Bookkeeping is the organized recording and verification of a business’s financial activity. It turns contracts, invoices, receipts, bank transactions, payroll reports, loans, and owner contributions into accounts that can be reconciled and reported.

Good bookkeeping is not merely downloading bank activity or assigning categories. It establishes what happened, which entity it belongs to, when it belongs, how it was authorized, and how an independent record confirms the balance.

The basic accounting equation

The balance sheet follows the relationship:

Assets = Liabilities + Equity

Assets include cash, receivables, inventory, prepaid expenses, and equipment. Liabilities include bills, loans, payroll obligations, sales tax, and customer deposits. Equity represents owner contributions, distributions, and accumulated results under the entity’s accounting.

Income and expenses change equity through profit or loss. Every complete double-entry transaction has equal debits and credits, but a balanced entry can still be wrong if it uses the wrong account, entity, amount, or period.

Core financial accounts

The chart of accounts should be detailed enough for decisions and tax preparation but not filled with duplicate or one-time categories. Use customers, vendors, classes, departments, locations, or projects for dimensions that do not need separate general-ledger accounts.

Source documents

Keep contracts, invoices, receipts, purchase orders, bank and card statements, payroll registers, loan statements, tax filings, deposit records, mileage logs, and approval evidence. A bank transaction proves that money moved, not why it was a business expense or whether it was assigned correctly.

The IRS states that records should support income, expenses, and credits and that the system may be designed for the business. Records also help management monitor operations, prepare statements, and support returns. Capture documents promptly and link them to the transaction.

Cash versus accrual

Cash-basis records generally focus on when money is received or paid, subject to tax rules and exceptions. Accrual records generally recognize earned revenue and incurred expenses in the relevant period, using receivables, payables, prepaids, deposits, and accruals.

A business may maintain management books one way and prepare tax information with adjustments under a permitted method. Label reports clearly and preserve book-tax reconciliations. Do not switch a tax method simply by changing a software report setting.

Routine bookkeeping workflow

1. Collect complete source records through a secure, consistent process.
2. Verify the entity, date, amount, counterparty, business purpose, and approval.
3. Record customer invoices, vendor bills, payroll, cash, debt, and other activity through the correct module.
4. Review imported transactions and prevent duplicate entries from integrations and bank feeds.
5. Match receipts and payments to open customer and vendor documents.
6. Reconcile accounts to statements and subsidiary ledgers.
7. Record supported period-end adjustments and review financial reports.
8. Lock or protect the accepted period and retain the close package.

Bank reconciliation

A bank reconciliation compares the bank’s ending balance with the books after accounting for valid timing differences such as outstanding checks and deposits in transit. Investigate duplicate imports, omitted transactions, bank fees, interest, unauthorized activity, stale checks, and payments recorded in the wrong account.

Reconcile every bank, credit card, processor, loan, and restricted-cash account. The person who can initiate and release payments should not be the only person reconciling them. In a very small business, the owner should review statements, payees, unusual transfers, and reconciliation reports.

Accounts receivable and payable

Accounts receivable tracks customer invoices, credits, payments, disputes, and aging. Review overdue balances, unapplied cash, negative balances, duplicate invoices, and customer concentration. Prompt, accurate billing and disciplined follow-up improve cash flow.

Accounts payable tracks vendor bills, credits, due dates, and payments. Match the vendor, terms, purchase authorization, receipt of goods or services, calculation, tax, and bank details. Detect duplicate bills and verify vendor-payment changes independently.

Payroll and tax liabilities

Reconcile payroll expense, employee net pay, employer taxes, deductions, benefits, reimbursements, and every liability to payroll reports, bank activity, and filings. A payroll provider performs assigned tasks, but the employer should review employee lists, rates, bank accounts, filings, notices, and payment confirmations.

Track sales tax, payroll tax, income-tax payments, and other obligations in liability or appropriate accounts rather than burying all payments in expense. The tax return, payment, and ledger should reconcile.

Month-end close

• Confirm all expected statements, feeds, invoices, bills, and payrolls are present.
• Reconcile cash, cards, processors, receivables, payables, payroll, taxes, debt, and equity.
• Review uncategorized, suspense, negative, stale, and unusual balances.
• Record approved accruals, prepaids, depreciation, deposits, and corrections.
• Compare results with prior periods, budget, operations, and cash.
• Issue the reports, document review, and restrict post-close changes.

Financial reports

The income statement shows revenue, expenses, and profit over a period. The balance sheet shows assets, liabilities, and equity at a date. A cash-flow statement explains changes in cash across operating, investing, and financing activity. Receivable aging, payable aging, project reports, and cash forecasts provide operational detail.

Read reports together. Profit does not equal cash, and a positive bank balance may include customer deposits, tax money, loan proceeds, or unpaid bills. Compare reports to the reconciled ledger and investigate unexpected trends.

Basic internal controls

Use named user accounts, multifactor authentication, least privilege, approval limits, audit logs, independent bank-detail verification, and regular access review. Separate authorization, custody, recording, and reconciliation when staffing allows. Protect backups and test data exports.

Owner review is essential in a small team. Review bank images, new vendors, payroll changes, refunds, credits, journal entries, write-offs, transfers, and access changes. Document compensating reviews when full separation is not practical.

How often to do bookkeeping

Record and review high-volume cash, sales, or payment activity daily. Process bills, invoices, payroll, and missing documents at least weekly. Reconcile and close monthly. Complete tax and annual tasks according to their due dates, with enough time for review.

Start with a clear bookkeeping system, follow a practical small-business bookkeeping workflow, and understand the difference between bookkeeping and accounting.