The Open Index · Accounting and tax
Accounting and tax: the numbers, the rules, the AI picture.
10 sourced benchmarks, 8 rules that shape marketing, and what public data says about AI search for accounting firms. 25 sources, each linked at the bottom.
- 19graded sources
- 12industries
- 10case files
- Quarterlyrefresh
Written byKris GjorgjioskiKeyword research and industry benchmarks, Webtec Research
Checked byHristijan NajcheskiHead of SEO and AEO (technical and AI SEO), data verification
Updated October 15, 2026
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BENCHMARKS
What the research says about accounting firms, number by number.
Each card names its context and its source. Brackets match the source list at the bottom.
13.9%
New clients that financial advisors win from centers of influence such as CPAs and attorneys
Cerulli Associates, The Cerulli Report: U.S. Advisor Metrics 2025, released February 4, 2026. It measures advisors, not accountants, and shows what your referral partners value. Clients, friends and family were the top source at 54.2%.
[1] cerulli.com62%
Small businesses that cite rarely getting support as a reason to switch accountants
Xero's 2019 survey of small businesses, reported by Accountancy Age on June 12, 2019. Vendor data, UK-focused, sample size not stated. Limited industry knowledge (57%) and unresponsiveness (52%) followed. It measures stated triggers, not actual switching.
[2] accountancyage.com57%
US businesses that found their current accountant through a peer referral
TaxDome 2025 Niche Business Accounting Report, a survey of 350 US businesses with $1M to $100M in revenue, reported August 19, 2025. TaxDome sells practice software, so this is vendor data.
[3] cpapracticeadvisor.com82%
New accounting-firm clients who come from a referral source in a given year
Martin Bissett, CPA Trendlines, August 27, 2024. This is the author's estimate from 20-plus years of experience and research, with no stated sample. He names banks, lawyers and existing clients as sources.
[4] cpatrendlines.com3%
US businesses that chose their accountant through advertising
Same 2025 TaxDome survey of 350 US businesses. Online search is not reported separately, so this does not measure how many referrals searched the firm first.
[3] cpapracticeadvisor.com98%
Businesses that left a specialist and moved to another specialist
Same 2025 TaxDome survey. Businesses above $1M in revenue were also twice as likely to hire niche specialists. Vendor data on 350 businesses.
[3] cpapracticeadvisor.com36 months
How long Circular 230 requires you to keep direct mail and e-commerce solicitations and recipient lists
Section 10.30 of Circular 230, 31 CFR 10.30. A regulatory requirement, not a survey. It applies to practitioners who use public communications or private solicitations.
[5] law.cornell.edu500
Consumers whose unencrypted information triggers FTC notice within 30 days under the Safeguards Rule
FTC Safeguards Rule guidance for financial institutions, which lists tax preparation firms as covered. A regulatory threshold, not a survey.
[6] ftc.gov72.5 million
Returns e-filed by tax professionals through April 18, 2025
IRS filing season statistics for the week ending April 18, 2025, against 140.6 million individual returns received in total. Paid professionals handle roughly half of all returns, so the demand is large and the competition is dense.
[7] irs.gov13.2 million
Individual returns the IRS had received by January 31, 2025
IRS filing season statistics. By April 18, 2025 the IRS had received 140.6 million, so January held about 9% of the total (our calculation across two releases). The IRS notes early counts are incomplete.
[8] irs.gov
THE RULES
What accounting firms are allowed to say, and where it is written.
The rules and guidance that most often shape marketing in this industry, in plain English.
Circular 230, section 10.30: advertising and solicitation (31 CFR 10.30)
Practitioners may not use public communications or private solicitations that are false, fraudulent, coercive, misleading or deceptive. Enrolled agents and similar credential holders may not use the term "certified" or imply an employment relationship with the IRS. Fee information may be published, including fixed fees for routine services, hourly rates and fee ranges, but a practitioner may not charge more than the published rates for at least 30 calendar days after publication. For direct mail and e-commerce, a copy of the communication and a list of recipients must be kept for at least 36 months.
What it means: Check every credential on your website, bio and email signature against the wording the rule allows. If you publish a price, treat it as a commitment for 30 days. Keep a dated copy of every campaign, newsletter and ad, with the recipient list, for three years. Do not keep contacting a prospect who has said they do not want to be solicited.
[5] law.cornell.eduAICPA Code of Professional Conduct: advertising, commissions and referral fees (1.600.001, 1.600.010, 1.520.001)
A member in public practice may not seek clients by advertising or other forms of solicitation in a manner that is false, misleading or deceptive, and solicitation by coercion, over-reaching or harassing conduct is prohibited. Promotional efforts are misleading if they create false or unjustified expectations of favorable results, imply an ability to influence a court or regulator, or quote a fee when the member likely knew it would rise substantially. A member who pays or accepts a referral fee for recommending a CPA service must disclose it to the client, and a member must not do through others what the Code forbids the member to do directly.
What it means: Never write 'maximum refund' or 'we will win your audit' copy. Disclose any referral fee to the client, which matters if you pay a bank, lawyer or lead service for introductions. Review what your marketing vendor and review-management tools publish in your name, because you remain responsible for them. Audit and review clients carry an extra ban on commissions.
[9] mn.govState boards of accountancy: advertising and firm-name rules
The licence to practise as a CPA firm comes from your state, and so do the advertising and naming rules. Kansas, for example, bars advertising that is false, misleading or deceptive, bars using the name of a non-CPA or an unregistered firm in advertising CPA services, and judges violations against the AICPA Code. A 2009 AICPA and NASBA working paper, which is non-authoritative, proposed that names are misleading if they mislead about the firm's legal form or owners, create false expectations of favorable results, or imply influence over a regulator.
What it means: Register your firm name before you print it, and check the exact name on your website, profile and letterhead. A name that implies an entity form, owners or specialization you do not have invites a board complaint. Multi-state firms need to check each state they serve, because rules and wording differ.
[10] law.cornell.eduSection 7216 consent rules for marketing with client return data (26 CFR 301.7216-2 and 301.7216-3)
A tax return preparer may not use or disclose tax return information without the taxpayer's knowing, voluntary and signed written consent, unless an exception applies. A preparer may keep a separate list of client names, addresses, phone numbers, entity type and return form number, and use it to send educational tax information or to solicit more tax return preparation, but not to solicit any other service or product. Marketing statistics must be anonymous and cannot state an aggregate drawn from fewer than ten returns, and an average refund may not appear in marketing. Consent to solicit non-tax products must name each product, and a preparer may not ask for it after handing the completed return over for signature.
What it means: Do not market wealth management, insurance, loans or payroll to your tax clients from their return data without signed consent that names the product. A newsletter with tax updates is fine. An 'our average client saves $X' claim is not. Treat the client list as a restricted asset, and never sell or transfer it except with the sale of the practice.
[11] law.cornell.eduFTC Safeguards Rule (GLBA) and IRS Publication 4557: protecting client data on your site and in your systems
The FTC lists tax preparation firms as examples of financial institutions covered by the Safeguards Rule. The rule requires a written information security program with a designated Qualified Individual, a written risk assessment, access controls, encryption of customer information in transit and at rest, multi-factor authentication, an incident response plan, and notice to the FTC within 30 days of discovering unauthorized acquisition of unencrypted information on 500 or more consumers. Firms holding information on fewer than 5,000 consumers are exempt from some provisions. IRS Publication 4557 (Rev. 6-2024) says the definition of financial institutions includes professional tax preparers and points firms to Publication 5708 for a written plan template. In an August 18, 2026 release (IR-2026-92) the IRS reminded tax and accounting professionals that federal law requires a written information security plan.
What it means: Your website is part of the program. Contact forms, document portals and chat widgets collect customer information, so they need encryption, access controls and a vendor you have vetted. Do not ask for Social Security numbers in a web form or email. Add the plan to your marketing checklist, because a redesign that changes the intake form changes your risk.
[6] ftc.govCAN-SPAM Act and the TCPA (47 CFR 64.1200) for outreach
The FTC says CAN-SPAM covers all commercial email, including business-to-business email. Messages need accurate headers, a non-deceptive subject line, an ad identification, a valid postal address and a clear opt-out that you honor within 10 business days. The FTC page lists penalties of up to $53,088 per violating email, and you stay responsible when a vendor sends for you. For phones, FCC rule 47 CFR 64.1200 requires prior express written consent for autodialed or prerecorded telemarketing calls and texts to wireless numbers. It also restricts calls to numbers on the National Do Not Call Registry and bars residential telephone solicitations before 8 a.m. or after 9 p.m.
What it means: A cold email to a lawyer or banker is not exempt because it is business to business. Add your address and opt-out to every campaign, and suppress unsubscribes across every tool. Do not text prospects from a list without written consent. Keep a do-not-contact list for tax-season cold outreach, and see Circular 230 for the separate record-keeping duty.
[12] ftc.govFTC Consumer Reviews and Testimonials Rule, Google review policy and client confidentiality
The FTC rule took effect on October 21, 2024. It bars fake reviews, paying for positive reviews, undisclosed insider reviews and review suppression through intimidation or unfounded legal threats. Google's Maps policy is stricter: it bars offering payment, discounts or free services in exchange for a review, bars review gating (asking only happy customers) and removes reviews with a conflict of interest, such as those from employees. In the UK, ICAEW guidance says a testimonial is fine only if the client has consented, because the firm and client relationship is confidential.
What it means: Ask every client the same way, with no gift and no 'leave five stars' script. Never write reviews yourself or ask staff and family to post them. When you reply to a review, give no client details, because a public reply can disclose a confidential relationship. In the US the AICPA Code has a Confidential Client Information Rule (1.700.001) and Section 7216 limits use of return data.
[13] ftc.govOutside the US: Canadian CPA bodies and the UK (ICAEW)
In Canada, provincial CPA bodies set the conduct rules, and Rule 217 covers advertising, solicitation and endorsements. CPABC says a registrant may not solicit in a manner that is persistent, coercive or harassing, must stop when a prospect asks, and may run seminars and distribute technical information. In the UK, the ICAEW Code of Ethics (R115.2) bars marketing that brings the profession into disrepute. ICAEW also says advertising must conform to the Advertising Standards Authority, and that UK GDPR and PECR usually require a positive opt-in for marketing emails and texts.
What it means: A Canadian or UK firm cannot reuse a US page. Opt-in rules are stricter in the UK, and Canadian firms follow their provincial body and Canada's anti-spam law, which this page does not cover. Check your own regulator before you publish, and use a local adviser for cross-border campaigns.
[14] icaew.com
This is general information, not legal or compliance advice. Rules differ by credential, state or province and country, and they change. Confirm every page, post, email and ad with your own counsel, your state board and the IRS before publishing.
AI SEARCH LENS
What public data says about AI search here
The public studies we cite do not publish a figure for this industry, so we show none rather than guess. See the cross-industry picture on AEO by industry.
Industry categories in public studies are approximate matches. Full explanations: click impact, who AI cites.

Cite this page.
How we help accounting firmsCITE THIS PAGE
Webtec Research. (2026, October 15). Accounting and tax: benchmarks, rules and AI search data. The Open Index by Webtec. https://www.trywebtec.com/resources/index/industries/accounting-tax/
SOURCES
Sources and notes
25 sources collected by our research team for this industry. Brackets in the text match these numbers. AI-search figures link to the source library, where each is graded.
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A LIVING REFERENCE
Refreshed every quarter.
We re-check every source in January, April, July and October, add new studies and retire old ones. This is Edition 1 (October 15, 2026); the next is due January 2027. Changes are logged on the methodology page.






































































