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Premium or Special Numbers
- Some countries have special “golden” or vanity numbers that cost more monthly.
- Toll-free lines might have per-minute surcharges for inbound calls.
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Advanced Languages
- Cloning a custom language model or adding a rare language may require a one-time setup fee.
- Example: “We can add X language for €49 if it’s not in our default list.”
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Bulk SMS or WhatsApp Integration
- If you add text-based notifications or confirmations, standard SMS rates or third-party WhatsApp fees may apply.
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Exceeding Plan Limits
- If your plan includes free minutes or campaigns, using more than allocated can lead to overage charges (pay-as-you-go rates).
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Regulatory / Compliance Charges
- Certain areas impose short-call surcharges, universal service fund fees, or e911 fees for VOIP solutions.
- Usually small, but can appear on your invoice as separate line items.
Tip: Keep an eye on your monthly invoice breakdown for a transparent view of each item. If something is unclear, contact billing support to clarify.

