CallataGuidesBusiness phone system for offices of certified public accountants in Denver, CO
Offices of certified public accountants in the Denver-Aurora-Centennial, CO metro area: 793 establishments in 2023, the local area codes, and what phone service costs a 12-person team.
- Establishments
- 793CBP 2023
- Employees
- 9,399mid-March 2023
- Per 100k residents
- 26.0U.S. 16.2
- Rank
- 13th of 864areas by count
The accounting firm market in Denver, CO
County Business Patterns counts 793 offices of certified public accountants (NAICS 541211, Offices of Certified Public Accountants) in the Denver-Aurora-Centennial, CO metro area for 2023. They employed 9,399 people in mid-March and paid $1.0 billion in annual payroll. By establishment count the area is 13th out of 864 areas with published figures for offices of certified public accountants.
Measured against its 3.1 million residents (2024 estimate), the area has 26.0 offices of certified public accountants per 100,000 people; the U.S. rate is 16.2, so Denver, CO is 60.5% above the national figure. The average establishment here has 11.9 employees, compared with 11.0 nationally. Payroll per employee comes to $107,692, 7.0% above the national $100,691.
| Measure | Denver, CO | Colorado | United States |
|---|---|---|---|
| Establishments | 793 | 1,516 | 55,052 |
| Mid-March employees | 9,399 | 13,085 | 604,209 |
| Annual payroll | $1,012,193,000 | $1,271,317,000 | $60,838,681,000 |
| Employees per establishment | 11.9 | 8.6 | 11.0 |
| Payroll per employee | $107,692 | $97,158 | $100,691 |
| Establishments per 100,000 residents | 26.0 | 25.4 | 16.2 |
Census County Business Patterns 2023 (mid-March employment; annual payroll). Employees and payroll flagged high-noise are shown but not used in the text. Residents: Census Vintage 2024 estimates.
Establishment size: offices of certified public accountants in Denver, CO
Of the offices of certified public accountants in Denver, CO that had employees in March 2023, 73.2% had fewer than five (the U.S. share is 64.8%). 87.9% had fewer than ten. For a business of a few people, phone coverage is a staffing question as much as a technology one: someone has to be free to pick up, or the call needs somewhere sensible to go.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 580 | 73.2% | 64.8% |
| 5–9 employees | 116 | 14.6% | 18.8% |
| 10–19 employees | 51 | 6.4% | 9.2% |
| 20–49 employees | 15 | 1.9% | 4.3% |
| 50 or more employees | 30 | 3.8% | 2.9% |
Employment-size classes count establishments by mid-March 2023 employment. Establishments with no March employees are excluded from the size classes, so shares are of establishments with employees. Source: Census County Business Patterns 2023.
What offices of certified public accountants in Denver, CO use the phone for
CPA firms see sharp call peaks around filing deadlines, when the same small staff answers questions from many clients at once. Capturing every call and routing it to the right preparer keeps deadline weeks manageable.
Calls an accounting firm in Denver, CO might handle in a typical week include:
- The firm calls a client to request a signature.
- A client calls about a notice from a tax agency.
- A small business owner calls to ask about bookkeeping help.
Business texting for offices of certified public accountants
Firms text document reminders and let clients know when returns are ready to sign.
Team texting on Callata runs from your business number, so replies come from the practice or shop rather than someone's personal phone. It turns on after the one-time $49 carrier registration (10DLC) is approved.
Callata vs. per-seat pricing for offices of certified public accountants in Denver, CO
The average accounting firm in Denver, CO has 11.9 employees, so a 12-person team is a reasonable benchmark. Priced per seat, 12 users would run $360.00 a month on RingCentral RingEX Core and $299.40 on Ooma Office Pro (month-to-month list prices, checked September 28, 2026). Callata comes to $239.00 a month for 12 users ($99 a month with 5 users included, then $20 per additional user), below both.
Over a year, that is $1,452 less than RingCentral for an accounting firm in Denver, CO of that size. Annual contracts lower some competitors' prices, so compare the plan you would actually sign.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $239.00 | $2,868.00 |
| Quo (Starter) | $19.00 per user | $228.00 | $2,736.00 |
| Nextiva (Core) | $23.00 per user | $276.00 | $3,312.00 |
| Ooma (Office Pro) | $24.95 per user | $299.40 | $3,592.80 |
| Dialpad (Standard) | $27.00 per user | $324.00 | $3,888.00 |
| RingCentral (RingEX Core) | $30.00 per user | $360.00 | $4,320.00 |
Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.
Local area codes for offices of certified public accountants in Denver, CO
NANPA records place the exchanges of the area's named cities and towns in 4 area codes. 303 has the most, with 740 of 1,472 exchanges (50%). A local number lets clients in Denver, CO call without dialing out of area. Callata includes up to 3 local numbers, and which numbers are open in an area code depends on carrier inventory when you choose.
| Area code | Exchanges | Time zone | In service since | Overlay with |
|---|---|---|---|---|
| 303 | 740 | Mountain | 1947 | 720, 983 |
| 720 | 693 | Mountain | 1998 | 303, 983 |
| 983 | 32 | Mountain | 2022 | 303, 720 |
| 719 | 7 | Mountain | 1988 | none |
Exchanges are NANPA-assigned central office codes (NPA-NXX) in the rate centers matched to the area's named places. Source: NANPA utilized code and NPA reports.
Setting up Callata for an accounting firm in Denver, CO
Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.
Porting a number you already use in Denver, CO is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.
AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.
Avoid sending taxpayer identification numbers or full financial details by text.
Frequently asked questions
How many offices of certified public accountants are there in Denver, CO?
Census County Business Patterns counted 793 offices of certified public accountants in the Denver-Aurora-Centennial, CO metro area in 2023. They employed 9,399 people in mid-March.
What does a business phone system cost for a 12-person accounting firm?
At month-to-month list prices checked September 28, 2026, 12 users cost $360.00 a month on RingCentral RingEX Core and $299.40 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $239.00.
What area code should an accounting firm in Denver, CO use?
Area code 303 has the most assigned exchanges among the area's named places, followed by 720 and 983. If you already have a local number, you can port it to Callata for free.
Can an AI receptionist answer calls for an accounting firm?
Yes. Callata's optional AI agents can answer when the team is busy or closed, take a message, text, email or transfer the call. They disclose that they are AI and are billed from prepaid AI minutes at $0.25 per minute. Avoid sending taxpayer identification numbers or full financial details by text.