Section 15 - Value of taxable supply of CGST ACT, 2017

      15. (1) The value of a supply of goods or services or both shall be the transaction
value, which is the price actually paid or payable for the said supply of goods or services or
both where the supplier and the recipient of the supply are not related and the price is the
sole consideration for the supply.
          (2) The value of supply shall include–––
                (a) any taxes, duties, cesses, fees and charges levied under any law for the time
being in force other than this Act, the State Goods and Services Tax Act, the Union
Territory Goods and Services Tax Act and the Goods and Services Tax (Compensation
to States) Act, if charged separately by the supplier;
               (b) any amount that the supplier is liable to pay in relation to such supply but
which has been incurred by the recipient of the supply and not included in the price
actually paid or payable for the goods or services or both;
              (c) incidental expenses, including commission and packing, charged by the
supplier to the recipient of a supply and any amount charged for anything done by the
supplier in respect of the supply of goods or services or both at the time of, or before
delivery of goods or supply of services;
              (d) interest or late fee or penalty for delayed payment of any consideration for
any supply; and
              (e) subsidies directly linked to the price excluding subsidies provided by the
Central Government and State Governments.
           Explanation.––For the purposes of this sub-section, the amount of subsidy
shall be included in the value of supply of the supplier who receives the subsidy.
   (3) The value of the supply shall not include any discount which is given––
            (a) before or at the time of the supply if such discount has been duly recorded in
the invoice issued in respect of such supply; and
            (b) after the supply has been effected, if—
                 (i) such discount is established in terms of an agreement entered into at or
before the time of such supply and specifically linked to relevant invoices; and
                (ii) input tax credit as is attributable to the discount on the basis of
document issued by the supplier has been reversed by the recipient of the
supply.

    (4) Where the value of the supply of goods or services or both cannot be determined
under sub-section (1), the same shall be determined in such manner as may be prescribed.
    (5) Notwithstanding anything contained in sub-section (1) or sub-section (4), the
value of such supplies as may be notified by the Government on the recommendations of the
Council shall be determined in such manner as may be prescribed.
           Explanation.—For the purposes of this Act,––
        (a) persons shall be deemed to be “related persons” if––
             (i) such persons are officers or directors of one another’s businesses;
            (ii) such persons are legally recognised partners in business;
           (iii) such persons are employer and employee;
           (iv) any person directly or indirectly owns, controls or holds twenty-five
per cent. or more of the outstanding voting stock or shares of both of them;
           (v) one of them directly or indirectly controls the other;
          (vi) both of them are directly or indirectly controlled by a third person;
         (vii) together they directly or indirectly control a third person; or
        (viii) they are members of the same family;
   (b) the term “person” also includes legal persons;
   (c) persons who are associated in the business of one another in that one is the
sole agent or sole distributor or sole concessionaire, howsoever described, of the
other, shall be deemed to be related.