Quick Answer
Yes, you can deduct a home security system for business if it primarily protects your business assets or home office. For a system costing $2,400 annually that's 30% business-related, you can deduct $720. The key is documenting the business purpose and calculating the business-use percentage accurately.
Best Answer
Robert Kim, Tax Return Analyst
Best for entrepreneurs running businesses from home who need to protect equipment and workspace
When home security systems qualify as business deductions
Yes, you can deduct a home security system as a business expense, but only the portion that relates to your business use. The IRS allows this deduction when the security system primarily protects business assets, equipment, or your designated home office space.
The key requirement is establishing a clear business purpose. According to IRS Publication 587, home office expenses must be "ordinary and necessary" for your business. A security system qualifies when it protects business equipment, inventory, or client files stored in your home office.
Example: Calculating your security system deduction
Let's say you're a graphic designer with a home office that occupies 300 square feet of your 1,500-square-foot home (20% business use). Your security system costs $2,400 annually ($200/month monitoring + $400 annual equipment costs).
Method 1: Business-use percentage
Method 2: Primary business purpose
If you can document that the system primarily protects business assets worth $50,000 (equipment, inventory, files) versus $30,000 in personal property in the secured area:
Documentation requirements
To support your deduction, maintain these records:
Different deduction methods comparison
What expenses you can include
Fully deductible components:
Partially deductible components:
Key factors that affect your deduction
What you should do
1. Calculate your business-use percentage using the method most favorable to your situation
2. Document all security-related expenses and keep receipts
3. Create a business asset inventory showing what the system protects
4. Consider upgrading to business-grade features for areas with expensive equipment
5. Use our return-scanner tool to ensure you're capturing all eligible security deductions
Key takeaway: Most home-based businesses can deduct 20-60% of their security system costs, potentially saving $400-$1,500 annually in taxes depending on their setup and tax bracket.
*Sources: [IRS Publication 587](https://www.irs.gov/pub/irs-pdf/p587.pdf), [IRS Publication 535](https://www.irs.gov/pub/irs-pdf/p535.pdf)*
Key Takeaway: Home security systems are deductible business expenses when they protect business assets, with most home offices qualifying for 20-60% of total costs as deductions.
Security system deduction comparison by property type
| Property Type | Deduction Percentage | Documentation Needed | Annual Tax Savings* |
|---|---|---|---|
| Home office (20% business use) | 20% | Square footage calculation | $192-$288 |
| Full rental property | 100% | Rental receipts | $960-$1,440 |
| Mixed-use (60% rental) | 60% | Property allocation records | $576-$864 |
More Perspectives
Diana Flores, Tax Credits & Amendments Specialist
Best for landlords who install security systems to protect rental properties and improve tenant safety
Security systems for rental properties
As a rental property owner, security systems are generally 100% deductible business expenses since they protect your investment property and provide tenant safety. This is different from home-based businesses where you split personal and business use.
Example: Rental property security deduction
For a rental property with a $3,000 security system installation and $150/month monitoring:
In the 24% tax bracket, this saves you approximately $535 in taxes annually.
What qualifies for rental properties
Fully deductible expenses:
Documentation tips:
Key consideration for landlords
Installing quality security systems can justify higher rents while providing tax deductions. A $200/month rent increase (common with comprehensive security) generates $2,400 additional annual income while the security costs remain fully deductible.
Key takeaway: Rental property security systems are 100% deductible business expenses, often paying for themselves through higher rental rates and tenant retention.
Key Takeaway: Rental property security systems are fully deductible business expenses that often pay for themselves through increased rental income and better tenant retention.
Robert Kim, Tax Return Analyst
Best for those who live in part of their property while renting out other portions
Security systems for mixed-use properties
When you live in part of your property and rent out the rest, security system deductions become more complex. You'll need to allocate costs between personal use and rental business use based on the protected areas.
Allocation methods for mixed-use properties
Square footage method:
If you rent out 60% of your property's square footage, you can deduct 60% of security costs.
Example: $2,400 annual security costs × 60% rental use = $1,440 deduction
Protected area method:
Allocate based on which areas the security system actually monitors:
Documentation requirements
The IRS expects reasonable allocation methods consistently applied year over year.
Key takeaway: Mixed-use property owners can deduct the rental portion of security costs, typically 50-80% depending on property layout and system coverage.
Key Takeaway: Mixed-use property owners can deduct security system costs proportionally based on rental use, typically ranging from 50-80% of total expenses.
Sources
- IRS Publication 587 — Business Use of Your Home
- IRS Publication 535 — Business Expenses
Reviewed by Robert Kim, Tax Return Analyst on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.