Income received during your first 182 days will be taxed based on a non-resident flat rate of 25%. From 183rd day onward, the tax rate will vary. It will be based on the tax table as provided below.
Since your contract is more than a year, you will be filing your tax return twice, e.g. the assessment year 2014 and 2015. Your assessment year 2015 will be calculated based on the resident tax rate and the non-resident flat rate of 25% will no longer be applicable.