1. Recording credit-card payments as new expenses
The purchase normally creates the expense when the card transaction is recorded. The later payment from checking usually reduces the credit-card balance. Recording both as expenses can double the cost in the profit and loss statement.
2. Letting bank feeds replace reconciliations
A connected bank feed imports activity; it does not prove the account is complete and accurate. Reconciliation compares QuickBooks to the actual statement and identifies missing, duplicated, changed, or incorrectly dated transactions.
3. Putting too much into “materials” or “supplies”
When every purchase lands in one generic account, the reports become less useful. Contractors benefit from a small, consistent set of categories that distinguishes important cost types such as materials, subcontractors, equipment or rentals, fuel, and other recurring operating costs.
4. Mixing owner spending with business expenses
Personal charges, owner draws, reimbursements, and contributions should be distinguishable from true operating activity. If they are buried in expense categories, the profit and loss statement can overstate business costs.
5. Recording equipment-loan payments entirely as expenses
A financed equipment purchase can create an asset and a liability, while later loan payments may include principal and interest. Posting every payment to one expense category can leave the loan balance wrong and distort expenses.
6. Duplicating customer deposits or payments
A deposit may be recorded through invoicing and then added again from the bank feed. Review the path from invoice or sales entry to payment to bank deposit so the same receipt is not counted twice.
7. Ignoring the balance sheet
Old credit cards, stale loans, unexplained liabilities, negative bank balances, or owner-equity problems can remain hidden when the owner only checks sales and expenses. The balance sheet is a core part of the monthly review.
8. Waiting until tax season to ask questions
By year-end, it is harder to remember why a supplier charge was unusual, which job a cost belonged to, or whether a deposit was customer money or owner funding. Resolve unclear items monthly while the information is still easy to recover.
Frequently asked questions
Which mistake causes the biggest reporting problems?
Unreconciled accounts are one of the most important warning signs because they can hide missing and duplicate activity across the entire file.
Can these mistakes be fixed through a QuickBooks cleanup?
Often, yes. A cleanup can address historical reconciliations, duplicate or uncategorized transactions, loan balances, owner activity, and other bookkeeping inconsistencies, depending on the records available.
How can a contractor prevent the same problems from returning?
Use a documented monthly close: reconcile every account, review uncategorized activity, review the balance sheet, resolve open questions, and keep supporting documents for significant transactions.
Practical checklist
- Credit-card payments reviewed for duplicates
- All financial accounts reconciled
- Expense categories kept consistent
- Owner transactions separated
- Equipment financing reviewed
- Customer deposits checked for duplication
- Balance sheet reviewed
- Open questions resolved monthly
This guide provides general bookkeeping information. Plutus Bookkeeping LLC provides bookkeeping services only and does not provide tax-return preparation, tax advice, legal advice, payroll compliance advice, or specialized construction accounting.