a debenture is defined as a certificate of agreement of loans which is given under the company's stamp and carries an undertaking that the debenture holder will get a fixed return (fixed on the basis of interest rates) and the principal amount whenever the debenture matures.

The interest is calculated on the face value of the debentures. This interest amount is paid periodically, generally yearly or half-yearly. The interest is a charge against the profit of the company.