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Portuguese IMI + AIMI simulator

Every rule that actually changes your bill: municipal rate, dependents reduction, interior-de-baixa-densidade, reabilitação exemption, 65+ low-income exemption, first-year HPP, AIMI on high-value portfolios. Every output line links to the specific CIMI / EBF article.

PROPERTY
OWNERSHIP + RESIDENCE
HOUSEHOLD + PORTFOLIO
SPECIAL CONDITIONS
TOTAL DUE€600.00per year (2026)Rate applied: 0.3% (from Finkavo's 2026 municipal rate table)
Base IMI (rate × VPT × ownership)€600.00
EBF Art 44 (interior de baixa densidade)—
Not eligible — your município is not on the interior-de-baixa-densidade list.
Net IMI after deductions€600.00
Portfolio VPT €200 000 is at or below the €600 000 deduction — no AIMI due.
Combined annual total€600.00
PAYMENT SCHEDULE (3 installment(s))
May 31€200.00
August 31€200.00
November 30€200.00
Per CIMI Art 120: ≤€100 single May payment · €100.01–€500 two payments (May + Nov) · >€500 three payments (May + Aug + Nov).
Next stepsIf your VPT feels wrong, you can request a reassessment (avaliação) every 3 years at Portal das Finanças.Cross-check the exact rate against your last IMI notice — municipalities can amend the rate each October for the following year.

Planning estimate. Municipal rates verified as of 2025-10 — check your latest IMI notice for the exact figure. Dependents-linked reduction and interior-de-baixa-densidade discount are município-elective. Not tax advice.

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Frequently asked questions

How is IMI calculated?

IMI = municipal rate × VPT × ownership share. The rate is set annually by each município in October for the following year, within the CIMI Art 112 statutory range: 0.30%-0.45% for urban property, fixed 0.8% for rural. Reductions and exemptions come from CIMI and EBF.

What is VPT and where do I find it?

VPT (Valor Patrimonial Tributário) is the tax-registered value of the property — not the market value. It's on your caderneta predial (property record). If you don't have it, request it online at Portal das Finanças: Serviços > Consultar > Caderneta Predial.

What is AIMI and when does it apply?

AIMI (Adicional ao IMI, CIMI Art 135-A–K) is a wealth-tax overlay on total property portfolio value above €600,000 for individual taxpayers (€1.2M for married filing jointly). Marginal bands: 0.7% up to €1M, 1.0% between €1M and €2M, 1.5% above €2M. Applies to residents and non-residents alike on their Portuguese property.

I have 3 kids in Lisbon — do I get an IMI reduction?

CIMI Art 112-A lets municípios elect to give €20-€70 off IMI for households with 1-3+ dependents on their HPP. Most large municípios opt in (Lisboa, Porto, Cascais, Braga do) but not universally. Check your last IMI notice — if the reduction was applied, it'll show as 'dedução dependentes'. This calc assumes best-case (reduction applied).

I just bought my first home — do I skip IMI?

EBF Art 46 nº 1 gives a 3-year IMI exemption on your first-year HPP acquisition IF the VPT is ≤ €125,000. Above that, no exemption. You need to file the exemption request at Portal das Finanças within 60 days of the deed.

What's the interior-de-baixa-densidade reduction?

EBF Art 44 lets municípios classified as 'interior de baixa densidade' (per Portaria 208/2017 — roughly 165 concelhos in the interior, Alentejo, Trás-os-Montes, Beiras) reduce IMI by up to 30% for HPP owners. Bragança, Guarda, Castelo Branco, Beja, Portalegre, Évora rural areas are examples.

Can I appeal my VPT?

Yes. Under CIMI Art 130, you can request a VPT reassessment (avaliação) once every 3 years. If your VPT was set decades ago on an outdated coefficient, it's likely worth requesting. File at Portal das Finanças > Serviços > Imóveis > Pedir Avaliação.

When do I pay?

CIMI Art 120: if your combined IMI + AIMI is ≤ €100, a single payment on May 31. Between €100.01 and €500, two payments (May 31 + Nov 30). Above €500, three payments (May 31 + Aug 31 + Nov 30). The AT sends you the nota de cobrança in April.