Understanding Capital Gains

Understanding capital gains is crucial for business owners and investors, as it determines the tax you pay when selling assets for a profit. This guide breaks down the key concepts and rules to help you manage your liabilities effectively.

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How Capital Gains Tax Works

Capital gains tax is charged on the profit you make when you sell or dispose of an asset that has increased in value. The tax applies to assets like property, shares, or business assets, not your regular income.

The tax is calculated on the difference between your purchase price and sale price, with different rates for basic and higher rate taxpayers. There are annual allowances and reliefs that can reduce or eliminate your tax bill.

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Key Rules and Allowances for Capital Gains

Here are the essential rules and allowances you need to know about capital gains tax in the UK:

Annual exemption: For the 2025/26 tax year, you have a tax-free allowance of £6,000 for capital gains.
Tax rates: Basic rate taxpayers pay 10% on gains (18% for residential property), while higher rate payers pay 20% (24% for residential property).
Assets subject to CGT: Includes second properties, shares, business assets, and certain valuables like art or antiques.
Main residence relief: Your primary home is usually exempt from capital gains tax when sold.
Business asset disposal relief: Offers a reduced 10% rate on qualifying business asset sales, with a lifetime limit of £1 million.
Gifting assets: Gifting can trigger CGT, but transfers between spouses or civil partners are tax-free.
Losses: Capital losses can offset gains in the same tax year or be carried forward to future years.
Reporting requirements: Gains above the annual exemption must be reported to HMRC via Self Assessment.
Deadlines: Tax on capital gains is due by 31 January following the end of the tax year.
Exempt assets: Assets like ISAs, pensions, and personal cars are generally exempt from capital gains tax.

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Common Mistakes and When to Seek Help

A common mistake is failing to keep accurate records of purchase and sale prices, leading to incorrect tax calculations. Overlooking reliefs like the annual exemption or business asset disposal relief can also increase your tax bill.

If you have complex transactions, such as selling multiple assets or dealing with property investments, consulting a professional ensures compliance and maximizes savings. Supreme Consulting Ltd offers fixed-fee advice to help you navigate capital gains tax with confidence.

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