The simplest way to work out your local package would be to first come up with a figure for your desired MONTHLY salary. Add your estimated MONTHLY rental. (Average rentals can be calculated from the
property section of this website.) And multiply the result by 12 for your total annual 'local package'. If you've got kids, add in the school fees for the year.
Then you have a starting point. If it appears to be too expensive, even to your eyes, subtract/compromise a bit.
Even if it's not an 'expat package' it is not unusual for companies to include annual return flights home on top of your 'local package'.
Ultimately, the only guide I would advise you to consider in your calculations is that you should NEVER find yourself earning less here than at home. To my mind, even the fact that there is probably a lower tax rate here should not be a factor.
"Both politicians and nappies need to be changed regularly, and for the same reasons."