A useful recordkeeping system lets you explain what happened without reconstructing a month from memory. Start by separating business activity from personal spending, then connect each entry to its supporting document.
Give business transactions a clear home
The Internal Revenue Service (IRS) Publication 583 recommends keeping business and personal checking accounts separate, identifying the source of deposits, and reconciling records with bank statements. Separate accounts make transactions easier to trace; they do not, by themselves, establish that an expense is deductible or guarantee legal protection.
Capture enough detail to understand each entry
For a practical working log, record the transaction date, amount, other party, business purpose, and a reference to the supporting document. Keep receipts, invoices, and relevant payment evidence together. The IRS guide to business records explains the types of supporting documents and information to preserve. Requirements depend on the transaction; a bank feed alone may not explain its purpose.
Keep owner transactions visible
Create a review list for money moving between an owner and the business. Before assigning a final accounting category, ask:
- Was this customer revenue, money the owner contributed, or borrowed money?
- Was an outgoing payment for a business purchase, a documented reimbursement, a loan repayment, or an owner withdrawal?
- Does employee compensation apply to this owner under the business’s tax classification?
- What documentation is missing, and who can confirm the correct treatment?
Do not label every deposit as sales or every owner payment as an expense. These questions are prompts for organizing records, not instructions to choose a tax treatment. The LLC and S-Corp overview explains why legal structure and tax classification need separate attention.
Use a small, repeatable review
- During the week: attach documents while the purpose is fresh and flag uncertain entries.
- At statement time: match recorded transactions to the bank statement, account for timing differences and charges, and investigate unexplained discrepancies.
- Before planning owner payments: review upcoming obligations using a dated cash plan. A reconciled balance describes recorded cash; it does not tell you everything the business will need next.
For a simple starting format, see LLC cash-flow basics and the worked cash-plan example. Adapt the review schedule to your transaction volume rather than allowing unresolved items to accumulate.
Keep records usable and secure
Choose a consistent filing approach that lets you retrieve an entry and its evidence together. Restrict access to people who need it and keep a recoverable copy. Before discarding records, check the retention rules that apply to the particular record and situation; there is no single retention period for every business document.