Thousands of Windrush scandal victims will share in an "uncapped" compensation scheme launched by the Government.
A two-year Government initiative aims to “right the wrongs” suffered by people who faced difficulties demonstrating their immigration status.
The Home Office expects up to 15,000 eligible claims will be lodged, according to their “central planning assumption.”
Confirming there will be no cap on the total amount awarded, Sajid Javid told MPs his department's "baseline estimate" was approximately £200 million.
An official impact assessment said the final figure could range between £120 million and £310 million.
Staffing costs are expected to be between £4 million and £6 million a year.
Opening the scheme, Mr Javid described the treatment of some members of the Windrush generation as "a terrible mistake".
He said: "We've been working tirelessly to fulfil that promise ever since and have helped more than 3,600 people secure the citizenship they were entitled to.
"But it's right that we compensate those who faced extreme difficulties and hardship, and this scheme will go some way in doing that.
"The Windrush generation have given so much to this country and we will ensure nothing like this ever happens again."
Satbir Singh, chief executive of the Joint Council for the Welfare of Immigrants, claimed the announcement was "short on detail" and will "fail to reassure Windrush victims that they will be adequately financially compensated for the losses and hardship inflicted on them".
He said: "Thousands of members of the Windrush generation suffered for years and then had to wait a further year to hear how they might be compensated."
Shadow home secretary Diane Abbott said: "This compensation scheme has fallen woefully short of its expectation and of what is fair.
"The Government has been disgracefully slow to do the right thing by the Windrush generation."
Payments will be available to those who did not have the right documentation to prove their status in the UK and suffered "adverse effects" on their life as a result.
These could include a loss of employment or access to housing, education or NHS healthcare, as well as emotional distress or a deterioration in mental and physical health.
People who were wrongfully detained or removed from the UK can seek compensation under the scheme.
