Knowledge Base

Welcome to the Expatax Knowledge Base containing hundreds of answers to questions we received about topics concerning tax, payroll, accounting, legal, business etc. related to the Netherlands. Search in our Knowledge Base or browse the different categories. Expatax is a Dutch tax and accounting firm specialized in assisting international workers, freelancers and companies. Don't hesitate to contact us if you need assistance or check our website.

BSN - Sofinumber Articles
I need a registration number for tax and social security. Is that the BSN?
Viewed 15697 times since Mon, Nov 7, 2011
BSNIf you live in the Netherlands you will need a registration number: the citizen service number, in Dutch called "burgerservicenumber" or "BSN". If you don't live in the Netherlands but you receive an income from the Netherlands, for example... Read More
BSN number for a passport application
Viewed 8176 times since Thu, Feb 7, 2013
Question: I am a dual Australian-Dutch citizen (dutch by descent), living in Australia. I‘m trying to apply for a Dutch passport for which i need a BSN number. However i‘ve never lived in the Netherlands and so don‘t have a BSN... Read More
I forgot my sofi number. Where can I find it?
Viewed 7984 times since Mon, Oct 28, 2013
Question: I got a sofi number from back in 2006 when in I was in the Netherlands. Unfortunately I don‘t have access to the sofinumber anymore. How do I find out what my (new or old) sofi number is/was? Answer: If you have lost your... Read More
Which documents are required to obtain a citizen service number (BSN)?
Viewed 6247 times since Tue, Mar 19, 2013
Question:I‘m Portuguese and I have now a contract with a Dutch university beginning on the 1st of April. I know I need to request a citizen service number in the town hall, but I‘m not sure of the documents that I need to take with me.... Read More
I have left the Netherlands 3 years ago and will come back. Is my sofinumber still valid?
Viewed 5971 times since Sun, Nov 27, 2011
Yes, your sofinumber is still valid. A sofinumber will remain valid for your entire life. If you don't know your sofinumber anymore you can go the nearest tax office and there they will tell you your sofinumber. Do not forget your passport if... Read More
Sofi number deactivation - do I need to deactivate my sofinumber if I won‘t be in the #Netherlands?
Viewed 5234 times since Wed, Feb 29, 2012
Question:   I am an EU citizen arrived in the Netherlands in December 2011. I have applied and received a sofi number using my home country’s address and I was supposed to register in a municipality over the next days. Eventually, I moved... Read More
BSN while living outside the Netherlands. How can I get one to receive pension from the Netherlands?
Viewed 4849 times since Wed, Mar 14, 2012
Question:   We live in Canada since 1981 and I need a sofi number/BSN for my pension claim. How can I get one?   Answer:   Please see: Read More
My partner is not living in the Netherlands but needs a BSN. How can we get it?
Viewed 4720 times since Sat, Nov 26, 2011
Question:   I am working in the Netherlands. My partners stayed in my home country and has no income. Because of this we want to claim the personal tax credit for the non earning partner but to be able to do this a BSN is required. How can we get... Read More
BSN & DigiD - Do they remain valid after I leave the Netherlands?
Viewed 2476 times since Wed, Apr 8, 2015
Question: I have left the Netherlands (permanently) in 2014. However, I see that my BSN and DigiD are still available (I can login for instance to certain sites using DigiD). Is that a problem? Answer: Your BSN and DigiD are personal. They ... Read More
Can I file a tax return if I only have a sofinumber and not a BSN?
Viewed 1808 times since Thu, Feb 21, 2013
Question:I have worked 1 year with sofi number in Amsterdam. I am leaving the Netherlands and would like to claim a tax refund. Is it possible with only a sofinumber ( I do not have a BSN)?Answer:Sofinumber and BSN are the same numbers, just a... Read More
BSN number for partner who is going to join me in the Netherlands
Viewed 1347 times since Wed, May 8, 2013
Question:   I am living in the Netherlands and my girlfriend is coming to live with me. She is working for a non-Dutch firm so she practically will not be working in the Netherlands. Also the contract of the house is in my name. So the question is... Read More