Home Office Deduction Calculator
Calculate your home office deduction using the IRS simplified method: $5 per square foot, up to 300 sq ft (max $1,500). Quick and easy for self-employed individuals.
Home Office Inputs
Deduction Results
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How the Home Office Deduction Works
The home office deduction allows self-employed individuals to deduct expenses related to the business use of their home. The IRS offers two methods: the simplified method and the actual expense method. This calculator uses the simplified method.
Simplified Method
Deduct $5 per square foot of home office space, up to 300 sq ft (maximum $1,500). No need to track actual expenses like rent, utilities, or depreciation. Simple and low audit risk.
Actual Expense Method
Track actual home expenses (rent, mortgage interest, utilities, insurance, depreciation) and deduct the business-use percentage. Often yields a higher deduction but requires Form 8829 and detailed records.
Exclusive Use Test
The space must be used exclusively for business. A spare bedroom that is only used as an office qualifies; a kitchen table used for both business and personal meals does not.
Income Limitation
The deduction cannot exceed your gross business income minus all other business expenses. Under the simplified method, any excess is lost (no carryover). The actual method allows carrying forward the disallowed amount.
Eligibility Requirements
- Exclusive and regular use: The space must be used exclusively and regularly for business
- Principal place of business: The home office must be your primary business location
- Self-employed only: W-2 employees cannot claim the home office deduction (TCJA 2018-2025)
- Measurable space: You must know the square footage of the office area
Frequently Asked Questions
How does the simplified home office method work?
The simplified method deducts $5 per square foot of home office space, up to 300 square feet (maximum deduction $1,500). You don't need to track actual home expenses like rent, utilities, or depreciation. Just multiply your office square footage by $5, subject to the income limitation.
What are the home office requirements?
The space must be used exclusively and regularly as your principal place of business. "Exclusively" means the area is not used for any personal purposes. "Regularly" means you use it consistently for business. A dedicated spare bedroom used only as an office qualifies; a shared space like a dining table does not.
Can I carry over excess home office deduction?
Under the simplified method, any deduction that exceeds your gross business income minus other business expenses is lost—it cannot be carried over to future years. Under the actual expense method, the excess can be carried forward. This is a key difference to consider when choosing between methods.
Simplified vs. actual expense method: which is better?
The simplified method is easier and has lower audit risk, but the actual expense method often yields a higher deduction if your home expenses are significant (high rent, large home, expensive utilities). Consider using the actual method if your home office percentage times actual expenses exceeds $1,500. You can switch methods from year to year.