Paying yourself

The home office deduction is not the trap people think

You work from home and somebody warned you that claiming the office invites an audit. That advice is decades out of date. The test that does still bite is the one nobody mentions.

I hear this every year. An owner working from a spare bedroom, running a real business from it, choosing not to claim anything because a friend or a previous preparer told them it was a red flag.

That reputation comes from a time when working from home was unusual enough to stand out on a return. It is not unusual now. Enormous numbers of businesses are run from houses, and the deduction is ordinary.

The misconception

The belief is that the home office is an audit magnet, so the safe play is to leave it alone. Declining a deduction you are entitled to is not a safety measure. It is a payment.

The real risk was never the claim itself. It was claims made on space that did not meet the test, which is a different thing and is still true today.

What is actually happening

The core requirement is exclusive and regular use. The space has to be used for business, regularly, and for nothing else. Not mostly business. Not business during the day. Exclusively.

If it qualifies, there are generally two ways to calculate the deduction. A simplified method based on square footage at a set rate, which is quick and capped. Or an actual expense method, where you take the business percentage of your home costs, including a share of mortgage interest or rent, insurance, utilities, repairs and depreciation where applicable.

The audit-magnet reputation is decades out of date. The exclusive use test is not.

There is also a knock-on effect people forget. A qualifying home office can change how mileage is treated, because it can make the home the principal place of business and turn what were commuting miles into business miles.

The number

The range depends on the size of the space relative to the home, the cost of running the home, and which method you use. The simplified method is capped by design, so it produces a modest, predictable figure. The actual expense method often produces more, sometimes considerably more, and it costs you record keeping to get there.

Method choice matters more than most people expect, and the better method is not the same every year or for every home. It also interacts with depreciation and with what happens when you eventually sell the house, which is a conversation worth having before you pick, not after.

What it actually requires

Modest, but real:

• A space used only for the business, with nothing personal happening in it
• Measurements of that space and of the home, written down
• Records of home costs if you use the actual expense method
• Photographs are cheap and settle arguments years later
• Consistent treatment year to year, with a reason on file when it changes

Who this is not for

If the room doubles as anything else, it does not qualify. The guest bed that comes out twice a year disqualifies it. The corner of the family room where the television also lives disqualifies it. The children's homework table disqualifies it. Exclusive means exclusive, and this is where nearly every failed claim comes apart.

It is also not worth chasing if the space is small and your home costs are low. The deduction will be minor, and the record keeping under the actual expense method will cost you more attention than the result is worth. The simplified method exists partly for this situation.

And it is not for someone whose business genuinely operates elsewhere. If you have an office you go to every day and you occasionally answer email at home, the regular use side is weak even when the exclusivity is fine.

The timing

Measure and document during the year. In spring your preparer can only ask what the square footage was, and an estimate given from memory is exactly as defensible as it sounds. A photograph, a measurement and a note take fifteen minutes once.

This is a planning question

Whether you claim it is a preparation matter. Whether you set the space up so it qualifies, pick the right method for your home, and understand what that choice means when you sell, is planning. Those decisions happen while the year is still in front of you.

This is general information, not advice on your own situation. Whether any of it applies to you depends on facts this article does not know.