FreeCalculators

Home Office Deduction Calculator

Use our calculator to determine your home office deduction using simplified or actual expense methods for tax savings.

Business & Tax · Reviewed by FreeCalculators Editorial · Updated 2026-09-01

How it works

The Home Office Deduction Calculator helps you estimate your potential tax savings by determining your deductible home office expenses. You can choose between the simplified method and the actual expense method. With the simplified method, you can deduct $5 per square foot of your home office space, up to a maximum of 300 square feet. For example, if your home office is 150 square feet, your deduction would be 150 sq ft x $5 = $750. If you opt for the actual expense method, you will need to calculate your total home-related expenses, such as mortgage interest, utilities, and repairs, and then determine the percentage of your home that is used for business. In this case, if your total home size is 2000 sq ft, your office represents 7.5% of your home, allowing you to deduct 7.5% of your mortgage and utilities. This calculator simplifies the process, providing you with a clear estimate of your potential deduction, ensuring you maximize your tax savings.

Tips

  • Keep accurate records of your home office expenses to make tax filing easier.
  • Consider the simplified deduction if your home office is smaller than 300 square feet for straightforward calculations.
  • Review IRS guidelines annually as home office deduction rules may change.
  • Consult with a tax professional to ensure you're maximizing your deductions and complying with tax laws.

Frequently asked questions

What qualifies as a home office?
A home office must be used regularly and exclusively for business purposes.
Can I deduct my entire mortgage payment?
No, you can only deduct the portion of your mortgage interest that corresponds to your home office space.
Is there a limit to the home office deduction?
Yes, under the simplified method, the maximum deduction is $1,500 for a home office of up to 300 square feet.
What expenses can I include in the actual expense method?
You can include mortgage interest, utilities, repairs, and depreciation, proportional to the size of your office.