $27 to receive a $50 candle. Most buyers complain. Some refuse the parcel.

With Royal Mail PDDP (DDP):

1. Parcel arrives at US port of entry
2. US Customs accepts the pre-paid duty declaration
3. USPS receives the parcel for final-mile delivery
4. Buyer receives the parcel — nothing to pay

The whole experience for the buyer is identical to a domestic US parcel. No phone calls, no payment requests, no surprise fees.

Price comparison

May 2026 prices, residential US destination, including duty pre-payment on PDDP. Royal Mail International Tracked does not include duty (charged to buyer on delivery).

The PDDP premium ranges from £1.80 to £4 per parcel, depending on weight and declared value.

Compare this to what the buyer pays on a DDU parcel:

• $2–8 in duty on most small ecommerce orders
• Plus a $5.50–30 USPS handling fee
• Total surprise charge of $10–35

For most parcels, the PDDP premium is less than half what the buyer would have paid on the DDU version. The math has been inverted since 2026.

Tracking depth and transit time

Both services have similar tracking and transit profiles.

The 2kg cap is the same on both. The transit times are the same. The tracking interface is the same. The only effective difference is the duty pre-payment.

This is unusual for carrier service comparisons — usually two services have different transit profiles or different reliability. With these two, it’s purely a financial/duty question.

When to use each

Royal Mail International Tracked still has a few valid use cases:

• Documents and paperwork under $5 in declared value (zero duty likely)
• Genuine person-to-person gifts under $100 marked “Unsolicited Gift” (qualifies for personal gift exemption)
• Returns of US-origin goods (no duty owed on US returns)
• Samples to a US business that has its own customs broker handling clearance

Royal Mail PDDP is the default for:

• All commercial ecommerce orders
• Anything where the buyer’s experience matters
• Anything over $100 in declared value
• Anything where you’d rather not deal with returns and refunds caused by surprise duty bills

The threshold is essentially: if it’s a commercial shipment, use PDDP. The £2–4 premium is a small price compared to the customer experience hit of a DDU parcel.

A real comparison

I shipped two identical 800g parcels in March 2026, same UK Etsy shop to same kind of US buyer (one in Texas, one in New York), declared value £65, identical contents.

• Parcel A went on Royal Mail International Tracked, cost £11.80
• Parcel B went on Royal Mail PDDP, cost £13.90

Parcel B arrived in 6 working days, buyer paid nothing, left a 5-star review.

Parcel A arrived in 7 working days, buyer got a USPS text asking for $4.20 in duty + $5.50 handling fee = $9.70 before they could collect. They paid, but emailed the seller to ask why they hadn’t paid the duty up front. The seller refunded the $9.70 to keep the customer.

Net cost: Parcel A = £11.80 + £7.80 refund = £19.60. Parcel B = £13.90.

PDDP was £5.70 cheaper and the customer experience was better.

How to switch

If you’re shipping through Royal Mail Click & Drop or directly via Royal Mail business accounts, PDDP is available as a service selection at the point of booking. On TradeWind, getting a quote at /ship defaults to PDDP for US destinations.

If you’re shipping at any volume through your own Royal Mail business account, raise the PDDP option with your Royal Mail account manager — there are minimum volume tiers for some PDDP rate cards. For ecommerce sellers without a direct Royal Mail account, going through a reseller like TradeWind or one of the aggregators is the standard path.

The bottom line

Royal Mail International Tracked was the right answer for UK→USA in 2024. Royal Mail PDDP is the right answer in 2026. The de minimis removal means DDU is now a customer-experience trap on every commercial parcel.

The £2–4 premium per parcel is small. The avoided refunds, complaints, and lost customers are large. For more on why DDP matters, see DDP vs DDU shipping. For how Royal Mail PDDP compares against UPS Worldwide Economy DDP — the other big DDP option — see Royal Mail PDDP vs UPS WWE DDP. For B2B volume, the TradeWind business platform handles both services on a single account.