An entity shall account for a contract modification as a separate contract if both
of the following conditions are present:
(a) the scope of the contract increases because of the addition of promised
goods or services that are distinct (in accordance with paragraphs 26–30);
and
(b) the price of the contract increases by an amount of consideration that
reflects the entity’s stand-alone selling prices of the additional promised
goods or services and any appropriate adjustments to that price to reflect
the circumstances of the particular contract. For example, an entity may
adjust the stand-alone selling price of an additional good or service for a
discount that the customer receives, because it is not necessary for the
entity to incur the selling-related costs that it would incur when selling a
similar good or service to a new customer.
21 If a contract modification is not accounted for as a separate contract in
accordance with paragraph 20, an entity shall account for the promised goods or
services not yet transferred at the date of the contract modification (ie the
remaining promised goods or services) in whichever of the following ways is
applicable:
(a) An entity shall account for the contract modification as if it were a
termination of the existing contract and the creation of a new contract,
if the remaining goods or services are distinct from the goods or services
transferred on or before the date of the contract modification. The
amount of consideration to be allocated to the remaining performance
obligations (or to the remaining distinct goods or services in a single
performance obligation identified in accordance with paragraph 22(b)) is
the sum of:
(i) the consideration promised by the customer (including amounts
already received from the customer) that was included in the
estimate of the transaction price and that had not been
recognised as revenue; and
(ii) the consideration promised as part of the contract modification.
(b) An entity shall account for the contract modification as if it were a part
of the existing contract if the remaining goods or services are not
distinct and, therefore, form part of a single performance obligation that
is partially satisfied at the date of the contract modification. The effect
that the contract modification has on the transaction price, and on the
entity’s measure of progress towards complete satisfaction of the
performance obligation, is recognised as an adjustment to revenue
IFRS 15 REVENUE FROM CONTRACTS WITH CUSTOMERS
_ IFRS Foundation 14
(either as an increase in or a reduction of revenue) at the date of the
contract modification (ie the adjustment to revenue is made on a
cumulative catch-up basis).
(c) If the remaining goods or services are a combination of items (a) and (b),
then the entity shall account for the effects of the modification on the
unsatisfied (including partially unsatisfied) performance obligations in
the modified contract in a manner that is consistent with the objectives
of this paragraph.