May 30, 2026. The window for notifying the Italian Revenue Agency of the year's SEZ investments closes. It is the third time the ritual repeats, but the first with one substantial difference: those who filed already knew the incentive will exist in 2027 and 2028 as well.
It sounds like an accounting detail. It is not. For anyone planning infrastructure investments — where years pass between decision and construction site — the difference between an incentive renewed year by year and a three-year incentive is the difference between a bet and an industrial plan.
1. Where the ZES Unica comes from
Decree-Law 124/2023 (converted by Law 162/2023) cleaned things up: the eight regional SEZs of Southern Italy, each with its own commissioner and perimeter, merged on January 1, 2024 into a single Special Economic Zone. Inside: every municipality of Abruzzo, Basilicata, Calabria, Campania, Molise, Puglia, Sicily and Sardinia. Since 2025, with Law 171/2025, Marche and Umbria joined: ten regions in total.
Two instruments matter:
- The tax credit on investments in capital goods and real estate
- The single authorization via the SEZ Digital One-Stop Shop (S.U.D. ZES), operational since March 1, 2024, with a procedure that closes in 60 days
This article covers the first. The second — and how it fits with the new single permitting procedure for data centers under Law 49/2026 — is the subject of our next piece.
2. The three-year window: the numbers on the table
The 2026 Budget Law allocated resources for three years:
| Year | Allocation | Cap per project |
|---|---|---|
| 2026 | €2,300 million | €100 million |
| 2027 | €1,000 million | to be defined |
| 2028 | €750 million | to be defined |
Three observations on the numbers.
First: 4 billion over three years is the longest commitment the measure has ever received. The SEZ credit was born annual, renewed each time with allocations between 1.8 and 2.2 billion. The political signal: the measure is now structural.
Second: the curve slopes downward — 2,300, 1,000, 750. Those who can pull investments forward to 2026 play with the largest pot. Those who wait until 2028 will compete for a third of the first year's resources.
Third: the €100 million cap per project says who this is for. This is not a measure designed only for warehouses: at those ceilings you finance factories, heavy logistics, digital infrastructure.
3. How it works, in practice
The mechanism has been road-tested over three annual cycles:
- Advance notification to the Revenue Agency (for 2026: March 31 to May 30) with expenses incurred since the start of the year plus those planned through December 31
- Pro-rata allocation: the Agency divides available resources by eligible claims and publishes the percentage actually usable
- Final notification with invoices and certifications
- Use as an offset in F24 tax payments
Rates follow the EU Regional Aid Map: up to 40% for large companies in the main Southern regions, plus 10 points for medium and 20 for small enterprises. The investment must remain in the area for at least five years.
4. The catch nobody puts in press releases: the pro-rata
The percentage published for the latest cycle is the most important and least quoted number: 60.3811%. It means that whoever was entitled to 100 of credit could offset 60.38 — because claims exceeded the allocation, and distribution is pro-quota.
The Marche and Umbria SEZs and the Simplified Logistics Zones, with smaller applicant pools, received 100%.
The consequence for financial planning is blunt: the SEZ credit belongs in your budget as a range, not a point estimate. A plan that only works if the incentive lands at 100% is not a plan, it is wishful thinking. The three-year window helps here too: those who do not saturate the cap in one year can spread investment tranches across three fiscal years.
5. Stacking: the silent multiplier
The SEZ credit can be combined with other incentives — including the 4.0/5.0 capital goods credits — within the limits of the cost incurred and the maximum intensities of the Regional Aid Map. For a technology investment in Southern Italy, the SEZ + digital transition combination is the real multiplier: two distinct instruments, two calculation bases, one project.
The fine print of stacking is not trivial and the Agency's practice is still settling. The advice here is unoriginal but honest: before booking the combination into your plan, have it validated by whoever signs the financial statements.
6. What this means for digital infrastructure
For SEZ purposes, a data center is an investment in capital goods and real estate in a subsidized area: almost the perfect use case for the measure. Concentrated capex, multi-year horizon, territorial roots well beyond the required five years.
For the Apulia Tech Hub project, the 2026-2028 window coincides with the campus development phase: the overlap between the investment curve and the allocation curve is not a calendar coincidence — it is one of the reasons Southern Italy now competes with Northern Europe's data center hubs on the cost of capital too.
The ZES Unica is no longer an experiment: it is a regime. And regimes, unlike experiments, can be put on a balance sheet.
Note: this article is for informational purposes only and does not constitute tax advice. Rates, caps and pro-rata percentages must be verified against official measures at the time of investment.