Federal income tax brackets for 2024 (single filers) look roughly like this: 10% on income up to $11,600; 12% on income from $11,601 to $47,150; 22% on income from $47,151 to $100,525; and so on. If you earn $65,000, your marginal rate is 22%, but your effective rate (total tax / total income) is much lower, around 13 to 14%, because most of your income is taxed at 10% and 12%.
When you get a raise from $65,000 to $70,000, the additional $5,000 is taxed at 22% (your marginal rate), plus Medicare at 1.45%, and state income tax if applicable. The rest of your $65,000 does not change tax treatment at all.
The practical question is: of that $5,000 raise, how much arrives in your paycheck? The answer typically ranges from $3,400 to $3,900 depending on your state. Not $5,000, but never less than $3,000 for this income range.