Am I eligible for the 30% ruling after working for a year in NL?

Hi and welcome to the Forum.

There is no guarantee because the 30% ruling has to be agreed between both the employer and employee; the fact that you were previously entitled to 30%, does not necessarily mean it would roll over to your new job if your new employer did not agree.

Dear Cynic,

Thank you very much for your kind reply. I unterstand that there is no guarantee but I can have. This is good news for me. Thanks again.

One other point I should make clear; you can't just take your 30% status and take it to any job; the job itself has to meet the same standard as when originally granted, i.e.:

1.  the employee works for an employer that is registered with the Dutch tax office and pays payroll tax;
2.  employer and employee have to agree in writing that the 30 percent ruling is applicable;
3.  the employee has to be transferred from abroad or has to be recruited abroad;
4.  the employee did not reside within 150km from the Dutch border for the last 18 out of 24 months at the time of hiring;
5.  the employee's salary is at least EUR 37,000 per annum.
6.  The employee needs to have expertise that is scarcely available in the Netherlands.

Cynic, I have an additional question for you.
Regarding to above mentioned item-4
"the employee did not reside within 150km from the Dutch border for the last 18 out of 24 months at the time of hiring"
is it a problem for me? because at the end of my contract (1 year contract) I will be in Netherlands for 1 year. I have never been in NL before and I will start to live with this contract. At the end of one year, I just want to use this benefit for other job contracts.