How much capital gains tax do I pay in the UK?

For disposals of shares, funds, and ETFs in 2026/27, taxable gains are generally charged at 18% to the extent they fall within the unused basic-rate band and 24% above it. The individual annual exempt amount is £3,000.

What is the capital gains tax allowance for 2026/27?

The individual annual exempt amount for the 2026/27 tax year is £3,000. It was £6,000 in 2023/24 and £12,300 in 2022/23.

How does the 30-day bed and breakfast rule work?

If you sell shares and repurchase shares of the same type within 30 days, the sale is matched with the subsequent purchase for CGT purposes. This anti-avoidance rule prevents investors from selling to realise a loss and immediately rebuying. FiscalFox applies this rule automatically.

Do I need to file SA108 for capital gains?

If you are registered for Self Assessment, you generally need to report gains when taxable gains exceed the annual exempt amount, when total disposal proceeds exceed £50,000 for 2023/24 onwards, or when you need to claim allowable losses or make another capital gains claim.

What does FiscalFox calculate for UK shares?

FiscalFox is a specialist UK capital gains tax calculator for share investors. It applies same-day matching, the 30-day bed and breakfast rule, and Section 104 pooling, then generates SA108-ready supporting reports. It has 13 built-in imports: Vanguard, Hargreaves Lansdown, Freetrade, Trading 212, eToro, InvestEngine, Moneybox, Saxo Bank, Interactive Brokers, Robinhood, Revolut, AJ Bell, and IG.

How do I report share sales to HMRC?

Share sales are reported on the SA108 supplementary pages of your Self Assessment tax return. You need to calculate the gain or loss on each disposal using HMRC's share matching rules, then enter the totals on SA108. The deadline is 31 January following the end of the tax year. FiscalFox can generate the SA108 schedules automatically from your broker export files.

Do I need to pay capital gains tax if my gains are under GBP 3,000?

If your total taxable gains are under the annual exempt amount, you do not owe CGT on those gains. If you are registered for Self Assessment, you may still need to report when total disposal proceeds exceed GBP 50,000 for 2023/24 onwards, or to claim allowable losses.

How do I calculate capital gains on shares?

Capital gains on shares are calculated as disposal proceeds minus allowable costs. HMRC requires same-day matching first, then acquisitions in the following 30 days, then Section 104 pooling. FiscalFox automates imported transaction matching and the current-year estimate. A brought-forward capital-loss balance must currently be applied separately.

What is the Section 104 pooling rule?

The Section 104 pool is a running average cost calculation for shares of the same type. When you buy shares, the cost is added to the pool. When you sell shares not matched by the same-day or 30-day rules, the cost is calculated as a proportion of the total pool cost based on the number of shares sold.

What are the current UK CGT rates?

From 30 October 2024: 18% for basic rate taxpayers and 24% for higher/additional rate taxpayers on shares and other assets. Before 30 October 2024: 10% and 20% respectively. Residential property has different rates.

What is the same-day rule for capital gains?

The same-day rule requires that if you sell shares and buy shares of the same type on the same day, the sale is matched with the same-day purchase for CGT purposes, regardless of the order of transactions during the day.

Can I carry forward capital losses?

Yes. If your capital losses exceed your capital gains in a tax year, you can carry forward the excess losses to offset against future capital gains indefinitely. You must report the losses to HMRC within 4 years of the end of the tax year in which they arose.

Is it really free to start?

Yes. Capital gains calculations are completely free, including calculations across multiple broker files. The one-time £29.99 payment is only needed to download the HMRC report pack, and unlocks the selected tax year plus earlier years in the calculation. There is no subscription.

Do you support my broker?

FiscalFox has 13 built-in broker imports: Vanguard, Hargreaves Lansdown, Freetrade, Trading 212, eToro, InvestEngine, Moneybox, Saxo Bank, Interactive Brokers, Robinhood, Revolut, AJ Bell, and IG. Other supported transaction files can use the opt-in AI import path after sign-in and consent.

Does FiscalFox apply HMRC share matching rules and protect data?

FiscalFox applies same-day, following-30-day and Section 104 matching in HMRC's prescribed order. Built-in broker parsing runs in the browser where possible; signed-in storage and opt-in AI parsing are described in the privacy policy. FiscalFox is a calculation tool, not tax advice or an HMRC submission.

When did CGT rates change in the UK?

The most recent change was on 30 October 2024, when the Autumn Budget increased CGT rates on shares from 10%/20% to 18%/24%. The annual exempt amount was reduced from £12,300 to £6,000 in April 2023, and further reduced to £3,000 in April 2024.

How do I know FiscalFox's calculations are correct?

FiscalFox applies the exact same share-matching rules HMRC uses to verify Self Assessment returns: same-day matching, 30-day bed and breakfast rules, and Section 104 pooling, in the correct priority order. Every disposal is traced and the calculations are defensible if you are ever questioned.

When do I need to pay for the report pack?

The free tier lets you calculate and view your capital gains on-screen. Pay £29.99 only when you want the downloadable HMRC-ready PDF and CSV report pack. The payment unlocks the selected tax year and every earlier year contained in the calculation.

Is there a subscription?

No. The report pack is a one-time £29.99 payment with no recurring charge. You can download the unlocked reports again whenever you need them.

What happens if my capital gains are wrong on my tax return?

If HMRC finds an error in your Self Assessment, you pay the extra tax plus interest, and a careless mistake can carry a penalty of up to 30% of the underpaid tax. Most DIY errors come from missing the same-day and 30-day matching rules. FiscalFox applies them automatically and keeps the workings behind every disposal so you can evidence your figures.

Which Hargreaves Lansdown files do I need for FiscalFox?

For CGT, download your HL Capital Account CSV for buy and sell transactions. If you also want income context in your report, download the Income CSV and upload both files together.

Do I enter my HL tax certificate figures on SA108?

Not for the share and fund CGT computation by itself. SA108 needs disposal proceeds, allowable costs, gains, losses, and supporting computations. The HL tax certificate can still be useful for income sections of Self Assessment.

Can I use the gain shown by Hargreaves Lansdown for HMRC?

A platform gain or performance figure is not always the HMRC capital gains figure. UK CGT needs same-day matching, the 30-day rule, Section 104 pooling, allowable costs, and any relevant history across taxable holdings.

What if I transferred holdings into or out of Hargreaves Lansdown?

Transfers can make the calculation harder because the HL export may not include the original acquisition history. You should keep records from the old broker or registrar so the Section 104 pool can be calculated correctly.

Hargreaves Lansdown CGT Calculator

If you sold shares, funds, or ETFs in an HL Fund and Share Account, FiscalFox can calculate the UK capital gains from your transaction history. Start with the Capital Account Transaction Summary CSV. It contains the dated buys, sells, fees, and proceeds needed for HMRC share matching.

The HL file you need for CGT

Required: Capital Account Transaction Summary CSV. The Income CSV is optional and adds dividend information; it does not replace the Capital Account trade history.

Do not upload Portfolio Summary, valuation, tax certificate, PDF, or Excel files for CGT trades.
Use enough Capital Account history to cover the original purchases behind shares you sold.
Keep the tax certificate for income-tax records and cross-checking.

Official context: GOV.UK publishes the SA108 capital gains summary and HMRC's HS284 shares and CGT helpsheet.

Why your HL tax certificate does not solve CGT

The Hargreaves Lansdown tax certificate is mainly an income document. It helps with dividends, interest, and other income entries for Self Assessment, but it is not the same as a full capital gains computation for listed shares, funds, and ETFs.

For CGT you need the disposal proceeds, allowable acquisition costs, dealing costs, and the UK share matching rules applied in the right order. That means the same-day rule, the 30-day rule, and the Section 104 pool before you copy figures into the SA108 capital gains pages.

Quick FAQ for HL investors

Does HL tax certificate include CGT?

Usually no. Treat it as an income-tax document, not as the complete CGT computation for your Fund and Share Account.

What do I need instead?

Download the Capital Account CSV so each taxable disposal can be matched to the correct acquisition cost. If you want income context in the FiscalFox report, download the Income CSV as well.

When does SA108 come in?

SA108 is the capital gains summary that sits behind Self Assessment. Enter SA108 figures after your HL transactions have been matched and summarised, not by copying a portfolio gain or income certificate.

How to download your Hargreaves Lansdown transaction history

The CGT calculation requires one download: the Capital Account Transaction Summary CSV. HL also offers a separate Income CSV for dividends and interest, but that file is optional and cannot replace the Capital Account trade history.

One required file, one optional file

Required for CGT: Capital Account Transaction Summary CSV. Optional for income context: Income CSV. Upload both only if you want dividend and interest information alongside the capital gains calculation.

Capital Account download — required for CGT

Log in to your Hargreaves Lansdown account at hl.co.uk.
Select your Fund and Share Account, then open Transaction History.
Choose Capital Account, not Income, Portfolio Summary, or valuation.
Set the date range from your earliest relevant purchase through to 5 April of the tax year you are calculating.
Download the file titled Transaction Summary in CSV format.

Income download — optional

Return to your Fund and Share Account overview.
Click on Income (sometimes listed under the account sub-menu or as "Loyalty Bonus / Income").
Set the same date range as above.
Click Download CSV to export your dividend and income data.
Save the .csv file to your computer.

Once you have the Capital Account CSV, open the FiscalFox calculator with Hargreaves Lansdown already selected and upload it. Add the Income CSV only if you want FiscalFox to include dividends and interest in the summary.

Have the Capital Account CSV?

HL will already be selected. Upload the file and review your calculation for free.

File format details

Hargreaves Lansdown exports transaction data as CSV (comma-separated values) files. The Capital Account CSV typically contains:

Trade Date -- the date the deal was executed
Settlement Date -- the date the transaction settled
Reference -- HL's internal deal reference number
Transaction Type -- described as "Deal" for buy/sell transactions
Description -- details of the stock or fund, including buy/sell direction
Units/Shares -- the quantity traded
Price -- the execution price per unit
Value -- the total transaction amount in GBP
Charges -- dealing fees and stamp duty where applicable

The Income CSV contains dividend payments, loyalty bonus credits, and interest. FiscalFox uses this to provide a complete picture of your investment activity, though dividends are reported separately under income tax rather than CGT.

How FiscalFox processes your HL data

When you upload your Hargreaves Lansdown files, FiscalFox applies the full set of HMRC share matching rules in the legally required order:

Same-day rule -- shares sold on the same day as a purchase of the same security are matched first. The actual cost from that same-day acquisition is used to calculate the gain.
30-day bed and breakfast rule -- if you sell a holding and repurchase the same security within the following 30 days, the disposal is matched against that repurchase. This prevents the artificial crystallisation of losses.
Section 104 pool -- any remaining shares sold are matched against the pooled average cost basis, which FiscalFox calculates and maintains from your full transaction history.

FiscalFox combines data from both the Capital Account and Income CSV files into a unified timeline. The output includes a detailed disposal-by-disposal breakdown, the matching rule applied to each sale, and a summary of total gains, losses, and the resulting CGT liability for the tax year.

Common issues with Hargreaves Lansdown files

The Income file is optional for CGT

The Capital Account CSV is enough to calculate capital gains from HL trades. The Income CSV adds dividends and interest to the wider summary, but uploading it by itself will not provide the buy and sell rows needed for CGT.

Portfolio Summary is not transaction history

Portfolio Summary, holdings, and valuation exports show what you own at a point in time. They do not contain the dated Capital Account buys and sells needed for same-day matching, the 30-day rule, and the Section 104 pool. Return to Transaction History and download the Capital Account Transaction Summary CSV instead.

HL uses "Deal" terminology

Hargreaves Lansdown labels buy and sell transactions as "Deals" rather than using the more common "Buy" or "Sell" labels. The direction (buy or sell) is typically embedded in the description field. FiscalFox parses this automatically and correctly identifies the transaction direction, so no manual editing of the CSV is required.

Multiple account types

If you hold investments in both an ISA and a Fund and Share Account with HL, make sure you download data only from the Fund and Share Account. ISA transactions are not subject to CGT. HL keeps these accounts separate in its interface, so selecting the correct account before downloading should prevent any mix-up.

Accumulation funds and ERI

Some funds and ETFs can also create income-tax reporting work, especially offshore reporting funds with excess reportable income. ERI is separate from the CGT disposal calculation, but amounts already taxed as income may affect your CGT base cost. See the ERI guide if your HL holdings include accumulation ETFs or offshore reporting funds outside an ISA or SIPP.

Supported transaction types

FiscalFox extracts and processes the following transaction types from your Hargreaves Lansdown files:

Transaction Type	How FiscalFox Uses It
Buy (Deal)	Added to the Section 104 pool for the relevant security
Sell (Deal)	Matched against acquisitions using HMRC rules to calculate gain or loss
Dividend	Recorded for reference (taxed under income tax, not CGT)
Loyalty Bonus	Recorded for reference as additional income
Charges/Fees	Included as allowable costs that reduce your taxable gain on disposals

Hargreaves Lansdown is one of the most commonly used brokers by FiscalFox users. If you encounter any unusual transaction types or formatting issues in your HL files, please contact our support team and we will help resolve the issue.

Hargreaves Lansdown Capital Gains Tax Calculator