There is an interesting chart at worldpopulationreview.com/country-rankings/nato-spending-by-country which shows the NATO spending in 2025 by each country ranked as a percentage of their GDP and by how much per head of the population, as well as the total spend.
It demonstrates very clearly that despite the US funding a massive proportion of the cost, there are six countries which spent an equal or greater percentage of their GDP, (and Norway also spent a great deal more per head of their population than did the US.) It is also clear which other countries devoted almost as much proportionately to their population numbers and wealth as the US did. The US is a big rich country, and a great power for good or for evil.
The US spent 3.22% of its GDP on NATO in 2025,
but so did Denmark. Norway spent 3.35%,
Estonia 3.38% and Latvia 3.73%.
Lithuania spent 4% and Poland 4.48%
Other nations spent a smaller percentage of their GDP, from Greece at 2.85%, Finland 2.77%, Sweden 2.51%, Netherlands 2.49%, UK 2.4%, etc, with 2% being the lowest.
The highest amount spent on NATO per head of the population in each country in 2025 was by Norway, at $3,191, more than the US, which spent $2,469. Next was Denmark at $2,400, then Luxembourg $1780, Netherlands $1570, Sweden £1553, Finland $1478, UK $1164 and so on down the list, down to Albania at $159