Leaving SAVE? The Order You Switch In Decides Whether Your Unpaid Interest Joins Your Principal.

If you are on SAVE with a pile of unpaid interest, one decision this fall decides whether that interest gets bolted onto your principal or stays where it is.

It is not which plan you end up on. It is how many stops you make getting there.

The trap

Go from SAVE straight to RAP, and nothing capitalizes. Go from SAVE to IBR now, and from IBR to RAP later, and the second move capitalizes everything you have not paid.

Same destination. Different toll.

The reason is that the Department of Education rewrote the rules in 2023 to strip interest capitalization out of every place it was not required by law. Leaving SAVE stopped triggering it. So did leaving PAYE and ICR. One plan kept its trigger, and that was not an oversight. Congress put the IBR trigger in the statute. Under 20 U.S.C. 1098e(b)(3), unpaid interest is capitalized at the time the borrower “ends the election to make income-based repayment.”

A regulation cannot erase a statute. So IBR, the surviving income-driven plan with the shortest forgiveness clock, is also the one with a toll booth on the way out.

What it costs

Say you have $50,000 in principal at 6.5% and your SAVE payment has been sitting near zero since interest started running again. That accrues roughly $3,250 a year. Two years of it is about $6,500 of unpaid interest, tracked separately from your principal.

Capitalize it and you owe 6.5% on $56,500 instead of $50,000. That is about $420 a year of brand new interest, charged on interest you already owed. It does not go away. It compounds for the rest of the loan.

Your numbers will differ. The structure will not.

Do this

Log into your servicer’s site and find your unpaid interest balance. It is a separate line from principal. Write the number down, because that is what is at stake.

Then decide once. If IBR is where you want to stay, its forgiveness clock runs 20 or 25 years against RAP’s 30, and going there is fine. Stay there. If RAP is where you expect to land, go directly and skip the toll. Months you already paid under SAVE count toward RAP’s 360-payment clock either way.

What you should not do is treat IBR as a waiting room while you make up your mind. That is the version that costs money.

Run both payments side by side in the loan simulator at studentaid.gov before you pick. And do not rush: as we covered in July, your 90-day clock does not start until your servicer actually notifies you, which for many borrowers has not happened yet. Waiting a few weeks is free. Backtracking is not.

More on repayment options in our education hub and the best education rankings.

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