First, check that the firm is the problem
Switching firms fixes a capability or reliability problem. It does not fix a scope problem, and the two feel identical from the client side.
If your close is late every month because your provider is unresponsive, that is a firm problem and a new one will fix it. If your close is late because you send bank statements on the 20th and answer coding questions in batches every few weeks, no firm will fix that, and you will repeat this exercise in eighteen months.
The other common misdiagnosis is buying the wrong tier. A bookkeeper who cannot answer whether a product line is profitable is not underperforming — bookkeeping does not include that analysis. What you need is a controller or CFO layer, which may well be available from the firm you already have.
- Deadlines slip repeatedly and the explanation changes each time
- You find errors your provider should have caught, more than occasionally
- Nobody can answer a question about your numbers without a week of lead time
- The balance sheet has not been fully reconciled in over a year
- Your business has moved into complexity they have never handled — inventory, multi-entity, multi-state payroll, an audit
- Turnover means you have re-explained your business three times in two years
Have the conversation first
A direct conversation naming the specific failures resolves a real share of these situations, and it costs you nothing but one meeting. If the response is defensiveness or another promise with no change to how the work is staffed, you have your answer and you have lost two weeks.
Know what you own before you give notice
This is the step people skip, and it is the one that turns a clean transition into a painful one. Assume nothing will be handed over gracefully, and collect it while the relationship is still cordial.
- Admin access to your own accounting file. If the file lives under your firm's account rather than yours, transferring ownership is the entire ballgame. Do this before anything else.
- A full backup or export. Company file, general ledger detail, and trial balances for every closed year.
- The last three years of filed tax returns, including all schedules and any depreciation schedules and fixed asset registers.
- Payroll records — quarterly 941s, annual 940, W-2s and state filings.
- Reconciliation support: bank reconciliation reports and the documentation behind material balance sheet accounts.
- Access to every connected system — payroll, bill pay, expense tools, the point of sale, and any integration your firm set up under their own credentials.
Time it to a clean boundary
The single biggest determinant of how painful a transition feels is when you start it.
A fiscal year boundary is ideal. The old firm closes the final year, the new firm opens with a clean beginning balance sheet, and the handoff has an unambiguous line through it. A quarter boundary is the next best thing.
The middle of a month is the worst, because the transaction detail for a partial period sits half-coded in a file two teams are touching. Mid-audit and the four weeks before a tax deadline are also poor choices, for obvious reasons.
One caveat that overrides all of this: if the current books are materially wrong, waiting for a tidy boundary just adds months of bad data. Switch immediately and treat the cleanup as part of onboarding.
The 60-day sequence
A competent transition overlaps the two firms deliberately. The point of the overlap is that the outgoing team is still reachable while the incoming team finds the surprises.
- Days 1-10. New firm runs diagnostics on a read-only copy: chart of accounts, reconciliation status, revenue recognition treatment, anything that looks unusual. You have not given notice yet.
- Days 10-15. Diagnostic findings come back with a scope and a price that reflects the real state of the books rather than what you described on the first call.
- Day 15. Give notice to the current firm, in writing, with a specific final deliverable and date. Professional courtesy is 30 days, and you want the relationship functional, not warm.
- Days 15-30. Collect the document list above. Transfer system ownership. New firm rebuilds the chart of accounts if needed and sets the close calendar.
- Days 30-45. Old firm closes their final period. New firm shadows that close and reconciles to it.
- Days 45-60. New firm runs the first close alone. Expect it to be slower than the steady state, because this is where the undocumented judgment calls surface.
Do not skip the diagnostic
Any firm that quotes you a monthly fee without looking at your file is quoting a fantasy. They will discover the real condition of the books in month two and come back with a cleanup invoice. Insist on a diagnostic before you sign, and expect to pay a modest fee for it.
What competent onboarding actually includes
Use this as a checklist when you evaluate candidates. Firms that do these things say so up front, unprompted.
- A documented review of the opening balance sheet, with every material account tied to support
- A named primary contact and a named backup, not a shared inbox
- A published close calendar with the date your statements land each month
- A written list of what they need from you, when, and what happens if it is late
- A first-90-days plan that separates cleanup work from steady-state work, and prices them separately
- An explicit statement of what is out of scope — tax filing, sales tax, audit support — so it does not become a surprise later