Top Energy's 31,000 customers will get a nice surprise when they receive this month's power bill, which will include a lines charge discount credited to their account.
Top Energy chief executive Russell Shaw said the credit - worth around $6 million - would be welcome in the lead-up to Christmas.
"All eligible electricity account holders, regardless of how they pay, will see the credit on their November power bill issued by their electricity retailer," Shaw said.
The credit would be based on the level of energy used, with 90 per cent of customers receiving a $200 rebate. Commercial clients would receive more, and low-usage customers less, he said.