Think in terms of cost per successful auth, not just message price. Twilio Verify charges a $0.05 base fee per successful verification, plus any applicable channel delivery fees. Your total cost depends on the channel you use, the destination country, and any carrier or related messaging fees.

For OTP-based channels, a verification is successful when the user enters the correct code and that code is approved by the Verify API. That is when the $0.05 base verification fee is charged.

If you create and validate your own custom passcodes instead of using Verify’s automated code generation, the verification fee is charged per created verification attempt.

No. You are not charged the $0.05 base verification fee for failed, expired, incorrect, or uncompleted verifications.

However, some underlying delivery attempts may still incur channel charges. For example, SMS or WhatsApp delivery attempts can still be billed even if the user never completes the verification flow.

The $0.05 base verification fee stays the same, but total cost varies by channel, destination country, carrier, and configuration.

For example, SMS and WhatsApp include channel-specific delivery charges, while some channels include delivery in the base fee or only bill when delivery or approval conditions are met. If you plan to use multiple channels or fallback logic, model total cost across the full auth flow rather than a single message attempt.

Channel delivery fees are billed alongside the $0.05 base verification fee and vary by delivery mechanism. Here's a breakdown of channel-specific fees:

• SMS: Message attempts are always charged and not subject to delivery ($0.05 per successful verification + $0.0083 per SMS (U.S. prices*)).

• Voice: Voice attempts are always charged and not subject to delivery ($0.05 per successful verification).

• Email: $0.05 per successful verification.

• WhatsApp: Only billed when delivery is confirmed ($0.05 per successful verification + $0.0147 per authentication template message (U.S.prices*)).

• Passkeys: Pilot program.

• Silent Network Auth: $0.05 per successful verification plus per-country channel fee. You will not be billed if we are unable to complete the SNA flow with the carrier.

• TOTP (authenticator apps like Authy and Google Authenticator): TOTP channel fee is included in the verification fee. It’s charged when a request is approved.

• Push and Silent Device Approval: Push channel fee is included in the verification fee. It’s charged when a request is approved or denied.

Yes, Twilio offers volume discounts and committed-use contracts for high-volume deployments. Custom enterprise pricing lowers both the $0.05 platform verification fee and underlying channel delivery costs (SMS, Voice, WhatsApp) across your entire Twilio account. Custom pricing is typically evaluated when monthly usage reaches 100,000+ verifications or combined messaging spends trigger enterprise thresholds.

The best forecast starts with successful verifications, then layers in retry rates, channel mix, destination countries, and fallback behavior.

To help control spend, teams can use Console spending caps, balance alerts, and usage monitoring. It is also worth budgeting separately for carrier surcharges, registration fees, and any optional add-ons outside the base verification fee.

The base $0.05 successful verification fee includes passcode generation, localized template translation across 42 languages, configurable TTL expiration, rate limiting, and automated SMS pumping protection via Verify Fraud Guard. Optional paid add-ons include pre-screening phone numbers via the Twilio Lookup API, procuring dedicated phone numbers/short codes, and premium 24/7 technical support SLAs. 

The standard Twilio Verify fee covers complete end-to-end passcode lifecycle management, including automated code generation, carrier-approved message templates with localized multi-language translation, configurable expiration time-to-live (TTL), rate limiting, and SMS pumping protection. Some optional paid add-ons include procuring dedicated brand short codes rather than the included managed pool, and upgrading to premium 24/7 support SLAs.