Framework for Property Capital Gains in IRS

Property capital gain corresponds to the profit obtained from the sale (or other onerous transfer) of a property for a value higher than its acquisition cost. In tax terms, this gain is classified as Category G income (Capital Gains) under the Personal Income Tax Code (CIRS), as stipulated in Articles 9 and 10.

The taxation of property capital gains is a complex topic, with significant specificities depending on the seller's tax residency, the type of property (primary residence, secondary, for rental), and the intention to reinvest. It is crucial to understand the calculation mechanisms and the exemption or mitigation options to optimise the tax burden.

Which operations generate taxable capital gains?

Taxable capital gains are those obtained from:

• Onerous transfer of real rights over real estate: This is the most common situation, encompassing the sale of land, apartments, houses, shops, offices, among others. The concept covers not only full ownership but also usufruct or surface rights.
• Permanent allocation of private assets to business or professional activity: When a property belonging to an individual's personal assets is transferred to their business assets to be used in their professional activity.
• Onerous assignment of contractual positions or other rights inherent to contracts relating to real estate: This includes, for example, the transfer of a promise of sale before the definitive deed, where the prospective buyer obtains a gain.
• Property exchange: Although it does not directly involve money, property exchange can generate capital gains if the value of the property received is higher than the acquisition value of the property given.

Situations of non-taxation

Not all property transfers generate taxable capital gains. There are important exceptions to consider:

• Donations: Property donations, whether between spouses, ascendants and descendants, or to other individuals, do not generate capital gains for the donor. However, the donee who later sells the property will consider the taxable asset value (VPT) at the date of the donation as the acquisition value.
• Inheritances and Successions: The transfer of property by death (inheritance or succession) is not subject to IRS for capital gains. Heirs who subsequently sell the property will consider the VPT at the date of the opening of the succession (date of death) as the acquisition value.
• Division of common assets due to divorce or judicial separation of persons and property: The division of common marital property resulting from a divorce or judicial separation does not generate taxable capital gains. However, if there are equalisation payments (financial compensation), the party receiving them may have taxable capital gains on the share of the ex-spouse attributed to them, according to the interpretation of the Tax Authority.
• Expropriations for public utility: Although it is an onerous transfer, compensation for expropriation follows its own tax regime, generally not being taxed for IRS capital gains, unless the compensation value is higher than the market value of the expropriated property.

Calculation of Taxable Capital Gain: The Essential Formula

The calculation of taxable capital gain is the starting point for determining the tax due. The basic formula is as follows, according to Article 10 of the CIRS:

Capital Gain = Realisation Value − (Acquisition Value × Monetary Depreciation Coefficient) − Acquisition Costs − Disposal Costs − Property Improvement Costs

Formula Components: Details and Considerations

• Realisation Value (Sale Value): Corresponds to the value stated in the purchase and sale deed. It is important to note that this value does not include the Municipal Tax on Onerous Property Transfers (IMT) paid by the buyer, nor any other expenses borne by the buyer. In the case of exchange, the realisation value is the VPT of the property received.
• Acquisition Value:
  • For properties acquired by purchase and sale, it is the value stated in the respective deed.
  • For properties acquired by donation or inheritance, the acquisition value to be considered is the Taxable Asset Value (VPT) of the property that was in force at the date of the donation or the opening of the succession (date of death).
  • If the property was acquired before 1 January 1989, the capital gain may be exempt from IRS taxation. This is an important exception to consider.
• Monetary Depreciation Coefficient: This coefficient aims to update the acquisition value for accumulated inflation, minimising the tax impact of nominal gains. It is published annually by Ordinance of the Ministry of Finance and applies only if the property has been held for more than 24 months. If the property is sold before 24 months have passed since its acquisition, the acquisition value is not updated, which tends to increase the taxable capital gain.
• Acquisition Costs: These are all expenses demonstrably incurred to acquire the property. They include:
  • IMT (Municipal Tax on Onerous Property Transfers) paid on purchase.
  • Stamp Duty (0.8% on the purchase value).
  • Deed and registration costs (notary, land registry).
  • Commission paid to the real estate agency (if applicable, on purchase).
  • Lawyers' or solicitors' fees related to the acquisition.
• Disposal Costs (Sale): Expenses directly related to the sale of the property. They include:
  • Energy Certificate (mandatory for sale).
  • Commission paid to the real estate agency (the most common, typically 5% + VAT).
  • Lawyers' or solicitors' fees related to the sale.
  • Other essential expenses for the completion of the sale.
• Property Improvement Costs (Qualifying Works): These are expenses for improvement and valorisation works on the property, carried out in the last 12 years before the sale, provided they are duly proven by invoice with the owner's NIF. This does not include routine maintenance or repair expenses. Examples: kitchen or bathroom renovation, roof replacement, central heating installation. It is fundamental that these works increase the value of the property and do not merely maintain it.

Monetary Depreciation Coefficients: A Detailed Analysis

Monetary depreciation coefficients are a crucial element in calculating capital gains, as they allow for the correction of the property's acquisition value based on inflation. This correction is essential to prevent the taxpayer from being taxed on a merely nominal gain, resulting from the loss of purchasing power of the currency over time. The Ordinance approving them is published annually, usually at the end of the civil year, with effects for sales made in the following year.

For the year 2026, the coefficients will be published in an Ordinance of the Ministry of Finance, presumably at the end of 2025. Below, we present an estimate based on historical trends, which serves only as a reference and should be confirmed with the official Ordinance in the year of sale:

Important: The non-application of the coefficient to properties held for less than 24 months means that the acquisition value is not updated, which can result in a significantly higher capital gain and, consequently, a higher tax. This rule aims to discourage short-term property speculation.

The official source for consulting the coefficients is the Portal das Finanças, generally available in the section for filling out IRS Form 3, Annex G, or by searching for Ordinances in tax legislation.

Taxation Regimes: Residents vs. Non-Residents

The taxation of property capital gains in Portugal differs significantly depending on whether the seller is considered a tax resident in Portugal or a non-resident.

Tax Residents in Portugal

For tax residents, the taxation of property capital gains follows the aggregation regime, but with an important particularity:

• Taxable Base: Only 50% of the calculated capital gain is considered for taxation purposes. The remaining 50% is exempt from IRS.
• Taxation: The 50% of the capital gain is aggregated with the taxpayer's other income (salaries, rents, etc.) and subject to progressive IRS rates, which currently vary between 13.25% and 48%, depending on the income bracket.
• Practical Example: If a resident obtains a capital gain of €100,000, only €50,000 will be added to their global income. If their marginal IRS bracket is 35%, the effective tax on the capital gain will be 35% * 50% = 17.5% (€17,500).
• Reinvestment in Primary Residence (HPP): Residents can benefit from exemptions for reinvestment in a Primary Residence (HPP) or in PPR/Life Insurance (for those over 65), as detailed in the following sections.

Non-Tax Residents in Portugal

The regime for non-residents has undergone changes, and it is crucial to be aware of the latest legislation:

• Taxable Base and Taxation (General Regime): Traditionally, non-residents were taxed on 100% of the capital gain, at a flat and final rate of 28%. This meant that, regardless of their global income, the capital gain was fully taxed at this rate.
• Option for Taxation as a Resident (New for 2024): Following decisions by the Court of Justice of the European Union, which considered the full taxation for non-residents from the EU/EEA discriminatory, Portuguese legislation was amended. Since 2024, non-residents, regardless of their nationality, can opt to be taxed as residents. This means they can choose to aggregate 50% of the capital gain with their income, with this portion being subject to progressive IRS rates. This option is advantageous for non-residents with low global income, as they can benefit from effective tax rates lower than 28%.
• Reinvestment in HPP and 65+ Regime: Non-residents generally cannot benefit from exemptions for reinvestment in HPP, as the concept of HPP applies to those who are tax resident in Portugal. Similarly, the regime for reinvestment in PPR/Life Insurance for those over 65 is also not applicable to them.
• Double Taxation Treaties (DTT): Portugal has DTTs with several countries. These treaties establish rules to prevent income from being doubly taxed (in Portugal and in the seller's country of residence). Generally, DTTs grant the right to tax income from real estate to the State where the property is located (Portugal), but they may provide for tax credit or exemption mechanisms in the country of residence to mitigate double taxation. It is essential to consult the applicable DTT in each specific case.

The choice between the 28% flat rate and the aggregation option for non-residents should be carefully evaluated. For low global incomes, aggregation (with 50% of the capital gain taxed at progressive rates) may result in a tax lower than 28%. For high incomes, the flat rate may be more advantageous.

Exemption and Reinvestment Strategies

Portugal offers important mechanisms for exemption or mitigation of capital gains taxation, especially for the sale of a primary residence.

Reinvestment in Primary Residence (HPP)

This is the most common and impactful exemption, allowing the capital gain obtained from the sale of an HPP to be totally or partially exempt from IRS, provided that the realisation value is reinvested in another HPP. The cumulative requirements (Article 10, no. 5 of CIRS) are:

1. Property Sold as HPP: The alienated property must have been the primary residence of the household, proven by its registration as the taxpayer's tax address in the 24 months prior to the sale.
2. Reinvestment of the Realisation Value: The realisation value (sale value minus any mortgage amortisation) must be reinvested in the acquisition of a new HPP.
3. Location of the New HPP: The new HPP can be located in Portugal, another Member State of the European Union, or a State of the European Economic Area (EEA) with which Portugal has a tax information exchange agreement.
4. Reinvestment Period: Reinvestment must occur within one of the following periods:
   • Within 36 months following the date of sale of the property.
   • Within 24 months prior to the date of sale of the property.
5. Allocation to HPP: The new HPP must be allocated to the taxpayer's or their household's primary residence within 12 months after its acquisition or construction.
6. Communication in the IRS Declaration: The intention to reinvest must be communicated in Annex G of IRS Form 3 for the year in which the sale occurred.

Calculation of Exemption: The exemption is proportional to the reinvested amount. If the total realisation value is reinvested, the exemption is total. If only a part is reinvested, the exemption is partial, calculated by the percentage of the reinvested amount over the realisation value.

Numerical Example: A taxpayer sold their HPP for €300,000. They had a mortgage of €100,000 which was amortised with the sale value. The realisation value for reinvestment purposes is €200,000 (€300,000 - €100,000). The calculated capital gain was €80,000.

• If they reinvest €200,000 in the purchase of a new HPP, the capital gain of €80,000 is fully exempt.
• If they reinvest only €150,000, the exemption will be 75% (€150,000 / €200,000). Thus, 75% of €80,000 (€60,000) is exempt, and the remaining 25% (€20,000) is taxed.

Regime for Taxpayers Aged 65 or Over: Reinvestment in PPR or Life Insurance

Introduced by Law no. 31-A/2023, this regime offers an alternative exemption for older taxpayers (Article 10, no. 6 of CIRS):

• Who can benefit: Taxpayers who, at the date of sale of the HPP, are 65 years of age or older, or are in retirement.
• Type of Reinvestment: The realisation value (or part of it) must be reinvested in life insurance contracts, individual or collective adherence to an open pension fund, or PPR (Pension Savings Plan).
• Deadline: Reinvestment must be made within 6 months after the date of sale of the property.
• Limits: There is an annual exemption limit of €11,000 per taxpayer, or €22,000 for a couple selling a co-owned HPP. The capital invested in these products must be paid in periodic instalments, with a maximum monthly amount of €500.
• Utility: This regime is particularly useful for taxpayers who wish to reduce their real estate assets (downsizing), sell their HPP to rent a smaller house, or move closer to family, without the capital gain being taxed. It allows them to convert real estate capital into complementary retirement income.

Practical Cases of Property Capital Gains Taxation

Case 1 — Sale of Primary Residence (HPP) with Full Reinvestment

A taxpayer sold their Primary Residence (HPP) in 2026. The transaction data are:

• Acquisition: Property acquired in 2015 for €180,000. Acquisition costs (IMT, Stamp Duty, deed) totalled €5,000.
• Improvement Works: Works carried out in 2020 for €15,000 (with invoice and NIF).
• Sale: Sale value in 2026 was €350,000. Real estate commission and energy certificate cost €17,500.
• Reinvestment: The taxpayer intends to reinvest €332,500 in the purchase of a new HPP within 36 months following the sale.

Capital Gain Calculation:

1. Corrected Acquisition Value:
   • Acquisition value: €180,000
   • Monetary depreciation coefficient (2026 estimate for 2015): 1.18
   • Corrected acquisition value: €180,000 * 1.18 = €212,400
2. Deductible Costs:
   • Acquisition costs: €5,000
   • Sale costs: €17,500
   • Qualifying works: €15,000
3. Gross Capital Gain:
   • €350,000 (Sale) - €212,400 (Corrected Acquisition) - €5,000 (Acquisition Costs) - €17,500 (Sale Costs) - €15,000 (Works) = €100,100
4. Realisation Value for Reinvestment: It is assumed that there was no mortgage or that it was fully amortised and the remainder (€350,000) is the value available for reinvestment. However, for exemption purposes, what matters is the reinvested amount.
5. Application of HPP Reinvestment Exemption:
   • Calculated capital gain: €100,100
   • Reinvested value: €332,500
   • As the reinvested value is equal to or greater than the realisation value (€350,000), the exemption is total.
   • Additional IRS Due: €0

This example demonstrates the importance of reinvestment in HPP to eliminate capital gains taxation.

Case 2 — Sale of Second Home by Tax Resident

Let's consider the same capital gain calculation data from Case 1, but for the sale of a second home (not HPP) by a tax resident in Portugal.

• Gross Capital Gain Calculated: €100,100 (as per previous calculation).
• Taxable Base for Resident (50%): €100,100 * 50% = €50,050.
• Taxation: This base is aggregated with the taxpayer's other income. Let's assume the taxpayer has an annual income of €60,000 (salary) and is in the 37% marginal bracket.
• Additional IRS Due: €50,050 * 37% = €18,518.50.

In this case, the reinvestment exemption does not apply, and the capital gain contributes significantly to the final tax.

Case 3 — Sale of Property by Non-Tax Resident

Let's again use the calculated capital gain of €100,100, but now for a non-resident seller in Portugal.

1. Option 1: General Regime (Flat Rate):
   • Taxable Base: 100% of capital gain = €100,100.
   • Flat Rate: 28%.
   • Additional IRS Due: €100,100 * 28% = €28,028.
2. Option 2: Taxation as Resident (Aggregation):
   • Taxable Base: 50% of capital gain = €50,050.
   • Taxation: Subject to progressive IRS rates. If the non-resident has a low annual global income (for example, only this capital gain), the tax may be lower.
     • Example: If the €50,050 falls entirely into the 23% bracket (after deductions), the tax would be €50,050 * 23% = €11,511.50.
     • Example: If the non-resident's global income (including 50% of the capital gain) placed them in a 37% bracket, the tax would be €50,050 * 37% = €18,518.50.

In this case, the option for taxation as a resident would be clearly more advantageous for the non-resident with low income, resulting in a much lower tax than the €28,028 under the flat rate regime. It is crucial for the non-resident to perform this simulation before submitting the IRS declaration.

Filling out Annex G of IRS Form 3

Annex G is the specific form of IRS Form 3 where capital gains and losses are declared. Its correct completion is fundamental to ensure the application of exemptions and to avoid penalties.

Deadlines:

• Filing the Declaration: Annex G must be submitted together with IRS Form 3, annually, between 1 April and 30 June of the year following the sale of the property.
• Payment of IRS: The tax calculated on capital gains must be paid by 31 August of the year the declaration is filed.

Common Errors to Avoid in Declaring Property Capital Gains

The complexity of capital gains rules often leads to errors that can result in penalties or a higher tax payment than due. It is crucial to pay attention to the following:

1. Omission or Underestimation of Deductible Expenses: Many taxpayers forget to include all deductible expenses, such as real estate commission, energy certificate, IMT and Stamp Duty paid on acquisition, or deed and registration costs. These expenses reduce the capital gain and, consequently, the tax. It is essential to keep all invoices and proofs.
2. Works Without Invoice or With Incorrect Invoicing: Improvement works are only deductible if there is an invoice with the owner's NIF and if they are carried out within 12 years prior to the sale. Invoices without NIF, in the name of third parties, or for routine maintenance works (not improvement) are not accepted. This is a very common error that prevents the deduction of significant costs.
3. Failure to Communicate the Intention to Reinvest in HPP: Even if the reinvestment has not been realised at the time of filing the IRS declaration (for example, if the sale occurred in April and the declaration is filed in June, but the 36-month period has not yet ended), it is mandatory to indicate the intention in Section 7 of Annex G. Omission of this communication nullifies the right to exemption, even if the reinvestment occurs within the legal period.
4. Non-Resident Opting for Aggregation Without Simulation: Since 2024, non-residents can opt to be taxed as residents. However, this option is not always advantageous. If the non-resident's global income is high, the 28% rate on 100% of the capital gain may be lower than the progressive rate resulting from the aggregation of 50% of the capital gain. Simulation is essential.
5. Confusing HPP with Second Home or Rental Property: The reinvestment exemption applies exclusively to the Primary Residence, which must be the taxpayer's tax address. Holiday homes, weekend homes, or properties used for Local Accommodation or rental do not qualify for this exemption.
6. Ignoring the Monetary Depreciation Coefficient: For properties acquired many years ago (more than 24 months), the application of the monetary depreciation coefficient can significantly reduce the taxable capital gain. Not using it, when applicable, results in an unduly high tax.
7. Lack of Knowledge of Taxation in Divorce Settlements with Equalisation Payments: Although the division of assets due to divorce does not generate capital gains, if one of the ex-spouses receives equalisation payments (financial compensation) for their share in the property, the portion of the other ex-spouse that is acquired through these payments may be subject to capital gains. This is an area with complex interpretations that frequently leads to errors.
8. Failure to Declare Capital Gains from Properties Acquired Before 1989: Properties acquired before 1 January 1989 are exempt from capital gains taxation. However, they must be declared in Annex G (Section 5), indicating the reason for the exemption, so that the Tax Authority is aware of the transaction. Omission can lead to doubts and requests for clarification.

Conclusion and Final Recommendations

The taxation of property capital gains in Portugal is a complex tax area, with specificities for residents and non-residents, and important exemption mechanisms that, if well used, can mean considerable tax savings. The key to efficient tax management lies in information, planning, and correct communication with the Tax Authority.

Practical Recommendations:

1. Rigorous Documentation: Keep all documents related to the acquisition and sale of the property: deeds, proofs of IMT and Stamp Duty, invoices for real estate commissions, energy certificates, and especially invoices for improvement works with your NIF. This documentation is essential to prove deductible expenses.
2. Advance Planning: If you are considering selling a property, especially your HPP, plan in advance. Evaluate reinvestment deadlines, values involved, and potential exemptions. For those over 65, consider reinvestment options in PPR/life insurance.
3. Tax Simulations: Before making decisions, perform IRS simulations to determine the tax impact of the sale. For non-residents, it is essential to simulate the option for taxation as a resident to verify which regime is most advantageous.
4. Professional Consultation: Given the complexity of the legislation, consulting a certified accountant or a tax specialist is highly recommended. A professional can help identify all applicable deductions, ensure compliance with deadlines, and optimise your tax situation, avoiding costly errors.

Understanding the nuances of property capital gains is a fundamental step for any property owner in Portugal. Do not delay your preparation and always seek specialised advice to ensure that all tax obligations and benefits are duly considered.

Next Steps and Useful Resources at HVR Business Consulting:

• Net Salary Simulator 2026
• Youth IRS 2026 — Who Qualifies and How It Works
• HVR Tax Glossary — All Terms Explained
• Form 22 IRC 2026 (For Companies)
• Free Individual Analysis — Speak with Hugo Ribeiro →

Sources and Legal References

• Personal Income Tax Code (CIRS)
  • Article 9 – Category G - Capital Gains
  • Article 10 – Capital Gains
  • Article 43 – Value of Category G Income
• Law no. 31-A/2023, of 28 July – Amends the Personal Income Tax Code and the Tax Benefits Statute.
• Annual Ordinances of the Ministry of Finance – Approval of monetary depreciation coefficients (e.g., Ordinance no. 340/2023, of 9 November, for sales in 2024).
• Portal das Finanças – www.portaldasfinancas.gov.pt
• Instructions for Filling out IRS Form 3 and Annexes – Available annually on the Portal das Finanças.