The phrase "to get a raise" means to receive an increase in salary or income from your employer.
Sentences with «to get a raise»
Can I support my lifestyle if I don't get this raise in pay? (topresume.com)
Why was I acting like I was fine with not getting a raise in three years? (mindbodygreen.com)
If getting a raise at your current position is unlikely, you might want to consider picking up a weekend or side gig to supplement your income. (gobankingrates.com)