Bookkeeping cleanup
Bookkeeping cleanup checklist
A cleanup starts with a period that was never closed and a client who may not know what is missing. This checklist covers what to collect before the cleanup: the statements for every month in scope, the sales and payroll records behind the deposits, the loan and asset details, and the decisions the client needs to make about opening balances. Collect it in one pass so the cleanup does not stall on a missing month.
Who sends itSent by the firm when a new or existing client needs prior periods caught up, usually before a tax return, a loan application or a change of bookkeeper. The firm sets the period in scope before sending the list.
0 of 26 ticked
01Scope and handoff
02Bank and card records
03Sales, payroll and expenses
04Balances and adjustments
05Review and sign-off
What firms get wrong
- Starting the cleanup before the period and the ending balance are agreed, which makes the finish line move.
- Reconciling to a transaction export when the bank statement is available, which hides timing differences and bank errors.
- Posting every unexplained deposit to sales, which overstates revenue and creates a tax problem.
- Cleaning up a year that already has a filed return without checking whether the changes require an amendment.
- Leaving the client's questions in an email thread instead of one list the client can answer item by item.
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Questions about this checklist
How far back should a bookkeeping cleanup go?
Go back to the last period that was reconciled and agreed to a tax return. If the prior return used numbers that cannot be supported, extend the cleanup to the first month that can be. The firm should agree the period in writing before it starts.
What if the client cannot get an old bank statement?
Ask the client to request the statement from the bank first. If the bank cannot provide it, document the request and use the transaction export, a canceled check or the prior bookkeeper's records to support the balance, and mark the month as estimated.
Can a cleanup be done before a tax return is filed?
Yes, and it is usually better to clean up before the return is prepared. If a return was already filed with numbers that the cleanup changes, the firm should discuss whether an amended return is needed.
How long does a bookkeeping cleanup take?
It depends on the number of accounts and months, and on how quickly the client can supply missing statements. A short cleanup of a few months is usually faster than a multi-year catch-up with missing records.
Who owns the cleaned-up books?
The client owns the accounting file and the records. The firm should return or transfer the file and the cleanup summary at the end of the engagement, and keep its own copy under the firm's retention policy.
Sources
- IRS: How long should I keep records
- IRS Publication 583: Starting a business and keeping records
- IRS: Recordkeeping for small businesses
Checked November 3, 2026. Tax rules, forms and thresholds change; confirm them with the IRS or your tax software before relying on them.
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