Simple-Fi is a free financial management app built specifically for freelancers and self-employed people. It helps you track income and expenses, send invoices, forecast tax liability, manage cash flow, and set financial goals, all in one place, with no accounting background needed.

Does Simple-Fi support Portuguese freelancers on recibos verdes?

Yes. Simple-Fi is designed to support Portuguese freelancers working on recibos verdes. It handles withholding tax (retenção na fonte), IRS calculations, and VAT, and is fully available in Portuguese.

Which country does Simple-Fi support?

Simple-Fi is built for freelancers in Portugal. Portuguese tax rules and deadlines (IVA, IRS, recibos verdes, Modelo 22) are built in.

Is Simple-Fi free to use?

Yes, Simple-Fi is free to use. Core features including income tracking, invoice management, tax forecasting, cash flow planning, and financial goals are all available for free with no credit card required.

What financial tools does Simple-Fi include?

Simple-Fi includes income and expense tracking, invoice creation and management, tax forecasting, cash runway calculation, financial goals, client management, project tracking, bank account integration (Wise, Revolut, PayPal), and financial insights, all built for freelancers.

O que é a Simple.fi?

A Simple.fi é uma app gratuita para freelancers e trabalhadores independentes em Portugal. Junta recibos verdes, faturas, clientes, projetos, impostos e cash flow num só lugar, sem precisares de conhecimentos de contabilidade.

A Simple.fi ajuda com recibos verdes?

Sim. A Simple.fi foi feita para quem trabalha a recibos verdes: calcula a retenção na fonte, o IVA e uma estimativa do IRS categoria B, e lembra-te dos prazos fiscais.

Qual é a melhor app para trabalhar como independente em Portugal?

A Simple.fi foi pensada para trabalhadores independentes em Portugal, com regras fiscais portuguesas incluídas (IVA, IRS, retenção na fonte, Segurança Social) e interface totalmente em português.

A Simple.fi é gratuita?

Sim. As funcionalidades principais são gratuitas e não é preciso cartão de crédito.

Simple.fi manages 5 data types including transactions. Helps you organize, track, and share your work in 1 place for teams and solo users.

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Taxes & income tax

How to submit your quarterly Social Security declaration in October 2026

SFSimple.fi Team5 October 20263 min read

Freelancer checking their computer to handle the quarterly Social Security declaration — Photo from a free public source (Unsplash, Pexels, Wikimedia Commons). To be swapped for a topic specific one.

October brings a key obligation for all freelancers in Portugal. You have until the 31st to submit your quarterly declaration to Social Security.

What is the quarterly declaration

The quarterly declaration is the mechanism that allows Social Security to adjust your monthly contributions based on the income you actually received. By declaring the values from the previous months, you ensure that your contribution calculation is fair and reflects your professional reality.

Deadline and how to proceed

According to technical information from the Order of Certified Accountants, the deadline for submitting this declaration is October 31, 2026. The process must be carried out exclusively through the Social Security Direct portal.

Access the Social Security Direct portal using your password or Digital Mobile Key.
Select the Employment option and then Freelancers.
Choose the Quarterly Declaration option.
Enter the income values obtained in July, August, and September 2026.
Confirm the data and submit the form.

Important note: Even if you had no income during the quarter, you must access the portal and declare zero. Failure to meet this deadline may result in penalties and the official setting of your contribution base.

Why accurate declaration matters

Declaring the correct values is essential to avoid surprises in the calculation of your future contributions. Remember that the contribution base is calculated based on 70% of your average quarterly income, so the accuracy of the data entered directly impacts the amount you will have to pay monthly.

Official sources

This article is for information only and does not replace personalized tax or accounting advice. Rates, limits, and rules can change. Always check your situation with a certified accountant or the official bodies listed above.

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With Simple.fi, you receive automatic alerts about your tax and Social Security obligations, keeping your accounting always up to date.

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