When you reinvest the proceeds from selling your main home into another property, Portuguese IRS rules generally give you 12 months from the replacement property’s acquisition to make it your or your household’s main home. This requirement comes from Article 10(6)(a) of the Portuguese Personal Income Tax Code (CIRS).
The deadline should be considered alongside the reinvestment window, the conditions applying to the home sold, and the requirement to establish your tax address at the replacement property. Buying another house does not, by itself, secure capital gains relief.
What is Portugal’s main home reinvestment relief?
Article 10(5) CIRS allows qualifying gains from the sale of a main home—known in Portugal as habitação própria e permanente (HPP)—to be excluded from personal income tax when the statutory conditions are met.
The amount relevant to full reinvestment relief is generally the sale proceeds after repayment of an outstanding loan originally taken out to acquire the property sold. Reinvesting only the capital gain may therefore be insufficient.
Qualifying reinvestment can include buying another main home, purchasing land and constructing a main home, or extending or improving another property for that purpose. The replacement property must be in Portugal, another EU Member State, or an eligible EEA country with tax information exchange.
This article focuses on purchasing a replacement home. Construction and improvement projects have different statutory requirements.
Legal basis: Article 10(5), (6) and (12) CIRS.
Is the deadline to make the new property your main home six or 12 months?
For the purchase of a replacement home under the IRS reinvestment regime, the relevant deadline is 12 months after reinvestment. In a straightforward property purchase, this is counted from the acquisition.
Article 10(6)(a) denies the relief if the buyer fails to make the acquired property their or their household’s home within that period. The 12-month provision already appeared in the version of Article 10 applicable before the October 2023 amendments; it is not a new concession introduced in 2026.
What does AT Binding Ruling no. 29875 clarify?
In Binding Ruling no. 29875, approved on 22 July 2026, the Portuguese Tax and Customs Authority (AT) confirms that the taxpayer has 12 months from acquisition to allocate the replacement property to HPP use.
The ruling also discusses a separate six-month requirement associated with an IMT benefit for rehabilitated property under Article 45 of the Tax Benefits Statute. Complying with that shorter requirement can fit within the IRS deadline, but the two benefits have separate conditions.
A deadline applying to an IMT benefit should not automatically be treated as the deadline for IRS capital gains reinvestment relief.
The ruling is administrative guidance applying the law to its stated facts. Its binding effect operates within the statutory binding-ruling framework; it is not a general approval of every taxpayer’s reinvestment claim.
Which reinvestment deadlines should homeowners track?
Several separate tests can apply to the same transaction.
| Requirement | General rule for the main home reinvestment regime |
|---|---|
| When the reinvestment takes place | Within 24 months before or 36 months after the sale |
| When a purchased replacement property becomes the main home | Within 12 months after acquisition |
| Prior use of the property sold | Under the current wording, HPP use evidenced by tax domicile during the 12 months before the sale, or before an earlier reinvestment, subject to statutory exceptional circumstances |
| Declaring the intention to reinvest | In the IRS return for the year of sale, stating the intended amount, including a partial reinvestment |
| Tax address at the replacement home | The current legislation also requires the taxpayer or household to establish their tax domicile there |
These are the ordinary statutory rules. Historical transactions require the legislation and any relevant transitional provisions applicable to their dates to be checked.
What if you buy the new home before selling the old one?
Buying first can fall within the 24-month pre-sale reinvestment window. However, the current law also tests the previous home’s qualifying use by reference to the earlier reinvestment date where applicable.
Binding Ruling no. 29875 expressly addresses this distinction. Homeowners should therefore plan the acquisition, move and subsequent sale together, taking account of the separate 12-month deadline for making the new property their main home.
Does changing your tax address prove that the property is your main home?
Your registered tax address is important, but the property’s actual use also matters.
Article 13(12)–(15) CIRS establishes a rebuttable presumption linking tax domicile to a taxpayer’s main home and allows legally admissible evidence to the contrary. At the same time, Article 10 contains express requirements concerning tax domicile for reinvestment relief.
These provisions need to be read together. An address entry alone does not establish that all reinvestment conditions have been met. Equally, a discrepancy between actual occupation and the date recorded by AT requires a careful review of the facts, evidence and applicable law.
Does a late address update automatically mean the relief is lost?
It is essential to distinguish between an update made after acquisition but within the 12-month period, and an update made after that period has expired.
An update made more than six months after acquisition is not, for that reason alone, outside the 12-month IRS occupation deadline. Nevertheless, the actual main home use and all remaining conditions must still be established.
Where registration occurs after the applicable deadline, evidence of earlier occupation may support a request to correct or reassess the position. However, it should not be assumed that such evidence automatically overrides an express statutory requirement to establish tax domicile. Acceptance depends on the applicable legislation and the circumstances.
GoalSeek interpretation: the evidential provisions may support an argument about actual residence, but they do not provide an automatic waiver of the specific reinvestment conditions.
What evidence can help demonstrate main home use?
Where the occupation date is questioned, a consistent documentary record can help establish when the property became the taxpayer’s normal home.
| Evidence | Potential relevance |
|---|---|
| Water and electricity bills showing consumption | Supports actual use over the relevant period |
| Internet or other household service records | Supports the establishment of an ordinary household |
| A parish council residence certificate | May help corroborate residence and its timing, depending on its basis |
| Official correspondence received at the property | Helps establish an address chronology |
| Moving records and other dated documents | May support the physical move |
| Records of unsuccessful address-change requests | May help explain an administrative delay |
These are practical examples of potentially relevant evidence, rather than a statutory checklist. A utility contract or ownership deed alone may establish a connection to a property without proving that it was the main home. Documents should be assessed together and linked to the disputed dates.
What should you do if AT questions the reinvestment?
Start by identifying the precise condition AT considers unmet. A disagreement about the occupation deadline is different from a disagreement about the amount reinvested or the previous property’s qualifying use.
A structured response should set out the sale and acquisition dates, the relevant statutory provisions, the occupation and tax-address chronology, and the supporting documents. Where the issue is the deadline for occupying a purchased replacement home, Article 10(6)(a) and Binding Ruling no. 29875 are directly relevant.
If an assessment has already been issued, the appropriate formal remedy and its deadline must also be checked. An informal e-balcão exchange should not be assumed to preserve or suspend the deadline for a reclamação graciosa or another available challenge.
Frequently asked questions
Do I have to move into the replacement home immediately?
For a purchased replacement property under Article 10(6)(a), the legislation allows up to 12 months after reinvestment to make it your or your household’s main home. The other relief conditions and tax-address obligations also apply.
Is it enough to reinvest the profit from the sale?
Generally, no. Full relief is assessed by reference to the qualifying sale proceeds after repayment of the acquisition loan, rather than simply the profit. Partial reinvestment can produce a proportional exclusion of the gain.
Can a second home qualify as the replacement property?
It must become your or your household’s main home within the applicable period. Buying a property that remains a holiday home does not satisfy that requirement.
Can the replacement home be outside Portugal?
Yes, subject to the statutory conditions: the property may be in another EU Member State or an eligible EEA country with tax information exchange. A property elsewhere should not be assumed to qualify.
Does a 2026 ruling automatically determine an earlier transaction?
No. A later ruling can help explain a provision, but an earlier transaction must be assessed under the law and transitional rules applicable to it. The 12-month occupation deadline already existed before 2026.
Planning a home sale or reviewing a reinvestment claim?
GoalSeek advises homeowners and international residents on Portuguese property capital gains, reinvestment planning and IRS reporting.
Contact GoalSeek for a review of your sale, replacement purchase and residence timeline. An assessment before completion can help identify the relevant deadlines, calculate the required reinvestment and organise the evidence supporting your claim.
This article provides general information. Eligibility depends on the applicable legislation, transaction dates and evidence.
Official sources
- Legislation: CIRS, Article 10, particularly paragraphs 5, 6 and 12; consolidated wording accessed on 30 October 2026.
- Legislation: CIRS, Article 13, paragraphs 12–15, concerning tax domicile, main home presumptions and evidence.
- Historical legislation: Article 10, wording in force before the October 2023 amendments, confirming that the 12-month occupation rule already existed.
- Administrative guidance: AT Binding Ruling no. 29875, approved on 22 July 2026, on reinvestment before sale and the deadline for main home use.
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