Calculate how much your business could save by switching from a traditional phone system to hosted VoIP, including line rental, call costs, maintenance, and hardware savings.
| Business Size | Lines | Avg. Current Cost/mo | Avg. VoIP Cost/mo | Avg. Monthly Saving | Avg. Annual Saving |
|---|---|---|---|---|---|
| Micro (1–5) | 2–5 | £120–250 | £60–120 | £60–130 | £720–1,560 |
| Small (6–20) | 5–15 | £400–900 | £180–450 | £220–450 | £2,640–5,400 |
| Medium (21–50) | 15–40 | £1,000–2,500 | £450–1,100 | £550–1,400 | £6,600–16,800 |
| Mid-Market (51–100) | 40–80 | £2,500–5,500 | £1,000–2,800 | £1,500–2,700 | £18,000–32,400 |
| Enterprise (100+) | 80+ | £5,000+ | £2,200+ | £2,800+ | £33,600+ |
Figures are based on UK market averages and include line rental, call charges, and maintenance. Savings vary by current provider, contract terms, and call volumes. International callers typically see higher savings. Talk to our VoIP team
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Most UK SMEs save 30-60% on their monthly phone costs when switching from traditional PSTN or ISDN lines to hosted VoIP, driven by lower line rental, cheaper call rates, and reduced hardware maintenance. A business with 10 lines paying £400/month on traditional telephony often drops to £150-£250/month on VoIP.
VoIP routes calls over your existing internet connection instead of dedicated copper phone lines, eliminating per-line rental fees and typically offering cheaper, often unlimited, UK call bundles. It also removes the need for on-site phone system hardware maintenance, a significant hidden cost of legacy PBX systems for UK SMEs.
Openreach is retiring the traditional analogue and ISDN phone network across the UK, meaning all businesses must move to VoIP or digital alternatives. Many UK SMEs are switching ahead of their local exchange stop-sell date to avoid a rushed, more expensive migration later — this calculator shows the savings on top of that requirement.
Yes, typically — most hosted VoIP providers offer significantly cheaper per-minute international rates than traditional carriers, and some include call bundles to common destinations. Businesses with high international call volumes often see the largest percentage savings of any VoIP use case, sometimes 50%+ versus legacy providers.
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