Tax guides

Updates

Finbooks Lab

The multi-broker rule in five points

Your broker account is not the boundary of the Section 104 pool

Combine your brokers before calculating the gain

HMRC’s matching order for shares

Transactions across Broker A and Broker B

Why Broker A cannot calculate this gain correctly on its own

Before you accept the final gain

7 days free trial

Why can’t you calculate each broker separately?

How do HMRC matching rules apply across multiple brokers?

How do you combine multiple brokers before Self Assessment?

How do you calculate capital gains and losses across multiple brokers in the UK?

What you need to know

What was missed | UK tax issue | Usual reporting route |
| :--- | :--- | :--- |
| Sale of shares, ETFs or funds outside an ISA | The disposal can create a chargeable gain or allowable loss after UK share-matching rules are applied. | SA108 Capital Gains Tax summary. |
| UK dividends | Dividend income is considered separately from capital gains, including amounts within the £500 Dividend Allowance. | SA100 dividends section where reporting is required. |
| Foreign dividends | The gross dividend normally enters the UK calculation; eligible foreign tax may support a credit claim. | SA106 Foreign pages, subject to the applicable reporting route. |
| Interest on broker cash | Interest is savings income even when it remains on the investment platform. | SA100 or SA106, depending on the source. |
| Foreign share or fund disposal | A UK resident may have a UK capital gains position even when the broker and asset are overseas. | SA108, with foreign tax relief considered separately where relevant. |
| Activity inside a qualifying ISA | Eligible gains and income inside the wrapper are generally exempt, and losses cannot normally be claimed outside it. | Not normally included in Self Assessment.

Common investment omissions and where they belong

A broker report is evidence, not the completed UK calculation

Reconcile every broker before correcting the return

Failure | Possible consequence | Key distinction |
| :--- | :--- | :--- |
| Late return | £100 initially, followed by daily and further penalties after 3, 6 and 12 months. | The initial £100 can apply even if the final calculation shows no tax due. |
| Late payment | Interest and penalties of 5% of unpaid tax at 30 days, 6 months and 12 months. | These charges depend on the unpaid balance. |
| Incorrect return | Up to 30%, 70% or 100% of potential lost revenue under the standard careless, deliberate and deliberate-and-concealed categories. | The range depends on behaviour, whether disclosure was prompted and the quality of cooperation. |
| Failure to notify | A tax-geared penalty where HMRC was not told that a liability existed. | A reasonable excuse can prevent a non-deliberate penalty; timing and disclosure still matter. |

How the main HMRC penalty routes differ

Foreign investments can extend the enquiry window

Records to collect before making the correction

Investment tax penalty questions

Which investment omissions can lead to HMRC penalties?

How does HMRC calculate penalties for undeclared investment income or gains?

How do you correct undeclared shares, dividends or foreign investments?

HMRC investment tax penalties: what happens if you don’t report shares, dividends or foreign investments?

What you need to know for 2025/26

Investment activity | Typical UK tax treatment | Usual reporting route |
| --- | --- | --- |
| Investments held inside an ISA or registered pension | Eligible gains and income remain within the tax wrapper; losses cannot normally be claimed outside it. | Not normally reported on your personal SA100 or SA108. |
| Sell listed shares, investment trusts or qualifying listed ETFs | A capital gain or allowable loss, calculated in pounds under HMRC’s matching rules. | SA108, Listed shares and securities. |
| Sell unlisted or AIM shares | A capital gain or allowable loss, with separate treatment for any relief or election claimed. | SA108, Unlisted shares and securities. |
| Receive UK company dividends | Dividend income, including amounts covered by the Dividend Allowance. | SA100, UK dividends. |
| Receive fund distributions | Dividend or interest income depending on the fund and distribution type, including automatically reinvested amounts. | SA100 or SA106, according to the fund. |
| Receive cash interest or bond coupons | Savings income rather than a capital gain. | SA100 for UK interest; SA106 may be needed for foreign interest. |
| Receive foreign dividends | Foreign income reported in pounds, with overseas withholding tax considered separately. | SA100 for limited amounts where its conditions apply; otherwise SA106. |
| Dispose of an interest in a non-reporting offshore fund | The gain is normally an offshore income gain charged to Income Tax rather than Capital Gains Tax. | SA106, Other overseas income and gains. |
| Close an option, future, CFD or other derivative | Capital treatment is common for private investors, but the contract and nature of the activity can change the result. | SA108 or the relevant income pages, depending on the facts. |

Where common investment activity is usually reported

Your broker’s profit is not your UK taxable gain

SA100 only provides limited shortcuts for foreign income

2025/26 is the first year of the Foreign Income and Gains regime

Bring every broker into one UK tax calculation

Return section | What usually goes there | What to check |
| --- | --- | --- |
| SA100 boxes 1 and 2 | Taxed and untaxed UK interest. | Use the interest credited for the year, not the closing cash balance. |
| SA100 box 4 | Dividends from UK companies. | Enter the full dividend amount required by the form, including amounts within the allowance. |
| SA100 box 5 | Other dividends, including relevant authorised unit trust, OEIC and investment-trust distributions. | Include reinvested distributions where applicable. |
| SA100 boxes 3, 6 and 7 | Limited foreign interest and dividend amounts where the SA100 conditions apply. | Check the £2,000 interest and £500 dividend limits and whether foreign tax relief is being claimed. |
| SA106 | Foreign interest, dividends, withholding tax, excess reportable income and offshore income gains. | Report the correct sterling amounts and consider Foreign Tax Credit Relief separately. |
| SA108 boxes 23 to 30 | Listed shares and securities, including the number of disposals, proceeds, allowable costs, gains and losses. | Use totals calculated under HMRC’s matching rules across all taxable brokers. |
| SA108 boxes 31 to 38 | Unlisted shares and securities. | Review any relief, negligible-value claim or election separately. |
| SA108 boxes 14 to 22 | Other property, assets and gains that do not belong in a more specific section. | Use this route only after identifying the instrument and contract correctly. |
| SA109 | Residence information and claims under the 2025/26 FIG regime. | A FIG claim also needs corresponding entries on SA106 or SA108. |

Where the main 2025/26 investment figures belong

What happened to the 2024/25 Box 51 adjustment?

Your final 2025/26 investment filing check

Investment Self Assessment questions

Which investments and income go on your Self Assessment?

How do you report investments on your 2025/26 Self Assessment?

What should you check before submitting your investment return?

How to report investments on your 2025/26 UK Self Assessment

What actually happens on 28 October

On the lending and liquidity measure

What to do before, on, and after the day

Try it for free

What was announced, and what is still missing

Budget Day, 28 October: The Date the Crypto tax reliefs get their price tag

How are Saxo investments and derivatives taxed in the UK?

Saxo and UK tax: how to report shares, ETFs, CFDs and foreign income

How are IG shares, CFDs, spread bets and crypto taxed in the UK?

IG and UK tax: how to report shares, CFDs, spread bets and crypto

What Bitpanda file do you need for Finbooks?

Bitpanda and UK tax: how to report crypto, staking and Crypto Indices

What does paying the right amount of investment tax mean?

Are your capital gains calculated under HMRC rules?

How can you check your UK investment tax before filing?

How do I make sure I'm paying the right amount of tax on my UK investments?

Investment and cash protection are separate

| DEGIRO activity | What matters for UK tax | Where it is usually reported |
| --- | --- | --- |
| Share disposals | Capital gain or allowable loss calculated in GBP after HMRC pooling and matching. | SA108 where reporting is required. |
| ETF and fund disposals | Capital treatment can depend on UK reporting-fund status; a non-reporting offshore fund can produce an offshore income gain. | SA108 or the relevant income pages, depending on fund status. |
| UK dividends | Dividend income, including amounts reinvested or retained in the account. | The dividends section of SA100. |
| Foreign dividends | Normally declared gross before overseas withholding tax, with Foreign Tax Credit Relief considered separately. | Usually SA106. |
| Bond coupons and cash interest | Savings or foreign income rather than capital gains; the source and instrument determine the precise route. | SA100 or SA106, as applicable. |
| Options, futures and short positions | Treatment depends on the contract, how the position ended and whether the activity is investment or trade. | Commonly SA108 for ordinary investing, or the relevant income pages where another treatment applies. |

Typical UK tax treatment by DEGIRO activity

Do not collapse every derivative into one profit figure

A calendar-year report does not cover the UK tax year

How to import DEGIRO into Finbooks

DEGIRO UK tax questions

How are DEGIRO investments taxed in the UK?

DEGIRO and UK tax: how to report shares, ETFs and dividends

Freedom24 does not provide a UK Stocks & Shares ISA

Supervised run-off does not mean every existing account must be closed

This is not £85,000 of FSCS investment protection

| Freedom24 activity | Typical UK tax treatment | Usual reporting route |
|---|---|---|
| **Shares** | Capital gain or allowable loss on disposal, calculated in GBP under HMRC’s matching rules. | SA108 when reporting is required. |
| **ETFs** | Capital treatment may depend on UK reporting-fund status; non-reporting funds can produce offshore income gains. | SA108 or the relevant income pages. |
| **UK dividends** | Dividend income, kept separate from capital gains and losses. | Dividend section of SA100. |
| **Foreign dividends** | Reported gross before withholding tax, with Foreign Tax Credit Relief considered separately. | Usually SA106. |
| **Bond coupons and cash interest** | Savings or foreign income rather than capital gains. | SA100 or SA106, as applicable. |
| **Options, futures and structured products** | Capital treatment is common for individual investors, but the contract and pattern of activity can change the result. | SA108 or the relevant income pages. |

Typical UK tax treatment by Freedom24 activity

Check the exact fund and share class

One portfolio figure can contain several tax categories

How to import Freedom24 into Finbooks

Freedom24 UK tax questions

Freedom24 and UK tax: how to report shares, ETFs and foreign income

CryptoBooks becomes Finbooks: why we changed our name

Buying crypto with a credit card without KYC in the UK

CARF and crypto in the UK: what changes from 2026

UK crypto tax guide 2026: HMRC rules, CGT, Income Tax and Self Assessment

Finbooks Blog

The information on this website is provided for general informational purposes only. It should not be considered professional advice from Finbooks. Finbooks does not act as a financial adviser. You should seek independent legal, financial, tax, or other professional advice to determine how the information on this website applies to your specific circumstances. Finbooks is not responsible for any loss incurred, whether due to negligence or otherwise, arising from the use of, or reliance on, the information provided directly or indirectly through this website.

I agree to the processing of my data as described in the 

Insights and regulatory updates to help you stay compliant.

Tax updates for investors 📬

Die auf dieser Website enthaltenen Informationen dienen ausschließlich allgemeinen Informationszwecken und stellen keine professionelle Beratung durch Finbooks dar. Finbooks tritt nicht als Finanzberater auf. Es wird empfohlen, unabhängige rechtliche, finanzielle, steuerliche oder sonstige professionelle Beratung einzuholen, um zu beurteilen, wie die auf dieser Website bereitgestellten Informationen auf deine individuelle Situation anzuwenden sind. Finbooks übernimmt keine Haftung für Verluste, die aus Fahrlässigkeit oder aus anderen Gründen entstehen und direkt oder indirekt aus der Nutzung oder dem Vertrauen auf die bereitgestellten Informationen resultieren.

Die wichtigsten Steuer- und Regulierungsupdates direkt in dein Postfach.

Steuer-Updates für Investoren 📬

Du investierst. Wir übernehmen die Steuern.

Les informations contenues sur ce site sont fournies uniquement à titre d’information générale. Elles ne doivent pas être considérées comme un conseil professionnel de la part de Finbooks. Finbooks n’agit pas en tant que conseiller financier.
Il est recommandé de solliciter un conseil juridique, financier, fiscal ou tout autre conseil professionnel indépendant afin d’évaluer comment les informations présentées sur ce site s’appliquent à votre situation spécifique.
Finbooks ne pourra être tenu responsable de toute perte subie, résultant d’une négligence ou de toute autre cause, découlant de l’utilisation ou de la confiance accordée, directement ou indirectement, aux informations fournies via ce site.

Analyses et mises à jour réglementaires pour t’aider à rester en conformité fiscale.

L’adresse à laquelle tu recevras les e-mails.

Actualités fiscales pour les investisseurs 📬

Tu investis. À nous la fiscalité.

A informação contida neste website é fornecida apenas para fins informativos gerais. Não deve ser considerada aconselhamento profissional por parte da Finbooks. A Finbooks não atua como consultora financeira.
Deve procurar aconselhamento jurídico, financeiro, fiscal ou outro aconselhamento profissional independente para determinar de que forma a informação disponível neste website se aplica às suas circunstâncias específicas.
A Finbooks não se responsabiliza por quaisquer perdas incorridas, seja por negligência ou por qualquer outra causa, decorrentes da utilização ou da confiança depositada nas informações disponibilizadas, direta ou indiretamente, através deste website.

Análises e atualizações regulatórias para te ajudar a manter a conformidade fiscal.

Atualizações fiscais para investidores 📬

Tu investes. Nós tratamos da fiscalidade.

La información contenida en este sitio se proporciona únicamente con fines informativos generales. No debe considerarse asesoramiento profesional por parte de Finbooks. Finbooks no actúa como asesor financiero. Se recomienda solicitar asesoramiento legal, financiero, fiscal u otro asesoramiento profesional independiente para evaluar cómo la información presentada en este sitio se aplica a su situación específica. Finbooks no se hace responsable de ninguna pérdida sufrida, ya sea por negligencia u otras causas, que resulte del uso o de la confianza depositada, directa o indirectamente, en la información proporcionada a través de este sitio.

Análisis y actualizaciones regulatorias para ayudarte a mantener el cumplimiento fiscal.

La dirección en la que recibirás los correos electrónicos

Actualizaciones fiscales para inversores 📬

Tus inversiones. Nuestra fiscalidad.

Le informazioni contenute in questo sito sono fornite esclusivamente a scopo informativo generale. Non devono essere considerate consulenza professionale da parte di Finbooks. Finbooks non agisce in qualità di consulente finanziario. È opportuno richiedere consulenza legale, finanziaria, fiscale o professionale indipendente per valutare come le informazioni presenti su questo sito si applichino alla propria situazione specifica. Finbooks non è responsabile per eventuali perdite subite, derivanti da negligenza o da altre cause, che risultino dall’utilizzo o dall’affidamento sulle informazioni fornite, direttamente o indirettamente, tramite questo sito.

Approfondimenti e aggiornamenti normativi per aiutarti a restare conforme.

Aggiornamenti fiscali per investitori 📬

A te gli investimenti. A noi la fiscalità.

small_logo.png

thumbnail_logo.png

logo.png

Features

Integrations

Tax reports

Plans

Human Plans

Platform

Blog

Help Center

What's new

Resources

About Us

Contact us

Company

Terms of Use

Disclaimer

Cookie policy

Privacy policy

Legal

You invest. We handle the tax.

small_logo_black.png

thumbnail_logo_black.png

logo_black.png

small_logo-inv.png

thumbnail_logo-inv.png

logo-inv.png

small_logo-white.png

thumbnail_logo-white.png

logo-white.png

No card required. Try it out, then decide.

Kein Papierkram erforderlich. Probieren Sie es aus und entscheiden Sie dann.

Verbinden Sie {connectionName} und andere Verbindungen mit Finbooks

No se requiere tarjeta de crédito. Pruébalo primero y decide después.

Conecta {connectionName} y otras fuentes a Finbooks

Aucune carte requise. Essayez-le, puis décidez.

Connectez {connectionName} et d’autres connexions à Finbooks

No se requiere tarjeta. Pruébalo y decide después.

Liga {connectionName} e outras conexões ao Finbooks

Nessuna carta richiesta. Provalo e poi decidi.

Connetti {connectionName} e altre connessioni a Finbooks

thumbnail_badge.png

badge.png

Connect all your sources, download the data, optimise your investments, calculate taxes, and receive accurate reports.

Connect {connectionName} and other sources to Finbooks

: discover the reason behind our rebranding. 

Sidebar mockup of a Finbooks financial report showing capital gain, excluded transactions and HMRC tax rate summaries.

blog-report-sidebar-uk.png

Goodbye Excel 👋

No credit card required, try it and then decide

Smartphone showing an investment tax payment of €374.21, with the Italian labels "Pagamenti tasse", "Dichiarativi" and "Scadenze"