Benetton, which initially denied using any firms located in the nine-story factory complex which workers and local journalists had warned was unsafe before it collapsed with thousands of people inside, said it was donating double the amount advised by experts.
"We have decided to go further to demonstrate very clearly how deeply we care," Benetton Group chief executive Marco Airoldi said in a statement.
Benetton commissioned experts at consulting firm PwC to estimate how it much it should contribute to an international compensation fund based on the level of its commercial association with the Rana Plaza, which collapsed on April 24th, 2013.
Benetton said the experts, using a report prepared by the UN's International Labour Organization (ILO), concluded it should contribute $500,000 of the $30 million the Rana Plaza Trust Fund is seeking to raise.
"Whilst there is no real redress for the tragic loss of life we hope that this robust and clear mechanism for calculating compensation could be used more widely," said Airoldi, adding it was making PwC report publicly available to all stakeholders.
Benetton said the contribution will take its total to $1.6 million as it also helped the victims via its own support programme in partnership with the Bangladeshi non-governmental organization BRAC.
The payment follows more than a million people signing a petition on the campaigning website Avaaz urging Benetton to contribute to the compensation fund that was put into place eight months after the disaster.
"Benetton is not giving nearly enough to ease the death and suffering their clothes have caused, but a million people forced them to reverse two years of refusing to pay any compensation," Avaaz's Campaign Director Dalia Hashad said in a statement.
"This sets a precedent for global brands everywhere: when workers die, you cannot walk away. All eyes are now on holdout companies like Carrefour, JC Penney, Walmart, and The Children's Place to step up and fill the funding gap so all victims get what they need and deserve," she added.
The Rana Plaza Trust Fund, organized by the ILO, has raised $21 million to date but needs another $9 million to meet its compensation commitments.