£42 covers mobile data for four people over three days at a Munich trade fair, and nothing else. It sits at the top of the advertised UK day-pass range, so your own tariff will move it. Roaming charges on UK business travel to Europe attach to the line and to the day, which is why the total tracks headcount and nights rather than the itinerary. Three days of data on a travel eSIM runs $7.08 a phone in Germany, at $2.36 a day, bought and settled before anyone leaves the office.

Roaming came back, and the bill moved to the employee

Before 2020 a UK phone worked in Milan the way it worked in Manchester, and nobody costed it. That is over. Most UK networks charge for European use on newer tariffs, and the charge attaches to the line.

In practice that means it attaches to a person. The trip is approved with flights, hotel and a stand fee against it. The data charge turns up weeks later on somebody’s mobile bill, gets expensed at £8 or £10, and is signed off without argument because it is small. Nobody adds it up.

Do the addition once. A two-person day trip to Paris is two roaming bills. Four people at a trade fair in Munich is four, three days each, both travel days counted. That is the £42 at the top of this article, and it never appeared in the approval.

What a UK network EU day pass costs now

The networks sell European roaming as a day pass on most newer plans. As advertised at the time of writing they sit at roughly £2 to £3.50 a day depending on network and tariff, which puts three days somewhere between £6 and £10.50 a head. Inclusions and rates change without notice, so price your own contract rather than a headline.

The rate is the part you can look up. What moves the number sits underneath it.

A day is whatever the network says it is. Some bill by the calendar; others open a rolling 24 hours at first use.

Land at 9pm on a Tuesday, glance at email in the taxi, and Tuesday is spent.

The pass also has to draw on something. Most spend your domestic allowance abroad instead of adding to it, so a heavy week in Milan can surface three weeks later as an out-of-bundle charge at home, on a bill nobody connects to the trip.

Three days of data in Europe, priced per phone

A travel eSIM is bought the way you buy a flight. Pick the destination, pay once, and the data profile installs by QR code onto a phone that already has the hardware. The price is published per country and settled before departure, which is the part that matters to whoever approves the trip.

Cost of three days of data, per phone, by destination (HelloRoam Travel Data Price Index)

 

Read the units before comparing rows. Six destinations are quoted per day and multiplied here by three travel days. The bottom row is a 1GB plan sold for seven days at a single price, so its total does not move with the length of the trip. All figures are HelloRoam entry prices sampled on 1 August 2026, and they change without notice.

Three days of data costs $7.08 a phone in the Netherlands and $10.05 in France, a $2.97 gap that becomes $11.88 the moment four people travel.

The part your trip sheet leaves out

The card spread. Every euro your team spends abroad runs through the card issuer’s rate, and most business cards add a non-sterling fee on top of it. Then the terminal offers to bill you in pounds, which is a second conversion, this one set by the merchant’s processor. Decline it and pay in euros. The same caution applies to the dollar prices above. No conversion has been applied here, because the rate moves daily and your card issuer decides the one you get.

The VAT split. A hotel bill in Rome carries Italian VAT, and a VAT-registered UK business cannot recover that on its UK return. It comes back only through a separate claim to the Italian authorities, with its own forms, thresholds and deadlines, repeated country by country. Plenty of firms never file, so the hotel line behaves as a gross cost while the accounts treat it as recoverable.

Mobile data can run the other way. A UK network day pass normally lands on a UK invoice carrying UK VAT, which a registered business handles in the ordinary quarterly return. At 20%, that £42 from the Munich trade fair is £35 net to the business. The number on the tariff page is therefore not the number that reaches your P&L, and the comparison worth running is net against net. Ask any seller, network or eSIM provider, whether the invoice carries recoverable UK VAT before you assume it does.

Which leaves a small conclusion for anyone writing a travel policy. Almost every line on a European trip is set by somebody else: the hotel’s VAT regime, the processor’s rate, the airline’s fare bucket. Connectivity is not one of them. It is the only line you can fix to a known figure, per device, on the day you approve the trip, and it is the one most companies still leave to an expense claim.

What to check before you approve the trip

• The unit. Stretch the trip from three days to five and six rows in that table move. The seventh does not, because it is a week of data sold at one price.
• The head count. Every figure here is per traveller and per device. Tablets and mobile hotspots count as devices.
• The border count. Paris on Tuesday and Brussels on Wednesday needs coverage in both, and a regional plan can beat two single-country ones.
• The number. The data eSIM sits beside the SIM already in the handset, so two-factor codes still arrive where they always did.
• The refund window. Every HelloRoam plan carries a 180-day money-back guarantee, six months from the date of purchase, so the charge stays reversible long after the trip has closed.
• The invoice. One dated charge before departure lands in the month the trip was approved, with a document your finance team can file.

Seven steps before a Tuesday departure

That list is for whoever signs. This one is for whoever flies.

1. Confirm the handset supports eSIM. Most business phones bought in the last few years do.
2. Count the days by calendar, with both travel days included.
3. List every country the itinerary touches, including the one you change planes in.
4. Buy and install the QR code on office Wi-Fi before you go. Airport Wi-Fi at 6am is not a plan.
5. Set the eSIM as the data line and leave the UK SIM on for calls and texts.
6. Switch data roaming off on the UK line so nothing bills twice for the same day.
7. File the receipt at purchase, while it is a dated document rather than a memory.

Prices are published per country rather than blended into a single European rate, which is why three days in Amsterdam and three days in Paris do not cost the same. One eSIM for Europe covers every destination in the table and the rest of the continent on daily terms. For a route your team repeats, price it once and write the figure into the travel policy so nobody has to ask again.

Where the money leaks

Buying at the airport is the expensive default, and it costs twice. There is the captive price, and there is a director standing in a queue on company time.

Double billing is the one nobody spots. If the eSIM is installed but data roaming is still switched on for the UK line, a background sync can trigger a day pass nobody meant to buy. One toggle, checked at the gate, closes it.

Over-buying goes the other way. Daily plans charge for days rather than gigabytes, which removes the guesswork of estimating usage for a colleague you have never watched work.

Then there is the multiplication nobody does in the meeting. Three people on the Amsterdam trip is $21.24 of data, and a tablet in someone’s bag makes it $28.32.

It runs in reverse too. Clients billing time in London face the same charge coming the other way, and UK data runs $2.68 a day, so three days costs $8.04 a head. Visiting teams can sort a pay as you go eSIM for their days here on the same daily terms, which is worth knowing if you host as often as you travel.

Questions finance teams ask

Is an eSIM cheaper than roaming for business travel?

HelloRoam prices European data from $2.36 a day. UK day passes sit around £2 to £3.50 as advertised, so check your tariff.

How much does data cost for a three-day trip to Europe?

Three days of data runs $7.08 to $10.05 a traveller on daily plans. The Netherlands and Germany price at $2.36 a day, Spain at $2.52, Italy and Ireland at $2.68, and France at $3.35. Belgium, Austria and Portugal are quoted differently: $2.21 buys 1GB across seven days as a whole-trip total, so it does not multiply by three.

Will my UK number keep working while the eSIM handles data?

Yes. A data eSIM runs alongside the SIM already in the handset, so calls, texts and two-factor codes keep arriving on your UK number. You choose which profile carries data in the phone’s settings, and you can switch it back mid-trip.

Can we reclaim the VAT on a European trip?

Not on your own UK return, for VAT another country charged. Italian, French or Spanish VAT on hotels and meals comes back only through a separate claim filed with that country’s tax authority, each with its own deadlines, minimum values and forms. Plenty of smaller firms never file, so those lines end up behaving as gross costs. Mobile data works the other way when it is invoiced in the UK with UK VAT, which a registered business handles in the ordinary quarterly return. Ask any seller, network or eSIM provider, which applies before you assume recovery.

Notes on the figures

Everything here was priced in August 2026. HelloRoam rates are advertised entry prices and are subject to change. UK day-pass bands are as advertised at the time of writing, vary by network and tariff, and change without notice, so the only figure worth budgeting against is the one on your own contract. Nothing above is tax advice, and VAT treatment turns on your registration and your invoices. Flights and hotels are excluded because they turn on the booking.