A Startup's Guide to Setting Up a Chart of Accounts

A chart of accounts for a small business is the master list of every account your business uses to record money moving in and out — think of it as the table of contents for your entire set of books. Every transaction you record gets filed under one of these accounts, which is what makes your financial statements possible in the first place.

This guide is for founders setting up their books for the first time, right after opening a business bank account or registering their entity. We'll cover what a chart of accounts actually is, show you a real example, walk through building your own step by step, and flag the mistakes that cause the most cleanup work later. If you'd rather have a professional set this up correctly the first time, our accounting services team at Unity Business Advisors builds and maintains charts of accounts for small businesses every day.

What Is a Chart of Accounts, and Why Does Your Startup Need One?

A chart of accounts is a numbered list of every account your business uses to categorize its financial transactions, organized by type — assets, liabilities, equity, revenue, and expenses. It's the structure your accounting software uses behind the scenes every time you record a sale, pay a bill, or log an expense.

You need one from day one because it's what makes your books usable. Without a clean chart of accounts, your profit-and-loss statement is just a pile of uncategorized transactions, which means you can't tell a lender, an investor, or your own future self what's actually happening in the business. Set it up right the first time, and every report you pull for the life of the business draws on the same clean foundation.

The 5 Core Categories in Every Chart of Accounts

Every chart of accounts is built from five core categories, and understanding them is the fastest way to answer "what's the list of accounts in accounting" for your own business:

Assets — what your business owns: cash, equipment, accounts receivable.

Liabilities — what your business owes: credit card balances, loans, unpaid bills.

Equity — the owner's stake in the business after liabilities are subtracted from assets.

Revenue — every dollar the business earns from sales or services.

Expenses — every dollar spent to run the business, from rent to software subscriptions.

Every account you'll ever add to your chart of accounts falls into one of these five categories. If you're not sure where a new account belongs, ask which of the five questions it answers: what you own, what you owe, what's left over, what you earned, or what you spent.

A Simple Chart of Accounts Example for a New Business

Here's what a startup's chart of accounts typically looks like in practice — a real chart of accounts example scaled for a small service-based business:

Notice the account numbers aren't sequential by row — they're grouped by category with room between them. That spacing is intentional, and it's the key to a chart of accounts that still works two years from now.

How to Create a Chart of Accounts for Your Business

Building a chart of accounts takes five steps, and none of them require accounting software beyond what you already have.

Start from your accounting software's default template. Xero ships with an industry-general starting chart of accounts — use that as your foundation instead of building from a blank page. If you're on a different platform, the same principle applies: start from its default template, not a blank page.

Assign number ranges by category. Give each of the five core categories its own numbering band, so every account's type is obvious from its number alone (see the framework below).

Add only the accounts your business actually uses. Resist the urge to pre-build accounts for revenue streams or expense types you don't have yet — you can add them when they exist.

Leave numbering gaps between accounts. Space account numbers out (1000, 1010, 1020, rather than 1000, 1001, 1002) so you can insert new accounts later without renumbering anything.

Review and adjust after your first full month of transactions. You'll usually spot one or two missing or unnecessary accounts once you've actually used the chart for a real month of bookkeeping.

That's the entire process. The software handles the mechanics; your job is the structure.

Using a Chart of Accounts Template the Right Way

A chart of accounts template is a starting point, not a finished product — it still needs to match your specific business. A generic template from the internet will have accounts you'll never use and will be missing accounts specific to your industry, so treat it as a rough draft, not a final answer.

That's where numbering structure matters more than the account names themselves. We use what we call the Unity Scalable COA Framework with new clients: assign Assets to the 1000–1999 range, Liabilities to 2000–2999, Equity to 3000–3999, Revenue to 4000–4999, and Expenses to 5000–5999, then leave at least a 10-number gap between each account within a band. That structure means you can add a new bank account, a new revenue stream, or a new expense category at any point without ever renumbering an account you're already using — which is the single most common reason businesses end up paying for a bookkeeping cleanup in year two.

If you download a template, apply this banding to it before you start using it, not after your books are already six months deep.

Common Chart of Accounts Mistakes to Avoid

The most common mistake is over-building the chart with too many accounts before the business has a reason for them — a startup with three revenue streams doesn't need fifteen revenue accounts on day one. A few other mistakes show up just as often:

Skipping the numbering system entirely and just naming accounts alphabetically, which makes reports harder to read as the list grows.

Mixing personal and business transactions into the same accounts, which creates cleanup work that's more expensive to fix later than it would have cost to keep separate from day one.

Renaming or deleting accounts mid-year instead of marking them inactive, which breaks the historical comparability of your financial statements.

Never revisiting the chart after setup, so it stops reflecting how the business actually operates within a year or two.

These are the same patterns we see most often when hiring a professional bookkeeper becomes the right move — a chart of accounts that's drifted out of sync with the business is usually the first thing that needs fixing.

Frequently Asked Questions

What's the difference between a chart of accounts and a general ledger?

The chart of accounts is the list of account categories your business uses; the general ledger is where every individual transaction actually gets recorded under those accounts. Think of the chart of accounts as the filing system and the general ledger as the filed documents.

How many accounts should a small business chart of accounts have?

Most early-stage small businesses need somewhere between 20 and 40 accounts total across all five categories. If you're well beyond that in your first year, you're likely over-building — start smaller and add accounts as the business actually needs them.

Can I change my chart of accounts after I've started using it?

Yes, and most businesses adjust theirs at least once in the first year. The safer approach is to mark unused accounts inactive rather than deleting them, which preserves your historical reporting.

Do I need a different chart of accounts for each business I own?

Yes. Each legal entity needs its own separate chart of accounts and its own set of books, even if the businesses are related or owned by the same person.

Does the IRS require a specific chart of accounts format?

No. The IRS doesn't mandate a specific format — it requires a recordkeeping system that clearly shows your income and expenses, which a well-structured chart of accounts naturally provides.

Key Takeaways

A chart of accounts is built from five core categories: Assets, Liabilities, Equity, Revenue, and Expenses.

The IRS doesn't require a specific chart of accounts format — it only requires a recordkeeping system that clearly shows income and expenses (IRS Publication 583).

The Unity Scalable COA Framework bands account numbers by category (1000s Assets, 2000s Liabilities, and so on) with gaps between accounts so you never have to renumber as you grow.

The most common chart of accounts mistake is over-building it with accounts the business doesn't need yet.

Accounting firms commonly recommend keeping a business's chart of accounts permanently, alongside financial statements and tax returns.

Want a second set of eyes on your setup before you're a year in? Schedule a Consultation with our team, and we'll review or build your chart of accounts together. Prefer to talk it through? Call (206) 527-2689.

The Bottom Line

Your chart of accounts is the foundation every financial report you'll ever pull is built on, so it's worth getting the structure right before you record your first transaction. Start from a template, apply a numbering framework with room to grow, and add accounts only when the business actually needs them.