Operational Guide to Tax Benefits
Renovation Bonus for Radon Mitigation
A concrete, step-by-step guide to recovering 50% of the costs incurred to protect your home from Radon gas in Italy, from building permits to tracing payments.
1. What is the 50% Renovation Bonus?
The tax deduction for building renovations (commonly known as Bonus Casa) is the main facilitation granted by the Italian Revenue Agency (Agenzia delle Entrate) to encourage testing, safety, and improvement of the Italian housing heritage. It consists of the possibility of deducting 50% of the expenses incurred from IRPEF taxes, up to a maximum limit of 96,000 euros for each real estate unit.
The recovery of the amount takes place through ten annual installments of equal amount in the tax return. Tackling the Radon Gas problem is not only a regulatory obligation and a duty for health protection, but thanks to this measure, it also becomes an investment largely covered by the State.
2. Which Anti-Radon interventions are eligible?
The Revenue Agency admits to the deduction the expenses incurred for extraordinary maintenance, restoration and conservative remediation, and building renovation.
The physical works and technical services aimed at reducing the radon concentration in buildings (especially in ground floors and basements) fully fall into the category of extraordinary maintenance related to sanitary health works. Specifically, you can deduct:
- Design and Diagnosis: fees for qualified personnel or laboratories performing preventive and post-operative Radon measurements, as well as the drafting of the remediation project.
- Structural Building Works: creation of ventilated crawl spaces (via igloos or formworks), floor excavations, installation of vapor barriers or anti-radon membranes.
- Extraction Systems: purchase and installation of forced extraction systems, vent pipes for traps (radon sumps), and even Controlled Mechanical Ventilation (CMV) systems if certified as part of the remediation.
- Administrative Charges: municipal permits, taxes, stamp duties, or urbanization charges related to the building practice.
3. Necessary building practices (CILA and SCIA)
To benefit from the bonus, it is not enough for the company to just perform the work and issue an invoice. For the work to be formally recognized as "extraordinary maintenance", it is essential that it is preceded by an adequate municipal building permit submitted by a qualified technician (surveyor, architect, or engineer).
Which procedure to present?
Depending on the severity of the structural intervention, you will usually need:
- CILA (Sworn Notice of Commencement of Works): suitable for the insertion of extraction wells (radon sumps), mechanical ventilation systems, or internal sealants that do not touch "heavy" structural parts.
- SCIA (Certified Declaration of Commencement of Business/Works): mandatory when the remediation involves modifications to structural elements, such as digging out the floor to cast new foundations or reinforcing load-bearing walls to build a new ventilated crawl space.
The opening date of the file in the Municipality formally proves the start date of the works. Bear in mind that preventive professional expenses (e.g., measurements or calculation designs) can also be incurred before the CILA opening date, and are still deductible provided they strictly correlate to the subsequent works.
4. How to make payments: The "Bonifico Parlante"
This is the aspect where people most often make unforgivable mistakes. To deduct the expense, you cannot pay in cash, by cheque, or with an ordinary bank transfer. You must obligatorily use the so-called "Bonifico Bancario Parlante" (Traceable Bank Transfer) for Building Renovations (Art. 16-bis of D.P.R. 917/1986).
All home banking apps or physical branches include a specific screen for these payments. The transfer must explicitly indicate:
- The Payment Reason ("Causale"), referencing the facilitating law (e.g., "Bonifico per lavori di ristrutturazione edilizia - agevolazione fiscale art. 16-bis D.P.R. 917/1986").
- The Tax Code (Codice Fiscale) of the deduction beneficiary (the homeowner or the person bearing the expense).
- The VAT Number (Partita IVA) (or Tax Code) of the building company, technician, or laboratory that carried out the work and to whom the transfer is addressed.
Attention: If you forget to use the "bonifico parlante" and use an ordinary one, you permanently lose the right to the deduction, unless you obtain a specific substitute declaration from the company stating that they have registered the collection in their tax returns.
5. Documentation to keep for inspections
The Revenue Agency has the right to carry out documentary checks until the expiration of the last year in which you distribute the deduction. Therefore, documents must be scrupulously kept for over a decade.
Here is the complete list of the "Radon Remediation" folder you should keep at home:
- Building Practice: CILA or SCIA with the municipal registration receipt.
- Invoices or Tax Receipts: proving all expenses incurred (company, laboratory, architect).
- "Bonifico Parlante" Receipts: proving the moment of payment.
- Technical Reports: the official Radon measurement reports "Ante" (before) and especially "Post" (after) operam, drafted by a qualified technician, which certify the actual sanitary-health remediation of the environment.
6. Tax Focus: When is VAT at 10% or 22%?
Many clients take it for granted that the subsidized 10% VAT is always applicable to every single supply for renovation works. In reality, Italian law makes a clear distinction between those who physically carry out the works and those who provide purely professional or intellectual services.
Here is how to calculate VAT in the delicate field of Radon risk:
Direct Billing of Professionals
Pure professional services billed independently (such as the fee of the person who drafts the project to eliminate radon, or the invoice from the laboratory/technician for physically executing the measurement) are classified as "intellectual work services." The Revenue Agency has reiterated that these services never enjoy the subsidized VAT, even if mandatory for the construction site. Therefore, they will carry 22% VAT.
Building Companies and General Contractors
The subsidized 10% VAT is strictly applied to the provision of services for the physical execution of works through Procurement Contracts (Appalti). If a single building company takes charge not only of the physical work, but incorporates within its turnkey contract also the costs it will face to pay the measurement professionals, the entire invoice of the contractor to the final client will benefit from the 10% VAT.
💡 The most important thing to remember:
Regardless of the VAT applied (10% or 22%), the entire amount you pay, provided it is made via traceable bank transfer (bonifico parlante) and refers to a correct building permit, will end up entirely in the total to be 50% deducted from IRPEF. No money is lost.
Frequently Asked Questions (FAQ)
The most common doubts about tax deductions for anti-radon works
Does the measurement with dosimeters alone qualify for the 50% Bonus?
No, if it is an investigation in itself. Diagnostic and professional expenses become 50% deductible only if they are preparatory to and strictly correlated with an actual building remediation or renovation intervention (for which a municipal building permit, e.g., CILA/SCIA, has been opened).
What happens if the professional technician has an invoice separate from the builder?
The independent technician's invoice (which has standard VAT) will still be 50% deductible. To obtain the benefit, the fundamental precaution will be to pay it via the Bonifico Parlante (Traceable Bank Transfer for renovation) and keep the invoice together with the technical reports that demonstrate the connection with the remediation interventions.
Can new constructions access the Renovation Bonus?
Absolutely not. The Home Bonus covers exclusively already existing and registered properties. Building an anti-radon crawl space under a new construction falls within normal current construction obligations, whose manufacturing systems (and associated expenses) do not enjoy the deductions related to recoveries or renovations.
Can I pay in multiple installments and still have the deduction?
Sure. Work progress payments (SAL) or deferred payments are often agreed upon. No tax benefit will be lost, provided that each installment/advance is strictly paid by Traceable Bank Transfer (Bonifico Parlante), correctly reporting the legal references and the progressive number of the reference invoice or advance.
Who can benefit from the Renovation Bonus?
In addition to the property owners, holders of real/personal enjoyment rights (usufructuaries, tenants, borrowers) who bear the expenses can also benefit from the deduction, provided they have the owner's consent to carry out the works.
Can I use the Bonus if anti-radon works are the only intervention?
Yes. Even if you are not renovating the whole house, interventions aimed at eliminating the radon risk, protecting health, are configured as "extraordinary maintenance." It will be enough to activate the appropriate building practice (e.g., CILA) explicitly indicating this purpose.
Is there a time limit to carry out and pay for the works?
The expenses must be incurred (i.e., transferred) within the period of validity of the legislation in force (the Home Bonus is generally extended from year to year by the Budget Law). The date on which the traceable bank transfer is made is what counts.
What happens in case of sale of the property?
If you sell the house before the 10 years have passed, the remaining installments of the Bonus are automatically transferred to the buyer of the property, unless there is a different written agreement specified in the deed of sale (the seller can decide to continue enjoying it).
Can it be combined with the Ecobonus for energy savings?
Partly. If the anti-radon intervention includes advanced thermal insulation (e.g., insulation of the floor against the ground), you might access the Ecobonus. However, you cannot deduct the same expense twice. It is necessary to choose or separate the accounting amounts between the two facilitations.
What happens if I exceed the 96,000 euro spending limit?
The ceiling of 96,000 euros is the maximum eligible limit per single real estate unit for renovation works undertaken in the same year. Every euro spent beyond this threshold will not contribute to the creation of the 50% deduction.
Tackle remediation without tax surprises
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