The Price of a Kilo to Mars

Every Mars plan is, underneath, a freight quote. And freight is priced by the kilo. Here is what a kilogram has cost, what it costs now, and what has to be true before Mars cargo is a business instead of a budget line.

Ask a shipping company what anything costs and the answer starts with weight. Mars is no different — it is just the longest route in the business, and for most of history the rate card was absurd.

The curve: sixty-five years of falling freight

A 2026 Cambridge / Politecnico di Torino study, published in PNAS Nexus and analysing more than 4,400 launches from 1960 to 2025, puts hard numbers on the curve. The average cost of putting a kilogram into orbit fell from about $87,023 in 1960 to about $3,868 in 2025 — a drop of more than 95 percent. The pattern underneath matters more than the endpoints: every time the total mass humanity has ever sent to orbit doubles, the cost per kilogram has fallen by about 21 percent. That is a learning curve, the same kind that made steamships, then solar panels, cheap — and the researchers note launch is currently falling faster than solar did.

If the trend simply holds, the same study projects roughly $1,600 per kilogram by 2030 and around $300 by 2040, with Starship-class vehicles pulling costs toward about $1,000 a kilogram sooner. Those are projections from a trend line, not price lists — but trend lines with 65 years behind them deserve respect.

Where the price actually sits today

Strip away averages and look at a real, bookable product. A Falcon 9 launch currently lists at about $74 million for up to roughly 22 tons of listed capacity — on the order of $3,400 per kilogram. Fly it the way reusable missions actually fly, closer to 17 tons, and the effective figure rises. Compare that with the Shuttle era's commonly cited figure of roughly $55,000 per kilogram, and the first lesson of the Mars economy appears: reusability did not make space cheap, it made it quotable. There is now a rate a customer can plan a business around.

One honest warning, because this number gets abused constantly: cost per kilogram is a slippery unit. The Shuttle figure is a whole-program cost divided by capacity; the Falcon figure is a customer price divided by capacity; Starship figures are projections for a fully reusable system that has not yet flown an operational customer mission. Same unit, three different kinds of arithmetic. The direction is real. The neatness is not.

And Mars itself? There is no rate card — yet

Here is the part the headline numbers hide: every figure above is the price of reaching Earth orbit. Nobody sells delivery to the surface of Mars at any price. The only "deliveries" ever made were one-off government science missions, and priced that way they are staggering. NASA's Perseverance mission cost about $2.7 billion all-in, and the rover it landed masses 1,025 kilograms. Divide one by the other and you get roughly $2.6 million per kilogram of rover on the Martian surface.

That is not a freight rate — the $2.7 billion bought a nuclear-powered science laboratory, its cruise stage, its landing system, and years of operations, not a kilogram of cargo. But as an illustration of the gap it is unmatched: a kilogram in Earth orbit costs a few thousand dollars; a kilogram delivered to Mars, the bespoke way, has effectively cost millions. The entire Mars business case lives in closing that gap.

Closing it requires three things to happen at once. First, the orbit price keeps sliding down the learning curve — which is why the ship-catch milestone in our first Mission piece matters commercially, not just technically: full reusability is what moves Starship from a big rocket to a cheap one. Second, the vehicle has to fly often, because the study's 21-percent-per-doubling rule rewards volume, not prototypes. Third, someone has to productise the Mars leg itself — cruise, entry, descent, landing — as a repeatable service rather than a new invention each time. NASA's Commercial Mars Payload Services idea, covered in "Who Pays for Mars?", is the first sketch of exactly that.

The Money Angle

First, watch $/kg the way shipping investors watch container rates: it is the single number that decides which Mars businesses are fantasies and which are spreadsheets. Habitats, surface power, cargo landers, even media and merch built on real missions — all of them get easier or harder as that number moves.

Second, the money is made at the kinks in the curve, not along it. Each order-of-magnitude drop — $55,000 to $3,400, and eventually toward the study's ~$1,000 and below — does not just cheapen existing plans, it makes whole categories of plan possible that were not worth writing down before.

Third, beware anyone quoting a Mars $/kg today as if it were a price. Until a customer can buy Mars delivery the way they can buy a Falcon 9, every Mars freight figure — including the optimistic Starship ones — is a forecast wearing a price tag. The forecasters with the best record so far are not the loudest voices; they are a 65-year learning curve that has been right, on average, for two-thirds of a century.

Mars becomes a place you do business when a kilo there costs what a business can pay. We are not there. But for the first time, the freight curve points at a date instead of a dream.

Gear tie-in

LEGO Technic NASA Mars Rover Perseverance (42158) — Building Set. The $2.6-million-a-kilo rover, at desk scale — a reminder of what Mars delivery costs when every kilogram is bespoke.