LinkedIn purchases made on behalf of your employer or for business use typically qualify for expense reimbursement by your employer.
Here's some text you can copy and paste into an email to your accounts payable department along with your receipt:
LinkedIn Premium accounts
A LinkedIn Premium account is vital for me to find, communicate, and network with professionals around the world. The [enter account type] account is the best fit for my role. The cost is [insert cost]. Please reimburse this expense on [an annual / a monthly] basis.
I'm using LinkedIn Jobs to find the best talent for our open positions. The cost of a job posting is [insert cost]. Please reimburse me for this expense.
I'm using LinkedIn Ads to pinpoint and reach my target audience. During the campaign creation process, I will set a daily budget of [insert budget] to control spending and analyze the results. Please expense reimbursements for the daily LinkedIn Ads delivery.