Contractors, Bookkeepers and Tax Accountants are trying to keep everything all in one place. That is great. A single bank account on the surface is the answer in simplicity.

Sharie’s Cash Management 101 Training I Teach Contractors Please Do Not Do This!

Why – when putting everything in one bank account; it could be a FINANCIAL DISASTER.  
Go to Home Depot, Lowes or any other larger store.  
Use your debit card; Drop or lose your debit card,
Someone finds it and buy stuff until he or she have spent all your money!
(may be a little harder with the chip but how many places can you run your debit card as a credit card?)