There’s a lot of hype around crypto cashback cards right now — earn BTC or other tokens just for spending.

But before jumping in, it’s worth understanding how they actually work… especially from a tax point of view.

How they work

• You top up the card (usually with GBP or crypto)
• Spend like a normal debit card
• Earn cashback paid in crypto

 

Why people like them

• Passive way to build a crypto position
• No need to actively invest
• Rewards can add up over time

 

The tax reality (UK)

• Cashback is usually treated as a rebate/discount → so not taxed when you receive it
• But when you later sell or swap that crypto: → it becomes a Capital Gains Tax (CGT) event

 

What people miss

• You still need to track the value at the time you receive each reward
• Small amounts add up quickly over a year
• If the value grows, you’ll have a gain when you dispose of it

 

Example

Earn £100 in crypto cashback → it grows to £300 → you sell
You’re taxed on the £200 gain  

Bottom line

Crypto cashback cards can be a nice extra… but they’re not tax-free.

It’s more like tax-delayed rewards, and without good tracking, they can turn into a surprise CGT bill later.

 

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If you’re sitting on unrealised losses… this is where you can actually turn them into something useful

What is it?
Selling crypto at a loss to reduce your Capital Gains Tax (CGT) bill.
Losses offset gains.
Less gains = less tax. -Unused losses can be carried forward.

Where it gets smart

This works best on assets you don’t believe will recover….
Coins that have already lost most of their value.
Projects you’ve lost confidence in.
Bags you’re realistically just “holding and hoping”

Instead of waiting… you can realise the loss and make it work for you

BUT… UK rules matter

The bed & breakfast rule (30-day rule):
Sell and rebuy the same asset within 30 days.
❌ HMRC denies the loss benefit

Smarter approaches.
✔️ Wait 30+ days before buying back.
✔️ Or switch into a different asset (e.g. BTC → ETH).
✔️ Or use a spouse strategy (if appropriate)