First Internet Bancorp, parent of Indianapolis-based First Internet Bank of Indiana, plans to add 48 jobs as part of a $4.3 million expansion into Fishers, the company said Tuesday.

The investment will go toward purchasing and refurbishing a 49,700-square-foot facility at 11201 USA Parkway near Interstate 69 and 116th Street. First Internet acquired the building, which formerly housed the St. Vincent Health medical center, to expand its mortgage sales team.

The 48 jobs should create $3.3 million in new payroll, First Internet said, which equates to an average annual salary of $68,750.

“Much like First Internet Bank itself, the Fishers community is growing and thriving,” company Chairman and CEO David B. Becker said in a written statement. “With its many amenities, strong school system and community events, Fishers has positioned itself to be a place where people want to live and work.”

Becker founded First Internet Bank in 1999. The bank has no branches and 102 existing employees at its corporate headquarters, which will remain at 9200 Keystone Crossing.

First Internet is expected to use about 24,000 square feet of the new space and lease the additional space to other tenants. The company plans to close on the sale next month and start interior construction, which is expected to take from eight to 12 weeks, a company spokeswoman said.

First Internet announced in December that it is seeking to have its stock traded on the NASDAQ exchange. The company has filed with the SEC to make the move from the over-the-counter board.

First Internet shares were unchanged Tuesday morning, at $27.46 each.