You are a part of Het Zinkstuk  from the moment the board approves your membership. As a member you can participate in all swimming and waterpolo practices as well as all the activities.

The membership means a lot of fun and an excellent way to get to know other students quickly.

Membership is continuous and will only be ended if you sign out. Your membership then stops per the next sign-out dates (December 31 or June 30)

Yes, that is possible if you:

  • Study at another institution for higher education (University or Hogeschool) in the Netherlands. It may be that you are first placed on a waiting list, so that it takes a while before you can become a member. 
  • You are a student at: ROC Midden-Nederland, MBO Utrecht, Nimeto or Grafisch Lyceum Utrecht. More information about this can be found on the website of Olympos. 

Update June 2023: At this moment, there is no waiting list. 

For more information about the waiting list you can e-mail

You can sign up using this registration form.

The costs for a full season 2022/2023 are displayed in the table below.

KNZB contribution
(€ 20,50)
Association fee
(€ 59,00)
Start license
(€ 40,75)
Competition fee
(around € 70)
Contributors contribution
(min. € 20)
Water polo X X

€ 79,50
Water polo + competition X X X X
€ 190,25
Swimming X X

€ 79,50
Swimming + external competition X X X

€ 120,25

X € 20,00

A new member also pays a one-time registration fee equal to the costs of the KNZB-contribution and potentially the starting fee for a start license.

KNZB contribution wil be deducted every half year and will be payed up front.

Olympos sportscardWhen you are a member of Het Zinkstuk, it is obligated to own a 6 or 12 months sportscard of Olympos (the Olympas).The Olympos sportscard has to be bought via the sportcenter Olympos and then has to be registered to Het Zinkstuk. For more information about the Olympas, go to 'Do I need an Olympos sportscard?'

Competition fee. For members who play in a waterpoloteam there's an additional competition fee of about €70,00. You also need a start license if you want to play in a waterpoloteam.

Start license swimming. For external swimming competitions (except for NSZK's and the NKS) a license is required. A license can be acquired through Zinkstuk for €40,75. Read more about the license at ''When do I need a startlicense and how does it work?'

You are obliged to have a valid Olympos sportscard registered to Het Zinkstuk during your entire membership.

The Olympos sportscard has to be bought via the sportcenter Olympos and then has to be registered to Het Zinkstuk. Don't know which kind of sportscard to buy? Do the check via this tool.

Arrange your Olympas via this link or the register it to Het Zinkstuk via this link. Your Olympas must at least be valid until the next sign-out date (valid until 31-07-XX or 31-01-XX).

When the registration of your sports card expires you will receive an email telling you to extend your registration. As long as you don't have a valid Olympas that is linked to Het Zinkstuk, you cannot take part in the practices and activities.

If you remain in jeopardy you will receive a fine of 110% the amount Het Zinkstuk would otherwise receive for you from Olympos. The dates on which the board checks your sportscard are the first of November and the first of April.

Already cancelled your membership? You still need an Olympas untill your membershp has officially ended (31/12 or 30/06).

You will need a license when you:

  • are part of a water polo team and play in the competition, or
  • want to participate in KNZB swimming matches.

You do not need a license for student competitions (NSWK, NSZK, ONKS). 

You can request or stop your license on your profile on the website. A start licence is valid from Januari 1st till December 31st and will be automatically extended if you don't cancel it before January 1st via your profile on the website.

Contributors cannot sign up for a start license.

For members the contribution is collected at the end of October and the end of February  This is KNZB contribution and memberschip contribution. 

For contributors, the contribution is also collected at the end of October.

Other costs
All other costs, for example those for activities or merchandise, are collected at the end of each month.

Method of payment
Costs are collected via the payment method you selected at your registration.

Two weeks before a cost collection, you will receive a message containing the amount that will be collected.

In case you choose to transfer the costs yourself or when the automatic collection did not succeed, you are required to make the payment within two weeks.

A maximum of three payment reminders will be sent. The board reserves the right to suspend persons who do not fulfil their payment obligation.

At Het Zinkstuk, there are two moments per season where you can end your membership. You have to do this yourself on your membershippage. De sign-out dates are the last possible moments you can give notice of these changes. 

The sign-out dates are as follows:

  • For members: December 29 and June 30.
  • For contributors: July 31.

If you miss the sign-out date, you will stay a member with us at least until the next sign-out date. 

If you have any questions about this, email

End your membership or convert it before one of these dates via this link.

As a member you are entitled to suspend your membership for half a season. You can do this once a season by sending an e-mail to In case the board honors your request you will only have to pay half the contribution. During the suspension of your membership you cannot prescribe to any of your rights as a member.

Please note that in the event of a violation you might still have to pay the entire contribution and any missed grants under penalty of suspension.

When you are no longer a student you are allowed to remain a member for one season at the regular contribution cost plus 28 euros. After that season you can apply for dispensation by sending an e-mail to If you do not do this, your membership will be cancelled automatically. When dispensation is assigned, the default contribution becomes: 1st year dispensation: €157,70. 2nd year dispensation: €315,00. After 2nd year dispensation: Not an option.

You can cancel your membership using this page. Your membership will then end per the next sign-out date. 

It is important that you give notice of your wish to sign out in time on the website. Your membership never ends automatically. The board can not sign out members. We do not get a notice from the University when your studies have ended.

For members applies that after an unsubscribe-date a notice period of 1 month follows in which your membership continues. During the notice period, it is not possible to participate in matches organized by the KNZB. If you want to keep participating in these matches, you have to send an e-mail before the unsubscribe-date to

You can become a member or contributor at any time during the season.

If you become a member between February 1 and August 1, you only have to pay half of the training fee for that season. You do pay the full KNZB contribution, registration costs and eventually the costs of a start license

You can become a member of alumni association Het Zinkstuk at any time. Your membership runs from the moment you register and the contribution will be debited each year at that moment. You can register at

Contributors/ Friends
We are not accepting new contributors at this time. You can become a Friend of Het Zinkstuk at any time during the season.

Are you no longer a student, but you want to keep in touch with all the fun people at Het Zinkstuk? As an ex-member, you have multiple options to stay connected to Het Zinkstuk! 

Alumni association: As a former member of Het Zinkstuk you can become a member of the alumni association! Members of the alumni association can (with permission of Het Zinkstuk board) participate in activities of Het Zinkstuk. In addition, the alumni association itself also offers activities! More info on the alumni association can be found

Friends of Het Zinkstuk:

  • Have the option to continue receiving the member email.
  • Help keep the Zinkstuk financially healthy! 
  • You can become a contributor with a contribution of at least €20,- per year. You can sign up using 

Contributors (only accepted before June 30 2022) 
  • Can participate in all activities, with the exception of training.
  • May come to the AV, but have no voting rights here.
  • Have the option to continue receiving the member email. Help keep the Zinkstuk financially healthy!