The home-office deduction for multiple businesses can produce substantial tax savings, especially when it converts what would otherwise be commuting miles into deductible business mileage. But many business owners accidentally put this valuable deduction at risk.
If you use your home office for multiple businesses or more than one purpose, each use must qualify under the tax rules. A single non-qualifying use can jeopardize the deduction.
Home Office Deduction Multiple Businesses: When Use Can Put Your Deduction at Risk
One of the biggest traps involves W-2 employment. Federal law now permanently denies employees a home-office deduction on their personal tax returns. That means if you use the same office for both your self-employed business and your W-2 job, your employee use can threaten the deduction for your business.
The same caution applies if you operate multiple businesses from the same office. Each business must independently qualify for the home-office deduction. Likewise, if you share the office with your spouse, your spouse’s use must also qualify—unless you split the room so each spouse uses a separate portion exclusively.
Other Home Office Deduction Considerations
If your business operates as either an S or a C corporation, there is still a way to benefit from a home office. Rather than claiming the deduction personally, the corporation can reimburse your home-office expenses through an accountable plan.
The consequences of losing the home-office deduction can extend beyond the office itself. You may also lose valuable business mileage deductions if the IRS reclassifies your trips as non-deductible commuting.
How We Can Help
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