Is Radon Mitigation Tax Deductible in Arizona?

If you have recently tested your home for radon and discovered elevated levels, installing a mitigation system is an absolute must for your family’s health. But as a homeowner, you are likely wondering about the financial side of things—specifically how to manage the cost of radon mitigation in Arizona. One of the most common questions we hear is: “Is radon mitigation tax deductible?” Whether you have already paid for a system or are currently budgeting for one, here is everything you need to know about tax deductions, state credits, and alternative ways to pay for radon mitigation in Arizona.

The Short Answer: Primary Residences

To cut right to the chase: No, there is currently no federal tax deduction or credit for installing a radon mitigation system in your primary residence. While the federal government offers robust Energy Efficient Home Improvement Credits for things like solar panels, heat pumps, and insulation, the IRS does not classify radon mitigation as an energy-efficient upgrade. For the average homeowner fixing up their primary house, the cost of the system is considered a capital improvement rather than a deductible expense.

Exceptions to the Rule

While standard homeowners cannot write off the expense, there are a few specific scenarios where the IRS does allow you to deduct the cost of radon mitigation:

• Rental Properties: If you are a landlord and install a system in a rental home, the IRS views this differently. You can generally deduct the cost as a business expense or depreciate it over time as a capital improvement to the property.

• Home Offices: If you operate a business out of your house and have a dedicated, IRS-compliant home office, you may be able to deduct a pro-rated portion of the mitigation system’s cost, based on the square footage of your office relative to the whole house.

• Commercial Buildings: Business owners who install radon mitigation systems in retail spaces or standard office buildings can typically deduct the installation as a standard commercial business maintenance or capital expense.

(Disclaimer: Always consult with a licensed CPA or tax professional to confirm your specific eligibility before claiming any of these deductions.)

Arizona State Tax Considerations

Many residents search for a specific radon mitigation tax credit Arizona offers to its taxpayers. Unfortunately, as of 2026, the state of Arizona does not currently have any state-level tax credits, rebates, or deductions specifically for residential radon mitigation.

The HSA/FSA Angle (A Potential Loophole)

Even though you may not be able to deduct the cost on your tax return, you might still be able to pay for your system using pre-tax dollars.

Under certain circumstances, the IRS allows homeowners to use funds from a Health Savings Account (HSA) or Flexible Spending Account (FSA) to pay for radon mitigation. Because radon is the second leading cause of lung cancer, mitigation can sometimes be classified as a medical expense.

To qualify for HSA or FSA reimbursement, you typically need:

1. A Letter of Medical Necessity (LMN): A written note from your primary care physician stating that mitigating the radon is medically necessary to prevent or treat a specific medical condition.

2. Elevated Test Results: Proof from a professional testing or continuous monitoring service that your home tested at or above the EPA’s action level of 4.0 pCi/L.

Always check with your specific HSA or FSA plan administrator first, as approval policies vary by provider.

How to Document the Expense

Even if you do not qualify for a tax deduction or HSA reimbursement today, it is crucial to document your radon mitigation expenses. Adding a permanent radon mitigation system to your house is considered a capital improvement. This means it adds to the “cost basis” of your home, which can help reduce your capital gains taxes when you eventually sell the property.

To protect yourself, always keep the following in your files:

• Pre-mitigation and post-mitigation radon test results.

• A fully itemized invoice detailing the materials and labor costs.

• The system’s warranty and certification documentation.

Need Help Documenting Your Mitigation?

We believe in making the administrative side of home safety as stress-free as the installation itself. If you are ready to fix your radon problem, get a written invoice and system documentation from us for your records. Contact our team today to ensure your home is protected and your paperwork is in order!