ISAs don’t get the same tax break as pensions, but they’re still pretty good if you’re looking to save tax. Unlike pensions, ISAs don’t give you a helping hand from tax relief on the money you pay in, but you don’t pay any extra tax when you cash in your ISA. Not a penny. What you do get is the chance to cash in your ISA whenever you want to, without paying a penalty (although if the stock market has just fallen through the floor, you could lose a chunk of money).