Direct answer: buying or building a first home as a modular house in Portugal, if you are under 35, unlocks 5 stackable fiscal and financial benefits: (1) IMT exemption up to €316,772 of VPT (permanent young regime since 2024), (2) IRS Jovem income tax relief up to the 10th year of career, (3) public state guarantee enabling LTV up to 90-100% (previously up to 15% extra at some banks), (4) access to the 1.º Direito programme (IHRU support for those proving housing need), (5) IRS deductions for own permanent residence costs. This article details each benefit with real figures and the application process.
The combination of young regime (IMT 0) + IRS Jovem + public state guarantee has made the first home for under 35s one of the most favourable regimes in force in the European framework. But the rules and stacking have changed significantly since 2024, and many young buyers lose benefits by not knowing them. This article is the complete cross-reference, applicable to any habitable and legalised modular house in Portugal.
For a general financing overview, see turnkey modular home financing. For the fiscal IMT/IMI side, see deed, IMT and IMI.
Benefit 1 — IMT 0 up to €316,772 (permanent young regime)
Since the 2024 reform (Law No. 42/2024), the IMT exemption on the first acquisition of own permanent residence by under 35s is no longer a temporary measure and is a permanent regime of the IMT Code. Rules:
- Age: buyer under 35 at the date of acquisition. For couples, both must be < 35 for the full exemption.
- Value: full exemption up to €316,772 of VPT or price (whichever is higher, 2026). Between €316,772 and €633,453: partial exemption (only on the excess, taxed at 5%).
- Condition: used as own permanent residence (proven by fiscal address registration), for 6 consecutive years. Early change forces proportional repayment of the tax.
- Stamp duty: parallel exemption (previously 0.8% on the transfer value) under the same conditions.
On a turnkey T2 modular house at €253,750 + urban plot at €60,000 (total €313,750, below the limit), a single young buyer saves around €18,000-22,000 in IMT compared with the general regime (6% on the price, with stepped deductions). For couples, the saving is similar.
Benefit 2 — IRS Jovem up to the 10th year of career
Independently of the first home, IRS Jovem (article 12.º-B of the CIRS, updated in 2024) offers progressive tax relief on employment and self-employment income:
| Year of career | IRS exemption (%) | Annual cap (2026) |
|---|---|---|
| 1st year | 100% | up to 28 IAS (~€15,000) |
| 2nd to 4th year | 75% | up to 22 IAS (~€12,000) |
| 5th to 7th year | 50% | up to 15 IAS (~€8,000) |
| 8th to 10th year | 25% | up to 8 IAS (~€4,300) |
IRS Jovem is stackable with the young IMT exemption. Typical impact: a young engineer earning €32,000 gross/year in the 2nd year of career saves €2,500-3,500/year in IRS, freeing up capacity for a mortgage instalment. Over 7 years, cumulative savings exceed €15,000 — equivalent to 5-7% deposit on the house.
Benefit 3 — Public state guarantee for young housing credit
Decree-Law 44/2024 created the public state guarantee for young housing credit, allowing banks to lend beyond the typical 90% LTV with a state guarantee over the extra portion:
- Age: < 35 at the date of contract.
- Value: state cover up to 15% of the transaction value, enabling an effective LTV of up to 100%.
- Limit: property up to €450,000 of transaction value.
- Term: up to 60 consecutive years, up to age 70 of the youngest borrower.
- Rate: standard market conditions (no special rate), but the public guarantee reduces bank risk and opens access to young buyers without significant own capital.
Real case: couple aged 29 and 30, joint income €55,000/year, buy a modular house at €300,000 without own capital. Before the state guarantee, they would need €30,000-60,000 deposit; with the guarantee, the bank accepts 95% LTV and they only pay closing costs (€3,000-5,000).
Benefit 4 — 1.º Direito Programme (IHRU)
The 1.º Direito Programme (Law No. 118/2019, updated 2024) is public support from IHRU (Institute for Housing and Urban Rehabilitation) for people in a housing need situation. Typical scope:
- Beneficiaries: households with income up to 5× IAS/month (2026: ~€2,700/month household).
- Direct support: up to 60% of the works or acquisition value, with a cap by typology (T0 €50,000, T1 €70,000, T2 €90,000, T3 €110,000, T4 €130,000). Values may be reviewed annually.
- Modality: non-refundable grant or subsidised loan depending on the socio-economic situation.
- Compatibility: compatible with young IMT and young IRS; not stackable with a commercial mortgage on the same property.
Application via habitacao.gov.pt portal or participating municipality, with socio-economic and technical review. Typical decision time: 3-6 months. Most common eligibility: single-parent families, households with income close to the IAS, people in precarious housing situations.
Benefit 5 — IRS deduction for own home costs
Regardless of age, any buyer of own permanent residence can deduct from IRS due (article 78.º-E of the CIRS):
- Mortgage interest: 15% of interest paid, up to €296/year (contracts signed before 2012). New post-2012 contracts: only benefits via specific programmes.
- Rent paid (when applicable): not applicable to buyers. Only to renters.
- Rehabilitated property: specific deductions in case of urban rehabilitation (urban rehabilitation tax regime).
- Class A or A+: indirect benefit — reduced electricity/heating costs generate non-fiscal but effective savings.
Benefit stacking: simulation for a young buyer
Realistic hypothetical case: single female buyer, 31 years old, 2nd year of career, income €32,000/year, buys a turnkey Passive House T2 modular home at €253,750 + plot €60,000 (total €313,750).
| Benefit applied | Value in euros |
|---|---|
| IMT exempt (young regime, €313,750 < €316,772) | ~€18,800 (vs general regime) |
| Stamp duty exempt (0.8%) | ~€2,500 |
| IRS Jovem 2nd year (75% exemption up to 22 IAS) | ~€2,800/year · ~€17,000 over 7 cumulative years |
| State guarantee (enables 95-100% LTV) | Allows purchase without a €30,000-40,000 deposit |
| Class A (reduced energy vs Class B/C) | ~€50/month saving = €12,000 over 20 years |
| Total impact young buyer | ~€50,000+ in cumulative benefits |
For the full scenario with monthly instalment simulation and payment schedule, see modular house financing.
Step-by-step: how to apply for each benefit
- Before signing the CPCV: check the age of both spouses, confirm first home, calculate borrowing capacity with a bank simulation.
- Bank pre-approval: request pre-approval with explicit mention of the young state guarantee (not all banks offer it — major ones: CGD, Novo Banco, BPI, Santander).
- Signing the promissory contract (CPCV) with safeguard clauses: conditional on mortgage approval.
- At the notary, at the deed: explicitly declare "first own permanent residence" and "young regime" to activate the IMT exemption at settlement.
- After the deed: change your fiscal address with the Tax Authority within 60 days (evidences permanent residence). Register the property at the Land Registry.
- Annual IRS return: declare "IRS Jovem" automatically in the appropriate box (Annex A or B). Housing cost invoices registered via e-fatura.
- Post-6-year monitoring: keep own permanent residence for 6 consecutive years. Early change triggers proportional repayment of the exempt IMT.
Modular or traditional: which is more advantageous for a young buyer?
A turnkey Passive House modular home offers 3 specific advantages for a young buyer vs traditional build:
- Timeline: 6-9 months vs 14-24 months. Young buyers with approved credit face occupancy pressure; a shorter timeline reduces bridging interest and stress.
- Fixed price: zero overruns. A young buyer's budget is typically tight and tolerates little risk.
- Guaranteed Class A: reduced energy bill (~€50/month vs a Class C apartment) frees up capacity for the instalment.
For a detailed comparison with a conventional apartment, see modular house vs apartment in Portugal.
Figures and procedures indicative for the Portuguese market. Each project is assessed individually according to specific conditions.
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