- Written by Adam Sankey - Team Lead Mobile
- Connect with Adam on LinkedIn
Picture this some of your leadership team head overseas for a client meeting or a conference. They text, check emails, and use Google Maps like they normally do, only to return home and find themselves in a meeting with your finance team staring at a wildly inflated mobile bill.
Welcome to the world of bill shock…
What is bill shock?
In the context of business mobiles, bill shock describes the dismay that comes with receiving an unexpectedly high phone bill usually resulting from usage that wasn’t planned or anticipated. This often involves mobile data, international roaming, hidden service fees, or confusing billing structures.
According to Ofcom, nearly 1 in 6 UK mobile customers have experienced some form of bill shock, especially after travelling overseas. The EU’s “Roam Like at Home” initiative offers some protection within Europe, but many businesses operate in countries where such agreements don’t apply.
Bill shock cases in the news:
It was reported in the news that Minister Michael Matheson racked up nearly £11,000 in roaming charges on a parliament iPad while abroad last year.
An employee from a recruitment agency was hit with a mobile phone bill of nearly £18,000 following a four-day business trip to Dubai. The excessive charges stemmed from roaming data usage, and the amount was automatically debited from the employer’s account before anyone realised. This incident underscores how quickly roaming costs can escalate when mobile data is used abroad without proper controls in place.
In one widely shared case, a traveller returned from a cruise to find a £1,050 bill, primarily due to unnoticed background data usage.
Why bill shock happens for businesses
In businesses, bill shock is often amplified. Employees traveling for work rarely monitor data consumption or even realise they’re roaming whilst working overseas.
Here are the other key reasons bill shock occurs:
- Unclear or hidden charges: Roaming fees can be buried in fine print or not clearly explained.
- Lack of real-time alerts: When employees roam internationally, they often do not receive timely notifications about their usage or cost.
- Unintentional data use: Background tasks like auto-syncing or app updates can eat data unnoticed, especially if Wi-Fi is weak or unreliable.
Even common apps like Outlook, Microsoft Teams, or Slack can use hundreds of megabytes per hour when syncing messages and files—especially during poor network conditions when retries increase consumption. Employees using VPNs to access internal systems also risk triggering excessive background data usage.
Four practical steps to prevent bill shock
1. Educate your employees on the plan allowances
Start with the basics make sure you’re employees are all crystal clear on your roaming charges. Which countries are covered by your plan and also what’s included or not in daily or fixed-rate options.
Trips abroad for work can be stressful for employees. The last thing they are going to think about is cost implications on their mobile bill but by sharing roaming tips you will equip them with helpful advice to prevent bill shock.
Here’s some basics
- Airplane Mode: Notify them to set their phones to airplane mode while flying or during transit, to prevent roaming.
- Background data tasks: Disable background data, location services, and auto-sync for non-essential apps before they depart.
- Reduce data dependency: Encourage downloading maps, docs, and guides for offline access before departure to reduce data dependency.
Create a pre-travel checklist or pack it into a digital onboarding document for international travel. This can be automated via your MDM (Mobile Device Management) software or sent out by HR before trips.
2. Use Spend Caps and Tiered Alerts
Ensure you ask your mobile provider to set spending caps on employee accounts that automatically halt usage or notify you once limits are approached. Many carriers let you impose custom caps or enable alert tiers which are ideal for keeping tabs on travelling staff. These are not default settings that have to be requested and help prevent bill shock.
3. Consider eSIMs or business-focused roaming packages
For businesses with frequent travellers, traditional roaming plans may still be insufficient. Tools like eSIMs, dual-SIM devices, or VIP roaming tariffs with all-inclusive roaming can be more cost-effective. eSIMs can be provisioned remotely, making them ideal for hybrid or distributed teams. They also enable you to install region-specific plans without having to switch physical SIMs which is a great option for frequent flyers or contractors.
4. Culture of communication & real-time monitoring
Mobile usage should be closely monitored holistically not on a case by case basis. IT teams should set up and closely monitor roaming usage dashboards to flag spikes instantly. Opus can help with this. They also must train their business travellers on how to check usage and alert users when they hit thresholds. Real-time monitoring is more effective when tied to automated notifications. For example, if a user exceeds 80% of their roaming allowance, they should receive a prompt in-app notification or SMS with instructions.
The importance of preventing bill shock
Bill shock especially from international roaming, is a prime culprit in derailing budgets and putting unnecessary strain on company finances. But with a clear understanding, smart roaming limits, employee education, and cost effective tariffs such as the Opus VIP mobile tariff, this is entirely avoidable.
Preventing bill shock isn’t just about cost control, it’s also a productivity issue. Employees worried about mobile costs may delay tasks or avoid communication, especially in remote locations. Removing this concern helps them focus on delivering value and working efficiently without compromise.
Get in touch to discuss how Opus can help you overcome bill shock. We will audit your current mobile plan and demonstrate the savings that can be achieved on our VIP tariff.
