Most things like wage and hour claims, payroll tax violations, back taxes, etc. pierce the entity anyway.All that said, I use LLC's (and Corps) are good for protecting limited partners, outlining business structures, providing a little extra layer of privacy, etc.

@Michael Plaks, Agree that using a business account for personal use does not make it deductible (additionally could potentially pierce the corporate barrier). 

Similarly, there are too many ways for a good lawyer to "pierce the corporate veil". 

If you want liability protection, depositing the money in your personal account will make it very easy for an attorney to pierce the corporate veil.I have an operational LLC (it doesn't hold any properties). 

That's just one of the ways an adversary can "pierce the corporate veil". 

@David Pierce you are correct.

You can google "piercing the corporate veil" for more info if you want. 

@Greg MillerHave you discussed with your attorney about whether or not the mortgage being from you individually makes you more vulnerable to the LLC veil being pierced?

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If you ever get sued and the lawyers try to come after you they will try to do what they call piercing the corporate veil.