Falling behind on bookkeeping is common. A busy season, a staff change or a move to new software can leave months of transactions unrecorded or unreconciled. Catching up is very manageable if you work in the right order.

Step 1: Decide the starting point

Find the last date your books were reliable, usually the last month that was reconciled or the last tax return that was filed. Everything after that date is in scope. If the last return was prepared from different numbers than your books show, start by agreeing the opening balances to that return.

Step 2: Gather the source documents

  • Bank and credit card statements for every account, including closed ones
  • Payment processor and marketplace payout reports
  • Loan statements
  • Payroll reports and tax filings
  • Sales invoices and supplier bills
  • Receipts for significant expenses

The IRS describes the supporting documents a business should keep in what kind of records should I keep. Statements can usually be downloaded from online banking for past periods.

Step 3: Work month by month

Import or enter transactions one month at a time and reconcile each account before moving on. Working month by month means each reconciliation starts from a known, correct balance, so mistakes do not pile up. Our guide to monthly bank reconciliation explains the process.

Step 4: Categorise consistently

Use your chart of accounts consistently across the catch-up period. Set rules for recurring vendors, but review them; bank rules applied blindly are a frequent source of errors. Keep a short list of transactions you could not identify and ask about them in one batch rather than stopping work each time.

Step 5: Clear old balances

Catch-up work often uncovers old items: invoices recorded twice, payments never matched, or a balance left in an "opening balance" or suspense account. Investigate each and correct it with a clear note, rather than writing it off without explanation.

Step 6: Review payroll and sales tax

Check that payroll liabilities and sales tax payable on the balance sheet match what was actually filed and paid. Differences here can mean missed payments, and they are worth finding before a notice arrives.

Step 7: Stay current

The hardest part is not falling behind again. A simple weekly routine of categorising transactions and a monthly close with reconciliations keeps the books current. Many owners decide to hand this to a bookkeeper after a catch-up project.

Catch-up checklist

  • Last reliable date identified and agreed to the last filed return
  • Statements downloaded for every bank, card, loan and processor account
  • Each month reconciled before moving to the next
  • Unidentified transactions listed and resolved in batches
  • Old receivables, payables and suspense balances investigated
  • Payroll and sales tax liabilities agreed to filings
  • A weekly and monthly routine agreed so the books stay current

How long should records be kept?

The IRS explains retention periods in how long should I keep records. Keep the statements and documents you gathered for the catch-up with the books for those periods.

We handle catch-up projects as part of our bookkeeping services, then move to a monthly routine. Book a consultation to scope yours.