one aspect the OP should consider is what area he/she wants to go into. Some areas pay a lot more than others. If you work for a investment bank, you should expect about 70k ~100k but you will need financial maths
In most cases you really won't.
I've spent the best part of the last 10 years developoing software in investment banks and, unless you're working as a quant, financial maths barely enters into things.