Is your company registered in France?
This is an indirect tax that companies collect on behalf of the State.
That 20 % added to your Qonto subscription cost is deductible from the VAT that you collect (too) on behalf of the State as part of your activity.
Our advice is the following: keep your Qonto invoices in a safe place! They will be useful for this precious equation: VAT collected - deductible VAT = VAT to pay
Is your company registered in Italy, Spain, or Germany?
Companies that are not registered in France are exempt from French VAT. We need to know your intra-community VAT number.
Please contact us, so we can help you.
Of course, this isn't tax advice (there are other experts for that), we're just sharing a good practice that could save you a few euros. Small streams make big rivers.