The setup wizard makes it look easy. Answer a few questions, connect your bank, and you’re done. In reality, the defaults QuickBooks picks are generic and the decisions you make in the first week follow you for years. It’s worth getting this right.

Start by picking the right version. QuickBooks Online works for most small businesses and lets you access your books from anywhere. QuickBooks Desktop still exists and some industries prefer it, but it’s being phased out. If you’re starting fresh, Online is usually the better choice. Simple Start handles basic businesses. Essentials adds bill pay and multiple users. Plus adds inventory and project tracking. Don’t pay for features you won’t use, but don’t cheap out if you need them.

The chart of accounts is where most DIY setups go wrong. QuickBooks gives you a default list based on your industry. It’s a starting point, not a solution. A contractor needs different expense categories than a restaurant. A retail shop needs inventory accounts a consultant doesn’t. Build a chart of accounts that tracks what matters for your business. Too few categories and your reports are useless. Too many and you’ll never categorize things consistently.

Connect your bank accounts and credit cards properly. QuickBooks can pull transactions automatically, which saves time but creates problems if you’re not careful. Each account needs to connect to the right place in your chart of accounts. If you have multiple accounts, make sure deposits and transfers don’t get double-counted. The bank feed is a tool, not a bookkeeper. Someone still needs to review and categorize what comes in.

Set up rules for recurring transactions. Your rent payment is the same every month. So is your phone bill, your software subscriptions, your loan payments. Create rules that automatically categorize these when they come through. It saves time and keeps categorization consistent. But review the rules regularly because QuickBooks sometimes applies them to transactions they shouldn’t.

Get your opening balances right. If you’re moving from another system or starting mid-year, you need accurate opening balances for every account. Your bank account balance on day one. Outstanding invoices. Bills you owe. Loan balances. Get this wrong and your balance sheet will never reconcile properly. This is one of the most common mistakes in DIY setups.

Set your fiscal year and closing dates. Most small businesses use a calendar year. Set a closing date after you’ve filed taxes so nobody accidentally changes last year’s numbers. QuickBooks lets you password-protect closed periods. Use that feature.

The settings buried in the menus matter more than they seem. Sales tax settings if you collect it. Invoice templates and payment terms. Default accounts for common transactions. Payroll settings if you’re using QuickBooks for that. Spend an hour going through settings before you start entering real data.

If this sounds like a lot, it is. Professional QuickBooks setup costs a few hundred dollars and saves you from discovering a year later that your books have been wrong since day one. The people who set it up themselves and do it right usually have accounting backgrounds. Everyone else ends up paying for cleanup work that costs more than proper setup would have.