How to catch up your books

You're not the first business owner to let bookkeeping slide. Here's how to dig out.

First, stop trying to start from today

This is the most common mistake people make when catching up on late bookkeeping: they open up their accounting software, look at the current month, and try to make sense of the mess.

Don't do that.

Your starting point isn't today. Your starting point is the last month where your books were actually clean — meaning the last time your bank accounts were fully reconciled and your balances matched your statements.

In QuickBooks Online, you can find this by going to Reports > Reconciliation Reports. QBO saves a report every time you complete a reconciliation. The most recent one on file? That's month one.

If there are no reconciliation reports at all, pull up your bank statements and find the last month where your ending balance matches what QBO shows. That's your starting line.

Work forward one month at a time

Once you have your starting point, resist the urge to jump to the current month. Work forward, in order, one month at a time.

It feels slower. It might be slower. But it's the only way to make sure errors don't stack on top of each other. A miscoded deposit in February will quietly follow you into March, April, and every month after that — compounding into a mess that gets harder to untangle the longer you wait.

One month, clean it up, move on. That's the method.

And don't try to do it all in one sitting. Block an hour, close one month, come back to the next when you're ready. You'll get through it faster than you think.

What "closing a month" actually means

For each month you're working through, here's the short version of what needs to happen:

1. Get the data current. Before you run a single report, make sure all your transactions are categorized. In QBO, go to Transactions > Bank Transactions and make sure there are no items sitting in "For Review."

2. Reconcile every account. This is non-negotiable. Every bank account and credit card needs to be reconciled against your actual statement.

3. Review the Balance Sheet. Most small business owners skip this and go straight to the Profit & Loss, but the balance sheet is where errors love to hide. Run it with a "Previous Period" comparison and look at the $ change column — this will quickly surface items that were coded to a balance sheet account when it shouldn't have been.

4. Review the Profit & Loss. Now look at the part you actually care about: did you make money? Drill into Total Income to make sure all those transactions are real sales. Scroll through your Total Expenses detail and check that vendors are in the right categories. Compare to the prior month and look for anything that doesn't pass the common-sense test.

5. Do a final sanity check. Does your net income reflect how the month actually felt? If you had to put personal money into the business to survive, but your P&L is showing record profit, something’s probably off.

It might not be perfect — and that's ok

When you're working through old months, some things probably won't be 100% correct. Records get lost. Memory fades. Old transactions don't have enough detail to categorize with confidence.

Make your best judgment call and move on. Done is better than perfect. A categorized transaction in the wrong bucket is still better than an uncategorized transaction that's holding everything else up.

Once you're caught up, keep it that way

Here's the payoff: once you've done the hard work of catching up, the monthly close gets dramatically easier. Most business owners who do this regularly can close a month in under an hour.

The key is doing it every month — before the pile gets high enough to feel overwhelming again.

To make that easier, use a monthly checklist.

The Monthly Books Review Guide

Want more context? The full guide goes deeper, explaining why each step matters, what red flags to look for, and how to handle common problems like uncleared transactions, undeposited funds, and owner's draws.

It's written for solopreneurs and small business owners using QBO, and it's designed to feel like having a bookkeeper walk through the process with you.

Grab the full Monthly Books Review Guide here.

You don't have to be a numbers person to keep your books in order. You just need a clear process and the willingness to sit down with it once a month.

Don’t have the time or patience for doing it yourself? Hand your books over to a professional!