$100K before taxes is decent salary in London. It's not a lot a lot but that's what a senior developer would make in most companies (excluding financial sector+ some extremely funded shops). Would you stop worrying about money? No,of course not.But you could afford to live in decent area,drive normal car,have some nice holidays in pretty places + put some aside for rainy day.Of course,this is London,so no matter what kind of money you make, there's always someone making x10 times that. But isn't that's the case anywhere?