How to switch accountants without the hassle

Most business owners stay with an accountant they’ve outgrown for one reason: they think switching will be a painful, awkward, risky ordeal. It isn’t. The hard part is deciding to do it — the mechanics are handled almost entirely by your new firm, and the whole thing is usually done in a couple of weeks. Here’s exactly how it works. If you are choosing again rather than for the first time, what to ask an accountant in Mission adds the questions that matter where practices change hands.

Signs it’s time to switch

You don’t need a dramatic reason. But if a few of these sound familiar, you’re likely overpaying in money, tax or stress:

• You only hear from them once a year, at filing time — never with proactive advice.
• Every phone call and email seems to show up on the bill.
• You’re passed around junior staff and never speak to the same person twice.
• They miss deadlines, or you’re always chasing them.
• They can’t explain your own numbers in plain English.
• You’ve grown — incorporated, added payroll, started charging GST, and they haven’t kept up.

An accountant should save you more than they cost and make your life simpler. If yours does neither, switching is a business decision, not a personal one.

The 5-step switch (and who does what)

Switching is more procedural than most owners expect, and almost none of it falls on you. Each step below says who does it and roughly how long it takes.

1. A first conversation with the new firm. Fit, a fixed fee, and what they take over. Your time: about 30 minutes.
2. Sign an engagement letter. Scope and fee in writing. Your time: a few minutes.
3. The new firm requests your records. A professional clearance letter to the previous accountant; you do not make the call. Your time: none.
4. Authorize the new firm with the CRA. Online or by signed form. Your time: about ten minutes.
5. Hand over and go. The new firm reconciles where it picks up. Your time: forwarding documents.

1. Have a first conversation with the new firm

Start with a free, no-obligation consult. A good firm will confirm they’re the right fit, quote you a fixed fee, and explain what they’ll take over. Nothing is committed until you say go. Your time: about 30 minutes.

2. Sign an engagement letter

This sets out the scope and the fixed fee in writing, so there are no surprises. Your time: a few minutes to review and e-sign.

3. The new firm requests your records

Professional standards require your new accountant to send a professional clearance letter to your previous one, requesting your prior-year files and working papers. This is routine and expected — you don’t make the call yourself. Your time: none.

4. Authorize the new firm with the CRA

You grant your new CPA access to your CRA business and personal accounts (a couple of clicks in My Business Account, or a signed authorization form). From that moment they can see your full history, balances and any open items. Your time: about ten minutes.

5. Hand over and go

The new firm reconciles where they’re picking up, and your filings carry on without a gap. Your time: minimal — mostly forwarding documents.

“But won’t I lose my history?”

This is the fear that keeps people stuck, and it’s unfounded. Your tax history is held by the CRA, not your accountant. Once your new CPA is authorized, they can see prior years’ returns, carryforward losses, capital cost balances, instalment payments and correspondence. The continuity is in your CRA account, and it moves with you automatically.

Do I owe my old accountant an explanation?

No. A brief, courteous note — “Thank you for your work; we’ve decided to move our accounting to another firm” — is more than enough. You don’t need to justify the decision or get into a debate. The professional clearance process handles the file transfer on its own.

One practical note: settle any outstanding invoice with them. A firm can withhold work product it prepared if there’s an unpaid bill, though your own source documents always belong to you. Clear the balance and the handover is friction-free.

When to make the move

The tidiest time is right after a year-end has been filed, when the previous accountant’s work is complete and there’s a natural line to draw. But don’t let timing trap you: if you’re facing a deadline or you’ve simply had enough, a capable firm can step in mid-year and take over the next filing. Waiting another full year with the wrong accountant usually costs more than switching now.

The bottom line

Switching accountants is one of the lowest-effort, highest-return decisions a business owner can make. The new firm does the heavy lifting, the CRA preserves your history, and you end up with someone who actually answers your emails. If you’ve been putting it off, the process is genuinely easier than the year you’ll spend if you don’t.

This article is general information for Canadian business owners and is current as of July 2026. It is not tax, legal or accounting advice, and it does not create a client relationship. Tax rules change and your situation is unique, so please speak with a CPA before acting on anything here.

Working through this locally? We advise owners on it as a Mission small business accountant.

If the timing points to a year-end handover, the first job a new firm takes on is usually the corporate return; T2 preparation sets out what we need from the previous accountant.