Home office expenses are costs incurred while working from home that qualify for tax deductions under IRS rules. To calculate them, use either the simplified method (deduct $5 per square foot, up to 300 square feet) or the traditional method (allocate actual expenses based on workspace size).
The IRS allows deductions for home office expenses if the space is used regularly and exclusively for business. You can deduct direct expenses (like repairs or renovations) and indirect expenses (like mortgage interest, rent, utilities, and insurance) based on the percentage of your home used for business.
Home office expenses fall into two categories: direct and indirect.
| Direct Expenses | Indirect Expenses |
|---|---|
| Repairs, renovations, and maintenance specific to the home office | Mortgage interest, rent, utilities, and insurance |
| Furniture and equipment purchased for the home office | Property taxes and homeowners association fees |
For example, if your home office is 150 square feet and your home is 1,500 square feet, you can deduct 10% of your indirect expenses.
Many taxpayers mistakenly believe they can deduct all home expenses, but only those directly related to the home office qualify., the home office must be used exclusively for business purposes. Personal use disqualifies the space for deductions.
To calculate home office expenses using the traditional method:
For example, if your home office is 200 square feet and your home is 2,000 square feet, you use 10% of your home for business. If your annual indirect expenses total $12,000, you can deduct $1,200. Add any direct expenses, such as $500 for new office furniture, for a total deduction of $1,700.
Alternatively, the simplified method allows you to deduct $5 per square foot, up to 300 square feet. For a 200-square-foot home office, this would be a $1,000 deduction.
When I first calculated my home office expenses, I was surprised by how much I could deduct. By keeping detailed records of all my expenses and using the traditional method, I maximized my deduction and reduced my taxable income.