Sustainability is no longer a nice-to-have – it’s a business imperative. Customers, employees, and investors increasingly expect companies to take responsibility for their environmental and social impact. Yet when it comes to the supply chain, good intentions often meet complex realities. How can you ensure your suppliers align with your sustainability goals without setting demands they can’t meet? Here’s a guide to setting realistic, measurable, and constructive requirements for your suppliers.

Start by Understanding Your Supply Chain

Before you can set expectations, you need to understand who’s in your supply chain. Many UK businesses have a clear view of their direct suppliers but far less insight into the subcontractors providing raw materials, packaging, or logistics services.

Begin by mapping your supply chain and identifying where your suppliers are located. This helps you pinpoint where environmental or social risks are highest – and where to focus your efforts first.

A useful approach is to categorise your suppliers:

• Core suppliers – those you work closely with and can influence directly.
• Secondary suppliers – those with less direct contact but still within your sphere of influence.
• Occasional or low-risk suppliers – where a simple sustainability policy or declaration may suffice.

Set Clear and Achievable Goals

Sustainability goals should be ambitious but attainable. If you set unrealistic demands, you risk losing valuable partners or collecting unreliable data.

Start by defining what sustainability means for your business. Is your focus on carbon reduction, ethical labour practices, waste minimisation, or resource efficiency? Choose a few key areas and set measurable targets that can be tracked over time.

Examples of realistic supplier requirements include:

• Providing data on energy use and carbon emissions.
• Having a plan to reduce packaging waste or improve recycling rates.
• Ensuring working conditions meet International Labour Organization (ILO) standards.

The key is to make your requirements specific, understandable, and proportionate to the supplier’s size and role in your supply chain.

Make Collaboration Part of the Solution

Sustainability in the supply chain isn’t just about compliance – it’s about collaboration. Many suppliers want to improve but may lack the knowledge, resources, or incentives to do so.

Invite your suppliers into the process. Share your goals and ask how they can contribute. You may discover joint opportunities to reduce environmental impact and cut costs – for example, by optimising transport routes, reusing packaging, or developing lower-carbon materials.

Consider offering support through training sessions, shared projects, or access to tools and data. This approach shows that you view suppliers as partners in progress, not just entities to be monitored.

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Documentation and Follow-Up – Without the Red Tape

To ensure your requirements are met, you’ll need some form of documentation. But this doesn’t have to be overly bureaucratic.

Start with a supplier code of conduct or declaration confirming compliance with your basic sustainability standards. For key suppliers, you can add audits, questionnaires, or third-party certifications such as ISO 14001, Fairtrade, or B Corp accreditation.

Establish a follow-up plan – perhaps annually or biennially – and recognise that sustainability is a journey. The goal is continuous improvement, not perfection from day one.

Prioritise Transparency and Communication

Consumers and business partners increasingly expect transparency about where products come from and how they’re made. Communicating openly about your supply chain efforts – including both successes and challenges – builds trust and credibility.

Share stories about suppliers who have made progress or projects that have led to tangible improvements. This demonstrates that sustainability is not just a marketing term but an integral part of your company’s culture and operations.

Think Long-Term – and Be Patient

Building a sustainable supply chain takes time. It requires trust, dialogue, and a shared understanding that change happens gradually. Some suppliers will be further along than others, and that’s okay.

What matters most is maintaining direction and using collaboration as a driver for improvement. When you set realistic requirements and follow up with support and open communication, sustainability becomes not a burden – but a shared investment in a better future.