How to comply with weights and measures

If your business sells any products by weight – from loose sweets in a jar to cheese from a deli counter – you are legally required to use scales that are ‘trade approved’. This is a non-negotiable rule to ensure your customers get exactly what they pay for. Your local council’s Trading Standards service enforces these regulations, so getting it right from the start is essential to operate legally and build customer trust.

What are ‘trade approved’ scales?

You can’t just use any set of scales from your kitchen at home. ‘Trade approved’ (also called ‘legal for trade’) scales have been designed, tested, and certified to a specific government standard of accuracy and reliability for commercial use. When you buy them, they will have specific markings to prove this, including a green sticker with a crown on it and a black 'M' symbol on a silver background.

Using non-approved scales for selling goods by weight is illegal and can lead to serious penalties.

How to ensure you are compliant

Following the rules is straightforward. Here are the key steps to take:

1. Buy the right equipment: Purchase your scales from a reputable supplier of commercial equipment. Always check that the product description explicitly states they are ‘trade approved’ or ‘legal for trade’. Keep the receipt and any documentation that comes with them.
2. Use them correctly: Your scales must be positioned on a firm, level surface away from anything that could affect their accuracy, like vibrations from a fridge. Ensure the display is clear and not obstructed. It’s good practice to position the scales so the customer can see the weight reading.
3. Keep them accurate: You are responsible for ensuring your scales remain accurate at all times. While there isn’t a mandatory schedule for recalibration, Trading Standards officers can visit your premises at any time to test your equipment. If they find your scales are inaccurate, they can take enforcement action.

Why compliance matters

Trading Standards officers work to ensure a fair and safe trading environment for everyone. They can make unannounced visits to businesses to inspect equipment and check procedures. If you are found to be non-compliant, they could issue a warning, seize the equipment, or even prosecute you, leading to a fine and a criminal record. More importantly, using accurate, approved scales builds trust and shows your customers that you are a professional and honest business.

Top Tip: Make sure any staff who will be using the scales are trained on how to operate them correctly, including how to use the ‘tare’ function to remove the weight of any packaging or containers.