Your chart of accounts is the backbone of every financial report your business will ever produce. Get it right early, and your P&L and balance sheet stay readable for years. Get it wrong, and every report inherits the mess — usually as dozens of oddly specific categories that made sense once and mean nothing six months later.
Start with the five core categories
Every chart of accounts is built from the same five buckets: assets, liabilities, equity, revenue, and expenses. Everything else is a subcategory underneath one of these five. If you're not sure where an account belongs, it belongs under one of these — there's no sixth option hiding somewhere.
Keep expense categories broad, not exhaustive
It's tempting to create a new category for every type of purchase. Resist it. "Office Supplies," "Software & Subscriptions," and "Marketing" will tell you more, faster, than fifteen narrow categories that fragment the same spending across your reports. You can always get more specific later if a category genuinely needs it — it's much harder to consolidate after the fact.
Number your accounts by type
A common and genuinely useful convention: 1000s for assets, 2000s for liabilities, 3000s for equity, 4000s for revenue, 5000s and up for expenses. It keeps related accounts grouped together and sorted sensibly without you having to think about it.
Match it to how you actually think about the business
If you mentally track the business by service line, your revenue accounts should reflect that. If you think about it by department, structure expenses that way instead. The chart of accounts should mirror the questions you actually want your reports to answer — not a generic template that happens to exist.
Revisit it once a year, not once a week
A chart of accounts that changes constantly makes year-over-year comparisons meaningless. Set it up thoughtfully, live with it for a full year, and only make structural changes at a natural breakpoint — the start of a new fiscal year is the cleanest time to do it.