Business travel data without the expense claim
Roaming is the line on a travel expense report nobody checks until it is £400. A practical way to handle connectivity for one traveller or forty.
onesim team
Mobile roaming is one of the few travel costs nobody budgets and everybody pays. It arrives a month late, on a phone bill rather than an expense report, and by then the trip is a memory and the invoice is just a number.
For one person a few times a year, it is noise. For a team of twenty flying regularly, it is a real line item that is almost entirely avoidable.
Where the money actually goes
Three patterns account for most of it.
The day pass that runs on a day nobody travelled. Most carrier day passes trigger on the first byte of data, at any hour. A phone that syncs email at 5am on a layover starts a full-price day for a passenger who is asleep.
The trip that goes outside the bundle. Corporate tariffs usually cover a zone — the EU, or a named list. The Balkans, Türkiye, the Gulf and most of Asia often sit outside it, at rates several times higher, and the traveller has no way of knowing until the bill.
The laptop. One software update or a large file sync over a tethered connection can exceed a fair-use cap in an afternoon, after which the whole line is throttled or charged per megabyte.
The cheapest fix is a policy, not a product
Before buying anything, write down three rules and tell people what they are.
A one-page travel connectivity policy
- Data roaming stays off on the company SIM unless the destination is inside the tariff's zone
- Anyone travelling outside the zone gets a prepaid data package, bought before departure
- Laptops connect over hotel or office Wi-Fi, not tethered, unless there is no alternative
- Cloud backup and OS updates are set to Wi-Fi only on every managed device
- One named person checks the roaming lines on the bill each month
That alone typically removes most of the surprise, because most of the surprise is unmanaged rather than unavoidable.
What to give travellers instead
A prepaid regional package has three properties a finance team cares about: the cost is known before the trip, it cannot overrun, and it is attached to a trip rather than to a monthly contract.
The practical shape:
- One eSIM per traveller, kept on the phone. Packages attach to it for each trip, so nobody installs anything twice.
- Regional rather than per-country, because business trips cross borders and a regional package has one allowance across the list.
- Small, topped up if needed. Data that runs out stops; it does not generate a bill. Buying the smaller package and adding to it is cheaper than buying for the worst case every time.
- Tethering allowed, so a laptop in a meeting room with no guest Wi-Fi is not a crisis. Shared data comes off the same allowance.
The company SIM stays in the phone, keeps its number, and has its data roaming switched off. Calls and texts still arrive.
When roaming is still the right answer
Be honest about this, because a policy that ignores it gets ignored.
If your team travels mainly inside the EU on EU contracts, roam-like-at-home already covers them and adding anything else is waste. If someone is in one country for three months, a local business tariff will beat any travel package. And if a role genuinely needs a reachable local number — sales, logistics, site work — that is a local SIM or a second line, not a data package.
The sweet spot for prepaid travel data is the ordinary business trip: three days to three weeks, one or several countries, data rather than voice, and a cost you want to know in advance.
For more than a handful of people
Once you are buying for a team, the admin becomes the cost. What is worth asking a provider for:
- One account with several eSIMs, rather than a personal account per employee
- A single invoice rather than a card charge per purchase
- Someone who can move an eSIM to a replacement handset when a phone is lost mid-trip
- Coverage that matches your actual destination list, checked country by country rather than by region name
We do this as a managed arrangement rather than a self-serve one; the business travel page covers how it works.
A quick sanity check
Take last year's phone bills, find the roaming lines, and divide by the number of trips. Most companies that do this discover they are paying somewhere between £40 and £150 per trip for data that would cost a fraction of that bought in advance — and that the largest single bill belongs to someone who did not know their destination was outside the bundle.
