IF Technology is developing a play-based portfolio approach for geothermal heat in the Netherlands for EBN and Gasunie. Using a play-based portfolio approach has many advantages, including geological risk reduction and cost reduction through synergy, standardization and efficiency. A match between heat demand and geothermal heat available is made for the Netherlands to estimate the possible portfolio size and to identify the high potential areas to start the approach. Results are presented and discussed with relevant stakeholders. In a series of workshop with stakeholders, next steps are determined on how to implement the play-based portfolio approach.