
Before diving into e-commerce specific requirements, ensure you meet all general UK website legal requirements:
See my companion guide: UK Website Legal Requirements: Your 2025 Compliance Guide for complete details on these foundation requirements.
When selling online, your Terms and Conditions need additional protections and disclosures.
Essential additions for e-commerce:
Consumer sales (B2C): You cannot override consumers' statutory rights, but you can clarify your processes and set reasonable additional terms.
Business sales (B2B): More flexibility in terms, but they must still be fair and clearly written.
Legal requirements: Enhanced T&Cs for e-commerce are governed by:
Penalties: Unfair terms are not binding on consumers. Misleading practices can result in enforcement action and unlimited fines.
References: Consumer Rights Act 2015, Consumer Contracts Regulations 2013, GOV.UK: Online and distance selling for businesses
UK VAT Registration: Required if your annual turnover exceeds £90,000. Optional below this threshold.
What VAT registration means:
Selling to EU customers:
Northern Ireland: Special rules apply for EU sales due to the Northern Ireland Protocol. Check current requirements.
Legal framework: VAT requirements are set by:

References: VAT Act 1994, HMRC VAT guidance
PCI DSS Compliance: If you process, store, or transmit credit card data, you must comply with PCI DSS 4.0.1 standards.
Common Payment Processors and Shared Responsibility: Most e-commerce businesses use third-party payment processors like:
Your Responsibilities vs Payment Processor Responsibilities:
What your payment processor handles:
What you're still responsible for:
Integration Method Affects Your Responsibilities:
Requirements:
Strong Customer Authentication (SCA): Most online card payments need two-factor authentication under PSD2 rules. Your payment processor typically handles this, but you need to ensure your checkout process supports it.
Card surcharges: You cannot charge extra fees for customers paying by card.
Legal framework: Payment security is governed by:
Penalties: Under PSD2: unlimited fines for serious breaches. Card scheme penalties for PCI DSS non-compliance can include increased transaction fees and termination of processing rights. Payment processors may suspend your account for non-compliance.
References: Payment Services Regulations 2017, FCA Strong Customer Authentication guidance, UK Finance PSD2 guidance
This legislation took effect in April 2025 and introduced the strictest e-commerce rules yet.
What's now banned:
New requirements:
Green Claims Code - Key Requirements: The CMA estimates that 40% of green claims made online could be misleading. All environmental claims must be:
Common greenwashing violations to avoid:
Legal framework: The DMCCA 2024 amends existing consumer protection laws:
The penalties: Up to 10% of global annual turnover OR £300,000 (whichever is higher). The Competition and Markets Authority (CMA) can now impose fines directly.
Honest, transparent practices build lasting customer relationships. Clear information reduces support queries and returns. Authentic reviews create genuine value for future customers.References: Digital Markets, Competition and Consumers Act 2024, CMA Green Claims Code
This new law affects how online marketplaces handle product safety.
If you sell via Amazon, Etsy, or other marketplaces:
What this means:
Direct selling: If you sell directly from your website, you remain fully responsible for product safety and compliance.
Legal framework:
Penalties: Enforcement orders, unlimited fines, and potential criminal prosecution for serious safety breaches. Enhanced powers allow authorities to force product recalls and marketplace suspensions.
References: Product Regulation and Metrology Act 2025, Consumer Protection Act 1987
