He is probably adding VAT to his income tax rates, which imo is not correct.
VAT is typically charged to customers and then compensated with the VAT you pay if you as a freelancer have expenses.
For instance in Spain I have to increase my clients invoices by 21%, but if those invoices are for software, you have almost no purchases to offset that, so I need to pay that 21% quarterly.
So to earn 50k€ in net terms, I would need to charge 25k€ extra just on income tax, plus 3.5k€ on direct taxes on freelancing (because Spain), plus 21% VAT.
It’s no wonder the south of Europe does poorly.
So yes, if you spend all your money to the last penny, that would be your tax rate. But many (higher income) people do not.
When I measure my revenue, I always leave VAT out. It was never my money.