Franking international mail in 2026 works in three steps: pick the right Royal Mail zone, weigh and measure the item exactly as you would for UK post, then attach the correct customs declaration. The big change this year is customs paperwork, not price. Since 1 June 2026 the CN23 form has replaced the CN22 across almost every Royal Mail service, and the old "Sale of Goods" category has been split into B2B and B2C. Get those two things right and your overseas mail moves as smoothly as your domestic run.
The six Royal Mail international zones
Royal Mail does not price international post country by country. It groups destinations into six zones: Europe Zone 1, Europe Zone 2, Europe Zone 3, World Zone 1, World Zone 2 and World Zone 3. Your franking machine holds these zones in its rate table, so when you select a destination the machine looks up the zone and applies the right price.
So nobody needs to memorise which zone Chile or Singapore sits in. What you do need is an up-to-date rate table in the machine. If your meter has not downloaded the rates that took effect on 7 April 2026, every international impression you print is wrong, and Royal Mail will either surcharge the recipient or return the item.
What International Standard costs in 2026
International Standard is the everyday service most small businesses use. For 2026 a letter weighing up to 100g costs £3.60 to every single zone, whether you buy a stamp or frank it. A Large Letter up to 100g is £3.80 to the three European zones and £4.60 to the three World zones. The gap between zones widens quickly from there: a 250g Large Letter is £6.15 to Europe but £9.55 to World Zone 2. The complete 2026 International Standard price tables on the Mailcoms site show stamp and Mailmark franking prices side by side.
Does franking save money on international post?
Not on the headline rate. For International Standard in 2026, the Mailmark franking price and the stamp price are identical. This surprises people, because franking has a well-earned reputation for beating stamps on UK mail, where Mailmark saves 3p on a standard First or Second Class letter and up to 44p on a First Class Large Letter. We covered that comparison in detail in our guide to franking machines versus stamps.
So where is the value overseas? In precision and control.
- You pay the exact amount. Stamps come in fixed denominations, so an item needing £4.60 often gets £5.00 of stamps stuck on it. Frank it and you pay £4.60.
- The weight is measured, not guessed. An integrated scale removes the most common cause of international surcharges.
- Spend is recorded by department. Most machines let you post international mail to a separate account code, which matters if overseas post is billed to a client or project.
Franking international mail is about accuracy rather than discount. For a business sending twenty overseas items a week, the rounding alone usually pays for itself.
The June 2026 customs changes you must know
This is the part that has caught people out. From 1 June 2026, Royal Mail made three changes to customs declarations on international items of commercial value.
1. CN23 is now the standard form
The shorter CN22 is no longer available for selection, with one exception: where a combined customs and shipping label is selected, CN22 still applies. For everything else it is CN23, which asks for more detail, including a fuller description of contents, value, weight and country of origin per line item.
2. Sale of Goods split into B2B and B2C
A legislative update divided the old "Sale of Goods" category in two. B2B covers a commercial sale from your business to an overseas business. B2C covers an eCommerce sale from your business direct to an overseas customer. Choosing the wrong one can slow an item at the border, so brief whoever runs the mailroom. Mailcoms has a clear summary of the June 2026 category of items changes.
3. The "Mixed" category has gone
Mixed was removed to simplify selection. If your internal process document still lists it, update the document. Electronic customs data is still required alongside the physical form. The paper declaration and the data submission are two separate obligations, not alternatives. Royal Mail's own guidance on sending internationally is worth bookmarking for your mailroom.
Practical mailroom setup for overseas post
Check size before weight. International items follow the same Letter, Large Letter and Small Parcel logic as UK post, and the same rule applies: if it will not fit the slot, it is not a letter. Our 2026 postage size guide walks through the templates and the surcharges that follow a wrong call.
Use labels for anything the machine cannot feed. Small parcels and thick packets will not run through the deck, so the impression goes onto a franking label instead. Our guide to franking labels explains when to reach for them and how to store them so the adhesive survives.
Do not let a tired cartridge ruin an international impression. Overseas items pass through sorting equipment in more than one country, so a faint or streaky frank has more chances to fail a scan. Replacing the cartridge before it fades is cheaper than paying twice, and you can pick up approved ink and labels for your model from our Pitney Bowes, Quadient, FP Mailing and Frama ranges.
Match the envelope to the journey. A flimsy envelope that survives a Manchester to Leeds trip may not survive a flight and two customs checks. Heavier paper weights and a properly sealed flap matter more here, so browse our business envelope range if your current stock is on the thin side.
Respect the posting deadline. Our guide to posting franked mail and handover rules covers what happens when the date on the impression and the date of handover do not agree.
The sustainability angle
Overseas mail carries a bigger footprint per item than domestic post, which makes waste reduction worth more. Accurate weighing stops you buying more service than the item needs, recycled or FSC-certified envelopes keep plastic out of the stream, and our ink resetting, refilling and recycling service keeps empties out of landfill while cutting the cost per impression. There is more on our sustainability page.
What if your machine cannot handle international rates?
Older meters sometimes hold a reduced rate table, or lack the connectivity to pull the latest international prices. Since non-Mailmark meters have been decertified, any machine still in service should be capable of a rate download, but capability and configuration are not the same thing.
Green Franking supplies the consumables. For the machine itself, our sister company Mailcoms can help you buy, lease or rent a franking machine and are Royal Mail Authorised Inspectors, so they can also advise on sending mail internationally from your specific model. If you are unsure what your machine supports, ask before your next overseas batch rather than after.
A quick pre-flight checklist
- Rate table updated to the 7 April 2026 prices
- Item measured against the Letter or Large Letter template, then weighed
- Correct zone selected on the machine
- CN23 completed, with B2B or B2C chosen correctly
- Electronic customs data submitted
- Clear, dark, fully formed impression on the envelope or label
- Handed over before the posting deadline
Seven checks, most of them taking seconds, and they are the difference between a parcel that lands in Sydney next week and one that comes back to your desk with a sticker on it.
Frequently asked questions
Is franking cheaper than stamps for international mail in 2026?
Not on the published rate. For Royal Mail International Standard in 2026, the Mailmark franking prices match the stamp prices across all six zones. The saving comes from paying the exact amount rather than rounding up to the nearest stamp denomination, and from weighing every item accurately instead of estimating.
Do I still use a CN22 customs form?
Only in one situation. Since 1 June 2026 the CN23 is the standard customs declaration across Royal Mail postal services, and the CN22 is no longer available for selection except where a combined customs and shipping label is chosen.
What is the difference between the B2B and B2C category of items?
B2B, or commercial sale of goods, covers a sale from your business to an overseas business. B2C, or eCommerce goods, covers a sale from your business direct to an overseas customer. The two replaced the single "Sale of Goods" option from 1 June 2026, and the "Mixed" category was removed at the same time.
How many Royal Mail international zones are there?
Six: Europe Zone 1, Europe Zone 2 and Europe Zone 3, plus World Zone 1, World Zone 2 and World Zone 3. Your franking machine holds the zone mapping in its rate table, so you select the destination and the machine applies the correct price.
How much does an international letter cost to frank in 2026?
A Royal Mail International Standard letter weighing up to 100g costs £3.60 to every zone under the prices that took effect on 7 April 2026. A Large Letter up to 100g is £3.80 to the European zones and £4.60 to the World zones. Always confirm against the current rate table in your machine, as prices change.
Why does my international frank get rejected more often than UK mail?
Overseas items pass through sorting equipment in at least two countries, so a faint, streaky or partial impression has more chances to fail a scan. A fresh, Royal Mail approved ink cartridge and a properly stored franking label prevent most of these cases.