Catch-up bookkeeping: fixing months or years of missing books

What is catch-up bookkeeping?

It is the work of recording and reconciling past periods that were never booked, or were booked badly, until the books are complete and match the bank. It is usually needed before overdue tax returns can be filed, before applying for a loan, or before selling a business.

What do you need before starting?

• Every statement for every account the business used: bank, credit cards, loans, PayPal, Stripe, marketplace settlement reports.
• Sales records: invoices, platform reports and point-of-sale exports.
• Payroll and contractor records, including forms already filed.
• Loan agreements and statements showing interest and principal.
• Any returns already filed for the period, so the rebuilt books can be compared with them.
• Receipts and bills, however incomplete.

Download statements now even if you will not use them for weeks. Some banks and platforms only keep history online for a limited time.

In what order should you work?

1. Fix the starting point

   Use the last period that was correctly closed, or the date the business started. Record opening balances for every account at that date.

2. Set up the chart of accounts

   A short list of categories matched to the tax return. See bookkeeping basics.

3. Import transactions month by month

   Oldest first. Most accounting software can import statement files where bank feeds do not reach back far enough.

4. Categorize each transaction

   Match income to invoices or platform reports and expenses to bills or receipts where you have them.

5. Reconcile each month before moving on

   The book balance must match the statement at each month end. Differences found early are easy to trace. Found a year later, they are not.

6. Record the non-bank items

   Depreciation of equipment, inventory counts, amounts owed to and by the business, and accruals if you use accrual accounting.

7. Review and close each year

   Run the profit and loss and balance sheet, compare them with any filed returns, and lock the period.

Which items need the most care?

Transfers between you and the business

Money you put in is not income, and money you took out is not an expense. Record both as owner equity. For a foreign-owned single-member LLC they are also the transactions reported on Form 5472, so list them with dates and amounts.

Transfers between accounts

A payment from the bank account to a credit card, or a payout from a platform to the bank, is a transfer, not income or expense. Recording it as both is the most common catch-up error and inflates income and expenses together.

Platform payouts

Marketplaces and payment processors pay out net of fees and refunds. Record the gross sales, the fees and the refunds separately, using the platform's reports, so sales match any Form 1099-K.

Sales tax

Sales tax collected is owed to the state and is not income. If you collected it but did not file returns, that is a priority to fix. See how US sales tax works.

Loans

Split repayments into interest, which is an expense, and principal, which reduces the loan balance.

What if receipts are missing?

Bank and card statements show that money was paid and to whom. Supplement them with invoices from suppliers' portals, order confirmation emails and account histories. Where an expense cannot be supported and its business purpose is doubtful, leave it out rather than guess. Missing documentation is a common reason deductions are disallowed.

What comes after the books are current?

• Prepare and file any missing federal and state returns. See how to file back taxes for a business.
• Amend any returns that the rebuilt books show were wrong.
• Set a monthly routine so the books never fall behind again: categorize, reconcile, review.
• Or hand the routine over. See how much bookkeeping costs.

This guide is general information. It is not tax or legal advice for your situation.