Request the additional minimum supplement to your pension at the INSS

What you need to have to hand

1. Cl@ve, certificado digital or DNIe to access Tu Seguridad Social.
2. Resolución de tu pensión (the PDF the INSS sent when they recognised it).
3. Income documents: latest Renta or certificado de imputaciones from the AEAT, payslips, interest, rentals, other pensions (also foreign).
4. Padrón histórico y colectivo if you claim cohabitation/dependent spouse.
5. Libro de familia or marriage certification (only if you declare a dependent spouse).
6. IBAN where you receive the pension.

Documentation

• DNI/NIE (and the spouse’s if applicable).
• Resolución de pensión in force.
• IRPF: tax return or certificado de imputaciones (get it at sede.agenciatributaria.gob.es).
• Proofs of current income: statements of pensions (Spanish or foreign), interest, rents, public benefits.
• Empadronamiento histórico y colectivo to prove cohabitation/dependent spouse.
• Libro de familia or certification from the Registro Civil (if applicable).

Step by step

1. Go to Tu Seguridad Social: https://sede.seg-social.gob.es/wps/portal/tuss and log in with Cl@ve or certificado.
2. Go to Pensiones > Mis gestiones and find Solicitar complemento a mínimos. If you don’t see it, go to Variaciones/Comunicaciones about your pension and select the complemento option.
3. Fill in the expected income for the year: yours and, if applicable, your dependent spouse’s. Mark marital status and cohabitation exactly as they appear in the padrón/Registro Civil.
4. Attach the PDFs: IRPF or certificado de imputaciones, padrón colectivo, Libro de familia (if applies) and proofs of other income. Check that files don’t exceed the maximum size set by the Sede.
5. Sign and submit. Download the resguardo with CSV and keep it. If something is missing, use Aportar documentación a una solicitud on the same Sede.
6. If you go in person, book cita previa from the INSS Sede (Cita Previa button), bring originals and copies and say it is a complemento a mínimos for an already recognised pension.
7. Track the status in Tu Seguridad Social > Tus gestiones and check notifications on the Sede.

Time-saving tips

1. Get the certificado de imputaciones in 2 minutes at the AEAT if you don’t file Renta.
2. Request the padrón histórico y colectivo online from your ayuntamiento if available (in Madrid: sede.madrid.es; in others, check the municipal sede electrónica).
3. If you receive a foreign pension, attach a certificate from the paying entity. This avoids requests for more documents.
4. If cita previa is impossible to get, try early morning several days in a row. It’s a common pain.
5. Keep everything in a single PDF per concept (income, padrón, marriage). Fewer rejections for size/format.

Common mistakes that can ruin the process

1. Not declaring small incomes (interest or rentals): the INSS treats them the same and will ask for repayment.
2. Claiming a dependent spouse without proving marriage and cohabitation: certain denial.
3. Uploading huge or blurry files: Sede error or request and weeks lost.
4. Not notifying when your income rises: they remove the supplement and you must repay with surcharges.
5. Outdated padrón data: if your declared cohabitation doesn’t match the padrón, you’ll have problems.