
What is Sink Portfolio?
Sink Portfolios offer a combination of carbon removals tailored to your preferences and goals. It is our fully tailored service. We build a Sink Portfolio by combining multiple Sink Stories and can also include other certified carbon sink methods. We curate a portfolio that aligns with your needs and preferences, ensuring a comprehensive approach to meet your desired compensation level.
To make sure that The Carbon Contract supports you in reaching your climate targets this year and beyond, we also offer a subscription model. We deliver the appropriate amount of carbon sinks based on the compensation level you request each year. Choose Sink Portfolio to take control of your carbon neutrality journey!




The biochar carbon removals are certified, documented, and calculated according to the Global Biochar C-sink which is regulated by ICROA. The entire biochar production process – from biomass to technology and final biochar – is certified according to the European Biochar Certificate.


To ensure traceability and documentation of our biochar carbon removals, the biochar is tracked through a blockchain-based digital Monitoring, Reporting and Verification (dMRV) system provided by Carbonfuture. This ensures accurate calculation and guarantees secure, long-term carbon storage.
