Nope, I didn't forget
Assuming without rental reimbursement scheme, for a full tax year, your tax is calculated as follows:
552k-108k=444k
1st 120k @ 8,400
remainder 324k @ 17% = 55.08.4k; total 63.48k/12 = 5.29k/mth
For the current tax year 2009-2010 if you start in November; your tax will be:
4 months x 46k = 184k - 108k = 76k. So you will pay a bit of tax (HK$3.3k) on that unless you have the rental scheme.
You will have to pay tax for the year 2010-2011 which covers the year 1 April 2010 - 31 March 2011
For the rental reimbursement, it means whatever you subscribe to the rental reimbursement scheme, if the company or the government discontinues it, you will not be compensated for it, i.e. you lose it. Seems a bit of risk! Better double check with your company and if my understanding is correct, to negotiate to have this deleted from the contract or amended to give you better protection.