First, the part that matters most
Being behind on your bookkeeping and being behind on your filings are two different problems. The second one has deadlines and penalties attached and should be dealt with first.
If you have unfiled returns or missed payroll deposits, talk to a tax professional now, before the clean-up starts. Penalties for failing to file generally accrue faster than penalties for failing to pay, so filing something is usually better than filing nothing while you sort out the money. If you have received notices, do not leave them unopened; the response windows on them are real and they get shorter as the process escalates.
If the amounts are significant or there are several years involved, that first conversation belongs with a CPA, an enrolled agent, or a tax attorney rather than a bookkeeper. Clean-up produces the numbers. Deciding what to do about them is separate work.
What clean-up actually involves
The sequence is nearly always the same.
Gather. Every bank and card statement for the whole period, loan documents, payroll records, prior returns, and any notices. Most delays in clean-up projects are waiting on documents, so this stage is worth pushing through fast. Banks generally keep statements available online for a limited window and charge for older ones, so start there.
Rebuild. Every transaction gets entered and categorized. This is the bulk of the hours, and it is largely mechanical.
Reconcile. Each account is matched to its statements, month by month, until the records and the bank agree. This is the step that proves the work is right, and it is the step most abandoned DIY catch-ups skip.
Resolve. The questions that surfaced along the way: unidentified deposits, transfers that look like income, personal expenses in the business account, duplicate entries. Expect a list of questions only you can answer.
Close and hand off. Financial statements for each period, and a package your tax preparer can work from.
How long it takes
Honestly, it depends on transaction volume far more than on how many years are involved. A quiet business two years behind can be faster than a busy one six months behind. The realistic drivers are how quickly you supply documents, how many accounts are involved, whether payroll is in the mix, and how much personal and business spending is mixed together.
Any firm that quotes you a fixed timeline before seeing your statements is guessing. A reasonable process is a paid or unpaid diagnostic first, then a scoped quote.
What it costs, and why the range is wide
Clean-up is usually priced separately from ongoing monthly work, because it is a project rather than a service. Cost tracks transaction volume and mess, not calendar time. The things that raise it most are commingled personal spending, missing statements, cash transactions with no paper trail, and prior attempts at bookkeeping that have to be undone before the real work starts.
That last one is worth knowing. Partially-done books sometimes cost more to fix than empty ones.
What you can do to make it cheaper
- Download every statement for the whole period before the work starts, in PDF, organized by account and year
- Open a business account now and start using it exclusively, even mid-clean-up, so the mess has an end date
- Write down what you remember about unusual transactions while you still remember
- Gather loan documents, showing original amounts and payment schedules
- Collect W-9s from contractors you paid, before you need them
- Answer the question list promptly. It is the most common stall point
Then keep it from happening again
Almost every business we clean up got behind the same way: not through a crisis, but through a busy month that became three. The fix is a fixed monthly close date and someone whose job it is to hit it, whether that is a bookkeeper or a recurring appointment you keep with yourself.
Starting fresh from a clean set of books is a much easier habit to hold than starting from a backlog.