How to Set Up Business Accounting

Step 1: Open a Dedicated Business Bank Account

Before recording a single transaction, open a bank account used only for the business, separate from personal finances. This isn't just a bookkeeping convenience: for an LLC or corporation, commingling personal and business funds is one of the practical factors a court weighs when deciding whether to disregard the entity's liability protection. You'll typically need your EIN and formation documents to open this account.

Step 2: Choose Cash or Accrual Accounting

Cash-basis accounting records income when you actually receive payment and expenses when you actually pay them, which is simpler and common for a small, straightforward business. Accrual-basis accounting records income when it's earned, such as when you send an invoice, and expenses when they're incurred, regardless of when cash actually moves, which gives a more accurate picture of profitability for a business with significant unpaid invoices or inventory. Most new, small businesses start with cash-basis accounting for its simplicity, then revisit the choice with a tax professional as the business grows.

Step 3: Set Up Categories That Match Your Tax Filings

Organize income and expenses into categories you'll actually use at tax time, such as supplies, rent, payroll, and professional services. The IRS states that "the business you are in affects the type of records you need to keep for federal tax purposes," so a retail business and a service business won't necessarily use identical categories.

Step 4: Decide Between a Spreadsheet and Software

A simple spreadsheet is enough for a very small, low-transaction business to start with. Accounting software becomes more useful once transaction volume grows, since it can automatically pull in bank transactions, generate reports, and reduce manual entry errors. Either approach satisfies the IRS's recordkeeping standard as long as it clearly shows your income and expenses.

Step 5: Keep Every Supporting Document, Not Just a Summary

Beyond a running ledger of totals, keep the underlying documents, receipts, invoices, bank statements, and payroll records, that support each entry. The IRS lists these as supporting documents containing the information you need to record in your books, and they're what you'd need if a filing were ever questioned.

Step 6: Reconcile Your Books Against Your Bank Statement Regularly

Compare your recorded transactions against your actual bank statement on a regular schedule, monthly at minimum, to catch errors, missed entries, or unauthorized charges early. Letting months of transactions pile up unreconciled makes errors much harder to track down later.

Step 7: Know How Long to Keep Records

The IRS requires employment tax records to be kept for at least four years. For other records, the IRS's standard is to keep them "as long as needed to prove the income or deductions on a tax return," which depends on the specific document and the tax position it supports. When in doubt, keep a record longer rather than shorter.

Step 8: Decide Whether to Hire Help

A bookkeeper can handle day-to-day data entry and reconciliation, while an accountant or tax professional handles tax filings and bigger-picture decisions like entity classification. Many new businesses start by doing their own bookkeeping and bring in outside help once transaction volume or tax complexity grows beyond what they can manage alongside running the business.

Set Up Accounting Before Your First Sale, Not After

A business that waits until tax season to organize its first year of transactions usually spends far more time reconstructing records than it would have spent keeping them current from the start. Set up your system before you need it.

Payroll Accounting Has Its Own Requirements

If you have employees, payroll accounting involves its own set of records, withholding calculations, and deadlines, separate from general bookkeeping. See a payroll-specific resource or a payroll provider once you're ready to hire, rather than trying to fold payroll into a general bookkeeping system built for a business with no employees.

Software Choice Matters Less Than Consistency

No accounting software catches every error if transactions aren't entered consistently and regularly. Pick a system you'll actually maintain over one with every possible feature that you'll use inconsistently.

Your Structure Affects What You Track

A sole proprietorship reports business income on the owner's personal return, while an LLC taxed as a partnership or a corporation has its own tax filing separate from the owners. Confirm with a tax professional how your specific structure affects which accounts and categories you need to track.

This Is Not Tax or Legal Advice

Recordkeeping requirements and best practices depend on your business's structure, industry, and specific tax situation. Talk to a tax professional or bookkeeper to confirm your setup matches what your filings will require.