Bookkeeping Basics for the First Year

Bookkeeping is the day-to-day recording of every dollar that flows in and out of your business. Done well, it takes a few minutes a week and makes taxes, lending, and decision-making easy. Done badly — or skipped entirely — it turns into a multi-thousand-dollar problem at tax time. The good news: a first-year small business doesn't need anything fancy.

This is plain-English starter content. For broader context, see our bookkeeping basics hub, the Learn hub, and business basics.

What "the books" actually are

Your bookkeeping records boil down to four artifacts:

• A chart of accounts — the buckets you sort each transaction into (e.g., "Sales — Services," "Software Subscriptions," "Office Supplies")
• A transaction ledger — every business deposit and expense, dated and categorized
• Financial statements — at minimum a profit and loss (P&L) report and a balance sheet
• Source documents — receipts, invoices, bank statements, contracts

The SBA and IRS both publish small-business accounting basics.

Cash vs. accrual

Two main accounting methods:

• Cash basis. Record income when money lands, expenses when money leaves. Simple, and what most service-based small businesses use.
• Accrual basis. Record income when earned (invoiced), expenses when incurred (received the bill), regardless of cash timing. More accurate for businesses with inventory or long sales cycles. Required by the IRS for some businesses above certain revenue thresholds.

Most first-year solo businesses pick cash basis. You generally must use accrual if you carry inventory or your average gross receipts cross the IRS threshold (the threshold updates yearly — see the IRS).

Step 1: Separate business and personal finances

This is the single most important bookkeeping move. Open a dedicated business checking account and, ideally, a business credit card. Run every business transaction through these accounts. Mixing personal and business money is the #1 cause of messy books, missed deductions, and weakened LLC liability protection (see our LLC vs. sole proprietor guide).

If you accidentally pay a business expense from a personal card, either reimburse yourself promptly through the business account or record it as an "owner contribution" — but don't make a habit of it.

Step 2: Pick your tools

A reasonable first-year stack:

• Bank account + credit card dedicated to the business
• Accounting software — many small businesses pick a cloud product that connects to the bank for automatic transaction import. Spreadsheets work for the first month or two but break down quickly.
• Receipt capture — a phone app or your accounting software's receipt scanner
• Cloud document storage — one folder per year, with subfolders for receipts, invoices, contracts, tax documents

You do not need to hire a bookkeeper in year one for most simple service businesses. Most owners can handle it in 30 to 60 minutes a week with software.

Step 3: Build a chart of accounts

Start small. A typical first-year service business chart of accounts looks something like:

Income

• Sales — Services
• Sales — Products
• Other Income

Cost of Goods Sold (if you sell physical products)

• Materials
• Direct Labor
• Shipping

Operating Expenses

• Advertising and Marketing
• Bank and Payment Processing Fees
• Contractors and Professional Services
• Insurance
• Meals (with care; partial deductibility rules apply)
• Office Supplies
• Rent or Home Office
• Software Subscriptions
• Travel
• Vehicle and Mileage
• Utilities

Equity / Owner

• Owner Contributions
• Owner Draws

You can refine over time, but resist creating dozens of categories. Granularity slows you down and rarely helps decisions.

Step 4: A weekly bookkeeping rhythm

A simple, repeatable cadence:

• Daily (1 minute): photograph every receipt as it happens
• Weekly (15 to 30 minutes): open accounting software, categorize new transactions, match receipts, send unpaid invoices a reminder
• Monthly (30 to 60 minutes): reconcile each bank and credit card account against the statement, run the P&L, transfer the tax savings cut to a separate tax account
• Quarterly: pay estimated taxes, review profit margin, plan the next quarter
• Annually: close the books, hand off to your CPA for tax filing

What records to keep, and for how long

Keep most business records at least three years after filing the related tax return — this is the standard IRS audit window. Some records (employment tax records, asset purchase records, anything related to inventory cost) should be kept longer. The IRS recordkeeping page has the full rules.

Records to keep:

• Bank and credit card statements
• Receipts for deductible expenses (especially meals, travel, vehicle, home office)
• Invoices sent and paid
• Contracts and engagement letters
• 1099s issued and received
• Payroll records (longer retention if you have employees)
• Asset purchase documentation for depreciation
• Annual tax returns and supporting workpapers

Digital photos and PDFs are accepted by the IRS — you do not need to keep paper.

Common bookkeeping mistakes

• Mixing personal and business. As above, this is the biggest one.
• Letting transactions pile up for months. A weekend cleanup of nine months of mixed transactions is brutal. A weekly 20 minutes prevents it.
• Not reconciling. "Reconciling" means making sure your books match the bank statement to the penny each month. Without it, errors compound silently.
• Missing 1099s. If you pay an unincorporated contractor $600 or more in a year, you generally must issue them a Form 1099-NEC. Collect a Form W-9 before paying any new contractor.
• No backup. Cloud accounting + cloud document storage solves this; never store the only copy on one laptop.
• Pretending sales tax is yours. See our sales tax guide. Sales tax collected is held money, not income.

When to hire help

Common moments to bring in a bookkeeper or CPA:

• Once revenue passes roughly $100,000 to $200,000 a year and your time is worth more than the bookkeeping
• When you add employees and payroll
• When you elect S-corp taxation
• When you're considering a loan or outside investment

This is general info, not tax advice. For your specific situation, talk to a CPA.

Tax laws and SBA programs change every year — always check the latest at IRS.gov, SBA.gov, and your state's Secretary of State website.