The decision to switch accounting firms is usually made about six months before anyone actually does anything about it. You know the relationship isn’t working. You’ve known for a while. But every time you get close to acting on it, the same questions surface: What happens to all my records? Will this blow up my books mid-year? Do I have to explain myself to my current accountant? How do I even find someone new without wasting months on the wrong firm?
The transition itself is almost always simpler than the picture in your head. Three steps, the right sequencing, and a few things to know about timing — that’s the whole process. This article walks through each one in plain terms, including the parts most guides skip over.
Before You Do Anything Else: Get the Timing Right
The single most important thing to know about switching accountants is when not to do it. January through April 15th is tax season. Your outgoing firm is managing a high-volume workload. A new firm is doing the same. A transition in that window creates coordination problems at the worst possible moment for everyone involved.
The best window is May through September. After your return is filed, before the next filing season begins. Your new firm has time to get fully oriented, review prior returns, and understand your business before they’re responsible for your taxes. You arrive at the next April prepared, not scrambling.
If your situation is urgent — a significant planning failure, a notice that needs immediate attention, a relationship that has genuinely broken down — mid-year transitions are possible and sometimes necessary. They just require more careful coordination. A good incoming firm has managed this before and will tell you exactly what they need to make it work cleanly.
Step 1: Find Your New Firm Before You Say Anything to the Old One
This order matters more than most business owners realize. Notifying your current accountant before you have a replacement lined up puts you in an awkward in-between position — no current firm, no new firm, and an active tax year continuing in the background. Find the right replacement first. Then make the move.
Where to look
Most business owners start where they start everything: Google. That’s a reasonable first move. Searching “CPA for [your industry] in [your city]” or “accounting firm for $1M+ businesses California” will surface firms that have invested in being findable for exactly your situation. Pay attention to what comes up in the local pack — the map results with reviews — and read those reviews carefully. Not for star ratings, but for what clients actually describe. A pattern of “they’re proactive” and “they caught something my previous accountant missed” tells you something real. A pattern of “great at filing on time” tells you something different.
Google Business Profile reviews and independent platforms like Yelp are worth checking, but don’t stop there. A firm’s website content tells you a lot about who they actually serve. If their blog and service pages speak directly to the problems you’re dealing with — your industry, your revenue range, your California-specific situation — that’s a signal they’re oriented toward clients like you. A generic website that could belong to any firm anywhere is a different signal.
Referrals from other business owners in your industry or revenue range remain one of the highest-signal sources — not because your situation is identical to theirs, but because a firm that works well with a $3M construction company is more likely to understand your context than one that works primarily with individuals or startups. Your banker, your attorney, and your industry association contacts are also worth asking. The best accounting relationships often start with a trusted introduction, and the best online searches often end with a phone call to confirm what the reviews suggested.
For California businesses, wherever your search starts, look specifically for firms with demonstrated experience in California tax — the FTB, the pass-through entity election, the LLC fee structure, California’s treatment of S-corps. These aren’t edge cases. They’re the everyday context your accountant is working in, and a firm without California fluency will miss things a California-focused firm catches automatically.
What a good discovery call looks like
A first conversation with a prospective firm should tell you several things beyond whether they have capacity to take you on. How do they describe their approach to proactive communication? What does their onboarding process look like? Do they ask to see your prior returns and financial data before they quote you, or do they give you a number without context? A firm that wants to see your books before quoting is doing this right — they’re scoping what the work actually entails before committing to a price.
Pay attention to how they talk about the clients they serve. Do they demonstrate real familiarity with your industry? Can they speak specifically about the tax and accounting issues that show up at your revenue stage and in your business type? A generalist who has never worked with a business like yours has a learning curve that falls on you.
Three traits that consistently separate strong accounting relationships from adequate ones: how clearly they communicate financial information in terms you can act on, whether they work collaboratively with you and your team rather than operating as a black box, and whether they stay genuinely current on the tax and regulatory changes that affect your business. These traits reveal themselves in the first conversation if you’re listening for them.
One thing to watch for: a firm that makes sweeping promises before reviewing your financials is not being straight with you. Any firm worth working with will tell you what they can do for you after they understand what they’re working with — not before.
Step 2: Notify Your Current Accountant Professionally and Briefly
Once you’ve signed on with a new firm, it’s time to notify the outgoing one. This conversation doesn’t need to be long, and it doesn’t require a detailed explanation. “We’ve decided to make a change in our accounting relationship” is sufficient. Most accounting professionals have given and received this news before. Your job is to be professional and clear, not to justify or apologize.
Before you have this conversation, check your engagement letter if you have one. Some firms include a notice period — typically 30 to 60 days — before services formally end. Knowing this in advance prevents any confusion about timelines and lets you plan the transition accordingly.
Your new firm will typically coordinate the document transfer directly with your outgoing firm, which removes most of the friction from this step. You’re not personally responsible for shuttling files between two accounting offices. Once the notification is made and the new firm is engaged, the handoff coordination largely handles itself.
Step 3: The Records Transfer (It’s Your Data — Here’s How It Works)
The most persistent myth about switching accountants is that your records are somehow locked up in your current firm’s systems. They’re not. Your financial data belongs to you. Your prior tax returns belong to you. Your QuickBooks or accounting software data belongs to you. A professional outgoing firm cooperates with the transfer. If they don’t, you have legal and practical mechanisms for obtaining your own records regardless.
What gets transferred
The core items your new firm will need to get oriented: prior year tax returns (typically two to three years), your accounting software access or a data export, bank and financial account statements for the current year, any open IRS or FTB correspondence, and your current engagement letter with the outgoing firm so the new team understands what was in scope.
If you’re on QuickBooks Online or a similar cloud platform, the access transfer is straightforward — your new accountant gets added as an accountant user and the outgoing one gets removed. There’s no file migration, no data export headache. Cloud-based accounting systems have made this part of the transition significantly cleaner than it was a decade ago.
What your new firm will do with it
A well-run onboarding process starts with a review of your prior returns and current financial position. The new firm is looking for context — what was your prior-year tax strategy, what elections were made, what’s the current year-to-date picture, and where are the planning opportunities or open issues. This review is also where a strong firm will identify anything the previous engagement missed or left unresolved. That review is part of the value of switching, not a burden.
What to Expect in the First 60 to 90 Days
The first few months with a new firm are an orientation period for both sides. Your new accountant is learning the specifics of your business — your revenue model, your entity structure, your compensation setup, your California-specific situation. You’re learning how they communicate and what working together actually feels like in practice.
What you should expect: more questions than you’re used to, at least initially. A new firm asking a lot of questions in the first 60 days is a good sign, not an alarm. They’re building the context they need to advise you well. A firm that doesn’t ask questions and just picks up where the last one left off isn’t getting properly oriented.
What you should also expect, if you’ve switched to the right firm: the first proactive conversation that didn’t happen in your previous relationship. An observation about your entity structure. A heads-up about a California deadline. A question about a business decision you’re considering that has tax implications. That’s the difference you made the switch for — and it usually shows up faster than business owners expect.
The checklist version of this process is simple: find the right firm first, notify your current accountant second, let the records transfer follow. The harder part is making the decision to start. If you’ve been sitting on that decision, the process itself is not the obstacle.
Transition Checklist Before You Notify Your Current Accountant
Before you notify your current accountant:
- Identify and vet at least two prospective firms
- Have a discovery call with each — bring your prior-year return and a clear picture of your revenue stage and industry
- Confirm their California experience specifically (FTB, PTE election, LLC fee, S-corp treatment)
- Review their engagement letter and understand what’s in scope before signing
- Confirm you’re outside tax season (avoid January – April 15th if possible)
When notifying your current accountant:
- Review your existing engagement letter for any required notice period
- Send a brief, professional written notice (email is fine)
- Request cooperation with the records transfer to your new firm
Records to confirm are transferred:
- Prior year tax returns (minimum two to three years)
- Accounting software access (QuickBooks Online accountant access, etc.)
- Current year financial statements and bank statements
- Any open IRS or FTB correspondence or notices
- Payroll records if applicable
- Prior engagement letter so new firm understands what was in scope
Frequent Questions About Changing Accountants
Can I switch accountants in the middle of the year?
Yes, and it’s more common than most business owners realize. The main risk is switching during tax season (January through April 15th), when both firms are at peak workload and coordination is harder. Outside that window, a mid-year switch is entirely manageable with the right incoming firm guiding the process.
What if my current accountant won’t cooperate with the records transfer?
Your financial records belong to you, not your accountant. If an outgoing firm is uncooperative, you can request your records formally in writing, referencing the professional obligation to return client records upon request. In practice, most firms cooperate without issue. If yours doesn’t, your new firm can advise you on next steps, which may include contacting the California Board of Accountancy if the firm is refusing to release records they’re professionally obligated to return.
How long does the transition actually take?
The document transfer and initial review typically take two to four weeks once both firms are coordinating. Full onboarding — meaning the new firm has enough context to advise you proactively, not just process transactions — usually takes about 60 to 90 days. The first filing season after the switch is the true test of how well the transition was handled.
Will my new accountant see everything my old accountant did?
Yes — that’s intentional and useful. A new firm reviewing your prior returns and financial history will see the full picture of how your taxes were managed, what elections were made, what strategies were used, and what was potentially missed. This review is where most incoming firms identify planning opportunities the previous engagement overlooked. It’s one of the concrete benefits of switching to a more engaged firm.
Do I need to tell my current accountant why I’m leaving?
No. A brief, professional written notice is sufficient. “We’ve decided to make a change in our accounting relationship and will be transitioning to a new firm” is a complete message. You don’t owe a detailed explanation, a performance review, or an apology. If they ask for feedback, you can provide it or not as you see fit. The decision is yours to make without justification.
Have A Bad CPA? Switch Accountants Today!
At MBS Accountancy, we work with California businesses and nonprofits that are established but lacking financial clarity and a solid financial partner. If you’re ready to have an honest conversation about what your accounting relationship should look like at your stage, a free 20-minute call is the right starting point. We’ll ask to see your prior returns before we quote anything because that’s how a real assessment works.