Building tax incentives in Italy: a guide to the deductions

The 2026 budget law extended for the whole year the regime already in force in 2025, with a distinction running through the entire subject. The distinction concerns the use of the property unit.

Until 2024 the rate depended on the type of work. Since 2025 it depends on the use of the property being worked on.

It is the deepest change in the recent system and the one that most alters estimating work. The gap between the two rates is fourteen points: on works at the renovation deduction cap the difference in total benefit exceeds thirteen thousand euros.

The framework of deductions in force and their scope is covered in The building tax incentives currently available. That page is worth reading before the detailed ones.

One warning must come before anything else, because it conditions the use of any documentation found online. It concerns the rates given by sources published in earlier years.

The 2025 budget law had scheduled a reduction in the rates from 2026. The 2026 budget law suspended that reduction, extending the more favourable conditions for the whole year and pushing the step down back by one year.

Anyone consulting a guide published in 2025 will therefore find rates given for 2026 that are no longer those applying. Successive extensions changed the rates that had been announced.

The same phenomenon recurs on a second front. Many sources still report, for the seismic deduction, the enhanced rates tied to risk class improvement, between 70 and 85 per cent, which have not applied since 2025.

A method rule follows that holds for the whole field: the primary sources are the text of the year's budget law and the tax guide published by the revenue administration, and any figure taken from elsewhere should be checked against them before being passed to a client. No secondary source is sufficient on its own.

The scope of the four reliefs does not coincide, and choosing the applicable one precedes any calculation. Overlaps exist but cannot be combined on the same expenditure.

This is the reference deduction, the one with the widest scope, founded on the article of the income tax code devoted to the recovery of building stock. It covers building recovery in its broadest sense.

It covers extraordinary maintenance, conservative restoration and rehabilitation, and building restructuring on individual units, and extends to routine maintenance on the common parts of residential buildings. It also covers the removal of architectural barriers, prevention of unlawful acts, cabling and the creation of appurtenant garages.

The cap is 96,000 euros per property unit and the deduction is spread over ten annual instalments. The number of units is counted at the start of the works.

From 2026 it has absorbed the accessibility incentive, which at 75 per cent stopped at expenditure incurred to the end of 2025. Accessibility works remain eligible but at the renovation deduction's rates and caps, and estimates prepared under the earlier rules cannot be carried over.

The full scope is covered in The renovation tax deduction. That page lists the eligible items and those excluded.

This covers energy upgrading and differs in three respects: an access requirement, differentiated caps and detailed technical requirements. The three respects are checked separately and in order.

The access requirement is that the building be existing and already have a heating system. The check precedes any assessment of eligibility.

The caps are not single but differentiated by type of work, with limits the technical rules set for opaque elements, for windows and solar thermal, and for heating systems. Where several different types of work are carried out, their caps are added together.

One technical qualification should be known because most sources omit it: the historic caps of this deduction are in several cases expressed as a maximum deduction rather than a spending limit. They must therefore be read together with the year's rate, and a table of caps is not enough to size the benefit.

A recent limitation changes building services design: works replacing winter heating systems with single boilers fuelled by fossil fuels, including condensing ones, are no longer eligible. Heat pumps, hybrid systems, biomass generators and micro cogeneration units remain eligible.

The full picture is covered in The energy efficiency deduction. It sets out the caps by type of intervention.

This supports works reducing seismic risk on buildings in seismic zones 1, 2 and 3. Zone 4 is excluded, and no particular use is required: non residential property also qualifies.

It is the deduction that has undergone the deepest transformation. Until 2024 the rate depended on the improvement in risk class, with percentages rising to 70 and 80 per cent on individual units and to 75 and 85 per cent on common parts. Since 2025 that mechanism no longer operates and the rate is single.

The certification requirement, by contrast, remains fully in force. The effectiveness of the works is certified by the professionals responsible for the structural design, for supervising the structural works and for the structural inspection, who attest the risk class before and after the works and that the expenditure is reasonable.

One effect deserves stating: because the rate no longer rewards a class improvement, the choice of intervention level returns to resting on independent technical and financial considerations rather than on marginal tax yield. The choice of intervention level therefore returns to being a design decision.

This is not free standing: it is tied to building recovery works and allows the purchase of furniture and large appliances to be deducted within a cap of 5,000 euros per property unit. The link with the building works is a condition of access.

The condition that most frequently forfeits the benefit is one of timing. The purchase must be linked to works started no earlier than the preceding year, and the works must have started before the purchase. The chronological order cannot be reversed and the position cannot be cured afterwards.

The cap is independent of the one for the building works: it is neither added to it nor consumed by it. The two deductions therefore combine on the same site.

Access depends on three conditions to be checked together and in order: who incurs the expenditure, on which property, and with what tax capacity. The order matters because the first condition conditions the other two.

The first establishes whether there is a claimant. The right belongs to whoever incurs the expenditure while holding a title over the property, and the field includes owners, holders of rights in rem, occupiers with a title bearing a certain date preceding the start of the works and, on defined conditions, cohabiting family members and de facto partners.

The costliest error at this stage concerns the match between who pays and who claims: the invoice and the payer must be consistent with the position of the person intending to claim, and the arrangement cannot be corrected after the first payment. It must therefore be settled before the first payment.

The second condition determines the rate. The tax meaning of main home has its own content, resting on habitual residence, and does not coincide with registration alone.

The third determines whether the deduction can actually be used, and is covered below. It belongs to the tax adviser and not to the professional.

The full picture is covered in Who can claim building tax incentives. It distinguishes holders of real rights from occupiers.

Between the expenditure incurred and the benefit received sit four successive filters. Each reduces the outcome, and an estimate considering only one returns a figure the client will never see.

The order is binding. Applying the rate to the total cost of the works without having filtered eligible expenditure and applied the cap produces a systematic overstatement.

This does not concern the works alone. It covers the professional services connected with the project and the charges necessary to deliver it, within the scope of each regime.

For a practice this has direct commercial significance: its own services fall within the eligible base. Professional fees should therefore be shown separately in the bill of quantities.

The caps attach to the property unit and not to the building. A project covering several units has several caps, and identifying the units bears directly on the benefit.

One rule should be known because it produces the largest overstatements: the cap is assessed on the units existing at the start of the works. Subdivision during the works does not multiply the allowance, while a merger preserves the starting caps.

The caps and the rules on combining reliefs are covered in Spending caps. The rules on combining are the least intuitive part of the subject.

A deduction reduces the tax due and presupposes that tax exists. A taxpayer without sufficient gross tax loses the annual instalment, which is neither refundable nor carried forward.

Because the relief is spread over ten years, the check concerns every tax year and not only the first. To this is added the overall cap applying to taxpayers with income above the threshold, which operates on annual deductible expenditure.

The full calculation is covered in Calculating and claiming the deduction. It sets out the spreading over annual instalments.

This is the branch bearing directly on the professional's work, and it falls into three families with different logics. The three families are the certifications, the notifications and the records.

Technical certifications, where required, attest on two distinct planes: that the works meet the requirements, and that the expenditure is reasonable. The second is the aspect of greatest exposure, and is defended on whether the items in the bill of quantities can be traced to documented price references.

The electronic notification concerns only works with an energy content and must be transmitted within ninety days of completion or of final inspection. It is the deadline bound formality most frequently omitted, because it falls at the closing of the site. One thing should be known: the omission is not final and can be cured through the late filing remedy, by paying a penalty before the first available tax return.

The records to retain comprise invoices, traceable payments, building consents or a substitute declaration on the start date of the works, documentation of planning regularity and, in buildings under common ownership, the building manager's certificate. The list must be built on site rather than afterwards.

Three elements become irrecoverable once the site closes: the data of the systems removed, the photographic record of the state before the works, and the consistency between invoicing and payments. None of the three can be reconstructed after the works end.

The full picture is covered in The technical formalities of building tax incentives. It lists the deadline bound formalities.

A deduction does not close with the tax return. Each annual instalment opens its own assessment period, and on a ten year deduction exposure extends well beyond completion of the works.

Audits focus on recurring elements: compliance of the payment method, existence and consistency of the building consents, connection of the expenditure, timeliness of electronic formalities and soundness of the certifications. The same elements recur in almost every assessment.

The Superbonus is no longer available and its closure is final, but its legacy remains operational: instalments still being claimed, transferred credits in circulation, suspended positions and litigation still running. For a practice that worked in that period, those files are not dead archives.

The credit transfer and invoice discount options, which allowed the benefit to be monetised immediately, were subject to a general block and their availability today is residual. The principle is reversed compared with past years: the rule is direct use in the tax return, and the alternatives are the exception.

The practical consequence is that checking tax capacity has returned to the centre of the feasibility assessment. A client without sufficient tax capacity bears the gross cost of the works.

What remains available is covered in Credit transfer and invoice discount: what remains, and the audit picture in Audits and the end of the Superbonus. The two pages are best read together.

Two planes remain distinct and should be kept separate, because confusing them creates expectations neither regime satisfies. The building plane and the tax plane have independent conditions.

A tax relief does not replace the building consent and does not alter its regime. Eligible works remain subject to whatever consent the building rules assign to them, and works carried out without the required consent do not become regular because a deduction was claimed.

The relationship works the other way round. The documents evidencing the building and planning regularity of the works form part of what must be retained for deduction purposes, and are among the elements audits focus on most frequently.

A working sequence follows that holds for every appointment on existing stock. The sequence has four steps and the order is binding.

Reconstruct the property's lawful status, because it is the premise both of the building application and of the tax file. Eligible works carried out on a property whose lawfulness cannot be demonstrated present a risk the deduction does not mitigate in any way.

Classify the works under the building rules and identify the consent required, checking whether they alter the overall volume or involve a change of use, which affect both the building regime and the eligibility of particular items. Building classification therefore precedes the tax assessment.

Check eligibility for the relief and identify the applicable deduction. The check is made item by item rather than on the works as a whole.

Build the building application and the tax file in parallel, since they share a substantial part of the documentation. Building them in parallel avoids producing the same documents twice.

Reversing the first two steps leads to shaping a project around an expected tax benefit and then discovering that the consent required changes its scope or that the existing building does not permit it. The reversal is the most frequent method error in this field.

Works on common parts follow a logic that should be explained to the general meeting before works begin, because it contradicts the intuition of a benefit equal for all. The benefit is distributed by share and not in equal parts.

The expenditure is incurred by the owners' association, but the deduction belongs to each owner in proportion to their share or under whatever different allocation has been resolved. A resolution can therefore change the allocation basis.

Four consequences follow that the professional instructed must know. The four concern tax capacity, deadlines and documentation.

The rate is determined owner by owner, according to the use of each unit. In the same building, for the same works on common parts, some owners will apply 50 per cent and others 36 per cent.

Tax capacity is assessed individually. An owner without capacity loses their instalment without affecting the others, and their position is neither known nor knowable by the professional.

The document supporting the individual deduction is the building manager's certificate, attesting to each owner the share of expenditure attributable to them. The professional produces the material on which that certificate rests: the accounts for the works and, where several reliefs apply, the separation of items by deduction.

Communication to the general meeting therefore cannot state a single net benefit. What should be presented is the total expenditure, the allocation criterion and the calculation method, leaving each owner and their adviser to determine their own outcome.

One final observation. On substantial works to common parts, the unevenness of individual benefits is among the most frequent causes of conflict at general meetings, and anticipating it when presenting is more effective than managing it afterwards.

The preceding sections compose into a sequence of checks best carried out at the start of the appointment, when they take a few minutes, rather than during the works, when some are no longer correctable. Some of these checks are no longer possible once the site closes.

Six questions cover the set up.

Who will incur the expenditure and intends to claim, and if there are several, in what proportions. The addressing of invoices and the identity of the payer follow from that answer.

On what basis the claimant holds the property, and whether that title bears a certain date preceding the start of the works. The check is decisive for occupiers, borrowers under a loan for use and cohabiting family members.

Whether the unit is the claimant's main home, because it determines the rate and therefore the financial plan of the project. Use should be verified against documents rather than a verbal statement.

How many property units exist at the start of the works, because the cap multiplies by that number and a later subdivision does not increase it. The count should be documented with the land registry plan.

Which deduction or deductions apply, because caps, formalities and the structure of the bill of quantities all follow from that. Several deductions may coexist on distinct expenditure items.

Which deadline bound formalities will be triggered at the closing of the site, to be placed on the closing checklist from the outset alongside final inspection and handover. The periods run from the end of the works and not from handover.

To these should be added a check that does not belong to the professional but should be prompted: the claimant's tax capacity over the ten year horizon, to be assessed with their adviser before committing to the works. The check should be prompted at the start and not at the end of the appointment.

The scope of responsibility must be drawn precisely, because the subject is fiscal while the formalities are technical. The boundary is worth setting out in writing in the letter of engagement.

To the professional belong identifying which formalities apply, giving the certifications due, electronic transmission where instructed, producing the technical documentation, and structuring the bill of quantities so that the eligible base can be identified. None of those activities includes assessing tax capacity.

To the client and their tax adviser belong checking the personal conditions, assessing tax capacity, retaining the expenditure records and claiming the deduction in the return. The professional flags the point but does not replace the adviser.

Two observations complete the picture.

A certification given for tax purposes exposes whoever signs it within tax assessment periods rather than contractual ones. Retention of the supporting material must therefore be aligned with that horizon.

Contractual clarity on who does what is the most effective safeguard. Much of the dispute between professional and client in this field arises from formalities neither thought were theirs to complete.

The right form of communication follows directly from the structure of the calculation. Each element of the calculation should be shown with its assumption.

Present the eligible expenditure, the cap applied with the number of units assumed, the rate and the assumption about use it rests on, and the resulting annual instalment. The presentation should carry the assumptions made.

State that actual use depends on the client's tax capacity and, where relevant, on the higher income cap, referring the matter to their adviser. The reservation should be given in writing rather than orally.

What should not be presented is a single net figure described as a discount. It is the format clients ask for, and it is the one exposing the professional on ground outside their competence.

One observation on comparing quotations closes the point. Two quotations may differ in gross amount and coincide in net benefit, or the reverse, depending on how items are split between eligible and ineligible. The structure of the bill of quantities then becomes part of the proposal rather than a technical detail.

A wider view of recent years helps in understanding where the system has settled and why. The settlement reflects the cost of the credit transfer years.

The Superbonus period combined a rate above one hundred per cent with mechanisms for immediate monetisation. The combination produced an unprecedented volume of works, but also an effect worth isolating because it is instructive: a rate above one hundred per cent removes the client's interest in containing costs, and shifts the whole burden of policing the reasonableness of expenditure onto the certifying professional.

The litigation that followed indeed concentrates on three areas: the soundness of certifications, the reasonableness of expenditure, and the allocation of liability between client, contractor, professional and credit transferee. All three areas concern the documentary stage.

The current system has reversed all three elements. Rates are below one hundred per cent, which restores the client's interest in containing costs. Monetisation options are residual, which brings tax capacity back to the centre of feasibility. And the structure of the deductions is simpler, with three main reliefs rather than the earlier layering.

For a technical professional this produces a more legible and structurally less risky context than that of past years. Two points of permanent attention remain.

The first is legislative volatility. This area is revised by each budget law, and outdated sources remain indexed for a long time. Checking the conditions in force is not an occasional task but a routine.

The second is the asymmetry of deadlines. The professional's exposure follows tax deadlines rather than contractual ones, and this should be built into how a practice is organised through retention policies aligned with that horizon.

Applying the enhanced rate without checking the use of the unit is the first. The check is made against residence documents and the land registry record.

Applying the rate to the total cost of the works rather than to the filtered base is the second, and produces a systematic overstatement. The base must be filtered item by item before the rate is applied.

Assuming that subdivision multiplies the cap is the third. The number of units is counted at the start of the works.

Using the seismic rates tied to class improvement is the fourth, and reflects an outdated source. The link with class improvement no longer applies.

Misaligning the invoice and the payer is the fifth, and is irreversible. A payment already made cannot be corrected.

Buying furniture before the works start is the sixth. The chronological order is a condition of access to the furniture deduction.

Postponing the building of the file to the closing of the site is the seventh. Some documents can no longer be produced once the works are complete.

Treating the omission of the electronic notification as irremediable is the eighth, and gives up a recoverable benefit. Late remedy is available within the periods provided.

Assuming credit transfer is available is the ninth. What remains is very narrow and must be checked case by case.

Presenting the deduction as an immediate discount is the tenth. The deduction is spread over ten years and depends on tax capacity.