He is SO well off, he doesn’t know what to spend his money on.
If I were as well off as she is, I’d retire.
Well off does not necessarily have to refer to money; it can also be used in respect of opportunities, facilities etc.,
e.g. Young people today don’t know how well off they are.
i.e. children nowadays do not appreciate the opportunities which are open to them and which
were not available to their parents.
Better off is the comparative form of Well off, i.e. richer.
e.g. He is far better off than I am.
However, it can also be used to mean “It would be/it is better for you, him, it, etc.”,
l. You’d be better off going on the motorway than taking a country route, if you want to
arrive there by 6 o’clock.
2. She’s better off without her husband; he made her life a misery.
Note that this meaning of Better off is still used in the comparative sense. This construction should not be
confused with Had better which is a slightly stronger form of should,
e.g. I’d better go now; I’ve got quite a few things to do.
The opposite of Better off is Worse off, i.e. poorer.
e.g. Even though my brother has been working for quite a number of years, he is worse off than me.