Twilio SMS pricing: how a US texting bill is built

So a one-segment text to a Verizon customer costs $0.0133 in per-message charges, and across an even mix of the three big carriers about $0.01264 a segment. The monthly and one-time lines decide whether a small sender pays a few dollars or a few dozen, which is what the worked bill further down shows.

“All in” = Twilio's $0.0083 plus $0.00434, the average long code carrier fee over a mix of one third AT&T, one third T-Mobile and one third Verizon (the 10DLC cost calculator's default).

The curly apostrophe is the trap owners fall into most: it arrives by pasting copy from a word processor, and it doubles the cost of a text that looks short. Twilio offers Smart Encoding, which swaps characters like curly quotes for their plain versions, and it recommends keeping texts under 320 characters. Its platform accepts up to 1,600. Before a campaign goes out, paste the copy into the SMS segment counter: it flags the character that forced UCS-2 and shows the segment count, which is the number Twilio multiplies.

Two things in that table cost owners money. First, the carrier fee averages about half of Twilio's own rate, so a budget built on $0.0083 alone comes up about a third short. Second, the carrier fee never gets cheaper with volume. Twilio's 10DLC fee article says volume pricing can apply to Twilio's fee, but because the carrier fee is passed through, “every message segment is charged the same fee.” Inbound texts carry fees too on AT&T, T-Mobile and US Cellular, so every reply a customer sends adds to the bill.

Every campaign also carries a one-time $15 vetting fee, then its monthly fee: Charity $3 and Emergency $5 alongside the three in the table. Twilio bills the monthly fee at approval and then every month “unless the Campaign is deactivated/deleted”, so a campaign you stopped using still bills until you delete it. A Low Volume Mixed campaign is capped at 2,000 segments a day toward T-Mobile.

The registry raised its fees on 2025-08-01: brand registration from $4 to $4.50, standard vetting from $40 to $41.50, a vetting appeal from $10 to $11, and a new $12.50 charge each time a public for-profit brand has to retry Authentication+. Twilio's own A2P 10DLC product page still showed the older $44 and $4 brand fees on 2026-10-22; the help-centre article carries the current ones, and this guide uses those. The 10DLC registration cost calculator runs these same Twilio figures over a year, next to four other providers' published fees.

Toll-free numbers skip 10DLC but have their own gate. Twilio blocks texts from an unverified toll-free number to the US and Canada (error 30032), quotes about three to five business days for review, and sends 3 segments a second by default once verified. Its verification article, read for this guide, names no fee for the verification itself; the costs are the higher rent and the same per-segment prices. Which route fits a small sender is weighed in 10DLC vs toll-free.

Twilio also sells optional add-ons per outbound text: the Engagement Suite (link shortening, click tracking, scheduling) at $0.015 with the first 1,000 free each month, and the Compliance Toolkit at $0.015. Either one costs more per text than Twilio's own rate, so switch it on deliberately. The Traffic Optimization Engine starts at $300 a month and is for high-volume senders.

Twilio exempts failures that are its own doing (internal errors, account suspension, its SMS pumping protection, geographic permissions) and messages its Compliance Toolkit blocks. It does not exempt the ones that come from your list: invalid numbers (errors 21211 and 21614) and numbers that have opted out (error 21610), which its fee article names among the most common causes. At a tenth of a cent the fee is small; what it measures is not. A steady stream of 21610 failures means your system keeps trying to text people who said STOP.

Dental clinic: Low Volume Standard brand, one Low Volume Mixed campaign. Retailer: Standard brand (vetting included), two Standard campaigns. Taxes and Twilio's volume discounts are left out; Twilio says discounts are agreed with its account team, and they never touch the carrier line.

Look at where the money goes. For the clinic, the per-segment lines still make up most of a small bill, and the one-time registration nearly doubles month one. For the retailer, almost everything is per segment, which is why its two-part promotions matter: cutting each one to a single segment would save about $252.80 a month at this volume, more than the whole year of its campaign fees ($240.00).

The last row is the one to fix in your own system, not in Twilio's settings. Twilio's help centre says that if you send from more than one long code or toll-free number, you “must take additional action separate from Twilio” to stop those customers being texted from your other numbers. Keep one opt-out list across every number and platform, and read any opt-out the customer words in their own way too: the rule is laid out in SMS opt-out keywords and TCPA rules for text messages.

If the bill still looks wrong for your volume, compare providers on the same lines rather than on headline rates: Twilio alternatives covers teams moving an existing registration, and the best SMS API providers compares how each handles opt-outs and registration. This guide is about cost and is not legal advice.

1. Twilio: SMS pricing in the United States (rates, carrier fees, numbers, add-ons)fetched 2026-10-22
2. Twilio Help Center: Pricing and fees for the A2P 10DLC servicefetched 2026-10-22
3. Twilio: A2P 10DLC product page (still showing pre-August-2025 brand fees)fetched 2026-10-22
4. Twilio Help Center: Carrier pre-check error fees (failed message processing fee)fetched 2026-10-22
5. Twilio Help Center: Support for opt-out keywords (SMS STOP filtering)fetched 2026-10-22
6. Twilio Help Center: Toll-free message verification for US/Canadafetched 2026-10-22
7. Twilio Docs: What the SMS character limit is (segments and encoding)fetched 2026-10-22
8. Twilio Docs: Programmable Messaging and A2P 10DLCfetched 2026-10-22
9. Twilio Docs: Troubleshooting and rectifying Campaignsfetched 2026-10-22
10. Twilio Docs: Error 30034, message from an unregistered numberfetched 2026-10-22
11. Twilio Docs: Error 30032, toll-free number has not been verifiedfetched 2026-10-22
12. Twilio Docs: Error 21610, attempt to send to unsubscribed recipientfetched 2026-10-22
13. 47 U.S.C. § 227, Restrictions on use of telephone equipment (govinfo, 2023 edition)fetched 2026-10-22