The payments software company expects to begin its lease about May 1 and signed for an 11-year occupancy, at the site at 6220 America Center Drive, San Jose, Calif. Minimum rent was set at roughly $494,254 per month, with a 3-percent increase annually. Bill.com went public in December in an IPO that significantly exceeded expectations. Its offering price of $22 per share compared to an original estimate of $16 to $18 per share.