Bookkeeping Basics for Your First Year in Business
Updated 2026-10-27
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This article is general information, not legal or tax advice. Talk to a licensed professional about your situation.
Bookkeeping is how you learn whether your business is working, and it's what you lean on at tax time. The IRS says good records help you track progress, prepare financial statements, track deductions and support your return. Here's a simple year-one setup.
1. Separate business and personal money
IRS Publication 583 says one of the first things to do is open a business checking account and keep it separate from your personal account. The SBA recommends the same as soon as you start taking in or spending money as a business.
- Deposit all business income into the business account.
- Pay business expenses from the business account.
- When you pay yourself, record it as a transfer or owner's draw, not an expense.
2. Choose an accounting method
The IRS describes two basic methods, and you pick one when you file your first return.
| Method | When you record income | When you record expenses |
|---|---|---|
| Cash | When you receive payment | When you pay |
| Accrual | When you earn it, even if paid later | When you incur it, even if paid later |
The IRS says you must use the same method for your books and your tax return, and you generally need IRS approval to change methods later. If you hold inventory, the rules can differ. Ask a tax professional before you file your first return.
3. Pick a bookkeeping system
The IRS doesn't require a specific system, as long as it clearly shows your income and expenses. Your main options:
- Spreadsheet (single-entry): Publication 583 calls single-entry the simplest system and a practical one for a new small business. You log each sale and expense in a running list.
- Bookkeeping software (usually double-entry): Double-entry has built-in checks because every transaction hits two accounts, and debits must equal credits. Most bookkeeping software does this for you behind the scenes and can import bank transactions.
- A bookkeeper: some owners hand off the monthly work.
If you use software, the IRS expects you to be able to produce legible records that tie back to your source documents.
4. Set up simple categories
Use categories that line up with your tax return, so year-end is easier. A starter list:
- Sales or service income
- Cost of goods sold (if you sell products)
- Advertising and marketing
- Software and subscriptions
- Office supplies
- Professional fees (legal, accounting)
- Insurance
- Rent or home office
- Vehicle expenses
- Bank and payment processing fees
- Owner's draws (not an expense)
- Sales tax collected (not income)
That last one matters. In Florida, sales tax you collect belongs to the state, so track it separately from your revenue.
5. Keep your supporting documents
The IRS says purchases, sales, payroll and other transactions create the documents that back up your books. Keep them organized by year and type. Examples from Publication 583:
- Income: bank deposit slips, invoices, receipt books, card charge slips, and any Forms 1099 you receive
- Expenses: canceled checks or account statements, invoices, card slips, and petty cash slips
- Assets: when and how you bought each item, what you paid, improvements, and depreciation taken
A bank or card statement shows you paid something, but the IRS notes it doesn't prove by itself that the cost was deductible. Keep the receipt or invoice too. Scanning is fine; the same IRS requirements apply to electronic records.
6. Know how long to keep records
The IRS ties record retention to the "period of limitations" for each return:
| Situation | Keep records at least |
|---|---|
| Most income tax returns | 3 years |
| Claiming a credit or refund after filing | 3 years from filing or 2 years from paying the tax, whichever is later |
| Unreported income over 25% of gross income shown | 6 years |
| Loss from worthless securities or bad debt | 7 years |
| Employment tax records | 4 years after the tax is due or paid, whichever is later |
| No return filed, or a fraudulent return | Indefinitely |
Keep property records until the limitations period ends for the year you sell or dispose of the property. Your bank, insurer or lender may want records kept longer.
7. Build a monthly routine
Publication 583 suggests recording transactions daily if you can and reconciling your bank account every month. A simple monthly checklist:
- [ ] Record or import every transaction
- [ ] Attach a receipt or invoice to each expense
- [ ] Reconcile each bank and card account to its statement
- [ ] Follow up on unpaid invoices
- [ ] Review a profit and loss report
- [ ] Set aside money for taxes
8. Put tax dates on the calendar
- Estimated taxes: the IRS says sole proprietors, partners and S corporation shareholders generally must make estimated payments if they expect to owe $1,000 or more. Self-employment tax is 15.3% on net earnings, so plan for it.
- Florida sales tax (if registered): returns are due on the 1st and late after the 20th of the month after each reporting period. File every period, even when no tax is due. Florida's late penalty can be 10% of the tax owed, with a $50 minimum even when no tax is due.
- Forms 1099: if you pay contractors, check the IRS's current filing thresholds and deadlines in the General Instructions for Certain Information Returns.
FAQ
Do I need bookkeeping software in my first year? Not necessarily. The IRS accepts any system that clearly shows income and expenses, and a single-entry spreadsheet can work at first. Software can save time as transactions pile up and makes reconciling easier.
Can I just use my bank statements as my records? Statements help, but they aren't enough on their own. The IRS says proof of payment doesn't by itself show you're entitled to a deduction, so keep receipts and invoices too.
How often should I update my books? The IRS suggests recording transactions daily and reconciling monthly. If daily isn't realistic, try weekly.
Sources
- IRS: Recordkeeping
- IRS: How long should I keep records?
- IRS: Publication 583, Starting a Business and Keeping Records
- IRS: Self-employment tax
- Florida Department of Revenue: Sales and Use Tax
- SBA: Open a business bank account
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