P2P Lending Tax Guide for Portuguese Investors 2026

TL;DR

If you are a Portuguese tax resident earning interest from peer-to-peer (P2P) lending platforms, that interest is capital income (rendimentos de capitais, category E of the IRS). The headline rate is a flat 28%.

• Interest from a Portuguese-based payer is normally taxed at 28% by withholding at source (retenção na fonte), and you usually do nothing more.
• Interest from a foreign P2P platform (which is nearly all of them, because they are based in Latvia, Estonia, Lithuania, Switzerland, and similar) has no Portuguese withholding. You must declare it yourself on Anexo J, table 8-A, using income code E21, and you pay the 28% when you file.
• You can choose englobamento (aggregation): instead of the flat 28%, your capital income is added to your other income and taxed at progressive IRS rates. This only helps if your marginal rate is below 28% (roughly, lower incomes).
• Since 2024, unaggregated capital income above EUR 500 must be reported on your annual return even though it was already taxed at a flat rate.
• This guide is general information, not tax advice. Rules change and personal situations differ. Confirm figures on Portal das Financas or with a certified accountant (contabilista certificado) before filing.

1. How P2P interest is taxed in Portugal

When you lend money through a P2P platform, the interest the borrower pays you is income. Portugal puts this in category E of the personal income tax (IRS), called rendimentos de capitais, or capital income. This is the same category that covers bank deposit interest, bonds, and savings certificates.

The standard rate on interest for residents of mainland Portugal (Continente) and the Autonomous Region of Madeira is a flat 28%. This is called the taxa liberatoria, set out in Article 71 of the IRS Code (CIRS). Residents of the Autonomous Region of the Azores pay a reduced rate of 19.6% [verify] (source: Portal das Financas, Guia Fiscal de produtos financeiros).

There are two ways this 28% is collected:

Withholding at source (retencao na fonte). When the payer is a Portuguese entity, such as a Portuguese bank, it withholds 28% at the moment it credits the interest and pays it to the tax authority (Autoridade Tributaria e Aduaneira, AT). This is automatic and, as a rule, final (definitiva). You do not need to do anything else (source: Santander, Juros no IRS; CGD Saldo Positivo).

Self-assessment. When the payer is foreign and does not withhold Portuguese tax, you declare the interest yourself and the 28% is applied when your return is processed. This is the situation for almost every P2P platform (see section 3).

The englobamento option

Instead of accepting the flat 28%, you can elect englobamento (aggregation). This adds your capital income to your salary, pensions, and other income, and taxes the total at Portugal’s progressive IRS brackets.

Englobamento only saves you money if your overall marginal tax rate is below 28%. Portuguese guides put the break-even roughly at total taxable income below about EUR 23,000 to EUR 25,000 per year; below that band the lower IRS brackets can beat the flat 28%, so aggregation may produce a smaller bill or a bigger refund (source: CGD Saldo Positivo). Treat that figure as a rule of thumb, not a fixed legal threshold, because the exact break-even depends on your full income picture.

Two important points about englobamento:

• It is all or nothing. If you elect aggregation, you generally must aggregate all income of the same nature, not just the P2P part. Run the numbers on both scenarios before choosing.
• If your income is high, aggregation can push you into a higher bracket and cost you more than the flat 28%. In that case, leave the income taxed at the flat liberatoria rate.

2. Reporting on your IRS return

Portugal’s annual income tax return is Modelo 3, and it has several annexes (anexos). Which one your interest goes on depends on where the payer is based.

• Anexo E is for capital income obtained in Portugal (a Portuguese payer). Interest already withheld at 28% by a Portuguese bank is pre-filled or reported here (source: Sage, Anexo E rendimentos de capitais).
• Anexo J is for income obtained abroad (foreign payer). This is where P2P interest almost always belongs, because the platforms are foreign (source: Portal das Financas, rendimentos do estrangeiro).

There is one more rule that catches many investors off guard. Since 2024, capital income taxed at a flat rate that you did not aggregate must be reported on the annual return once it exceeds EUR 500 in the year, even though the tax was already settled. Assets held in countries or territories with clearly more favourable tax regimes (tax havens) must also be reported (source: Portal das Financas, Guia Fiscal de produtos financeiros). For foreign P2P interest the reporting on Anexo J is required regardless, so this mostly matters as a reminder that “already taxed” does not mean “no need to declare.”

3. Foreign platforms: the case that applies to almost everyone

The great majority of P2P platforms a Portuguese investor uses are not established in Portugal. Maclear is based in Switzerland; Mintos, PeerBerry, and Twino are in Latvia; Bondora and many others are in Estonia. None of them withhold Portuguese tax. That means the responsibility to declare and pay is entirely yours.

Here is how the foreign case works:

No Portuguese withholding. The platform pays you gross interest. Portugal receives nothing at source, so the 28% is collected only when you file (source: Literacia Financeira, declarar juros P2P).

Where it goes: Anexo J, table 8-A. Foreign interest is entered in Anexo J, Quadro (table) 8-A, using income code E21 - juros sem retencao de imposto em Portugal (interest without withholding tax in Portugal). You enter the total gross interest received during the year (source: Tax-Wizard, how to declare P2P income for IRS; Portal das Financas, Anexo J form).

Country of source = the platform’s home country. In table 8-A you must state the country of source. This is the country where the platform that pays you is headquartered, not the country where the underlying borrowers are located. The platform is the legal payer and your contractual counterparty, so for Maclear you would enter Switzerland, for Mintos or PeerBerry you would enter Latvia, and so on (source: Tax-Wizard, how to declare P2P income for IRS).

Foreign tax paid. If any tax was withheld abroad, you record that amount too, and Portugal may grant a credit for foreign tax to avoid double taxation. In practice, most EU P2P platforms withhold nothing, so this box is usually zero. Keep the platform’s annual tax statement in case AT asks.

No AT binding ruling on P2P. Be aware that the Portuguese tax authority has not published a binding ruling (informacao vinculativa) that deals specifically with P2P lending platforms. The E21 treatment described above is the consensus approach used by Portuguese tax practitioners and finance writers, not a rule AT has spelled out for P2P by name (source: Tax-Wizard, how to declare P2P income for IRS). If your amounts are large, get professional confirmation.

Record-keeping for foreign platforms

Because nobody pre-fills this for you, keep clean records:

• Download each platform’s annual account statement or tax report showing interest earned in the calendar year.
• Convert foreign-currency interest to euros if needed. Most EU platforms already pay in euros, which keeps this simple.
• Add up interest across all platforms and enter the combined total per country of source.
• Save statements for at least four years in case of an inspection.

4. Default losses: how they are treated

This is the point that surprises most P2P investors, so read it carefully.

P2P interest is taxed as category E capital income. Category E taxes the interest you receive; it does not have a built-in mechanism to offset a loss of principal when a borrower defaults. In the widely followed practitioner view, if a loan defaults and you lose part or all of the capital you lent, that loss is generally not deductible against your P2P interest and does not reduce your 28% bill. You are taxed on the gross interest you received, even in a year where defaults ate into your returns.

This differs from category G (capital gains on the sale of securities), where a negative balance between gains and losses can, under aggregation, be carried forward against future gains for up to five years (source: CGD Saldo Positivo). P2P interest does not sit in category G, so that carry-forward mechanism does not apply to it.

Two caveats:

• AT has not issued a binding ruling on the deductibility of P2P principal losses [verify]. The non-deductible treatment is the consensus, not a published AT position specific to P2P.
• The exact classification of a loss can depend on the platform’s legal structure (direct loan, claim assignment, structured note, etc.). If a large default has hit you, this is worth a professional review rather than a guess.

The practical takeaway: for tax purposes, plan on paying 28% on the interest you actually receive, and treat default losses as a hit you cannot write off. That makes diversification and platform selection matter even more, since you cannot lean on a tax refund to soften a bad loan.

5. Resources: where to verify

Tax rules change every year in the State Budget (Orcamento do Estado), so always confirm against primary sources before filing:

• Portal das Financas (the AT online portal): info.portaldasfinancas.gov.pt - the official IRS forms, guides, and the CIRS.
• Article 71 of the CIRS (taxa liberatoria of 28%): Portal das Financas, CIRS art. 71.
• Anexo J form and instructions: Portal das Financas, Modelo 3 Anexo J.
• AT Guia Fiscal de produtos financeiros: Portal das Financas guide.
• A contabilista certificado (certified accountant) for anything non-trivial, especially large portfolios, mixed residency, or significant defaults.

6. Frequently Asked Questions

Do I really have to declare P2P interest if the platform did not withhold anything? Yes. Foreign P2P interest has no Portuguese withholding, so declaring it on Anexo J, table 8-A, code E21, is how the 28% gets paid. Not declaring it is undeclared foreign income, which carries penalties.

What rate do I pay on P2P interest? A flat 28% for residents of mainland Portugal and Madeira, or 19.6% [verify] for Azores residents. You can instead choose englobamento to be taxed at progressive rates, which only helps if your marginal rate is below 28%.

Which country do I put as the source in Anexo J? The country where the platform is headquartered, not where the borrowers are. For Maclear that is Switzerland; for Mintos, PeerBerry, or Twino it is Latvia; for Bondora it is Estonia.

Can I deduct money I lost when a loan defaulted? As a rule, no. P2P interest is category E, and default losses on principal are generally not deductible against that interest. There is no AT binding ruling specific to P2P, so confirm with an accountant if a large loss is involved.

Is bank deposit interest and P2P interest taxed the same way? The rate is the same (28%). The difference is who collects it: a Portuguese bank withholds automatically, while a foreign P2P platform withholds nothing and you self-declare on Anexo J.

When is englobamento worth it? Roughly when your total taxable income is low enough that your marginal IRS rate is under 28% (often cited as below about EUR 23,000 to EUR 25,000, as a rule of thumb). Model both options in the tax software before you commit, because englobamento applies to all income of the same nature, not just P2P.

7. Bottom Line

For a Portuguese tax resident, P2P lending is taxed cleanly if you know the routine. Interest is category E capital income taxed at a flat 28%. Because your platforms are almost always foreign and withhold nothing, you self-declare the gross interest on Anexo J, table 8-A, code E21, with the platform’s home country as the source. Keep the englobamento option in mind if your income is low, remember that unaggregated capital income above EUR 500 still has to be reported from 2024, and plan around the fact that default losses generally give you no tax relief. When in doubt, verify on Portal das Financas or ask a certified accountant.

This article is general information for Portuguese tax residents and is not tax advice. Tax law changes and individual circumstances vary. Always confirm current rules on Portal das Financas or with a qualified professional before filing.

Top platform on CrowdIndex

Once you understand the tax mechanics, platform choice is what actually drives your net return, and default losses (which you cannot deduct) make quality selection critical. On CrowdIndex, the number one ranked platform is Maclear.

Maclear is a Switzerland-based platform supervised under a Swiss self-regulatory organisation (SRO) framework, offering advertised annual returns of roughly 14.5% to 14.9%. New investors can claim a EUR 30 welcome bonus. For a Portuguese investor, remember that Maclear is a foreign payer: its interest goes on Anexo J with Switzerland as the country of source, and no Portuguese tax is withheld at the platform, so the 28% is settled when you file.

Read the full review and current terms on the platform page: /platforms/maclear/.

Capital is at risk. P2P lending can lead to partial or total loss of the amount lent, and, as noted above, those losses are generally not tax-deductible. Diversify and invest only what you can afford to lose.