Cost to Run a Small Call Center on Twilio: A Worked Example

Building a small call center on Twilio is a popular choice for businesses that want the flexibility of a programmable contact center without the licence cost of a traditional enterprise telephony system. The total monthly cost involves Twilio Flex or a custom-built routing layer, inbound and outbound voice charges, phone number rental, and potentially recording and transcription. This worked example models a 10-agent call center handling inbound customer calls 8 hours per day, 5 days per week.

Twilio Flex Platform Cost

For a 10-agent call center with agents working 8-hour shifts 5 days per week, each agent generates 160 active user hours per month (8 hours x 20 working days). Under Twilio Flex's consumption model at $1 per active user hour, 10 agents generate 1,600 active user hours per month, costing $1,600. Under the named user model at $150 per named user per month, 10 agents cost $1,500 per month. However, Twilio provides 5,000 free active user hours per month, which covers the full 1,600 hours for this size operation, making the Flex platform cost $0 per month for a 10-agent team working standard hours. The free tier is large enough to cover most small contact center operations entirely.

Inbound Voice Call Costs

A 10-agent call center where each agent handles 40 calls per day with an average handle time of 8 minutes processes 400 calls per day, or 8,000 calls per month. At 8 minutes per call, that is 64,000 call minutes per month inbound. Inbound calls to a local Twilio number cost $0.0085 per minute, giving an inbound voice cost of 64,000 x $0.0085 = $544 per month. If agents also have queue hold time averaging 3 minutes before connection, add 400 calls x 20 days x 3 minutes x $0.0085 = $204 in hold time billing, bringing inbound voice to approximately $748 per month. Queue hold time is one of the most frequently overlooked costs in call center budgeting.

Recording and Phone Number Costs

Recording all 64,000 call minutes at $0.0025 per minute costs $160 per month. If hold time is also recorded, add another $204 x ($0.0025 / $0.0085) = $60 in recording fees, bringing total recording to approximately $220 per month. Phone numbers for a 10-agent call center require at minimum one inbound customer-facing number, though most operations add a few additional numbers for redundancy or departmental routing. At $1.15 per number, 3 numbers cost $3.45 per month. If the operation also sends SMS follow-ups or appointment reminders, additional numbers and 10DLC compliance fees apply on top of the voice costs.

Total Monthly Cost and Cost Per Call

For a 10-agent call center handling 8,000 calls per month with the assumptions above: Flex platform $0 (within free tier) + inbound voice $748 + recording $220 + phone numbers $3.45 = $971.45 per month in Twilio infrastructure costs. The cost per call is $971.45 / 8,000 = $0.12 per inbound call in Twilio platform costs. Adding outbound calls, if agents make callbacks or follow-up calls averaging 2 minutes each at $0.013 per minute for 50 percent of handled interactions, adds 4,000 calls x 2 minutes x $0.013 = $104 per month. Total monthly Twilio cost: approximately $1,075, or $0.13 per call. This compares favourably to cloud contact center SaaS platforms that typically charge $50 to $150 per agent per month, or $500 to $1,500 per month for a 10-agent team.

Conclusion

A 10-agent call center built on Twilio costs approximately $1,000 to $1,200 per month in platform fees, well below comparable SaaS contact center costs at the same agent count, with the trade-off of requiring developer implementation and ongoing maintenance. Book a free cost model with our team and we will calculate the exact Twilio cost for your agent count, call volume, and operational hours.