• President Joe Biden announced a new student loan forgiveness plan Monday, which could benefit as many as 30 million people, according to estimates.
• Biden's Plan B targets five specific groups of borrowers.
• Here's who could qualify for the new relief effort.

President Joe Biden announced a new student loan forgiveness plan Monday, which when combined with his administration's ongoing relief efforts could benefit tens of millions of borrowers.

Narrower in scope than the first education debt relief effort that the Supreme Court ultimately blocked, Biden's "Plan B" targets five specific groups of borrowers.

Here's the breakdown of who stands to benefit.

1. Borrowers with 'runaway interest'

More than 25 million borrowers owe more than they originally borrowed in federal student loans because of accrued interest charges, according to the Biden administration.

As part of this plan, those borrowers could get up to $20,000 of unpaid interest on their debt forgiven, regardless of income. Certain low- and middle-income borrowers, if they're enrolled in an income-driven repayment plan, could have the entire interest balance that has accrued on their federal loan debt since they entered repayment canceled.

Anyone enrolled in the Saving on a Valuable Education Plan, or SAVE, or any other income-driven repayment plan would be eligible without having to apply.

2. Borrowers eligible for forgiveness programs, who haven't applied

Consumer advocates and borrowers have complained that the government's debt forgiveness programs can be hard to know about and to access.

Biden's new plan is also expected to cancel debt for borrowers who are otherwise eligible for relief through Public Service Loan Forgiveness or SAVE or other income-driven repayment plans, but have not successfully applied.

The Department of Education will review the accounts of borrowers to identify who could be eligible for this type of relief, which would go into effect automatically, the administration said.

3. Borrowers who entered repayment over 20 years ago

Another 2.5 million borrowers would benefit from the forgiveness of student loans that have been held for two decades or longer.

Borrowers with undergraduate debt would qualify for forgiveness if they first entered repayment on or before July 1, 2005, and borrowers with any graduate school debt would qualify if they first entered repayment on or before July 1, 2000, the administration said. Both direct loans and consolidated loans are eligible for relief. 

4. Borrowers who enrolled in 'low-value' colleges

Graduates with loans from "low-value" institutions or programs would also be eligible for loan forgiveness.

Under this part of the plan, borrowers who attended institutions or programs that closed or "failed to provide sufficient value" — meaning that graduates were left no better off than someone with a high school diploma — could apply for relief.

"Low-value" institutions are generally colleges that lost their eligibility to participate in the Federal Student Aid program or were denied recertification because they cheated or took advantage of students, according to the Biden administration.

Along these same guidelines, the Education Department has already canceled the student loans of more than 1 million students who attended certain for-profit schools, including Corinthian Colleges and ITT Technical Institute.

5. Borrowers experiencing 'hardship'

While harder to quantify, "millions of borrowers could be eligible for relief if they are experiencing hardship in their daily lives that prevent them from fully paying back their loans now or in the future," the administration said. This piece of the plan would cancel student debt for borrowers who are at high risk of defaulting on their student loans or families burdened with other expenses like medical debt or child care.

With higher debt burdens, Black and Latino borrowers will benefit disproportionately from this relief, the White House also said.

Subscribe to CNBC on YouTube.