Self-made is used to describe people who have become successful and rich through their own efforts, especially if they started life without money, education, or high social status.
He is a self-made man.
...a self-made millionaire.
self-made in British English
adjective
1.
having achieved wealth, status, etc, by one's own efforts
2.
made by oneself
self-made in American English
(ˈsɛlfˈmeɪd)
adjective
1.
made by oneself or itself
2.
successful, rich, etc. through one's own efforts
a self-made man
3.
being or having become such primarily through one's own efforts
a self-made millionaire
Examples of 'self-made' in a sentence
self-made
His father is a self-made businessman with an interest in horseracing.
The Times Literary Supplement (2010)
The modest self-made millionaire has been spotted running round the track himself.
The Sun (2006)
All three are self-made millionaires with humble beginnings.
Times, Sunday Times (2007)
Sporting pursuits are still slotted into the busy lives of proudly self-made people.
Times, Sunday Times (2011)
What does the self-made man love?
Christianity Today (2000)
A good number are self-made business people.
Times, Sunday Times (2015)
My father was a self-made businessman and I saw what it takes to build a business.