Stacking the Complemento Solidário para Idosos (CSI) on Top of a Low Portuguese Pension in 2026 — A Practical Guide to the €8,040 Reference Value, the 66Y9M Threshold, the Six-Year Residence Rule and the Benefícios Adicionais de Saúde Auto-Attachment

The Complemento Solidário para Idosos (CSI, Solidarity Supplement for the Elderly) is the means-tested non-contributory top-up that Segurança Social pays alongside an existing low Pensão de Velhice (Old-Age Pension), Pensão de Sobrevivência (Survivor's Pension) or Pensão de Invalidez (Disability Pension), to bring the beneficiary's total income up to a floor set as the valor de referência (reference value). It was created by Decreto-Lei n.º 232/2005 of 29 December, sits inside the regime não contributivo da segurança social (non-contributory social-security regime) and is administered by the Instituto da Segurança Social (ISS). For 2026 the reference value runs at €8,040 a year — €670 a month at the standard 12-month annualisation — and the programme as a whole counts 239,771 beneficiaries on the latest March 2026 read, an 11% year-on-year increase. This guide walks through eligibility, the income and capital tests, the application flow, and the benefits — especially the auto-attached Benefícios Adicionais de Saúde (BAS, Additional Health Benefits) — that flow from CSI award.

Who Can Claim the CSI

Six conditions stack and must all be satisfied for an award. First, age. The claimant must be at least the idade legal de acesso à Pensão de Velhice (legal old-age pension threshold) — which for 2026 is 66 anos e 9 meses (66 years and 9 months), the same threshold as the contributory Pensão de Velhice and one month higher than the 66Y8M floor used for 2025 claims (the gov.pt service page is still showing the 66Y7M 2025 floor in the public service description — the operational threshold inside Segurança Social Direta has already moved to 66Y9M for filings opened on or after 1 January 2026).

Second, residence. The claimant must have lived in Portugal for at least six consecutive years prior to the date of application — established through an atestado da junta de freguesia (residence certificate from the parish council) of the place where the claimant lives. Portuguese citizens and EU/EEA/Switzerland nationals submit the atestado directly. Third-country nationals — Brazilian, Cape Verdean, Angolan, Mozambican, US, UK, Indian and other passport-holders — must additionally produce the título de residência (residence permit) at AIMA confirming the same six-year run, or other títulos previstos na lei evidencing the residence span.

Third, the pension-recipient condition. The claimant must already be receiving the Pensão de Velhice, Pensão de Sobrevivência or Pensão de Invalidez from Segurança Social, or have applied for the Pensão Social de Velhice (Social Old-Age Pension, the non-contributory cousin of the contributory Pensão de Velhice) and had it denied for income reasons. Pensão Social is denied where the claimant's monthly income exceeds 40% of the Indexante dos Apoios Sociais (IAS, Social Support Index) for single claimants or 60% of the IAS for couples — which in 2026 lands at €214.85 single and €322.28 couple (the IAS for 2026 is €537.13 under Portaria n.º 480-A/2025/1 of 30 December 2025, up 2.8% on the 2025 IAS of €522.50).

Fourth, the non-cumulation condition. The CSI cannot be paid to a beneficiary who is simultaneously receiving the Prestação Social para a Inclusão (PSI, Social Inclusion Benefit) — the integrated disability welfare programme. If the claimant is an invalidity pensioner who could qualify for PSI, the operational choice is normally to take CSI when the contributory record is short and PSI when the disability protection package is more valuable; the simulator linked from Segurança Social Direta will model both routes.

Fifth, the rendimentos (income) ceiling. For a titular isolado (single claimant), gross annual income before deductions must not exceed the valor de referência — €8,040 in 2026. For a married claimant or one in a união de facto (consensual union) of more than two years, the household ceiling is 1.75 times the reference — €14,070 in 2026 — and within that, the claimant's own personal income cannot exceed €8,040. The income captured includes all pensions and supplements, including those paid by foreign social-security regimes, employment and self-employment income, business and professional income, rental income from real estate, and investment income from movable property. The income of cohabiting children is no longer treated as an exclusion condition — that 2023 rule change opened CSI access to a wider population whose adult-child contributions were previously disqualifying.

Sixth, the consent condition. The claimant must authorise Segurança Social to access tax records held by the Autoridade Tributária (AT) and bank-account information held under the segredo bancário regime for cross-verification of the declared income figures, and must commit to applying for any other Segurança Social benefit to which they are entitled — the CSI cannot be claimed as an alternative to a benefit the claimant could draw directly.

How the Payment Is Calculated

The payment formula is a top-up: the monthly CSI equals one-twelfth of the difference between the annual valor de referência and the claimant's annual income, divided by twelve. For a single claimant on a €5,000 a year Pensão de Velhice — a €416.67 monthly pension — the gap to the €8,040 reference is €3,040 a year, which divided by twelve gives €253.33 a month CSI; the total monthly income lands at €670 (€416.67 + €253.33), exactly the reference. For a couple with combined annual income of €11,500 (one spouse on Pensão de Velhice at €7,500, the other on Pensão de Sobrevivência at €4,000), the gap to €14,070 is €2,570, giving €214.17 a month CSI distributed across the household. Capital and movable-property assets are not directly deducted from the CSI but generate imputed income — broadly 5% of net asset value above thresholds — which is added to the declared rendimentos for purposes of the ceiling test.

The Application Flow

The fastest route is online through Segurança Social Direta (SSD) at seg-social.pt, using either the Chave Móvel Digital (CMD) or the Cartão de Cidadão (CC) with a card reader. The CSI menu lives under Ação Social > Apoios e Respostas Sociais > Complemento Solidário para Idosos > Consultar e pedir Complemento Solidário para Idosos, where the requerimento is opened in a webform and the supporting documents are uploaded as PDF attachments. For couples, both spouses must hold a Número de Identificação de Segurança Social (NISS); if one does not, the Requerimento de Identificação RV 1017 DGSS is submitted as a first step.

The Loja de Cidadão and Segurança Social atendimento balcões (counters) accept paper submissions of three forms: CSI 1 (the main requerimento), CSI 1/2 (the Anexo Rendimentos — declaration of all income sources by claimant and cohabiting spouse), and CSI 1/4 (the instruções de preenchimento). MG 16, the Declaração de Autorização de Pagamento a Terceiro, is added if the claimant wants the benefit paid into the account of a family member, caregiver or social institution. The CSI 1 includes the consent line for AT and bank-information access — the cross-verification requirement set out in the eligibility criteria above.

Supporting documents are stacked by source. Identification: Cartão de Cidadão (or Bilhete de Identidade and Cartão de Identificação da Segurança Social and Número de Identificação Fiscal) for both claimant and cohabiting spouse. Residence: atestado da junta de freguesia for Portuguese and EU/EEA/Swiss nationals; título de residência or equivalent for third-country nationals. Pensions: documents evidencing all non-Segurança Social pensions, complementos and subsídios received — this is the key step for retirees with a UK State Pension, US Social Security cheque, Brazilian INSS pension or German Deutsche Rentenversicherung payment, which must be declared and converted to euros at the BCE reference rate for the income test. Real estate: Caderneta Predial or Certidão de Teor Matricial issued by Finanças for all properties other than the primary residence. Financial assets: bank statements, Certificados de Aforro, Certificados do Tesouro, share holdings or other mobile-property documents from the holding institution.

The legal decision window is 90 days from the date Segurança Social receives the completed application file, although operational decision times have been running shorter under recent simplification efforts. If the application is granted, the CSI is paid monthly by transferência bancária or by vale de correio (postal money order) on the scheduled date for each month — the published Segurança Social calendar pins June 2026 CSI payment to 7 June.

The Auto-Attached Benefícios Adicionais de Saúde (BAS)

The most under-known feature of CSI is the BAS package that auto-attaches when CSI is awarded. The BAS frame is set out in a separate Guia Prático at Segurança Social. The core entitlement is gratuidade total nos medicamentos comparticipados (full free access to subsidised prescription medication) — the beneficiary presents the prescription receita médica at the farmácia and pays nothing, with Segurança Social settling the full cost rather than the standard SNS co-payment. Adjacent BAS components include reimbursement support for sole-purchase oculistic devices (spectacles), comparticipations on próteses (dental and other prosthetics) and on calçado ortopédico (orthotic footwear). The BAS does not require a separate application — it activates automatically on CSI award, identified through the Cartão do Cidadão record at the farmácia and at the BAS-protocolled providers.

What CSI Stacks With

The CSI is designed to stack — that is the whole point of the supplement architecture. Compatible benefits include all three contributory pensions (Velhice, Sobrevivência, Invalidez do regime geral), the non-contributory Pensão Social de Velhice and Pensão Social de Invalidez (do regime especial de proteção da invalidez), and the Complemento por Dependência (the dependency supplement paid where the beneficiary requires third-party assistance for basic daily activities). The non-cumulation is restricted to the PSI — the social-inclusion benefit, as set out in the eligibility section — and to a small set of other welfare instruments that the SSD simulator will flag at application time.

Renewal and the Annual Income Review

CSI is not a one-off award. Once granted, Segurança Social conducts an annual income-and-asset review, drawing on the AT cross-flagging the beneficiary consented to at application. If income rises above the reference value during the year, the CSI is paused or scaled down on the monthly statement; if income falls (for example, the death of a spouse and the resultant loss of a Pensão de Sobrevivência), the CSI is recalculated upward through the SSD update flow. The beneficiary's duty is to report material income, household or asset changes — particularly inheritance receipts, property sales or pension awards from abroad — to Segurança Social as they occur. Failure to report can trigger reposição (clawback) of overpaid benefit plus interest, and in serious cases criminal exposure for fraude contra a Segurança Social.

Practical Tips Drawn From the Atendimento Tape

• Do the Pensão Social step first if the contributory record is short: If the claimant's Segurança Social Pensão de Velhice has been denied for failing the 15-year carência (qualifying period), the Pensão Social de Velhice application is the doorway into CSI eligibility. The forms can be filed concurrently — RP 5002 DGSS for the Pensão Social and CSI 1 for the supplement — to compress the timeline.
• Foreign-pension reporting is the single biggest stumbling block: Claimants who omit a UK, US, German, Brazilian, French or Swiss pension at application and have the omission caught at the annual income review face reposição of all CSI paid since the omission, with interest. Declare every foreign pension explicitly on the CSI 1/2 anexo even when the amounts are small.
• Use the SSD simulator before filing: The Segurança Social Direta simulator at seg-social.pt prices the CSI expected award given the income profile entered, and flags any non-cumulation collision (most often with PSI or with a hidden municipal welfare top-up). Running the simulator before the requerimento avoids most denial reasons.
• The atestado da junta de freguesia is the residence anchor: The six-year Portugal-residence requirement is checked first against the atestado da junta de freguesia, then cross-verified against AT tax-residence records and AIMA residence-permit records. If the atestado is dated more than 90 days before the application, the SSD will reject it as stale; obtain a fresh atestado in the week before filing.
• Couples should file together where possible: The household income ceiling for couples (€14,070) is higher than 2× the single ceiling, but only when both spouses are co-claimants and both file. If only one spouse files, the test reverts to the single-claimant ceiling on combined household income — which can deny eligibility for households that would qualify under the joint filing.

What This Means for Expats and Residents

• Foreign retirees with short Portuguese contributory records can reach the €670 floor: If your contributory Segurança Social Pensão de Velhice lands at €300 because of a short Portuguese career, CSI can lift you to €670 a month — provided your foreign pensions and other income do not already exceed the €8,040 annual ceiling. Brazilian INSS, UK State Pension, US Social Security and German Rentenversicherung receipts must all be declared and converted to euros for the test.
• The auto-attached BAS is the most-overlooked benefit: The free-prescription entitlement that comes with CSI can be worth €500–€1,500 a year on its own for beneficiaries with chronic-disease prescriptions — comparable to the cash CSI top-up for some beneficiaries. Do not skip the CSI application just because the cash top-up is small; the BAS often makes the application worthwhile.
• Couples in união de facto: file the cohabitation declaration first: The couple-rate ceiling (€14,070) applies to married couples and to unions of more than two years registered through the Lei n.º 7/2001 framework. If you are in a long-term cohabitation without formal recognition, file the declaração da junta de freguesia under Lei 7/2001 before applying for CSI to unlock the couple-rate ceiling.
• The six-year residence rule excludes recent arrivals: If you arrived in Portugal under the D7 visa in 2023 or later, you cannot claim CSI in 2026 — even if your pension income would qualify — because the six-year residence requirement is binding. Plan your residence timeline accordingly if CSI is part of your retirement-income projection.
• Annual review is automated — but reporting changes is your duty: The AT cross-flag covers most income changes inside Portugal automatically. Foreign pension increases, inheritance receipts, or property sales abroad are not picked up automatically and must be reported manually through SSD or at the Loja de Cidadão. Reposição risk is real; report changes within 30 days to stay clean.

The Guia Prático 8002 — Complemento Solidário para Idosos and the Guia Prático Benefícios Adicionais de Saúde are both available on seg-social.pt under Documentação de Apoio on the CSI section page. The 2026 reference value (€8,040 annual / €670 monthly) and the 2026 IAS (€537.13) are set by Portaria n.º 480-A/2025/1 of 30 December 2025. We will return to the file at the next March payment-tape release, which historically prints the year-on-year beneficiary count and the average award size.