Portugal Capital Gains Tax on Primary Residence Sale 2026: How It Works

What counts as a capital gain on Portuguese property

A real-estate capital gain is the profit from selling a property: the difference between the sale price and the acquisition value. In Portugal, real-estate capital gains for individuals are taxed under Article 10 of the Personal Income Tax Code (CIRS) ^[1]. The applicable regime depends on three variables: whether the property was the seller's primary residence (HPP — Habitação Própria e Permanente), whether the seller reinvests in another primary residence, and whether the seller is a Portuguese tax resident.

This guide focuses on the most common case: sale of a primary residence by a tax resident. That is where planning options are richest and mistakes cost the most. Sale of a secondary property, land or rental property follows a different regime, simpler but generally more punitive.

Calculating the capital gain

The formula is straightforward, but the value sits in the deductions:

• Gross gain = Sale price − (Acquisition value × Monetary devaluation coefficient)
• Taxable gain = Gross gain − Documented expenses
• Effective tax = 50 % of the taxable gain aggregated with the year's other income (residents)

The monetary devaluation coefficient is published annually in an Ordinance and updates the acquisition value for accumulated inflation ^[2]. Bought in 2010 for €150,000? The 2010→2026 coefficient may be ~1.25, giving a corrected acquisition value of €187,500. Many sellers forget this correction and lose thousands of euros in IRS.

Deductible expenses: what counts

• IMT and Stamp Duty paid on the original acquisition (always deductible).
• Notary and land registry fees from the acquisition.
• Real-estate agent commission paid on acquisition (if any).
• Refurbishment work done during ownership. Requires an invoice in the owner's name, with NIF, referencing the property (address or tax article number).
• Energy certificate, technical inspections and mandatory reports for the sale.
• Real-estate agent commission paid on sale (deductible if documented by invoice).

What does NOT count: ordinary maintenance (paint, small fixes), mortgage interest, condominium fees, annual IMI property tax, personal expenses. The critical test is "improvement work", not "household spend".

Mandatory 50 % aggregation (residents)

For Portuguese tax residents, 50 % of the taxable gain is aggregated with the year's other income. The effective tax depends on the IRS marginal rate applied to the bracket the gain places the household in. IRS brackets and rates are published annually in the State Budget and shift year on year. A gain realised in a lower-income year pays less IRS. In higher brackets (marginal rate 48 %, or 53 % with surcharge) the effective rate on the capital gain is ~24 %-26.5 %.

Aggregation became mandatory in 2023. Previously the taxpayer could opt for autonomous taxation at 28 %, an option still available only for non-residents. For residents, planning means understanding which year to realise the gain (selling in a lower-income year can reduce the applicable marginal rate).

Exemption by reinvestment in a new primary residence

This is the most relevant option when selling a primary residence. If the sale proceeds (net of any mortgage paid off) are reinvested in another primary residence, in Portugal or in the EU/EEA, within the defined window, the gain may be partially or fully excluded from tax.

Requirements for the exemption

1. The sold property must have been the seller's primary residence (HPP) and lived in as such for at least 12 months before the sale (rule introduced in 2024).
2. The new property must be acquired as primary residence in Portugal or in an EU/EEA country.
3. The time window is 36 months after the sale OR 24 months before the sale.
4. Reinvestment is measured on the realisation value net of mortgage paid off (not on the gain).
5. If only part of the value is reinvested, the exemption is proportional.

Example: you sell HPP for €350,000 with €100,000 mortgage paid off at sale. Net amount to reinvest: €250,000. If you buy a new HPP for €200,000, you reinvest 80 % (200/250). So 80 % of the gain is exempt, 20 % is taxed.

Extraordinary measure (Law 56/2023): ENDED

Law 56/2023 (Mais Habitação) created an extraordinary measure allowing the gain from a non-HPP sale to be used to amortise an existing HPP mortgage, with total exemption ^[3]. This measure ended on 31 December 2024 and is no longer available in 2026. Advice still mentioning this option is outdated. Always check the date of the source.

Alternative for sellers aged 65+ or retired: reinvestment in retirement-savings products

A second, less-known exemption route exists under the same article 10.º of the IRS Code, paragraphs 7 and 9. Sellers aged 65 or above at the time of sale, or those already retired (including foreigners with Portuguese tax residence), can reinvest the proceeds from their primary-residence sale into a retirement-savings product with a guaranteed life annuity, instead of buying another property, and have the capital gain exempt in proportion to the amount reinvested ^[1].

Eligible products include Portuguese PPR (Plano Poupança-Reforma) contracts with a life-annuity clause, life-annuity insurance policies issued by insurers authorised in Portugal, and the public capitalisation scheme (CGA, individual-membership track). The reinvestment window is tighter than the new-HPP route: only 6 months from the sale. And the income generated by the reinvested capital must be regular and last at least 10 years for the exemption to hold. Early redemption or interruption triggers retroactive taxation by the tax authority.

Example. Maria, 68, widowed, sells her Lisbon flat (lived in for 30 years) for €300,000. She doesn't plan to buy another: she wants to move closer to her daughter in Coimbra and rent. Taxable gain: €120,000. Instead of buying a new HPP she reinvests €200,000 in a PPR with a 25-year life-annuity contract (estimated €700 monthly income). Proportional exemption: 200,000 / 220,000 (net sale value) ≈ 91 % → €109,000 exempt, €11,000 taxed. With the 50 % inclusion rule, €5,500 enters her 2026 IRS. Estimated additional IRS: under €1,500. And she keeps a guaranteed monthly income.

Three worked examples

Two resident cases side by side for direct comparison. Case 3 (non-resident regime) follows separately, since the regulatory framing differs.

Case 1, in detail. Couple bought HPP in 2015 for €180,000. Spent €30,000 on documented refurbishment. Sells in 2026 for €320,000. Devaluation coefficient 2015→2026 ≈ 1.15 → corrected acquisition value €207,000. Gross gain €113,000. Deductible expenses (refurb + acquisition IMT/IS + sale commissions) €40,000. Taxable €73,000. Reinvests €280,000 (after paying off €40,000 mortgage) in a new HPP for €260,000: 100 % of net value. Full exemption.

Case 2, in detail. Sells HPP for €350,000 with €100,000 mortgage paid off at sale. Net €250,000. Taxable gain €60,000. Reinvests €180,000 in a new HPP (72 % of net, 180/250). 72 % of €60,000 = €43,200 exempt; €16,800 taxed; 50 % aggregation = €8,400 enters IRS. At 35 % marginal rate, additional IRS ≈ €2,940.

Case 3: non-resident sells historic Portuguese HPP

Since 2023, following the ECJ ruling, non-residents are now taxed on Portuguese real-estate capital gains under the same regime as residents: 50 % aggregation, with the possibility of reinvestment exemption in an EU/EEA primary residence ^[4]. The previous regime (autonomous taxation at 28 % on 100 % of the gain) may still be an option in some cases but is no longer the default. Sellers planning to return to Portugal and shift tax residency after the sale should assess the IFICI tax regime (the NHR successor): NHR closed in 2024 and IFICI is a narrower regime. Consult an accountant familiar with non-residents before filing.

When and how to file

The gain is reported on Form 3 of the IRS for the year the sale occurred, in Annex G (capital gains and other patrimonial increases). Deadline: April to June of the following year. For residents, it joins the rest of the household's income. For non-residents, it can be filed via simplified Form 3 or through fiscal representation.

1. After the sale, gather invoices and proof of deductible expenses.
2. Calculate the applicable devaluation coefficient (Ordinance for the filing year).
3. In April-June of the following year, complete Annex G of Form 3.
4. Indicate intention to reinvest (if applicable). Use the specific field in Annex G.
5. Follow the AT's declaration and, if you reinvested, report the application in the year you purchase the new HPP.
6. Keep documents for 4 years (inspection window).

Common mistakes that cost money

1. Not applying the devaluation coefficient to the acquisition value. You end up paying tax on accumulated inflation instead of real gain.
2. Forgetting deductible expenses (old refurbishment invoices) due to disorganised records.
3. Reinvesting in a secondary home or holiday property thinking it counts as HPP. Only primary residence qualifies.
4. Missing the 36-month reinvestment deadline (no extensions possible).
5. Not reporting the sale in Annex G of Form 3 when the tax authority cross-references with the land registry.
6. Applying the extraordinary Law 56/2023 measure (mortgage amortisation). It ended in 2024.
7. For non-residents: filing under the old regime (autonomous 28 %) without realising you may pay less under the post-ECJ equalised regime.

Before signing: three steps to lower your tax

Before signing the promissory contract, do three things: (1) gather acquisition and refurbishment documents to calculate deductible expenses; (2) decide whether you will reinvest and in what realistic timeframe (buying a new HPP takes time to close); (3) consult an accountant for a tax simulation. The paid hour always pays off. For the buyer-side tax impact, complement with the IMT and Stamp Duty guide for 2026.

This article was written with AI assistance and reviewed editorially by The Agent Trust. All cited sources are official and verifiable in the links above.