Highly dependent on the job. I'm a SW who hires SWs. New grad LMSWs can start at $60K in hospitals or some government jobs, or $40K in schools or some nonprofits. 5-10 years of experience and a clinical license and you'll easily pull $75-80K, or $90K+ in management.
Then there's private psychotherapy practice, which I know some people who charge $200/hour out of pocket and are scheduled out for months.
All this to say getting a master's in social work was one of the best decisions I've ever made, and I have no regrets financially, but there are some people who do end up in very low paid jobs