Practical regulations
Seismic bonus in a condominium: how to manage it
The seismic bonus for condominiums allows owners to deduct a significant share of expenses for antiseismic works on common parts, with rates that increase according to the risk reduction achieved. For the property manager, knowing the applicable rate is not enough: a correctly worded assembly resolution, a cost allocation consistent with ownership shares or specific criteria, solid technical documentation and impeccable payment traceability are all required, since tax authorities focus precisely on these elements during audits. This guide walks through the operational steps, from convening the assembly to keeping supporting documents, highlighting where mistakes happen most often.
The assembly resolution: quorum and content
Seismic risk reduction works on common parts fall under the innovations governed by the Italian Civil Code and require a resolution passed with the reinforced majorities set for costly innovations, unless the condominium bylaws already provide more favorable rules. The resolution must clearly state the scope of the works, the technician responsible for the seismic classification report, the estimated cost and the criterion used to allocate expenses among owners.
It is good practice to attach the sworn technical report certifying the seismic risk class before and after the works to the minutes, since it is precisely the reduction of one or two risk classes that determines the applicable deduction rate. Generic minutes lacking these references expose the condominium to disputes both in the financial statement and in any future tax audit.
Allocating the cost among owners
Allocation generally follows the general ownership shares, unless the works concern elements that the bylaws or the law assign differently, as in condominium complexes with buildings exposed to different risk levels. Each owner is entitled to know their own share of the cost and the corresponding share of the deduction, which accrues based on payments actually attributed to them in the financial statement.
For complexes with multiple buildings or staircases, the resolution must clarify whether the works cover the entire complex or only a portion of it, since this affects both the allocation criterion and the pool of owners entitled to the deduction: an owner who does not share in a given building does not share in the related deduction either.
Condominium management software that keeps general ownership shares distinct from any building or staircase specific shares significantly reduces the risk of errors at this stage, since it applies the correct criterion automatically without manual recalculation.
Technical and tax documentation to keep
In addition to the technical seismic classification report, the manager must keep the building permit (where required), supplier invoices issued to the condominium, bank transfers carrying the tax reference required by law, and the resolution together with the approved minutes.
The manager must also prepare and retain the list of owners with the expense share attributed to each of them: this is the document tax authorities request most frequently during audits, since it links the expense borne by the condominium to the individual owner's tax benefit.
Accounting traceability of payments
Every payment related to seismic bonus works must go through the condominium bank account via a tax compliant transfer and must be recorded in the financial statement with a code or description that distinguishes it from ordinary expenses, so that the progress of the deductible expense can be reconstructed at any time.
Keeping separate accounting for subsidized works, with clear evidence of the amounts paid by each owner, is the practical condition that allows the manager to quickly prepare the documentation an owner needs for their tax return or for transferring the tax credit. AmministraPro supports this traceability with dedicated expense codes and financial statements that isolate subsidized works from ordinary management, simplifying documentation at year end.
Frequently asked questions
What majority is required to approve the seismic bonus in the assembly
Seismic risk reduction works on common parts are innovations under the Italian Civil Code and require the reinforced majorities set for more burdensome innovations, calculated both on attendees and on the overall ownership shares of the building. It is also worth checking the condominium bylaws, which sometimes set additional quorums for works of this scale, and recording in the minutes both the constitutive quorum and the resolutive quorum actually reached.
Who can benefit from the deduction if not all owners share in the cost
The deduction belongs to whoever actually bore the expense, in proportion to their share as allocated by the assembly resolution. If the works concern only part of the building, such as a single staircase or a separate building within a larger complex, only the owners who share that common part contribute to the cost and accrue the related deduction, while the others remain unaffected by both the cost and the benefit.
Is the technical seismic classification report always mandatory
Yes, it is the document certifying the building's seismic risk class before and after the works, and it determines the applicable deduction rate, which increases with the risk reduction achieved. Without this technical certification it is not possible to demonstrate the seismic improvement required by law, so it should be requested from the appointed technician before works begin and attached to the condominium documentation.
How should payments be tracked to avoid jeopardizing the deduction
Every payment must be made via a tax compliant bank transfer from the condominium account, showing the correct legal references in the description, and must be recorded in the financial statement with separate evidence from ordinary management expenses. Condominium management software with dedicated codes for subsidized works, such as the one offered by AmministraPro, makes it possible to isolate these entries and reconstruct the payment status attributed to each owner at any time.
What happens if an owner sells their unit during seismic bonus works
The right to the deduction generally follows whoever bore the expense, but the parties can agree otherwise in the sale, expressly stating in the deed who is entitled to the remaining benefit. It is essential that the manager promptly provides the notary and the parties with the condominium documentation regarding the expense share and payments already made, to avoid later disputes between seller and buyer.
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