Questions and answers
Who is 123 Tax for?
For self-employed people, BVs and individuals in the Netherlands who want their bookkeeping and tax done right, online and at a low fixed price.
What does it cost?
The VAT portal costs € 19,95 a month, complete bookkeeping for zzp’ers € 49 a month, a BV from € 349 a year and an income tax return from € 59. See all prices on our prices page.
Are you the Tax Administration?
No. 123 Tax is a private service of 123-NL B.V. We prepare and file returns for you with your authorisation.
Do I need to come to your office?
No. Everything works online: you upload documents in the portal and we contact you by email, phone or WhatsApp.
When are the deadlines?
VAT: the last day of the month after each quarter. Income tax: 1 May. Corporate tax: 1 June. We remind you and ask for an extension when needed.
Can I switch from my current bookkeeper?
Yes. We take over from the next quarter and arrange the authorisation with the tax office.
Do you speak English?
Yes – and Turkish, Arabic, Persian, Kurdish, Russian, Ukrainian, Chinese and more. Tell us your language when you contact us.
How do you protect my documents?
You upload them through a secure portal. We use them only for your bookkeeping and returns and keep them as long as the law requires.
General information about Dutch tax for 2026, not personal tax advice. Rules and amounts change every year – we check your own situation before we file anything. 123 Tax is not part of the Dutch Tax Administration (Belastingdienst).