Calling abroad from the UK costs more than most people expect. The average UK mobile carrier charges Ā£1.00āĀ£2.00 per minute for international calls outside your bundle ā that's up to 100Ć the rate of a modern VoIP service. This article compares five real VoIP options available to UK callers in 2026, breaks down what you actually pay per minute, and flags the hidden costs most reviews skip. No fluff. Just numbers.
Key Takeaways:
- UK mobile carriers charge up to Ā£2.00/min for international calls; VoIP services start from Ā£0.02/min to the same destinations
- Browser-based VoIP requires zero hardware, no SIM card, and no monthly seat fees ā making it the lowest-friction option for both individuals and teams
- The cheapest rate isn't always the real cost: connection fees, monthly subscriptions, and per-seat pricing can flip the comparison entirely
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UK International Call Rates in 2026: What You're Actually Paying Now
If you're still using your mobile carrier for international calls, you're almost certainly overpaying. EE's standard out-of-bundle international rate is Ā£1.49/min to the US. Three and Vodafone sit in a similar range. Even with add-on packs ā typically Ā£5āĀ£15/month ā you're locked into specific country lists, limited minutes, and contracts. We covered this in more detail in our comparison of EE and Three add-ons vs VoIP.
VoIP changes the maths completely. Instead of paying per minute through your carrier, you route calls over the internet. The savings aren't marginal. They're structural.
The question is which VoIP service actually delivers on the headline rate once you account for setup, fees, and real-world reliability.
The 5 Services Compared (and How We Evaluated Them)
Most "comparison" articles list features without telling you what anything costs in practice. We focused on four real factors: per-minute rates to common destinations, monthly fixed costs, hidden fees, and whether it works without downloading software.
The five services: GlobCall, WhatsApp, Viber, Google Voice, and Microsoft Teams Phone.
1. GlobCall ā Browser-Based, Pay-As-You-Go
GlobCall charges from $0.02/min to the US and Canada, $0.03 to UK landlines, and $0.08 to India ā with no monthly subscription and no seat fees. You top up a shared balance and call from any browser. No app download. No contract. Two clicks and you're connected.
For UK-based callers, that's roughly Ā£0.016/min to the US at current exchange rates. Compare that to EE's Ā£1.49/min.
The pay-as-you-go model suits anyone who makes international calls regularly but doesn't want to commit to a monthly plan. Teams particularly benefit: one shared balance means you're not paying per seat. A 10-person team pays the same fixed rate as a solo caller. No per-user licensing. If that model interests you, this breakdown of how teams share one balance is worth reading.
Real cost: low and transparent. No connection fees on standard routes. No monthly minimum.
2. WhatsApp ā Free, But Only to Other WhatsApp Users
WhatsApp calls are free ā full stop ā when both parties have the app. That's genuinely useful for calling family or contacts who are already on it. But the moment you need to call a landline, a business number, or anyone not on WhatsApp, you're stuck. WhatsApp doesn't support calls to regular phone numbers at all.
The "free" label only applies inside a walled garden. If your recipient is a hotel in Tokyo, a supplier in Lagos, or a government office in Manila, WhatsApp won't help you.
We've written about this distinction before: what's actually free in international calling and what isn't. The short version is that app-to-app calls are free; app-to-phone calls cost money, and WhatsApp simply doesn't offer the latter.
Real cost: Ā£0 app-to-app, Ā£ā to landlines (literally can't do it).
3. Viber ā Cheap Rates, But Subscription Layers Complicate It
Viber Out ā their paid calling feature ā lets you call regular phone numbers. Rates to the US start around Ā£0.02āĀ£0.03/min. That's competitive. But Viber pushes you toward monthly subscription plans (called "Viber Out subscriptions") that bundle minutes to specific countries.
Here's what most people miss: those subscriptions don't carry over. Use 80 of your 200 monthly minutes and you lose the rest. Pay Ā£4.99/month for a US bundle and your effective rate climbs if you call infrequently. The per-minute rate only looks good if you're consistently using what you pay for.
There's also a connection fee on some routes ā typically 1ā3 pence ā that doesn't show up in the headline rate. Small individually, but it adds up across dozens of calls.
You can see how Viber stacks up on specific routes on the Viber alternatives page.
Real cost: moderate, but subscription waste is a real risk for irregular callers.
4. Google Voice ā Good for US Numbers, Limited Everywhere Else
Google Voice works well if you need a US number and make most of your calls to the US. From the UK, it's less useful than it sounds. Creating an account requires a US phone number for verification ā which most UK users simply don't have. And while calls to US numbers are free from within the US, calling internationally from Google Voice is billed at standard per-minute rates.
More fundamentally, Google Voice is built around US infrastructure. It doesn't offer UK local numbers. It doesn't give you a shared team balance. It's not optimised for outbound calling from the UK.
If you're evaluating it as a business tool, the Google Voice alternatives page is a practical starting point.
Real cost: low for US-to-US, awkward and restricted for UK-based callers.
5. Microsoft Teams Phone ā Powerful, but Priced for Enterprise
Microsoft Teams replaced Skype for Business in 2025. Teams itself is widely used, but Teams Phone ā the PSTN calling add-on that lets you dial real phone numbers ā costs extra. In the UK, the Teams Phone add-on runs Ā£8/user/month on top of your existing Microsoft 365 licence. That's before you add a calling plan.
Per-minute rates through Teams Phone aren't especially low. The per-seat pricing model means a 10-person team pays 10Ć what a solo user pays. For occasional international callers, the fixed monthly cost rarely justifies itself.
The Teams Phone alternatives page covers this in more detail, including how it compares to browser-based options for teams that don't need the full Microsoft stack.
Real cost: high fixed overhead, justified only if you're already deep in Microsoft 365 infrastructure.
Side-by-Side: Real Cost to Call the US From the UK
| Service | Monthly Fee | Per-Minute (USA) | Landline Support | No App Required |
|---|---|---|---|---|
| GlobCall | Ā£0 | ~Ā£0.016 | ā | ā |
| Ā£0 | N/A | ā | ā | |
| Viber Out | Ā£0āĀ£4.99 | ~Ā£0.02ā0.03 | ā | ā |
| Google Voice | Ā£0 | ~Ā£0.02 | ā | ā |
| Teams Phone | Ā£8+/user | ~Ā£0.03ā0.05 | ā | ā |
These numbers reflect 2026 published rates. Your actual rate depends on destination, connection type, and whether you're calling mobile or landline. You can check destination-specific rates on the full rates page.
What "Cheapest" Actually Means for UK Callers
The per-minute rate is only one variable. Here's the full picture.
Connection fees are the silent tax. A Ā£0.01 connection fee sounds trivial ā but on a 30-second call, you've just doubled your effective rate.
Seat-based pricing hits teams hard. We've written about why seat-based VoIP pricing costs more than businesses expect. If you're paying Ā£8/seat across 15 team members, that's Ā£120/month before a single call is made.
App requirements add friction. Any service that requires your recipient to install software ā or requires you to use a specific app ā isn't really a phone replacement. Browser-based calling works from any device, any OS, without IT involvement.
Then there's coverage. Nigeria costs $0.33/min. The Philippines costs $0.46/min. Japan landlines cost $0.15/min. The headline rate to the US doesn't tell you what you'll pay when a client in Lagos calls you back. Always check rates for your actual destinations.
Frequently Asked Questions
Can I make international calls from the UK without a SIM card?
Yes. Browser-based VoIP services like GlobCall work over WiFi or any internet connection ā no SIM required. You can call regular landlines and mobiles in 100+ countries directly from a browser tab. Our guide to calling without a SIM card using WiFi explains the full setup.
Is VoIP calling from the UK legal?
Completely legal in the UK. VoIP is regulated under Ofcom's general framework for electronic communications. The only restrictions apply to specific call types (e.g. emergency services), not to VoIP itself.
What's the cheapest way to call India from the UK?
VoIP rates to India start around $0.08/min (roughly Ā£0.06/min), compared to Ā£1.00āĀ£2.00/min through a standard UK mobile carrier. That's a 15ā30Ć difference. Check the India calling page for current rates.
Do I need to tell the person I'm calling that I'm using VoIP?
No. From the recipient's perspective, it's a normal phone call. They don't need any app, account, or special setup.
How does VoIP quality compare to a regular call in 2026?
With a stable broadband connection (10 Mbps is more than enough), VoIP call quality is indistinguishable from a carrier call. The main risk is packet loss on poor connections ā but on UK broadband, that's rarely an issue.
The Bottom Line
Carrier rates from the UK are genuinely punishing for international calls. VoIP alternatives range from solid to gimmicky, and the headline rate rarely tells the full story.
Here's what actually matters:
- WhatsApp is free, but only works app-to-app ā useless for calling businesses or landlines
- Viber Out has fair rates but subscription waste hurts irregular callers
- Google Voice is built for US infrastructure, not UK-outbound calling
- Teams Phone carries heavy per-seat costs that only make sense at enterprise scale
- GlobCall offers pay-as-you-go rates from Ā£0.016/min, no monthly fees, no seat charges, and works from any browser
If you make international calls from the UK ā whether daily or a few times a month ā the maths on VoIP is straightforward. You're not giving anything up in quality. You're just paying a fraction of what your carrier charges.
Try your first call at GlobCall.com/call. No download. No contract. Just dial.
