Public hearings were held across the country earlier this year.
Big business, the mining sector and civil society groups are strongly opposed to a tariff increase.
But the utility said it needs to recover R22.8 billion.
The National Energy Regulator was expected to make the announcement on Eskom's application last week, but said it needed to verify more information.
Eskom maintains that it has put forward a strong case, saying it needs funds in order to recover R22.8 billion but there’s a strong counter-argument that an electricity price hike will have a detrimental effect on consumers and business.
