What is the Peatland Code?

Quick Answer: The Peatland Code is a voluntary certification standard for peatland carbon projects in the UK, managed by the IUCN UK Peatland Programme. It sets the methodology and eligibility criteria for measuring, verifying, and issuing carbon credits from peatland restoration projects. The UK Land Carbon Registry trades credits generated under the Code, and market participants recognise them as some of the most valuable nature-based carbon credits in the voluntary carbon market.

What is the Peatland Code?

The Peatland Code is the UK's voluntary standard for generating verified carbon credits from the restoration of degraded peatlands. Administered by the IUCN UK Peatland Programme, it provides a structured methodology for quantifying the greenhouse gas emissions avoided when damaged peatland is restored to a healthy, waterlogged state.

The Code sits within the broader voluntary carbon market (VCM) and is the primary standard body for non-tropical peatland restoration projects. It is distinct from other nature-based carbon standards in that it focuses specifically on UK peat habitats, including blanket bogs, raised bogs, and fens.

Version 2 of the Code, released in March 2023, expanded eligibility beyond bogs to cover all three main UK peatland types, significantly increasing the number of sites that can participate.

Why do peatlands matter for carbon accounting?

Peatlands store more carbon than all other vegetation types in the world combined. UK peatlands alone hold an estimated 3.2 billion tonnes of carbon. When drainage or degradation damages peat, it releases stored carbon as CO2 and other greenhouse gases.

Globally, damaged peatlands are responsible for almost 5% of anthropogenic CO2 emissions, despite covering just 0.3% of the world's land surface. In the UK, around 80% of peatlands are in a damaged or deteriorating state, largely due to drainage for agriculture, burning for grouse management, and historical afforestation schemes.

Restoring peatlands to a wet condition stops this ongoing release of emissions. This is what the Peatland Code measures and certifies: the carbon benefit of halting degradation and allowing peat to recover.

How does the Peatland Code work in practice?

The Code operates through a two-stage credit system:

• Pending Issuance Units (PIUs): These are ex-ante credits, issued after a project receives initial validation. They represent the projected future carbon benefit of the restoration work, and buyers can trade them on the UK Land Carbon Registry before verification takes place.
• Peatland Carbon Units (PCUs): These are ex-post credits, issued after independent verification, which happens five years after validation. They represent confirmed, measured carbon benefits.

To receive validation, a project must meet strict eligibility criteria. The peat must be at least 30 cm deep, the site must be demonstrably degraded, and the restoration must not be legally or contractually required. Projects must also commit to a minimum 30-year contract, providing long-term assurance that the carbon benefit will be maintained.

Carbon accounting under the Code uses a peatland condition assessment, combining field surveys, photography, and remote sensing to classify areas by their level of degradation. The methodology then applies an emissions factor to calculate the difference between pre- and post-restoration emissions.

Additionality requirements

Additionality is a core quality test for any carbon credit: it asks whether the carbon benefit would have happened anyway without the funding from credit sales. The Peatland Code applies several additionality tests, including:

• Legal compliance: No legal requirement exists to restore the site.
• Financial feasibility: Carbon finance must fund at least 15% of restoration and management costs over the project's lifetime.
• Economic alternative: Without carbon finance, restoration would not be the most economically attractive land use option.
• Barriers: The project must demonstrate it has overcome real barriers to implementation.

These requirements confirm that the credits represent genuine, additional climate benefit rather than activity that would have occurred regardless.

What types of projects are eligible for the Peatland Code?

Since Version 2 expanded the eligibility criteria, the Code now covers all three main UK peatland classifications:

• Blanket bog: The most extensive peatland type in the UK, covering upland areas across Scotland, Wales, and northern England. The UK holds 20% of the world's total blanket bog.
• Raised bog: Dome-shaped peat deposits, typically found in lowland areas, often heavily damaged by peat extraction.
• Fens: Groundwater-fed wetlands, many of which have been drained for agriculture, particularly in eastern England.

Each project must demonstrate peat depth and degradation through in-field sampling and remote sensing before it can enter the validation process. The rigour of this sampling requirement is one of the features that distinguishes Peatland Code credits from lower-quality nature-based credits elsewhere in the voluntary carbon market.

What are Peatland Code credits worth, and who buys them?

Peatland Code credits have traded at reported prices of £15-25 per tonne of CO2e, compared to an average reported price of around £7 for nature-based credits more broadly (BeZero Carbon, 2023). This premium reflects the Code's rigorous methodology, strong additionality testing, and the ecological co-benefits associated with peatland restoration, including improved water quality, reduced flood risk, and biodiversity recovery.

Buyers are typically businesses purchasing credits through the voluntary carbon market to address residual emissions they cannot yet eliminate through operational changes. The UK Land Carbon Registry lists and trades the credits, providing a transparent public record of all validated and verified projects.

One ongoing debate in the market concerns the categorisation of peatland credits. Under current frameworks, peatland restoration generates avoidance credits (preventing further emissions) rather than removal credits (actively drawing down CO2 from the atmosphere). Removal credits command higher prices and greater demand in some compliance and voluntary frameworks. Researchers and policymakers are actively debating whether to revise the carbon accounting methodology to reflect the full climate benefit of peatland rewetting, including potential sequestration as restored peat begins to accumulate again.

Peatland Code credits and corporate carbon reporting

For companies working through their carbon footprint and considering nature-based carbon credits as part of a broader climate strategy, the Peatland Code is one of the more credible UK-based options available. Its verification requirements, public registry, and long contract periods provide a level of transparency that is often absent from lower-quality offset markets.

That said, carbon credits, including Peatland Code credits, are not a substitute for reducing emissions at source. Frameworks such as the Science Based Targets initiative (SBTi) are explicit that credits should address only residual emissions after companies have made meaningful reductions. Understanding where credits fit within a wider decarbonisation plan, rather than treating them as a straightforward offset, is the more defensible approach for any organisation facing stakeholder or regulatory scrutiny.

Seedling helps companies build the accurate, full-scope carbon footprint that makes these decisions meaningful. Without a reliable baseline, it is difficult to know which emissions are genuinely residual and which still have a viable reduction pathway.