demand loan
(5) Demand loan The term “demand loan” means any loan which is payable in full at any time on the demand of the lender. Such term also includes (for purposes other than determining the applicable Federal rate under paragraph (2)) any loan if the benefits of the interest arrangements of such loan are not transferable and are conditioned on the future performance of substantial services by an individual. To the extent provided in regulations, such term also includes any loan with an indefinite maturity.