You can reap major tax savings with the heavy vehicle and home-office combo. The heavy vehicle produces quick deductions. The home office that qualifies as a principal office eliminates commuting miles, and such an elimination can dramatically increase your business-use percentage of vehicles.

For example, say you bought a $50,000 vehicle that you use 60 percent for business. Your depreciation and expensing elections apply to $30,000. But if you can increase your business percentage to 90 percent with a tax code–defined principal office in your home, your base for tax deductions increases to $45,000—that’s a $15,000 increase, and you did not spend a penny or drive a mile farther to capture it.