[jacquesm]

From the JWST wikipedia page:

"In the 2005 re-plan, the life-cycle cost of the project was estimated at US$4.5 billion. This comprised approximately US$3.5 billion for design, development, launch and commissioning, and approximately US$1.0 billion for ten years of operations.[18] ESA is contributing about €300 million, including the launch.[84] The Canadian Space Agency pledged $39 million Canadian in 2007[85] and in 2012 delivered its contributions in equipment to point the telescope and detect atmospheric conditions on distant planets."

https://en.wikipedia.org/wiki/James_Webb_Space_Telescope

[gautamcgoel]

Those numbers are completely obsolete; the final price tag was over $10B.

[geenew]

The CSA is contributing staff to operations as well, afaik.

A more recent source says this (found through wikipedia). Values all appear to be up to launch, and do not include operations.

  NASA: 8,800m
  ESA :   850m
  CSA :   200m
  ------------
  All : 9,850m

(No epoch given to dollars; presumably they are 2021 USD)

"Günther Hasinger, ESA director of science, estimated that Europe’s contributions to JWST, in the form of instruments and the Ariane 5 launch, to be about 700 million euros ($850 million), roughly the same as an ESA “M-class” science mission.

Gilles Leclerc, director general for space exploration at the Canadian Space Agency, said Canada’s contribution of an instrument and fine guidance sensors cost the agency about $200 million Canadian ($165 million) over 20 years. “This is an investment in discoveries of the universe,” he said.

NASA now estimates it will spend $8.8 billion on JWST through the spacecraft’s launch."[1][2]

Those numbers line up with a summary the Planetary Society put out.[3] That source includes info on the operations cost, at least for the US:

"The James Webb Space Telescope (JWST) is expected to cost NASA $9.7 billion over 24 years. Of that amount, $8.8 billion was spent on spacecraft development between 2003 and 2021; $861 million is planned to support five years of operations. Adjusted for inflation to 2020 dollars, the lifetime cost to NASA will be approximately $10.8 billion.

That is only NASA’s portion. The European Space Agency provided the Ariane 5 launch vehicle and two of the four science instruments for an estimated cost of €700 million. The Canadian Space Agency contributed sensors and scientific instrumentation, which cost approximately CA$200 million."

All three agencies will supply staff to support operations, which I guess makes sense since they've all contributed different instruments.[4]

[1] https://spacenews.com/jwst-launch-slips-to-november/

[2] https://en.wikipedia.org/wiki/James_Webb_Space_Telescope#Cos...

[3] https://www.planetary.org/articles/cost-of-the-jwst

[4] https://en.wikipedia.org/wiki/James_Webb_Space_Telescope#Par...

[jacquesm]

Then maybe you should update that wikipedia page.