• clearly and easily show your business finances separate from your personal finances
• analyse your cash flow
• monitor your business income and expenses
• extract information needed to meet your tax and reporting obligations
• easily get detailed records of your business transactions, particularly if you put those transactions through a limited number of accounts.

If you have a business credit card attached to your business bank account, and do most of your transactions through your credit card, your bank statements will, in effect, be a checklist of your expenses.