The FIRST POST on this thread contains the monthly EXPENSES...from there you can roughly gauge...on how much you can save or not

Normally you can expect lower XX in SGD if you are earning XX in MYR.

But with experience, sometimes you can get dollar to dollar XX value or even some increment sometimes. Case to Case basis.

Then it's up to you.

If let's say ur salary is 10k getting 40% cut, you earn around 6k sgd. If you are the type to convert, it's still more than your MYR salary and 6k sgd you can live an easy and wonderful life in Singapore (at least for me). If you do not have much commitments, I believe your expenses will be minimum around 1k SGD. Anything more than that, you can save. This is base on my own expenses, I do not go for entertainment much.     

Sometime companies in Singapore is trying to exploit foreign employees (especially Malaysian), they know Singapore currency is strong, therefore, they try to 'tekan' you as much as they can. But of course there are some good companies too. In this scenarios try to think what you really want.

1. Work and live in Singapore. (I do not think it's worth it for that salary cut)
2. Work for many many years, then go back Malaysia. (maybe worth it if you can save a lot)

Here the expenses is cheaper than Malaysia. (dollar to dollar). Food is cheaper (hawker), no need to pump petrol (public transportation), branded and good stuffs are cheaper. Of course there are things that is more expensive, example the room rent or if you want to buy a car.

mind to share where you are from and which field you are in?