Bookkeeping Basics for Small Business Owners
A simple system to track income and expenses, categorize them for taxes, and stay organized.
In this article
Why bookkeeping matters from day one
Bookkeeping is simply recording every dollar that comes in and goes out, and keeping proof. Do it well and you always know whether you're profitable, you can see problems early, you'll claim every deduction you're owed, and tax season takes an afternoon. Skip it and you'll be reconstructing a year of bank statements in April.
A simple bookkeeping system that works
1. Separate business and personal money
Open a business checking account and, ideally, a business credit card. Pay every business expense from them and deposit every payment into them. This one habit eliminates most bookkeeping pain.
2. Record every transaction
For each sale or expense, record the date, amount, category, and who it was with. Do it weekly, not yearly. Our free income and expense tracker is enough for many new businesses; as you grow, accounting software that connects to your bank saves time.
3. Use categories that match your tax return
If you're a sole proprietor or single-member LLC, your expenses end up on Schedule C. Using the same categories from the start makes filing simple:
| Category | Examples |
|---|---|
| Advertising | Online ads, flyers, sponsorships |
| Contract labor | Freelancers and contractors you pay |
| Insurance | General liability, professional liability |
| Office expense | Supplies, postage, small equipment |
| Rent or lease | Office, coworking, equipment rental |
| Supplies | Materials used in your work |
| Taxes and licenses | Business licenses, state fees |
| Travel and meals | Business trips; business meals are generally only 50% deductible |
| Utilities | Phone, internet (business share) |
| Other expenses | Software subscriptions, bank fees, education |
4. Keep your receipts
Snap a photo of every receipt and save it in a folder by month, or attach it in your software. Keep records that support your tax return for at least three years after you file; the IRS can require longer in some situations, and records for assets should be kept until you've sold them and the return for that year is closed.
5. Reconcile every month
Once a month, compare your records to your bank and card statements so every transaction matches. This catches missing entries, duplicate charges and fraud while they're easy to fix.
6. Review your numbers
Each month, look at income, expenses and profit. Which costs are growing? Which clients or products earn the most? Our profit margin calculator helps you check that your prices leave enough room.
Start logging income and expenses now. It's free, private and exports to CSV for your accountant.
Open the expense trackerCash vs accrual accounting
Cash basis records income when you receive the money and expenses when you pay them. It's simple and most small businesses use it. Accrual basis records income when you earn it (when you send the invoice) and expenses when you incur them, which gives a truer picture of profit for businesses with lots of invoices or inventory. Pick one and stay consistent; ask an accountant if you carry inventory or expect to grow quickly.
Set money aside for taxes
When you're self-employed, nobody withholds tax from your income. A common rule of thumb is to move 25 to 30% of every payment into a separate savings account for taxes, then pay quarterly estimated taxes from it. Your actual rate depends on your income, state and deductions. See the 1099 vs W-2 guide for how self-employment tax works.
When to get help
Consider a bookkeeper or accountant when you spend more than a few hours a month on your books, when you hire employees, when you need to collect sales tax in several states, or when you're thinking about an S corp election. A good accountant usually pays for themselves in saved time and tax.
Frequently asked questions
What's the difference between bookkeeping and accounting?
Bookkeeping is recording and organizing transactions. Accounting uses those records to prepare financial statements, file taxes and give advice. Most small business owners can do their own bookkeeping and hire an accountant for taxes.
Can I do my own bookkeeping?
Yes, especially when you're starting out. A separate bank account, a weekly habit of recording transactions, and a monthly reconciliation are enough for many small businesses.
How long should I keep business records?
Generally at least three years from the date you file the related tax return. Keep employment tax records at least four years, and keep records about property and equipment until the period for the year you dispose of it has closed.
Can I use a spreadsheet for bookkeeping?
Yes. Many new businesses start with a spreadsheet or a simple tracker like ours and export it to CSV. Move to accounting software once you have many transactions, employees or inventory.
This article is general information for US readers, not legal, tax or financial advice. Rules, prices and platform policies change, so confirm details with official sources or a qualified professional.