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Business phone system for offices of certified public accountants in District of Columbia

97 offices of certified public accountants operated in District of Columbia in 2023. Where they are, how big their teams are, and what phone service costs them.

Establishments
97CBP 2023
Employees
4,270mid-March 2023
Per 100k residents
13.8U.S. 16.2
State rank
51st of 51by count

The accounting firm industry in District of Columbia

County Business Patterns counts 97 establishments in District of Columbia classified as Offices of Certified Public Accountants (NAICS 541211) for 2023. They employed 4,270 people in mid-March and reported $667.4 million in annual payroll. That is the 51st highest count among the 51 states and DC with published figures. Offices of certified public accountants make up 0.41% of the 23,801 business establishments in the state.

Per 100,000 residents (2024 estimate) District of Columbia has 13.8 offices of certified public accountants, 14.7% below the national rate of 16.2. The average establishment has 44.0 employees against 11.0 nationally. Payroll per employee is $156,299, 55.2% above the U.S. figure of $100,691.

Offices of certified public accountants: District of Columbia compared with the U.S., 2023
MeasureDistrict of ColumbiaUnited States
Establishments9755,052
Mid-March employees4,270604,209
Annual payroll$667,397,000$60,838,681,000
Employees per establishment44.011.0
Payroll per employee$156,299$100,691
Establishments per 100,000 residents13.816.2

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.

District of Columbia's largest markets for offices of certified public accountants

Census published accounting firm counts for 1 metro or micropolitan area that include part of District of Columbia. The largest is Washington, DC-VA-MD-WV, with 1,059 establishments (a multi-state area; its count covers every state it spans).

Offices of certified public accountants by metro or micropolitan area, District of Columbia, 2023
AreaEstablishmentsEmployeesPer 100k residents
Washington, DC-VA-MD-WV1,05922,30016.5

Source: Census County Business Patterns 2023; population from Census Vintage 2024 estimates.

Team sizes at offices of certified public accountants in District of Columbia

51.1% of District of Columbia's offices of certified public accountants with employees had fewer than five people in March 2023, compared with 64.8% nationally. 71.3% had fewer than ten. At that size the phone is shared, so routing (who rings, when, and what happens after hours) matters more than the number of desk phones.

Offices of certified public accountants in District of Columbia by employment size, 2023
Employment sizeEstablishmentsShareU.S. share
1–4 employees4851.1%64.8%
5–9 employees1920.2%18.8%
10–19 employees88.5%9.2%
20–49 employees1010.6%4.3%
50 or more employees99.6%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 District of Columbia 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. That holds for offices of certified public accountants in District of Columbia as much as anywhere.

A few of the calls that come in to offices of certified public accountants in District of Columbia:

What offices of certified public accountants text about

Firms text document reminders and let clients know when returns are ready to sign.

Texting from a local number in District of Columbia requires carrier registration (10DLC), a one-time $49 fee on Callata.

Phone system pricing for a 44-person accounting firm

Offices of certified public accountants in District of Columbia average 44.0 employees, so the comparison uses a 44-person team. Per-seat business phone plans bill every one of those people. At month-to-month list prices checked September 28, 2026, 44 users on RingCentral RingEX Core cost $1,320.00 a month and 44 on Ooma Office Pro cost $1,097.80. Callata comes to $879.00 a month for 44 users ($99 a month with 5 users included, then $20 per additional user), below both.

Over a year, that is $5,292 less than RingCentral for an accounting firm in District of Columbia of that size. Annual contracts lower some competitors' prices, so compare the plan you would actually sign.

Monthly list price for a 44-person accounting firm
Provider (plan)Pricing basisPer monthPer year
Callata (Callata Office)$99 incl. 5 users, $20 per extra user$879.00$10,548.00
Quo (Starter)$19.00 per user$836.00$10,032.00
Nextiva (Core)$23.00 per user$1,012.00$12,144.00
Ooma (Office Pro)$24.95 per user$1,097.80$13,173.60
Dialpad (Standard)$27.00 per user$1,188.00$14,256.00
RingCentral (RingEX Core)$30.00 per user$1,320.00$15,840.00

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.

Area codes in District of Columbia

District of Columbia has 2 geographic area codes in service according to NANPA. Callata includes up to 3 local numbers, so an accounting firm can hold a number in more than one of them.

Area codes in District of Columbia by assigned exchanges
Area codeExchangesTime zoneIn service sinceOverlay with
202784Eastern1947771
77171Eastern2021202

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.

How Callata works for offices of certified public accountants in District of Columbia

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 District of Columbia 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 in District of Columbia?

97 in 2023, according to Census County Business Patterns. They employed 4,270 people in mid-March.

Which District of Columbia metro area has the most offices of certified public accountants?

Washington, DC-VA-MD-WV, with 1,059 establishments in 2023.

What does a phone system cost a 44-person accounting firm?

$1,320.00 a month on RingCentral RingEX Core or $1,097.80 on Ooma Office Pro at month-to-month list prices (checked September 28, 2026); $879.00 on Callata ($99 a month with 5 users included, then $20 per additional user).

Do I need to register to text customers from a District of Columbia number?

Yes. US carriers require business texting from local numbers to be registered (10DLC). On Callata the registration is a one-time $49 fee, and texting turns on once it is approved.