Top 5 Home Office Deduction Mistakes

If you operate a business out of your home, you may be able to deduct a wide variety of expenses. These may include part of your rent or mortgage costs, insurance, utilities, repairs, maintenance, and cleaning costs related to the space you use.

It is a tricky area of the tax code that's full of pitfalls for the unwary. Here are some of the top mistakes people make:

1. Not taking it. This is probably the biggest mistake those with home offices make. Some believe the deduction is too complicated, while others believe taking a home office deduction increases your chance of being audited. While the rules can be complicated, there are now simple home office deduction methods available to every business.
2. Not exclusive or regular. Your home office must be used exclusively and regularly for your business. Exclusively: If you use a spare bedroom as a business office, it can't double as a guest room, a playroom for the kids, or a place to store your hockey gear. Any kind of non-business use can invalidate your deduction. Regularly: Your office should be the primary place you conduct your regular business activities. That doesn't mean that you have to use it every day nor does it stop you from doing work outside the office, but it should be the primary place for business activities such as record keeping, billing, making appointments, ordering equipment, or storing supplies.
3. Mixing use with other work. If you are an employee for someone else in addition to running your own business, be careful in using your home office to do work for your employer. Generally, IRS rules state you can use a home office deduction as an employee only if your employer doesn't provide you with a local office. Unfortunately, this means if you run a side business out of your home office, you cannot also bring work home from your employer and do it in your home office. That could invalidate your use of the home office deduction.
4. The recapture problem. If you have been using your home office deduction, including depreciating part of your home, you could be in for a future tax surprise. When you later sell your home you will need to account for this depreciation. The depreciation recapture rules create a possible tax liability for many unsuspecting home office users.
5. Not getting help. There are special rules that apply to your use of the home office deduction if:
   • You are an employee of someone else.
   • You are running a daycare or assisted living facility out of your home.
   • You have a business renting out your primary residence or a vacation home.

​The home office deduction can be tricky, so ask for help, especially if you fall under one of these cases.

​Simplified Home Office Deduction

​​There's a simple "safe harbor" home office deduction. You take the square footage of your office, up to 300 square feet, and multiply it by $5. This gives you a potential $1,500 deduction under the simplified option. However, your savings could be much greater than $1,500, so it's often worth getting help to calculate your full deduction using the standard rules.