It's December, and the bookkeeping you meant to catch up on in the spring is now most of a year behind. You're not alone, and you're not out of time. Cleaning up before year-end means a calmer tax season and fewer missed deductions. Here's the plan.
1. Figure out where things stand
Identify the last month your books were truly reconciled. Everything after that point needs work. Also note any accounts that were never connected to your accounting system, such as a second credit card or a payment platform.
2. Gather every statement
Download bank, credit card, loan, payroll, and payment platform statements for the full catch-up period. Statements are the source of truth. Bank feeds alone can miss or duplicate transactions.
3. Work forward one month at a time
Start with the oldest month and reconcile each account to its statement before moving on. Errors carry forward, so fixing the earliest months first keeps you from fixing the same problem twice.
4. Clean up the categories
Recategorize transactions that landed in the wrong place, and empty out "uncategorized" and "ask my accountant" accounts. Look for duplicates, personal expenses paid with business accounts, and transfers between your own accounts recorded as income or expenses.
5. Fix the balance sheet
- Match unpaid customer invoices and unpaid bills to what's actually outstanding.
- Tie payroll expenses and liabilities to your payroll reports.
- Split loan payments into principal and interest, and match loan balances to lender statements.
- Make sure starting balances agree with last year's tax return.
6. Review before you call it done
Read the profit and loss month by month. Big swings or odd numbers usually point to something missed. Compare the year's totals to your tax return and to what you'd expect from the business.
7. Set up a routine so it doesn't happen again
Once the books are current, a monthly close keeps them that way. A set day each month to reconcile and review takes far less time than another catch-up project later.
When to get help
If you're more than a few months behind, have several accounts or entities involved, or have a tax deadline approaching, a professional cleanup is usually faster and cheaper than doing it yourself. Clean books are the starting point for everything else, from an accurate tax return to a loan application.
We'd resist the urge to start with this month. Fixing the oldest month first feels slower at the beginning and is much faster overall.