SIP Trunk Pricing Explained
SIP Trunk Pricing Explained (And What to Watch Out For)
SIP pricing can look simple—but often isn’t.
Some providers advertise low prices, then charge heavily for calls, add-ons or support.
The 3 common pricing models
1. Pay-as-you-go
Cheap upfront—but unpredictable bills.
2. Bundled minutes
Fixed allowance (e.g. 4000 minutes), then extra charges.
3. Unlimited plans
Fixed monthly cost for UK calls (best for most SMEs).
What small businesses should look for
- Clear monthly pricing
- Included UK calls (01, 02, 03 and mobile)
- Low-cost DDIs
- No long contracts
Hidden costs to watch
- Mobile call charges
- Setup fees
- DDI rental
- Support charges
Why predictable pricing matters
For most SMEs, the biggest benefit of SIP is budget certainty.
You don’t want to:
- monitor usage
- worry about spikes
- explain surprise bills
Bottom line
The best SIP pricing isn’t the cheapest—it’s the most predictable.
