09/08/2026
The office supply run on your personal debit card seems harmless. Forty of those later, it is a bookkeeping problem.
Mixing business and personal money is the single most common thing we clean up for new clients. And it is not a matter of preference. The IRS tells business owners plainly: one of the first things to do when you start a business is open a business checking account and keep it separate from your personal one, because that checkbook is the basic source for your books.
Here is why it matters at tax time. To deduct an expense, it has to be ordinary and necessary for your business, and you have to be able to back it up. If your records are one blended account, proving which charges were business becomes your job, months or years after the fact, often from memory. Deductions get missed. Others get claimed that should not be, which is its own problem.
There is a housekeeping angle too. Keep records generally for 3 years after filing, and employment tax records for at least 4 years. That is much easier when the business has its own account, its own card, and its own paper trail. If you run an LLC or a corporation, commingling can also weaken the liability separation you set the entity up for in the first place. That one is worth a conversation with your attorney.
The fix is not complicated: a dedicated business checking account, a dedicated card, a set owner draw or paycheck instead of dipping in as needed, and a bookkeeping system that reconciles monthly. If your books are tangled and you would rather not sort it out alone, reach out to Litrivis CPA PLLC. Untangling this is one of our favorite things to fix.