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Cost of MSL Curiosity

The Mars Science Laboratory (MSL) Curiosity project cost $2.53 billion, of which $2.42 billion was for spacecraft development and launch, and $116 million was for 98 weeks of operations during its primary mission. After beginning its extended mission in 2014, Curiosity's annual operations costs are, on average, $62 million per year, when adjusted for inflation.

MSL Curiosity accounted for 0.0085% of all spending by the United States during the 12-year period covering its development and prime mission.

Original $ | Inflation-Adj $
MSL Curiosity costs per fiscal year. The project began formulation in 2003 and entered the implementation (build) phase in 2006. Originally scheduled to launch in 2009, persistent engineering challenges delayed the mission until the following Mars launch opportunity in August of 2011, increasing the project's cost by approximately 56%. MSL Curiosity completed its prime mission in 2013 and continues extended operations. Source: Planetary Science Budget Dataset, compiled by Casey Dreier for The Planetary Society (accessible on Google Sheets or downloadable as an Excel file).
Development & Launch$2.42 billion
Prime Mission Operations (98 weeks)$116 million
Total$2.53 billion
Extended mission operations (avg)$62.5 million / year (inflation adjusted)

Raw data available in Planetary Exploration Budget Dataset.