HI, it was 7 sing dollars per adult for the special exhibits and the general area is free but you must check if the museum general area is open. In April it was closed for renovations but you didn't know that till you got there. The free guided tour is fantastic I highly recommend it.

The Museum is free but the most interesting part the Permanent Galleries which show the 700 years history of the country had a small charge of about 5-7USD. Its definately worth seeing but it reopens in September, they also provide free guided tours which makes it even more interesting but at certain fixed times so check that out before you visit.

Entry is free to the National Museum building.

However there are charges to special works & exhibitions, to cover costs.

These are optional & you choose of you want to see these. The charges are not standard & depends on the individual exhibitions but it is not expensive.

As with most attractions anywhere,only local currency is accepted.

I don't remember exactly except that it is cheap as are all the museums in Singapore.