Is "huge" slightly informal?

Solution 1:

I don't regard "it has a huge amount of assets" as informal, but I do regard it as bad writing, and would instead say "it has huge assets". Note, besides not regarding it as informal, I also don't regard it as formal, nor would I regard it as formal if a synonym such as major, substantial, significant were substituted. All of those quantities are quite indefinite, and I think a formal statement (in sense of official statement) should give more-precise information about assets or debt.

Solution 2:

It’s probably neither here nor there, but this Google N-Gram makes me wonder whether its perceived slanginess is about its comparative newness:

Solution 3:

Huge does not seem informal but it does seem a bit emotive. I seems to impart the opinion of the speaker in the example given.