The company I work for says I am a payroll clerk but I perform the duties of a payroll administrator and HR together. How important is the job title of payroll administrator in these circumstances? I'm underpaid slightly for administrator.

so being classified as a payroll clerk while performing the duties of a payroll administrator and HR may result in being underpaid for the level of responsibility you are shouldering.

In your situation, the job title of "payroll administrator" is important for several reasons. First, it accurately reflects the scope of your responsibilities and the level of expertise required for your role. Second, it can impact your career progression and future job opportunities, as it communicates your experience and skills to potential employers. Additionally, a job title can influence your salary and benefits, so being classified as a payroll clerk while performing the duties of a payroll administrator and HR may result in being underpaid for the level of responsibility you are shouldering. It may be beneficial to discuss this discrepancy with your employer and seek a title change that accurately reflects your contributions and qualifications.