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Bookkeeping

Seven Bookkeeping Mistakes That Quietly Cost You Money

When we take over a set of books, we tend to find the same seven problems. None of them announces itself. All of them cost real money — in taxes overpaid, loans mispriced, and deals delayed.

1. Commingled personal and business spending

The single most common finding. Personal expenses through the business account muddy your true margins, create audit exposure, and — critically — force lenders and buyers to discount your reported earnings because they cannot tell what's real.

2. Unreconciled accounts

If bank and credit card accounts haven't been reconciled monthly, your books are a guess. Duplicated transactions, missed income, and phantom balances accumulate silently. Every downstream number — profit, tax, loan application — inherits the error.

3. Miscategorized transactions

Equipment coded as expense, loan principal coded as expense, owner draws coded as payroll — each distorts both your tax position and your margins. Some miscategorizations overpay tax; others understate income and create penalty exposure. Both are expensive.

4. Cash transactions that never enter the books

Common in retail, food service, and trades. Beyond the compliance risk, unrecorded revenue permanently suppresses the valuation of your business — a buyer pays a multiple of provable earnings, and cash that never hit the books cannot be proven.

A buyer pays a multiple of provable earnings. Revenue that never hit the books cannot be proven — or paid for.

5. Receivables nobody is chasing

Invoices sent is not money collected. Without a maintained aging report, slow payers drift to ninety days and beyond, and some quietly become bad debt. You financed your customer's business interest-free and then wrote off the loan.

6. No monthly close

Books touched once a year, at tax time, mean you operated all year without instruments. The monthly close — reconcile, review, correct — is the discipline that makes every other number trustworthy.

7. Missing documentation

Deductions without receipts evaporate under examination. Contracts, invoices, and statements that can't be produced stall loan underwriting and due diligence. Document retention is boring precisely until the moment it's the only thing that matters.

The pattern

Each mistake compounds the others. Cleanup is almost always cheaper than its consequences — and it's a fixed, one-time cost, while the errors bill you forever.

Know where your books stand — before a lender or buyer tells you.

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