Selling property in Portugal almost always raises the same question: how much mais-valias (capital gains) tax will I owe? The honest answer is that Portugal taxes real estate gains fairly consistently — but the law also carves out several genuine exemptions and reductions. Knowing which one applies to your situation, before you sign a promissory contract, can be the difference between a painless sale and an unpleasant surprise on your IRS return the following spring.
This article walks through the main legal routes to reducing or eliminating capital gains tax on a Portuguese property sale in 2026, and — just as importantly — the details that most often disqualify people who assumed they were covered.
This is general information, not tax advice. Portuguese tax rules are detailed and case-specific, and 2026 has already brought one significant change (see below). Always confirm your specific case with a Portuguese accountant (contabilista certificado) before selling.
The basic mechanic: for residents, only 50% of the gain is added to your other taxable income, then taxed at your personal marginal IRS rate — which for 2026 runs from about 13% on the lowest bracket up to 48% on income above roughly €81,000.
A worked example: say you bought an apartment in 2018 for €220,000, sell it in 2026 for €380,000, and it wasn’t your primary residence (no exemption available). After adjusting the purchase price for inflation and deducting eligible costs, assume the taxable gain works out to around €140,000. Only 50%, or €70,000, gets added to your taxable income for the year. If that pushes your total income into the higher brackets, that €70,000 slice could easily be taxed at 35–48%, meaning roughly €25,000–€33,000 in tax on the sale itself — versus paying nothing if it had qualified for the primary-residence reinvestment exemption.
Non-residents: the old flat 28% rate on the full gain was abolished in 2023. Non-residents are now taxed the same way as residents — 50% of the gain added to income, taxed at the marginal rate — but must also declare worldwide income to determine which bracket applies.
Since the exact euro amount taxed depends heavily on your personal bracket and the specific deductible costs, this is very much a “get the real number from an accountant before you sign” situation rather than something a rule of thumb can safely replace.
This is the classic and most commonly used exemption, set out in Article 10(5) of the CIRS (Portuguese Personal Income Tax Code).
If you sell your habitação própria e permanente — your primary, registered residence — and reinvest the proceeds into another primary residence, the gain can be excluded from tax, in full or in part depending on how much you reinvest.
The conditions that actually matter in practice:
A 2026 tax tribunal ruling is a useful reminder of how strictly the tax authority applies the residency test: a taxpayer who moved into a property before formally acquiring it (it was later inherited/transferred) was denied the exemption because the home wasn’t legally “hers” during the residency period, despite actually living there. There is a narrow safeguard clause for unforeseeable life events (marriage, divorce, a new child) that can excuse an early sale, but the tax authority requires these to be genuinely unpredictable — not a matter of convenience.
If you don’t qualify for a full exemption, don’t assume the whole gain is taxable. Under Article 43(2) of the CIRS, Portuguese tax residents only have 50% of the capital gain added to their taxable income, where it’s then taxed at their marginal IRS rate alongside their other income. This applies regardless of whether the property was a second home, an inherited property, or a rental — it’s a standing rule, not a special favour.
Non-residents were historically taxed on 100% of the gain at a flat rate, though EU case law has pushed Portugal toward aligning non-resident treatment more closely with resident treatment in recent years. If you’re not tax-resident in Portugal, this is one area where a quick check with an accountant before selling is worth the fee.
If you acquired the property before 1 January 1989 — before capital gains tax on real estate existed in Portugal in its current form — any gain on its sale is excluded from taxation entirely. This is reported on Annex G1 of the IRS return rather than the standard Annex G. It’s a genuinely simple exemption, but it only applies to properties with unbroken pre-1989 ownership; a property inherited or re-registered after that date does not qualify just because the original construction or first purchase predates it.
Homeowners who are 65 or older, or already retired, have an alternative to buying another house. If they reinvest the sale proceeds into an eligible financial product — certain retirement or insurance-type savings products designated for this purpose — within 6 months of the sale, the gain can also be excluded from tax. This gives older sellers, including many who are downsizing or moving into assisted living, a route to the exemption without having to commit to another property purchase.
The most significant recent development is a new housing tax package published on 20 May 2026. For the first time, it becomes possible to sell a property at a profit and avoid capital gains tax by reinvesting the proceeds into property intended for residential rental — not just another primary residence.
Key features, based on the measures as published:
Because this measure is brand new, the detailed implementing rules (thresholds, required documentation, exact rent ceilings) are still being clarified through the year. Anyone considering this route in 2026 should treat it as a promising but still-developing option, and get written confirmation of the specifics from an accountant before relying on it.
Because the primary-residence exemption is the one most sellers rely on, it’s worth being explicit about how it’s most often lost in practice:
| Situation | Legal basis | Core condition |
|---|---|---|
| Sell main home, buy another main home | Art. 10(5) CIRS | 12-month prior residency; reinvest sale value net of mortgage within 24 months before / 36 months after |
| No exemption applies | Art. 43(2) CIRS | Only 50% of the gain is taxable for residents |
| Property bought before 1 Jan 1989 | Annex G1 | No tax on the gain at all |
| Seller aged 65+ or retired | Art. 10 CIRS | Reinvest in eligible financial products within 6 months |
| Reinvest in buy-to-let housing | 2026 housing package (in force since 20 May 2026) | Moderate-rent residential rental property in Portugal; details still being finalised |
Portugal’s capital gains rules on property are more forgiving than many sellers expect — but the exemptions reward people who plan the sale in advance, keep proper documentation, and file the right forms at the right time. The 2026 buy-to-let reinvestment option in particular could open up meaningful savings for anyone building a rental portfolio, but it’s new enough that it deserves professional confirmation before you count on it.
If you’re planning a sale and want to understand which of these routes genuinely applies to your situation, our team at Pearls of Portugal can help you think through the timing and connect you with qualified Portuguese tax professionals for the specifics.
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