qbteachment - Thanks for sharing as I am sure this will benefit many here but is N/A for me and all of my clients since I am an S Corp and all of my clients file taxes as an S Corp or C Corp, where the number one rule is NOT to mix business and personal expenses, so that is exact opposite. 

Personally, I cannot see any scenario where I would recommend this to any business owner since then you have zero protection from personal liability from any debt or issues with your business. Meaning if you are sued for anything, they can take your business assets and personal assets too. God forbid if that ever happens, but at least then they can't take your house and your 401k too.

Even more importantly to me, is how do you know how your business is doing if you cannot see how much profit you are making from one month to the next? Much easier to keep it separated. Not to mention if you ever get divorced then you have even more to get sorted out. Of course, we all hope bad things never happen, but I say always plan for the worst and hope for the best.