Key figures — as of 2026-09-15: Contracts must be formalised (deed + credit agreement signed) by 31 December 2026 to qualify — no confirmed extension into 2027 — Government added €750 million in April 2026, taking the total guarantee envelope to roughly €2.3 billion — Q2 2026 alone saw 7,800 contracts worth €1.7 billion signed under the scheme — full IMT/Stamp Duty exemption applies up to €330,539 (partial to €660,982).
Why the date on the calendar matters
If you're a foreign resident under 35 hoping to buy a first home in Portugal without a hefty deposit, the relevant number isn't a price or a rate — it's a date. 31 December 2026. After that, the state-backed mortgage guarantee that currently lets eligible buyers finance up to 100% of a property's value simply stops applying to new contracts, unless the government decides otherwise. To benefit from the public guarantee, the credit contract must be signed by 31 December 2026.
The scheme — formally the Garantia Pública no Crédito Habitação Jovem, created under Decree-Law 44/2024 — has become one of the most-used housing measures in the country this year. In the second quarter of 2026 alone, 7,800 home loan contracts were signed with the state guarantee, worth €1.7 billion, representing 51.3% of all contracts and 53.5% of the total value contracted by buyers under 35 in the period — a 13.5% rise in contract numbers and 17.5% growth in value versus the previous quarter. Demand has run so far ahead of expectations that the government announced a €750 million reinforcement to the guarantee in April 2026, pushing the total available amount to around €2.3 billion.
What the guarantee actually does — and who qualifies
The state acts as guarantor for part of the loan — up to 15% of the initially contracted value — which can let a bank finance up to 100% of the lower of the purchase price or the property's appraised value. In practice, that removes the need for the 10–20% deposit Portuguese banks normally expect. Crucially for our readers, this isn't a residents-only perk: the State Guarantee applies to non-Portuguese nationals as long as they meet the same eligibility criteria, including holding tax residency in Portugal.
Eligibility is fairly narrow but achievable for many relocating foreigners: applicants must be between 18 and 35 years old (if there are two applicants, both must meet this age limit) and declare that the property will be their first permanent home. The purchase also needs to be primary-residence only — second homes, rental properties, and commercial units are excluded from the scheme. Once signed, the state guarantee itself remains valid for 10 years from the date the contract is signed.
Alongside the financing guarantee sits a parallel tax break, "IMT Jovem": a full exemption from IMT (property transfer tax) and Stamp Duty on properties up to €330,539, with partial exemption between that threshold and €660,982, and no exemption above it.
GrowIN's calculation: what this is actually worth to a buyer
Strip away the policy language and look at the euros. On a €300,000 first home, the state's 15% guarantee backs roughly €45,000 of the loan — that's the deposit money a young foreign buyer effectively doesn't need to have saved. Layer on the IMT and Stamp Duty exemption (the property sits comfortably under the €330,539 full-exemption ceiling) and, using typical resident transfer-tax bands, a buyer could plausibly avoid somewhere in the region of €8,000–€13,000 in IMT plus the 0.8% Stamp Duty on the purchase. Combined, that's a realistic €50,000+ swing in upfront cash needed to buy the same house before and after 1 January 2027 — money a foreign resident would otherwise need to have sitting in a Portuguese account before they could even get to the notary.
"For a young foreign resident weighing whether to rent another year or buy now, this deadline is the single biggest financial variable in that decision," says GrowIN Portugal Editorial.
The practical squeeze — and what happens if you miss it
The tight part isn't eligibility, it's timing. What counts for the deadline is not when the process starts, nor the date of the promissory contract (CPCV) — it's the date of the actual deed and the definitive credit contract. And that pipeline isn't instant: between choosing a property, loan approval, valuation and scheduling the deed, the process can take several weeks, sometimes more than two months. Anyone starting their house hunt in Portugal now, in September, is already working against the clock if they want a deed signed before year-end.
Adding friction, tighter affordability rules kicked in mid-year — new rules on debt-to-income ratios and maximum loan terms have applied since 1 August 2026, and they affect solvency assessments for under-35 buyers too. More banks have joined the programme recently, which helps: from 1 August 2026, four more banking institutions joined the state guarantee scheme, confirmed by the Instituto da Habitação e da Reabilitação Urbana, extending 100% financing without an upfront deposit. But more participating banks doesn't buy back lost weeks if a mortgage application only starts in November.
What to watch next
No government body has confirmed whether the guarantee will be extended, scaled back, or allowed to lapse after 31 December 2026 — so far there is no confirmation that these supports will be extended into 2027, and waiting could mean borrowing under different, and more expensive, conditions. Foreign residents who already hold a NIF, tax residency, and are house-hunting should treat autumn 2026 as the realistic window to get an application into a bank, not December. For anyone still sorting out residency status before they can even qualify as a tax resident, our /visas/ hub covers the routes — D7, D8 and others — that establish the residency needed to access schemes like this one.
Whatever the government decides for 2027, this year's deadline is fixed, and it isn't moving for anyone still gathering paperwork in the new year.