Self-employed contribution (cuota de autónomo) in 2026: flat rate, income-based payments and year-end adjustment

What the contribution (cuota) is and how it adds up

The cuota is your monthly payment into the RETA (the self-employed Social Security scheme). It is not a tax: it is the contribution that gives you sick pay, a pension, cese de actividad and so on.

Sort out my contribution case

Since 2023 it works as cotización por ingresos reales: the amount depends on your net earnings (rendimientos netos), not on a freely chosen base.

You pick a contribution base within the bracket (tramo) for your expected income; cuota = base × the contribution rate (around 31.5%).

The reduced flat rate (tarifa plana) is a reduced flat contribution (cuota, around €80/month) for new self-employed workers (autónomos) in the first period.

Tarifa plana: who qualifies and how much in 2026

• Around €80/month for the first 12 months — for new self-employed workers (autónomos) who have not been autónomo in the previous 2 years (3 in some cases).
• A further 12 months at a reduced cuota — if your net income in that period stays below the SMI (minimum wage).
• After the tarifa plana — pay by income bracket: roughly from ~€205/month (low income) up to ~€605/month (high), with the exact 2026 figures updated yearly.
• There are extra bonificaciones in some situations (young workers, disability, care leave) — check your case.

What you are entitled to

• The right to choose a contribution base within your bracket for your expected income, and to change it several times a year.
• The right to the tarifa plana when you meet the new-registration conditions.
• The right to a regularización: if you paid more or less than your real income, Social Security refunds or charges the difference.
• The right to bonificaciones and to recalculate your base when your income changes.
• The right to challenge a wrong recargo or assessment and to request aplazamiento (instalments) on a debt.

Deadlines and the year-end regularización

• The cuota is charged monthly (usually at the end of the month) to your linked IBAN.
• You can change your base up to 6 times a year — changes take effect on a fixed calendar (every two months).
• Through the year you should keep your base close to your real income: each year Social Security cross-checks it against your tax return.
• The regularización happens the following year: overpayments are refunded; an underpayment must be paid by the stated deadline.

What to prepare

• An estimate of your yearly/monthly net income (income minus expenses and a ~7% flat deduction).
• NIE and a certificado digital or Cl@ve — for Import@ss.
• A Spanish IBAN for the cuota direct debit.
• Details of any previous self-employment registration (alta de autónomo) to check tarifa plana eligibility.

How to set and change your contribution (cuota) base

• Estimate your expected monthly net income → find your tramo in the Social Security table.
• At registration, request the tarifa plana if you qualify (around €80/month).
• Pick a base within your bracket: a lower base means a lower cuota, but also lower future pension/benefits.
• Change your base through Import@ss when your income changes (up to 6 times a year) to avoid a big regularización.
• Watch for the regularización notice and check the calculation — you can object if it is wrong.

Common mistakes

• Staying on the minimum base while your income grows → a large top-up at the regularización.
• Not requesting the tarifa plana at registration when you are entitled to it.
• Ignoring the regularización letters → recargo and debt.
• Not lowering your base when income drops → overpaying all year.
• Not paying the cuota → recargo, a Social Security debt and the risk of embargo.

Non-payment, recargo and debt

• A late cuota triggers a recargo (surcharge); the debt then moves to enforced collection (vía ejecutiva).
• An accumulated Social Security debt can lead to an embargo of your account or assets.
• You can request aplazamiento/fraccionamiento (instalments) on a cuota debt — check the conditions.
• Sometimes there are grounds to challenge a recargo or a regularización amount — gather your alta, statements and notices.

Related guides

Frequently asked questions

Official sources