Choosing a tax firm is unusually difficult because the thing you’re buying is hard to evaluate. You can’t easily tell whether a return was prepared well. If it’s wrong you may not find out for two years, and by then the person who prepared it may be unreachable.
So people choose on price, or proximity, or a recommendation from someone whose situation is nothing like theirs.
Here’s what actually distinguishes firms, in rough order of how much it matters.
Are they credentialed, and will they say so?
Covered in more depth elsewhere, but the short version: CPAs, Enrolled Agents, and attorneys hold recognized credentials with continuing education requirements, professional conduct standards, and unlimited rights to represent you if something goes wrong.
Anyone paid to prepare returns must have a preparer identification number and sign what they prepare. A preparer who won’t sign your return, or is evasive about credentials, has told you enough. Walk away.
Credentials are verifiable through public registers. You don’t have to take anyone’s word for it.
Can you reach them in July?
The most practically useful question, and it filters a surprising amount.
Tax questions don’t confine themselves to filing season. A notice arrives in August. You’re considering selling a property in September. Planning conversations are only useful in the autumn, when there’s still time to act.
A firm operating for ten weeks a year can file your return. It structurally cannot do the planning half of the job, and it won’t be there when the notice arrives.
Ask directly: what are your hours outside filing season, and who do I call?
Do they work with situations like yours?
Tax practice specializes more than most people realize. A firm handling mostly straightforward individual returns may be excellent at that and out of its depth with a multi-entity business. The reverse is equally true — and a firm built for complex business work may be an expensive place to file a simple return.
Ask what proportion of their clients look like you. A firm that mainly serves salaried individuals and takes on one construction business will be learning on your engagement.
Will they explain their reasoning?
You should finish every conversation understanding what was done and why.
This matters beyond comfort. The positions on your return are ultimately yours — you sign it, and you’re the one asked about it if it’s questioned. “My accountant handled it” is not a satisfying position to be in when you don’t know what was done.
A preparer who can’t explain a position in plain language either doesn’t understand it themselves or doesn’t think you’re entitled to. Neither is good.
Do they ever say no?
This one is counterintuitive, because a preparer who agrees to everything feels like a good preparer.
But some positions aren’t defensible. Some structures cost more than they save. Some deductions don’t hold up. A professional who never pushes back is either not paying attention or is comfortable taking positions you’d be uncomfortable defending.
The person to be wary of is the one promising an outcome before seeing your documents.
What happens if something goes wrong?
Worth asking before you engage, when the answer is hypothetical.
If a notice arrives on a return they prepared, is reviewing it part of the engagement or a new bill? If there’s an error on their side, what happens? Can they represent you, or will you need someone else?
Firms with good answers tend to give them readily. Vagueness here is informative.
Is the pricing clear before work starts?
You should get a specific number, in writing, covering specific work, before anything begins.
Hourly arrangements with no estimate, or “it depends, we’ll see,” make it impossible to know whether you’re being treated fairly. Scope changes happen — that’s fine — but you should be told before, not on the invoice.
Cheapest is rarely the right filter. Unpredictable is a genuine warning sign.
Practical signals
Good signs: asks about your situation before quoting; explains rather than asserts; raises things you hadn’t thought of; tells you when something isn’t worth doing; reachable outside filing season; comfortable with you understanding the return.
Warning signs: promises a refund before seeing documents; bases the fee on the size of the refund; won’t sign the return; vague about credentials; wants tax identification numbers by plain email; can’t explain a position; unreachable after April.
That email one is worth emphasizing. A firm asking you to send Social Security numbers or tax documents over ordinary email is telling you how it handles your data generally, and the answer is badly.
On switching
People stay with preparers they’re unhappy with because switching feels disruptive. It’s less so than expected — a prior-year return and some transcripts cover most of what a new firm needs.
The one thing worth doing carefully is making sure carryforwards transfer. Capital losses, depreciation schedules, basis in a business interest — these are the things that quietly disappear at a handover and are worth real money. A firm that asks about them is doing it properly.
Get in touch if you’d like to ask us any of these questions directly. We’d rather you asked.