If you use a portion of your home exclusively for business, you may be entitled to a significant tax break through depreciation. Unlike standard expenses, depreciation allows you to recover the cost of your home's structure over time. Use our calculator below to estimate your annual deduction.
Understanding Home Office Depreciation
Depreciation is often the most overlooked part of the home office deduction. While many small business owners remember to deduct a portion of their utilities, internet, and insurance, the "Actual Expenses" method allows for the depreciation of the home's structure itself.
The 39-Year Rule
According to IRS Publication 587, for tax purposes, a home office is generally classified as "non-residential real property." This means you must depreciate the business portion of your home over a 39-year period. If you are a renter, you cannot claim depreciation; instead, you simply deduct the business percentage of your monthly rent.
Calculating Your Basis
The most critical step in using the home office depreciation calculator is determining your adjusted basis. You cannot depreciate the land your house sits on—only the structure itself. To find your basis:
- Take the purchase price of the home.
- Subtract the value of the land at the time of purchase.
- Add the cost of any permanent improvements (like a new roof or central AC).
Once you have this number, you multiply it by the percentage of your home used for business (Office Sqft / Total Sqft) to find your business basis.
Simplified vs. Actual Expense Method
The IRS offers two ways to claim the home office deduction:
- Simplified Method: You claim $5 per square foot (up to 300 sq ft). You do not claim depreciation under this method.
- Actual Expense Method: You track all home expenses and calculate depreciation. This often results in a larger deduction, especially for homeowners in high-value areas.
A Word of Caution: Depreciation Recapture
It is important to know that when you sell your home, the IRS may require you to pay "depreciation recapture" taxes. This means the depreciation you claimed (or could have claimed) while living there will be taxed at a rate of up to 25% upon the sale of the home, even if the rest of your home sale gain is excluded from capital gains tax.
Always consult with a qualified tax professional or CPA before making final decisions regarding your tax returns.