The “% of the federal budget” comparison is mostly a rhetorical trick. It can matter politically, sure, but it’s a terrible way to compare programs across time. Apollo happened before a bunch of Great Society-era spending and later expansions in the federal budget. Comparing shares across radically different eras is basically apples-to-elephants.
I spent some time trying to get solid numbers because I was actually interested in this.
Inflation-adjusted averages:
Apollo-era NASA average (FY1961–FY1972): ~$44.2B/year (2024 dollars)
NASA average over the last ~20 years: ~$25B/year (2024 dollars)
So over FY1961–FY1972 (12 years), that’s roughly $44.2B × 12 ≈ $530B in today’s money for all of NASA.
And what did that buy?
A NASA that was basically inventing the modern space industry:
- building launch sites (LC-39 etc.)
- building huge test facilities and stands
- building control centers / mission operations
- building manufacturing capability at scale
- building/expanding NASA centers
- building DSN and deep-space comms infrastructure
- massive amounts of fundamental research and basic engineering research
- building multiple human spacecraft programs (Mercury → Gemini → Apollo)
- developing major new engines (F-1, J-2, and a bunch of others)
- building multiple rockets and variants
and flying tons of missions, including 6 Moon landings
But of course, NASA wasn’t only Apollo. Even though Apollo dominated, NASA also did a bunch of major non-lunar work: Mariner, Orbiting Solar Observatory, Echo / Telstar / Relay / Syncom, X-15, and the beginnings of Skylab, etc.
A good summary is here:
https://www.planetary.org/space-policy/cost-of-apollo
That article’s Apollo-only number is around $257B (in 2020 dollars) depending on what you include. I used 2024 $ above for budget. But its close.
Now compare to Constellation and its children (Orion + SLS).
A fair estimate for the cost to get to where we are today is around ~$90B (not counting suits or the SpaceX / Blue Origin landers). And what did we get for that? So far, a few test very incomplete flights.
Artemis/SLS is not doing Apollo-style clean-sheet propulsion development. It mostly reuses Shuttle-era propulsion (RS-25 + solids) with restarts/updates, rather than developing new engines like Apollo had to.
Looking forward gets fuzzier, but current projections suggest roughly:
~$20–25B more before the first crewed lunar landing (assuming the schedule doesn’t slip again)
then for five more landings, under optimistic “one per year” cadence assumptions, maybe another ~$30B or so
So you end up around ~$150B total if everything goes right from here. And note: this assumes huge savings because SpaceX and Blue Origin are spending lots of their own money rather than NASA building its own lander in the Apollo style.
So very roughly:
~$150B (Constellation → SLS/Orion → first 6 landings, optimistic)
vs
~$250B-ish (Apollo-only, depending on inclusion choices and dollar basis)
And my basic point still stands: Apollo had to build the ecosystem, the infrastructure, and the foundational research base from scratch. A gigantic amount of that 1960s infrastructure is still in use today, and 60+ years of engineering and technology progress should matter. That alone should be worth well over $100B in “things you don’t need to reinvent.”
In pure execution terms, it’s hard to argue Apollo wasn’t on a totally different level.
I spent some time trying to get solid numbers because I was actually interested in this.
Inflation-adjusted averages:
Apollo-era NASA average (FY1961–FY1972): ~$44.2B/year (2024 dollars)
NASA average over the last ~20 years: ~$25B/year (2024 dollars)
So over FY1961–FY1972 (12 years), that’s roughly $44.2B × 12 ≈ $530B in today’s money for all of NASA.
And what did that buy?
A NASA that was basically inventing the modern space industry:
- building launch sites (LC-39 etc.)
- building huge test facilities and stands
- building control centers / mission operations
- building manufacturing capability at scale
- building/expanding NASA centers
- building DSN and deep-space comms infrastructure
- massive amounts of fundamental research and basic engineering research
- building multiple human spacecraft programs (Mercury → Gemini → Apollo)
- developing major new engines (F-1, J-2, and a bunch of others)
- building multiple rockets and variants
and flying tons of missions, including 6 Moon landings
But of course, NASA wasn’t only Apollo. Even though Apollo dominated, NASA also did a bunch of major non-lunar work: Mariner, Orbiting Solar Observatory, Echo / Telstar / Relay / Syncom, X-15, and the beginnings of Skylab, etc.
A good summary is here: https://www.planetary.org/space-policy/cost-of-apollo
That article’s Apollo-only number is around $257B (in 2020 dollars) depending on what you include. I used 2024 $ above for budget. But its close.
Now compare to Constellation and its children (Orion + SLS).
A fair estimate for the cost to get to where we are today is around ~$90B (not counting suits or the SpaceX / Blue Origin landers). And what did we get for that? So far, a few test very incomplete flights.
Artemis/SLS is not doing Apollo-style clean-sheet propulsion development. It mostly reuses Shuttle-era propulsion (RS-25 + solids) with restarts/updates, rather than developing new engines like Apollo had to.
Looking forward gets fuzzier, but current projections suggest roughly:
~$20–25B more before the first crewed lunar landing (assuming the schedule doesn’t slip again)
then for five more landings, under optimistic “one per year” cadence assumptions, maybe another ~$30B or so
So you end up around ~$150B total if everything goes right from here. And note: this assumes huge savings because SpaceX and Blue Origin are spending lots of their own money rather than NASA building its own lander in the Apollo style.
So very roughly:
~$150B (Constellation → SLS/Orion → first 6 landings, optimistic) vs
~$250B-ish (Apollo-only, depending on inclusion choices and dollar basis)
And my basic point still stands: Apollo had to build the ecosystem, the infrastructure, and the foundational research base from scratch. A gigantic amount of that 1960s infrastructure is still in use today, and 60+ years of engineering and technology progress should matter. That alone should be worth well over $100B in “things you don’t need to reinvent.”
In pure execution terms, it’s hard to argue Apollo wasn’t on a totally different level.