How to Reduce Your Tax Bill with Crypto Losses – Smart Strategies for 2025

Crypto investment is like a rollercoaster ride with good and bad days involved. With the crypto market struggling, you can claim crypto losses, but there is one upside: you can offset your taxes with crypto losses. By offsetting your capital losses against your capital gains, you can reduce your CGT liability for 2025.

This blog discusses the practical strategies, such as tax loss harvesting, Capital Gains Tax rules, and the claim of the losses in the UK. And if you’re asking yourself, ‘Can I offset crypto losses against tax?’. This blog has the answers.

Let’s get into it!

Reduce Tax Bill with Crypto Losses

Cryptocurrency markets are unstable, and downfalls are frequent. But do you realise that these losses can assist you in saving on taxes? In the UK, crypto is considered an asset under the Capital Gains Tax (CGT) regulations, and thus, you can use your losses to cut your tax bill. It is time to know how you will maximise your crypto losses in 2025.

1- Is it Tax-Allowed to Write off Crypto Losses?

In the UK, yes, crypto losses can be offset. Selling or disposing of crypto at a loss (for example, by selling Bitcoin for less than you paid for it) creates capital loss. This loss is deductible from capital gains on other assets, such as stocks, property, or even other crypto. When you experience more losses than gains, you have a way to carry forward the losses to future tax years to reduce your tax liability.

To illustrate, assuming that you have a £10,000 gain on Ethereum and that you made a £12,000 loss in another crypto, then you will be able to offset the entire £10,000 gain and no CGT is due this year. You can carry forward the balance of £2,000 loss.

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2- Do crypto losses reduce taxes?

Yes, crypto losses cut taxes. Every year, you have a tax-free allowance for your investment gains. For the 2025/26 tax year, this is £3,000. Any gains you make below this amount are completely tax-free.

When you sell crypto at a loss, you can use that loss to cancel out some of your gains. This helps you reduce the amount of tax you have to pay.

For example, imagine you sell one crypto and make a £15,000 profit. But you also sell another crypto and lose £5,000.

Your total gain is now only £10,000 (£15,000 profit minus the £5,000 loss).

Since you have that £3,000 tax-free allowance, you only pay tax on the remaining £7,000. It’s a straightforward way to directly lower your tax bill.

3- Can You Deduct Tax from Crypto Losses?

Yes, there is a provision for a deduction of crypto losses from capital gain tax, and not from other forms of income (like your salary). HMRC permits you to declare the losses on crypto on your Self-Assessment tax return. To claim them:  

• Document all your cryptocurrency trades, the price of purchase and sale, dates, and fees.  
• Determine your loss (difference between sale price and purchase price, as well as allowable expenses such as transaction fees).  
• Losses should be reported to HMRC even without any gains to counterbalance during the current year.  

Losses should always be reported, as they will enable you to carry forward the losses. In the UK, the deadline to claim a capital loss is four years after the end of the tax year in which the loss occurred. 

How Can I Reduce My Crypto Tax in the UK?

To minimise your tax in the UK on crypto, you should consider the following strategies:  

1. Use Your CGT Allowance: Time your crypto sales to fall below the £3,000 annual CGT allowance.  
2. Offset Losses: You can offset gains in other assets after selling crypto.
3. Gift to Spouse/Civil Partner: Transfer crypto to your spouse or civil partner to claim his/her CGT allowance or claim his/her gains. Transfers among spouses are free of tax.  
4. Spread Disposals: Sell crypto across several tax years to remain within the CGT allowance in each of them.  
5. Claim Allowable Costs: Subtract transaction fees, fuel fees, and other expenses in determining gains or losses.  

Accurate records should be maintained at all times, as HMRC might demand to see the proof of transactions.

How Do Capital Gains Tax Rules Apply to Crypto?

The HMRC in the UK regards crypto as an asset, therefore, the rules of Capital Gains tax apply in the event of:  

• Sell crypto for fiat (e.g., GBP).  
• Exchange one currency with another (e.g., Bitcoin with Ethereum).  
• Use cryptocurrency to purchase goods/services.  
• Gift crypto (except to a spouse / civil partner).  

To find out your CGT liability:  

• Calculate the total cost (what you paid for the crypto, including fees).  
• The difference between the sale price or market value at disposal and the cost is subtracted.  
• When the outcome is a gain, then add it to your cumulative gains in a given year. In case it is a loss, you may offset gains.  

As an illustration, when you acquired 1 BTC for £20,000 and sold it for £15,000, then you would have a loss of £5,000 to offset other gains.

What Is Tax Loss Harvesting?

Tax loss harvesting involves selling crypto at a loss to offset the tax bill with crypto losses. The idea is to realise the loss (officially sell it) to be able to offset it with gains. The Bed and Breakfast rule should be considered when tax loss harvesting is used. When you sell crypto at a loss and repurchase it in 30 days, the HMRC can consider that the two transactions are linked and you are not allowed to claim the loss. 

To avoid this:  

• Do not buy the same crypto within a 30-day time frame.  
• Buy yet another crypto (e.g., sell Bitcoin, buy Ethereum) to stay in the market.  

For example:  

You have a crypto value of £5,000, which you purchased for £10,000. The sale of it would be a £5,000 loss that can be balanced out by a £5,000 gain elsewhere.  This decreases your taxable profits, decreasing your CGT bill. Then you can reinvest in the same or similar crypto, however, be aware of the UK rule of Bed and Breakfasting.

Crypto Tax in the UK Explained here. How it works and what you need to pay?

How to Realise and Claim a Capital Loss on Your Crypto?

To receive and deduct a capital loss on your crypto: 

• Sell or dispose of the crypto: when sold at a loss, it is realised against tax. Exchanging one crypto with another or even gifting it (without a spouse) also matters.  
• Calculation of Loss: The difference between the cost (the purchase price plus fees) and the sale price.
• Report to HMRC: Enter loss in the Capital gains section of your Self-Assessment tax return. You are required to report losses in a period of four years after the termination of the tax year during which the losses were incurred.  
• Record Keeping: Have a record of your transactions in terms of dates, prices, and the addresses of your wallets because the HMRC can audit your claims.  

To illustrate, when you purchased 10 ETH at £20,000 and sold it at £12,000, then you would claim a loss of £8,000.

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Can NFTs be Used for Tax Loss Harvesting?

Yes, NFTs can be used for tax loss harvesting in the UK. In most cases, HMRC treats NFTs as cryptoassets subject to CGT, so if you sell an NFT for less than you paid, you can usually offset the loss against other capital gains.  In case you sell an NFT below what you paid, you will be able to deduct the loss against the gains. For instance:  

You purchased an NFT at £3,000 and sold it at £1,000. This is a £2,000 capital loss. Calculate this to compensate for profits of other crypto or other assets to decrease your tax payment. But you must have clear documentation of NFT transactions, which are unique and thus may be hard to calculate.

Can you Claim a Loss for Lost or Stolen Crypto?

In most instances, you cannot claim a loss of lost or stolen crypto. Theft or loss (e.g., loss of possession of your personal keys) is not regarded by HMRC as a disposal for CGT purposes. Don’t worry, exceptions are there.

In case your crypto is saved in a hacked exchange and proclaimed unrecoverable, you can make a “negligible value claim”. This is to prove to HMRC that the asset is of no more value, and you would claim a loss without the sale.  

It is not that simple, and these claims need evidence; therefore, seek the advice of a tax expert.

How to Calculate Your Capital Gains Tax Liability?

To calculate your Capital Gains Tax (CGT) liability on crypto, follow these steps:

1. List All Disposals: Make a list of all sales, trades, and other disposals of crypto that took place in the tax year (6 April 2025 to 5 April 2026).
2. Calculate Gains/Losses: For each disposal, subtract the cost (the purchase price and associated fees) from the sale price or market value at the time of disposal.
3. Use HMRC Matching Rules: To determine the correct cost for each disposal, you must apply HMRC’s matching rules in this order:
   1. Same-Day Rule: Match disposals against any identical crypto acquired on the same day.
   2. Bed and Breakfasting Rule: Match any remaining disposals against identical crypto acquired in the 30 days after the disposal.
   3. Section 104 Pool: Match any disposals not covered by the first two rules against the pooled assets, which uses an average cost method.
4. Offset Losses: Deduct your total crypto losses from your total gains to determine your net gain or loss for the year.
5. Use CGT Allowance: Deduct the £3,000 annual exempt allowance from your net gains.
6. Apply Tax Rates: Any gains that remain above the allowance are subject to tax. For the 2025/26 tax year, the rates for crypto gains are 18% for basic rate taxpayers and 24% for higher/additional rate taxpayers, depending on your total income. 

For example:

• Total crypto gains: £20,000
• Crypto losses: £5,000
• Net gains: £15,000 (£20,000 – £5,000)
• After £3,000 allowance: £12,000 taxable (£15,000 – £3,000)
• CGT: £12,000 x 24% = £2,880 if you are a higher-rate taxpayer. 

The Bottom Line

Cryptocurrency losses can help reduce your tax bill in 2025. You can reduce your tax liability to a great extent by knowing the Capital Gains Tax, taking advantage of tax loss harvesting, and claiming your losses appropriately. Whatever it is, offsetting gains, bringing forward losses, or utilising your CGT allowance, these strategies can help you save. 

Also, maintain all sorts of records and seek professional guidance to comply with the HMRC regulations. 

Disclaimer: The information provided on AccountingFirms.co.uk is for informational purposes only and should not be considered as financial advice. Always consult with a professional accountant to ensure compliance with UK laws and regulations.