Open a dedicated business bank account if you haven’t already. This is the foundation. All business income goes in and all business expenses come out. Personal money and business money never touch in the same account. If you’re operating from one account that handles both personal and business transactions, separating them in your books becomes tedious and error-prone.

In your accounting software, track owner activity through equity accounts. When you put personal money into the business, that’s an owner contribution. When you take money out for personal use, that’s an owner draw. Both should post to equity accounts, not expense or income accounts. This keeps your profit and loss statement clean and accurately reflects what the business actually earned versus what the owner put in or took out.

Pay yourself through documented transfers only. When you need money from the business, transfer a specific amount from the business account to your personal account and record it as an owner draw. Don’t use the business debit card for groceries or pay personal bills from the business checking account. Every personal transaction in a business account muddies your books and creates extra work during reconciliation.

If you pay for something business-related with personal funds, record it as a business expense with the other side posting to owner contribution or a due-to-owner account. This documents that you personally covered a business cost. You can reimburse yourself later or leave it as additional capital you’ve put into the company. A bookkeeping service can help you set up these accounts correctly from the start.

For S-corps, the separation is more formal. You’re required to pay yourself a reasonable salary through payroll before taking additional profits as distributions. The salary gets taxed differently than distributions, and the IRS scrutinizes S-corp owners who try to avoid payroll taxes by taking everything as distributions. Your accountant should help you determine what reasonable compensation looks like for your role.

The discipline of keeping funds separate pays off in multiple ways. Your financial statements become accurate and useful for decision-making. Tax preparation goes faster because your accountant isn’t sorting through mixed transactions. If you ever need financing or want to sell the business, clean books with clear separation between owner and operating activity make due diligence straightforward.

Monthly bookkeeping helps maintain this separation consistently. When someone reviews your transactions each month, they catch instances where personal and business got mixed before it becomes a pattern. They also make sure owner draws and contributions are recorded correctly so your equity accounts stay accurate.

If you’ve been mixing funds and need to untangle things, start fresh with a new dedicated business account and clean up the historical records as a separate project. Going forward, the habit is simple: business money stays in business accounts, personal money stays in personal accounts, and transfers between them are documented and intentional.