How to Calculate Capital Gains Tax

When selling assets such as funds, shares, or property, it’s essential to calculate whether you owe Capital Gains Tax (CGT). Here’s a detailed guide on how to determine your CGT liability, including key considerations and examples.

Understanding Who Pays Capital Gains Tax (CGT)

Capital Gains Tax (CGT) applies to various individuals and entities, with specific rules governing its application. Here's a breakdown of who is subject to CGT and the nuances for different types of taxpayers.

Who Pays Capital Gains Tax?

  1. Private Individuals: Individuals who sell personal assets that have increased in value may be liable for CGT.

  2. Self-Employed Sole Traders: Sole traders must pay CGT on the sale of business assets.

  3. Partners in Business Partnerships: Partners must pay CGT on their share of gains from partnership assets.

  4. Company Owners: Owners may owe CGT on the personal profit from selling all or part of their company.

  5. Trustees: Trustees managing trust assets must pay CGT on gains from these assets.

  6. Personal Representatives of Deceased Persons: Representatives handling the estate of a deceased person must pay CGT on any gains from the sale of the deceased’s assets.

Subtracting Acquisition and Disposal Costs

When calculating a capital gain, you can subtract certain costs from the sale proceeds. These include:

  • Acquisition costs (purchase price)

  • Disposal costs (selling fees)

  • Trading charges

  • Stamp duty

  • Fees for intermediaries (e.g., IPO fees)

Offsetting CGT against Allowances and Losses

You can offset your CGT liability by using:

  • Annual Allowance: Each individual has an annual CGT allowance (£3,000 for the 2024/25 tax year).

  • Losses: Losses from other investments can be used to reduce your taxable gains.

Reporting Gains on UK Residential Property

For UK residential property sold after October 2021, you must report the gain to HMRC within 60 days of the sale.

Investments in General Investment Accounts

If you have used up your ISA and pension allowances and invest in a general investment account, any gains from the securities within this account may be subject to CGT upon sale.

Calculating CGT on Funds and Shares

To determine if you owe CGT on securities like funds or shares, follow these steps:

  1. Check for Gains: Determine if your investment has appreciated since purchase.

  2. Average Acquisition Cost: If you made multiple purchases, calculate the average purchase price.

Example Calculation: HSBC Shares

  • Purchases:

    • 1,000 shares at £1 per share

    • 1,000 shares at £2 per share

    • 1,000 shares at £3 per share

  • Average Cost: (£1 + £2 + £3) / 3 = £2 per share

  • Total Cost for 3,000 Shares: 3,000 shares x £2 = £6,000

Potential Gain Calculation:

  • Current Value: £10,000

  • Gain: £10,000 - £6,000 = £4,000 (if sold entire holding)

  • Taxable Gain: £2,000 (if sold half the holding)

Deductible Costs

You can deduct specific costs associated with buying and selling, such as:

  • Trading charges

  • Stamp duty

  • Intermediary fees (e.g., IPO fees)

However, you cannot deduct ongoing fund charges and platform fees.

Example: Accumulation Units

When selling accumulation units (where income is reinvested into the fund):

  • Example:

    • Purchase Fund for £10,000

    • Receive £2,000 of accumulated income

    • Sell for £20,000

    • Capital Gain: £20,000 - (£10,000 initial investment + £2,000 accumulated income) = £8,000

Important Considerations

  1. Report Gains and Pay CGT: Ensure you report any taxable gains and pay the CGT owed.

  2. Use Investment Platform Statements: These often provide helpful cost information for calculating gains.

  3. Keep Accurate Records: Maintain records of all purchases, sales, and associated costs to accurately calculate gains.

Summary

Calculating CGT involves determining the gain from the sale of an asset, subtracting allowable costs, and considering your annual allowance and any losses. Always ensure timely reporting of gains, especially for UK residential property, and use available resources like investment platform statements to simplify the process.

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