The final cost of the project is impacted by many factors, including the volume of used nuclear fuel to be managed. 

Based on the latest projection, at the end of the planned operation of Canada's existing nuclear reactors, the number of used fuel bundles could total up to about 5.5 million. This places the cost of the project at an estimated $26 billion (in 2020 dollars) over the ~175 year life cycle of the project.

The NWMO updates the cost estimate at least every five years. 

Cost Estimate Reports – 2021

Cost Estimate Reports – 2016

Cost Estimate Reports – 2011