Can I deduct website security tools?

Yes—if the website is used for a business, website security tools are generally deductible as ordinary and necessary business expenses. Examples include SSL certificates, malware scanning, firewalls/WAF, security plugins, backup/security monitoring, vulnerability scanning, and managed security services.

How to deduct usually depends on what you bought:

• Recurring subscriptions or services: usually deducted as software, web hosting/IT, security, or other business expense in the year paid or incurred, depending on your accounting method.
• One-time software licenses or security equipment: may need to be capitalized and depreciated/amortized, though some small-business expensing rules may apply.
• Security costs bundled into building or launching a website: may be treated as part of website development costs rather than a simple current expense.
• Mixed business/personal website use: deduct only the business-use portion.

Keep invoices, subscription receipts, proof of payment, and notes showing the tool protects your business website. If you are an employee paying for your employer’s website tools yourself, unreimbursed employee expenses are generally not deductible on your federal return under current U.S. rules, though state rules may differ.

If this is for a U.S. business return, ask your tax preparer whether to categorize it under software, web services, IT/security, or website expense, and whether any capitalization rule applies.