This one is for business owners who keep their own books, or who have someone keeping them, and who carry a quiet feeling that the numbers are not quite right. By year-end that feeling becomes expensive. A tax return built on unreliable books is either wrong or late, and often both. Here are five signs that a cleanup belongs on the calendar before December 31, and what to do about each one.
1. The books and the bank disagree
Open the balance sheet and find the cash balance for your main checking account. Now open the bank. If the two numbers are different, and the difference cannot be explained by a short list of outstanding checks and deposits in transit, the account has not been reconciled.
Reconciliation is the monthly habit that keeps books honest. It matches every transaction in the software to the bank statement, so nothing is missing, nothing is duplicated and nothing was entered twice at two different amounts. When it stops for a few months, errors stack up quietly. When it has never been done, the profit and loss statement is a guess.
What to do. Reconcile the most recent month first and work backward. The first month that will not reconcile is where the cleanup work lives.
2. The uncategorized pile keeps growing
QuickBooks Online and most other systems have a holding area for transactions that arrived from the bank feed and were never reviewed. The names differ. Uncategorized Income, Uncategorized Expense, Ask My Accountant, or a bank feed with hundreds of items waiting for review. The idea is the same.
A small pile is normal in the middle of a month. A pile that has grown all year means no one owns the books. Every item in it is a deduction that might be missed, income that might be misreported, or an owner draw that is about to be called an expense.
What to do. Sort the pile by payee. Most of it will be a dozen vendors repeated many times, and bank rules can clear those in one pass. What remains is the real list of questions for the owner.
3. The balance sheet has accounts no one can explain
The profit and loss gets all the attention. The balance sheet is where the problems hide. Look for a negative balance in a bank or credit-card account. An Opening Balance Equity account with anything in it. A loan whose balance has not moved since the day it was set up, even though payments go out every month. A payroll liability account that keeps growing. An Undeposited Funds balance larger than a week of sales.
Each of those is a specific error with a specific fix, and each one flows into the tax return. A loan that was never reduced means the payments were expensed in full, interest and principal together. That overstates expenses, and it will not survive a careful review.
What to do. Ask whoever keeps the books to explain every balance-sheet line in one sentence. The lines with no sentence go on the cleanup list.
4. Business and personal money share an account
If the business card paid for groceries this year, or the personal card paid for inventory, the books are carrying two lives at once. Mixed accounts take longer to reconcile, blur what the business actually earns, and weaken the separation an LLC is supposed to provide. They also make the return harder to defend, because every personal charge in a business account is a question waiting to be asked.
What to do. Open a dedicated business checking account and card if you have not already. Then record the personal items that already happened as owner draws or contributions, not as expenses. A cleanup does not erase the past. It labels it correctly.
5. Contractor payments are not tagged
If you paid anyone who is not an employee for services this year, you may owe them a Form 1099-NEC in January. For payments made in 2026, the federal reporting threshold is $2,000 to a payee for the year, and both the recipient copy and the IRS copy are due Monday, February 1, 2027. Those figures were verified October 3, 2026 against the IRS sources listed at the end of this article.
The deadline is not the hard part. The hard part is books where contractor payments are mixed into supplies, repairs or a general expense account, with no vendor record and no Form W-9 on file. Sorting that out in January, while vendors are slow to answer, is how 1099s go out late.
What to do. Pull a list of every vendor paid this year and mark the ones who are individuals or unincorporated businesses. Request a W-9 from each one now, and move their payments into a contractor expense account so the January filing takes minutes instead of days.
A short example
A service business (illustrative, not a client) comes to us in November with a bank feed holding nine months of unreviewed transactions, a loan that still shows its original balance, and an owner who has been paying for software on a personal card. None of that is unusual. The cleanup reconciles each month in order, splits the loan payments into interest and principal, records the software as an owner contribution, and tags three contractors for 1099s. The December close is the first one in the company’s history that matches the bank, and the return is prepared in February instead of on an extension.
Why before year-end
Two reasons. First, the books are the source of every number on the business part of your tax return. Cleaning them in December means the return is built on facts and filed on time. Cleaning them in March means the return waits until they are done. Second, planning still works in the fourth quarter. A retirement contribution, a purchase, an estimated payment or a decision about an S corporation election all depend on knowing the real profit. You cannot plan from a guess. If the difference between preparation and strategy is new to you, that article explains why the timing matters.
How a cleanup works at EZ Financial Fitness
A cleanup starts with a diagnostic review of your QuickBooks Online file. You receive a written summary of what is wrong, how far back it goes and a quote before any work begins. The cleanup itself goes month by month, each one reconciled and reviewed, and it ends with a balance sheet you can explain in one sentence per line. After that, monthly bookkeeping keeps it that way, with reports delivered to your Client Portal by the fifteenth of each month.
What to do next
If you recognized two or more of these signs, a cleanup is worth scoping now, while there is still time to use the results. Book a consultation and we will tell you plainly whether it is a cleanup, a catch-up or simply a few months of tidying, and what each one costs before you decide. If the next question is about the January estimated payment, this guide to the fourth-quarter deadline covers it.