CallataGuidesBusiness phone system for offices of certified public accountants in Ann Arbor, MI
Offices of certified public accountants in the Ann Arbor, MI metro area: 45 establishments in 2023, the local area codes, and what phone service costs a 9-person team.
- Establishments
- 45CBP 2023
- Employees
- 411mid-March 2023
- Per 100k residents
- 12.0U.S. 16.2
- Rank
- 168th of 864areas by count
How many offices of certified public accountants are in Ann Arbor, MI?
County Business Patterns counts 45 offices of certified public accountants (NAICS 541211, Offices of Certified Public Accountants) in the Ann Arbor, MI metro area for 2023. They employed 411 people in mid-March and paid $32.9 million in annual payroll. By establishment count the area is 168th out of 864 areas with published figures for offices of certified public accountants.
Measured against its 374,000 residents (2024 estimate), the area has 12.0 offices of certified public accountants per 100,000 people; the U.S. rate is 16.2, so Ann Arbor, MI is 25.6% below the national figure. The average establishment here has 9.1 employees, compared with 11.0 nationally. Payroll per employee comes to $80,114, 20.4% below the national $100,691.
| Measure | Ann Arbor, MI | Michigan | United States |
|---|---|---|---|
| Establishments | 45 | 1,349 | 55,052 |
| Mid-March employees | 411 (moderate noise) | 14,493 | 604,209 |
| Annual payroll | $32,927,000 | $1,370,832,000 | $60,838,681,000 |
| Employees per establishment | 9.1 | 10.7 | 11.0 |
| Payroll per employee | $80,114 | $94,586 | $100,691 |
| Establishments per 100,000 residents | 12.0 | 13.3 | 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.
How big offices of certified public accountants in Ann Arbor, MI are
Of the offices of certified public accountants in Ann Arbor, MI that had employees in March 2023, 58.1% had fewer than five (the U.S. share is 64.8%). 79.1% had fewer than ten. Small teams usually share the phone: the person who answers is often also serving a customer or doing the job, which is when calls get missed.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 25 | 58.1% | 64.8% |
| 5–9 employees | 9 | 20.9% | 18.8% |
| 10–19 employees | 6 | 14.0% | 9.2% |
| 20–49 employees | 3 | 7.0% | 4.3% |
| 50 or more employees | 0 | 0.0% | 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.
Calls an accounting firm in Ann Arbor, MI has to catch
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.
A few of the calls that come in to offices of certified public accountants in Ann Arbor, MI:
- A bank calls to verify a client's financial statements.
- A client calls to ask whether a missing tax form has been received.
- 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.
Because carriers require registration for business texting from local numbers, Callata files a 10DLC registration for a one-time $49; after approval, anyone on the team can reply from the business number.
What a phone system costs an accounting firm in Ann Arbor, MI
The average accounting firm in Ann Arbor, MI has 9.1 employees, so a 9-person team is a reasonable benchmark. Priced per seat, 9 users would run $270.00 a month on RingCentral RingEX Core and $224.55 on Ooma Office Pro (month-to-month list prices, checked September 28, 2026). Callata comes to $179.00 a month for 9 users ($99 a month with 5 users included, then $20 per additional user), below both.
Over a year, that is $1,092 less than RingCentral for an accounting firm in Ann Arbor, MI 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 | $179.00 | $2,148.00 |
| Quo (Starter) | $19.00 per user | $171.00 | $2,052.00 |
| Nextiva (Core) | $23.00 per user | $207.00 | $2,484.00 |
| Ooma (Office Pro) | $24.95 per user | $224.55 | $2,694.60 |
| Dialpad (Standard) | $27.00 per user | $243.00 | $2,916.00 |
| RingCentral (RingEX Core) | $30.00 per user | $270.00 | $3,240.00 |
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 Ann Arbor, MI
NANPA records place the exchanges of the area's named cities and towns in 2 area codes. 734 has the most, with 230 of 232 exchanges (99%). A local number lets clients in Ann Arbor, MI 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 |
|---|---|---|---|---|
| 734 | 230 | Eastern | 1997 | 679 |
| 269 | 2 | Eastern | 2002 | 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.
What offices of certified public accountants in Ann Arbor, MI get with Callata
For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.
Porting a number you already use in Ann Arbor, MI 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 Ann Arbor, MI?
Census County Business Patterns counted 45 offices of certified public accountants in the Ann Arbor, MI metro area in 2023. They employed 411 people in mid-March.
What does a business phone system cost for a 9-person accounting firm?
At month-to-month list prices checked September 28, 2026, 9 users cost $270.00 a month on RingCentral RingEX Core and $224.55 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $179.00.
What area code should an accounting firm in Ann Arbor, MI use?
Area code 734 has the most assigned exchanges among the area's named places, followed by 269. 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.