Bookkeeping Basics for a Garage Business: A Simple System That Works
Bookkeeping isn’t why anyone starts a garage business, but a simple system will save you hours at tax time and help you see whether you’re actually making money. You don’t need fancy software on day one. You need a habit.
This is general information. For your specific situation, talk with a tax professional.
Step 1: Separate the money
Open a bank account used only for the business, and run all business income and expenses through it. The SBA notes you’ll need a business bank account no matter how you take payments. The IRS says that for most small businesses, the business checking account is the main source of entries for your books, so keeping it clean makes everything else easier.
Step 2: Pick a simple system
The IRS says you can use any recordkeeping system that suits your business, as long as it clearly shows your income and expenses. That could be a spreadsheet, accounting software or a bookkeeping app. Electronic records follow the same rules as paper ones.
Most small home businesses use the cash method, recording income when it comes in and expenses when they’re paid. The SBA describes it as easier to understand, while the accrual method is more complex.
Step 3: Keep the paperwork
Your books need supporting documents. The IRS groups them like this:
- Income: deposit records, invoices, receipt books, sales platform reports and 1099 forms
- Purchases for resale and materials: invoices, receipts and card statements
- Expenses: receipts and statements showing who you paid, how much, the date and the business purpose
- Equipment: purchase date and price, improvements, depreciation and when you sold or disposed of it
Snap a photo of each receipt as soon as you get it and file it in a folder by month.
Step 4: Set a weekly routine
- Record or import the week’s transactions.
- Match them to receipts and platform reports.
- Categorize each expense (materials, shipping, fees, tools, advertising).
- Set aside money for taxes in a separate savings account.
Fifteen minutes a week beats a shoebox in April.
How long to keep records
The IRS generally says to keep records for three years from when you file, but longer in some cases: six years if you underreported income by more than 25%, seven years for bad-debt or worthless-securities deductions, and at least four years for employment tax records. Keep equipment records until the limitation period ends for the year you sell or dispose of it.
If the books start to feel overwhelming, the SBA suggests a bookkeeper for day-to-day work or a CPA for more tailored advice.
More on Garage Business Blueprint
- Taxes for a Garage Business: Self-Employment Tax, Quarterly Payments and the Home Office Deduction
- Home Business Insurance: What Your Homeowner’s Policy Won’t Cover and What to Buy Instead
