Verra VMR0006 explained: the methodology behind most plastic credits

What VMR0006 covers

VMR0006 — formally titled Plastic Waste Collection and Recycling — is the primary methodology under Verra's Plastic Waste Reduction Standard (PWRS) for projects that collect and mechanically recycle plastic waste. It covers a wide range of project types: formal collection operations in urban environments, informal sector waste picker cooperatives integrated into formal supply chains, ocean-bound coastal collection programmes, and post-consumer waste collection partnerships with municipalities and brand owners. The majority of plastic credits currently issued on the Verra registry use VMR0006 as their methodological basis.

VMR0006 was published alongside the PWRS in 2021 and has become the industry reference for credible mechanical recycling credits. It defines three core elements: the project boundary (which waste streams and geographies are included), the baseline scenario (what would happen to the plastic without the project), and the monitoring requirements that govern how operational data is translated into verified credit tonnes.

Baseline scenario and additionality

A project's baseline scenario represents the counterfactual: the most likely fate of the plastic waste if the project did not exist. For ocean-bound projects in countries with minimal formal collection, the baseline is typically open dumping, burning, or leakage to waterways. The project must quantify the proportion of its catchment area's plastic waste following each disposal pathway, drawing on country-level waste management data from UNEP, national statistics bureaus, and the Minderoo Foundation's Plastic Waste Makers Index. The greater the proportion of the counterfactual scenario involving environmental leakage, the more credits the project earns per tonne collected — creating a direct link between environmental risk reduction and credit value.

Additionality under VMR0006 follows a financial test: the project must demonstrate that, without credit revenue, the collection and recycling activity would not be commercially viable. This requires submission of a project financial model showing that net present value becomes positive only when credit revenue is included. Projects receiving substantial government subsidy or mandatory tipping fees face additional scrutiny, since public funding may independently sustain the project — reducing or eliminating the need for credit revenue and therefore weakening additionality.

Monitoring requirements and credit calculation

The monitoring requirements under VMR0006 are the operational backbone of credit generation. The core monitoring parameter is weight: every tonne of plastic collected must be verified by weight at a certified weighbridge or calibrated scale, with tickets issued at the point of verification. Weight tickets are the primary evidentiary document connecting collection activity to credits. VMR0006 requires weight verification at up to three points — the collection hub, any intermediate aggregation point, and the recycling facility intake — with the most downstream verified weight used as the credit calculation basis to prevent inflation of reported volumes.

Beyond weight, the methodology requires documentation of material type by polymer percentage (PET, HDPE, PP, mixed), since different polymers carry different baseline environmental risk scores. Chain-of-custody documentation must trace material from collection through intermediate storage, transport, and final processing, with signed receiver records at each material handover point. Projects using digital weight management systems — mobile-app-based collection logging, GPS-tracked vehicles, blockchain-anchored weight records — achieve higher MRV quality and encounter fewer audit findings. The credit volume for a monitoring period equals the verified plastic tonnage multiplied by the baseline scenario leakage factor, minus any uncertainty discount applied by the VVB. A well-managed project in a high-leakage geography can generate close to one credit per kilogram of verified plastic collected; a project with significant monitoring gaps or low baseline leakage probability generates materially fewer credits per tonne collected.