Guide on how to report Coinbase crypto taxes in United Kingdom?

Introduction

Are you confused about your Coinbase crypto taxes in the United Kingdom? Do you need to know what to declare? You are in the right place for clear, straightforward guidance.

Tax offices worldwide now get transaction data from crypto platforms. This data helps them confirm tax obligations.

Waltio makes this process simple. It calculates your crypto taxes. Waltio also helps you complete the correct forms. This ensures you meet United Kingdom tax rules.

This guide explains how to report your Coinbase activity to HMRC.

What is Coinbase?

Coinbase launched in 2012. It is a major cryptocurrency exchange. You can buy, sell, and trade digital assets there.

Coinbase operates in the United Kingdom through Coinbase UK. You should check Coinbase UK’s registration with the Financial Conduct Authority (FCA). This shows they meet local rules.

Local registration can affect data sharing by exchanges. However, it does not change your tax duties. You must still report your crypto activity in the United Kingdom. This is true whether Coinbase is registered or not.

How does the HMRC know I have crypto on Coinbase?

Global efforts have increased to make crypto transactions clear. New rules are improving transparency.

DAC8 regulations are now active across the EU. These rules boost international cooperation. As of January 1, 2026, Coinbase must report your transaction history. All other regulated platforms must do this too. They send this data directly to tax authorities.

Learn more about DAC8 and how it affects you

How are Coinbase transactions taxable in United Kingdom?

HMRC treats cryptoassets differently. It depends on your activity. Most individuals treat their crypto gains as capital gains.

A taxable event means you owe tax.

• Selling crypto for regular money, like GBP.
• Buying goods or services directly with crypto.

Exchanging one crypto for another may be a taxable event. Check the latest guidance from HMRC to confirm the taxability of crypto-to-crypto exchanges.

Profits from these events are “capital gains.” You pay Capital Gains Tax (CGT) on these gains.

Income Tax rates are 20% to 45%. Capital Gains Tax rates are 10% (Basic Rate) or 20% (Higher Rate). These rates apply to gains above the annual exempt amount. This amount is currently £3,000 per tax year.

If you trade crypto as a business, your tax status may differ. Check the latest HMRC guidance. This will confirm your specific tax position.

Comprehensive guide to crypto taxes in United Kingdom

How to calculate gains and losses of Coinbase?

For Capital Gains Tax, HMRC typically uses “Section 104 pooling.” This method averages the cost of identical cryptoassets you own.

You also use “share matching” rules. These rules apply to assets bought and sold quickly. This includes the “30-day rule.” It matches sales with purchases made within 30 days. This can be before or after the sale.

Let’s see a Section 104 pooling example.

• Scenario: You bought 1 BTC for £10,000 in 2018. You bought another 1 BTC for £30,000 in 2024. In 2025, you sold 1 BTC for £40,000.
• Result: Your “pool cost” for 2 BTC is £40,000 (£10,000 + £30,000). The average cost per BTC is £20,000. When you sell 1 BTC for £40,000, your taxable gain is £20,000. This is the sale price minus the average cost.

HMRC’s Cryptoasset Manual offers full details on these rules. Always check this manual for exact calculations.

How to declare staking & earn products from Coinbase?

The tax treatment of income from staking and earn products varies. You may need to declare this income for Income Tax purposes. Check the latest guidance from HMRC.

You must value these rewards in GBP. Use the Fair Market Value. This is the value at the exact time you receive them. For example, the cost basis for airdrops can vary. Check the latest guidance from HMRC.

Receiving a reward may be a tax event (e.g., Income Tax). Selling that reward later typically creates a second tax event, which may be subject to Capital Gains Tax. Check the latest guidance from HMRC.

How do I declare my gains and losses for Coinbase?

You declare your crypto gains and losses through your Self Assessment tax return. Most individuals use the SA100 form.

You must complete the SA108 form. This is the Capital Gains Summary section. Here, you report all your crypto disposals. Provide the total taxable gains and any allowed losses for the tax year.

How to Import Coinbase operations into Waltio?

Waltio helps you calculate your crypto taxes automatically. You can easily import your Coinbase transaction data. This prevents manual mistakes and saves a lot of time.

📝 Description

The Coinbase API allows you to connect your Coinbase account to Waltio to automatically import your deposits, withdrawals, trades, and balances.
👉 Please note that Coinbase and Coinbase Pro have different API processes. If you are looking to connect Coinbase Pro, click here.
👉 You can also connect via Coinbase Sync by following this article.

⚠️ Warnings

• Coinbase CONVERT transactions are considered tricky as they may create taxable events. Waltio does not consider them taxable by default.
• Transfers between internal accounts are not supported.
• Earnings from quizzes/questionnaires/tutorials are not taken into account and must be added manually using Waltio’s format file.

💡 Recommendations

• You can add multiple Coinbase APIs to Waltio.
• “Convert” type transactions appear as two transactions in Waltio.

📂 How to access your data

1. Log in to your Coinbase account.
2. Click on API Key Management, then Create API key.
   

📤 How to export your data

1. Configure the API key:
   • Set a nickname.
   • Choose Portfolio option: Default.
   • Click Create & download.
     
2. Copy your Coinbase API keys.
   

➕ How to add your data to Waltio

1. Go to the Connect my API page on Waltio.
2. Paste your Coinbase API keys.

Simplify your tax returns with Waltio

Waltio combines all your exchanges and wallets. This makes tax reporting easier. Connect your accounts using API or file upload. Track your crypto portfolio in real-time. Generate United Kingdom compliant tax reports in one click.

Create your free account today. No credit card or KYC is needed.