Performance Max comes with a tempting pitch for any business with happy customers: upload your customer list, and Google will go find more people like them. For a dentist or a roofer, that's a marketing decision. For a tax practice, it's a federal disclosure question, and the answer most firms would give without thinking is the wrong one.
This chapter covers Performance Max for accounting firms: when to start it, why the client list stays in the file cabinet, and what to feed Google instead. The short version: the websites your future clients already visit describe them better than your client list would, and using them doesn't require anyone's signature.
An Accounting Firm Earns Performance Max With Six Months of Search Inquiries
Performance Max is Google's all-in-one campaign. One budget and one set of assets run across Search, YouTube, Display, Gmail, Discover and Maps, with Google deciding where each dollar goes. That reach is why it waits.
A new account gives Google nothing to aim at. Performance Max decides where to show ads by studying which clicks turned into inquiries, and on day one there are none. So it comes after the Search work in Chapter 6, once Isolation and Exploration together are bringing in about 30 genuine prospect inquiries a month. For most small practices that happens in the sixth or seventh month. A busy firm in a big market may get there sooner. The trigger is the volume, never the calendar.
Search doesn't go away when Performance Max arrives. Google gives an Isolation keyword first claim on a search that matches it exactly. There's a catch: if the Isolation campaign runs out of budget for the day, Performance Max is allowed to pick up those same searches. So keep Isolation fully funded through tax season. The searches you built the account on shouldn't quietly become Performance Max's traffic because the exact-match budget ran dry by 2 p.m. on April 10.
A Tax Firm's Client List Is Tax Return Information. Uploading It Needs a Signed Consent Naming Google.
Here's the part other industries don't have to think about.
Google's Customer Match lets an advertiser upload customer emails and phone numbers to target them, exclude them, or show Google who to find more of. For most businesses, the questions are about privacy policies and consent banners. For a tax preparer, there's a federal statute in the way.
Section 7216 of the tax code makes it a crime for a tax return preparer to disclose tax return information without the client's written consent. The regulations define tax return information broadly. It includes a client's name, address and identifying details furnished in connection with preparing a return, and it covers that information even when it's compiled in a form that can't be traced back to one person. The criminal penalty runs up to a year in prison and a $1,000 fine, and a separate civil penalty adds $250 per disclosure, up to $10,000 a year.
The regulations do let a firm keep a list of its own clients' names, emails and phone numbers. But they say what it's for: contacting those clients with tax information or offering them more tax preparation services. And they say the firm "may not transfer the taxpayer list, or any part thereof, to any other person," except when selling the practice.
Our reading, and it's an interpretation, not IRS guidance: uploading tax clients to Customer Match is a transfer of that list to Google. That holds whether the upload is for targeting, for building lookalike signals or even just for excluding existing clients. Hashing the emails before upload doesn't change it; nothing in the rules makes an exception for scrambled data, and they reach information that can't identify anyone. The path that's open is written consent that meets the regulations: signed and dated, voluntary, naming Google as the recipient, stating the purpose, and never a condition of doing the return. For individual clients, the IRS's own procedure spells out required wording and a one-year default if no end date is given. Timing matters too: consent for marketing that isn't about tax preparation can't be requested after the finished return is handed over for signature.
Two more facts make this easier to decide. Google puts its own fence around the feature: the full set of Customer Match uses, exclusions included, unlocks only after 90 days in the account and more than $50,000 spent over its lifetime. A two-partner practice may never cross that line. And bookkeeping or payroll client data that never touched a return falls outside Section 7216 but inside the profession's own confidentiality rules, which also require the client's consent before it leaves the firm.
So for nearly every small practice, the practical answer is simple: Performance Max runs without the client list.
Competitor Websites Describe Your Next Client Better Than Your Tax Files Would
The good news is that the client list wasn't the best signal anyway. A custom segment is a portrait painted with web addresses: hand Google a handful of sites, and it looks for people whose browsing resembles them. Build the segments first, then attach them to Performance Max as audience signals.
For an accounting firm, three kinds of sites do most of the describing:
- Retail tax chains. People who use a chain storefront every spring are exactly the clients who outgrow it: a first rental property, a side business, a return that got complicated. Chapter 8 showed how often their loyalty is to one preparer, not the brand.
- Small business bookkeeping and payroll software. Owners who are doing their own books in an app are the future bookkeeping and tax clients. The day the app stops being enough, they start searching.
- Competing CPA firms in your market. The people reading their service pages are shopping for what you sell.
Building one takes a few minutes. In Audience Manager, create a custom segment, choose the option for people who browse websites similar to the ones you enter, and paste in five to ten addresses from one of the groups above. Make one segment per group rather than one big blend, so you can see later which kind of visitor turned into inquiries. Name them plainly ("Tax chain visitors," "Bookkeeping app users") so the report is readable in six months.
Leave one kind of site out: tax debt relief companies. Google treats debt-focused help as a sensitive category, with its own limits on how audiences can be used, and a firm's resolution work belongs in its own tightly controlled campaign, not blended into Performance Max's audience signals.
Keep your expectations honest, too. Google treats signals as suggestions. Its own help page says Performance Max can still reach people outside them when it thinks they're likely to convert. The signals point the campaign in the right direction for its first weeks. The inquiries that come in afterward do the real steering. Chapter 11 takes custom segments further, into Demand Gen.
Final URL Expansion Can Send a Stranger to the Client Portal. Exclude It Before Launch.
By default, Performance Max doesn't just send people to the page you chose. Final URL expansion, switched on in every new Performance Max campaign, lets Google swap in any page of your site it judges a better match for the search. Google admits in its own documentation that the swap sometimes lands on pages the advertiser never intended.
Chapter 1 found a client login on all 12 example firms' websites. Those are exactly the pages Final URL expansion shouldn't touch. A stranger who lands on a portal login can't do anything there, and some of those pages are the places a firm has worked hardest to keep ad tags away from.
Before launch, add URL exclusions for:
- client login and portal pages
- document upload and organizer pages
- invoice and payment pages
- careers and job listings
- tax debt and resolution pages, which carry their own sensitive-category limits
Leave the service pages open: individual tax, small business, bookkeeping, payroll, contact. Those are the pages a new client should reach, and letting Google choose among them is the useful part of the feature.
Performance Max Gets Your Best Headlines and the Partners' Photos. Your Brand Searches Stay With Search.
The rest of the build is about giving Google good material and keeping it off the searches it doesn't need.
- Goal: conversions. Use the same inquiry conversions the Search campaigns count: calls and forms from prospects. Don't feed it fee values from finished engagements; in our reading, importing "this click became a client worth $1,200" discloses exactly the client information Section 7216 protects.
- No cost-per-lead target at launch. Let it learn for a few weeks first, then add a target based on what the account is actually paying.
- Location: Presence. The same people-who-are-actually-here rule from Chapter 9, applied to every channel Performance Max touches.
- A brand exclusion for your firm's name. People searching your name already found you. Without an exclusion, Performance Max will happily serve on those searches and report the results as its own, which makes it look far better than it is.
- Your best Search headlines. Move in the lines from Chapter 8 that have earned the most inquiries, not a fresh batch written from scratch.
- Real photos and real video. Performance Max shows images and video on YouTube, Display and Discover. Give it photos of the actual partners and the actual office, and a short phone video of a partner explaining who the firm helps. Skip stock photos of handshakes and calculators, and skip Google's auto-generated assets. An accounting firm is selling trust in specific people; a stock model in a headset sells nothing.
- Negatives carried over. Apply the shared negative list from Chapter 5, so Performance Max doesn't rediscover the software shoppers and job seekers the Search campaigns already blocked.
Then watch it the way you watched Exploration: closely for the first month, and against the same question every time. Are these inquiries from people who might sign an engagement letter, or from people who wanted something else?
Next: Demand Gen and the First-Year Business Owner
Chapter 11 goes after people before they search: Demand Gen, custom segments built for new business owners, and the timing that puts a firm in front of them before their first business tax deadline.
Earlier chapters: Chapter 9 on settings, and Chapter 1 on keeping tags off client pages. The accounting guide's home page lists every chapter.
Building Performance Max for accounting firms without a single client name leaving the practice is part of our Google Ads management.
