What is 'Gross Interest'
Gross interest is the annual rate of interest to be paid on an investment, security, or deposit account before taxes or other charges are deducted. Gross interest is expressed as a percentage and is the opposite of net interest, which is the rate of interest after taxes are applied.
BREAKING DOWN 'Gross Interest'
When an individual deposits money in his bank account, the bank pays interest on the funds to the accountholder to compensate him for the deposit, which is used to lend money to individual and corporate borrowers. The interest paid may be deposited in the entity’s account monthly, quarterly, or annually, depending on the financial institution or account type. The interest is simply referred to as a gross interest because it does not factor in taxes, which also impacts the interest earnings. For example, if you had $3,000 in a savings account that earns 2% interest, charged on a yearly basis, the quoted 2% is the gross interest which would pay $60 at the end of the year.
However, the gross interest does not take into account other items such as taxes, fees, and other charges which may apply to the investment or account. After these costs are taken into account and deducted from the gross interest earned, the accountholder actually walks away with less. Following from our example above, if the monthly fee on the savings account is $5 and you were taxed 35%, taxes due would be would be $21 (calculated as 35% multiplied by $60) and the net interest earned would be calculated as $60  $21  $5 = $34, or 1.13%, which is less than the 2% gross interest.
Gross interest is simply the pure interest amount paid by a debtor to a creditor. Concerning bonds, the interest income bondholders receive from their investment, which will be subject to further taxes, represents gross interest. For example, assume a bond investor purchases a $1,000 par value corporate bond with a coupon rate of 3% payable annually and maturity date of five years. The bond issuer will periodically pay the bondholder a fixed interest of 3% x $1,000 = $30 for the duration of the bond’s life. The fixed coupon rate is the gross interest. However, at the end of the year, the interest earned on the corporate bond will be taxed by the government. Therefore, the bondholder’s effective net yield will be less than 3%.
The net interest is calculated from the gross interest after other fees and costs are deducted.

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