*They may increase this to 100k.
Income tax is around 20-25%. What is expensive is the pension (27.5%), but as you said those are not taxes.
If you're freelance and earn <€65k then you can use the 'regime forfettario' and pay a flat 5% tax + pension contributions.
If you earn more & have lived abroad for the past few years, then you can get tax relief on 90% of your income in your southern region (less in the centre/north).
It's normally 27.5% [1] of pension (so not taxes), plus income taxes (which hardly hit 30%).
Personally even being digital nomad most of my time and living abroad right now I still have my company in Italy, as the final saving isn't that much if you care about having a good pension in future.
[1] this may change if you're part of a profession related pension system, the value I wrote is for the default one.