Bookkeeping Basics for Small Business

Good bookkeeping starts with a few consistent habits.

You don’t need to become an accountant to understand the financial side of your business. A reliable bookkeeping system helps you know where your money is going, keep accurate records, prepare for tax time, and make better-informed decisions throughout the year.

This guide covers the small business bookkeeping basics every owner should understand, including monthly routines, financial statements, organized records, and common mistakes to avoid.

Start with the basics. Build from there.

Small Business Bookkeeping Basics: Monthly Checklist

A consistent monthly routine keeps small problems from becoming bigger ones.

Every business is a little different, but a reliable month-end routine should make sure the books are complete, reconciled, and ready to review. Keeping up with these tasks throughout the year is much easier than trying to reconstruct everything at tax time.

Review and categorize all transactions
Reconcile bank and credit card accounts
Review accounts receivable and outstanding customer invoices
Review accounts payable and upcoming bills
Review payroll and payroll liabilities, when applicable
Review sales tax liabilities and filing requirements, when applicable
Reconcile loans and other balance-sheet accounts
Review the Profit & Loss and Balance Sheet for unusual or unexpected balances
Organize supporting documents and resolve any outstanding questions
Close the books for the month once the review is complete

Key takeaway:

Don’t wait until tax season to find out what happened during the year. Regular monthly review gives you a much clearer picture of your business.

Understanding Financial Statements

Your reports tell the story behind the transactions.

Keeping accurate books is only part of the job. Financial statements turn all of those transactions into information you can actually use to understand how your business is performing.

Profit & Loss Statement

Shows your income and expenses over a period of time and helps you see whether the business is generating a profit.

Balance Sheet

Shows what the business owns, what it owes, and the equity remaining at a specific point in time.

Cash Flow Statement

Shows how cash moves into and out of the business and helps explain why profitability and the amount of cash in the bank are not always the same thing.

What to look for:

Trends matter more than isolated numbers. Compare results from month to month and year to year, and investigate anything that looks unusual.

Organizing Receipts and Source Documents

Good records make good bookkeeping possible.

A transaction in your accounting software tells you that money moved. The supporting document explains why. Receipts, invoices, statements, and other records provide the detail needed to classify transactions correctly and support the information in your books.

What to keep

A better system

Purchase receipts and vendor invoices
Customer invoices and sales records
Bank and credit card statements
Loan and financing documents
Payroll records
Records supporting business travel and vehicle expenses
Documents related to equipment and other significant purchases
Tax notices, filings, and payment confirmations

Separate business and personal transactions
Capture receipts while they are still easy to identify
Store documents electronically in clearly named folders
Use a consistent naming convention
Match supporting documents to the related transaction when practical
Review missing documentation during the monthly bookkeeping process
Back up important records securely

Key takeaway:

The best recordkeeping system is one you can maintain consistently. A simple, organized process is more useful than a complicated system that gets ignored.

Common Bookkeeping Mistakes

Small bookkeeping problems are easier to fix before they become big ones.

Most bookkeeping problems are not caused by complicated accounting. They usually begin with small inconsistencies that build up over time. Recognizing a few common trouble spots can help keep your books more reliable and much easier to manage.

Mixing business and personal spending

Using dedicated business accounts makes transactions easier to identify, categorize, and support.

Falling behind on reconciliations

Bank and credit card accounts should be reconciled regularly so missing, duplicated, or incorrect transactions can be identified promptly.

Treating the bank balance as the whole financial picture

Cash in the bank is important, but it does not tell you everything about profitability, outstanding obligations, or money owed to the business.

Assuming bank feeds do the bookkeeping for you

Bank feeds can save time, but downloaded transactions still need to be reviewed and categorized correctly.

Ignoring unpaid invoices and bills

Regularly reviewing accounts receivable and accounts payable helps you understand what money is expected in and what obligations are coming due.

Waiting until tax time to clean everything up

Keeping the books current throughout the year makes tax preparation easier and gives you useful financial information when you actually need it.

A good habit:

When something in the books does not make sense, investigate it while the transaction is still recent. Questions rarely become easier to answer six months later.

Year-End Preparation

A smooth year-end starts long before December.

Year-end bookkeeping is much easier when the books have been maintained throughout the year. Before your records are handed off for tax preparation, take time to make sure accounts are reconciled, outstanding items have been reviewed, and important supporting documents are organized.

Before year-end

Make sure bank and credit card accounts are reconciled
Review outstanding customer invoices
Review unpaid vendor bills
Verify loan balances and other liabilities
Review payroll records and payroll tax filings, when applicable
Review sales tax records and filings, when applicable

Prepare for your tax professional

Organize major purchase and equipment records
Gather loan and financing documents
Review owner contributions and distributions
Make sure contractor information is complete for required information returns
Gather relevant tax notices and correspondence
Review the Profit & Loss and Balance Sheet for anything unusual
Make sure supporting documents are accessible if questions arise