What "reconciling" actually means
Reconciliation is just matching: does every transaction in your accounting software (or spreadsheet) match a real transaction on your bank and card statements? When they agree, you know your books reflect reality. When they don't, something needs fixing — a missing entry, a duplicate, or a charge you don't recognize. Do this for every business account, one month at a time, through the end of December.
The simple process
- Start with statements, not memory. Download the full-year bank and card statements (or pull the monthly ones). The statement is the source of truth; your books are the thing being tested.
- Match each transaction. Tick off every statement line against an entry in your books. Most accounting tools can import statements and suggest matches — review them rather than blindly accepting.
- Work chronologically. January through December, one month at a time. Small discrepancies found early are easy; the same ones found in December feel like detective work.
- Check the balances. After matching a month, the closing balance in your books should equal the statement balance. If it doesn't, the difference is the exact size of the mystery you need to solve.
Common problems you'll find
Duplicates
A payment recorded twice — once from an automatic feed import and once entered by hand. Common around busy periods. Delete the duplicate, don't just ignore it.
Missing transactions
Cash purchases, e-transfers, and auto-renewals are the usual suspects. Add them with whatever documentation you have (see Guide 1's receipt system).
Mystery charges
Small recurring debits you don't recognize are often subscriptions that started with a free trial months ago. Identify them, decide if you still want them, and cancel what you don't.
Uncleared items
Checks written but not yet cashed, or transfers still in transit at month-end. These explain legitimate timing differences — note them, don't delete them.
Watch for: personal transactions mixed into business accounts. This happens to almost every small business owner at least once. Move or clearly label them so your accountant isn't guessing in tax season.
Why finish before December 31
Two reasons. First, your year-end financial statements — the profit-and-loss and balance sheet your accountant will want — are only as trustworthy as the reconciliation behind them. Second, errors found in January can require corrected statements, amended entries, or awkward questions you can't answer because the trail has gone cold. December you, with the receipts nearby and the memory fresh, is the best detective available.
Set a recurring habit
Year-end reconciliation shouldn't be an annual event. A monthly 30-minute rec — or weekly if transaction volume is high — keeps December's job to a final review rather than a full excavation. Put a recurring block on next year's calendar (Guide 5 covers the full money calendar).