noun
paid-in capital
Accounting term for the portion of shareholders' equity that has been paid in by investors, as opposed to retained earnings or other reserves.
払込資本は、株主が実際に会社に払い込んだ金額です。
Paid-in capital is the amount shareholders have actually paid into the company.
資本金 is a broader term for stated capital or capital stock, while 払込資本 specifically refers to the portion that has been paid in.
Compound of 払込 (payment, from 払う 'to pay' + 込む 'to put in') and 資本 (capital).