Accrued Interest: Definition and What It Is
Accrued interest is the interest that has built up on a loan but has not yet been paid. It generally accumulates daily based on the outstanding principal balance and the loan's current interest rate.
When a payment comes in, the lender applies it to accrued interest first. Whatever is left over reduces the principal. This is why balances can feel like they barely move early in repayment, and why a missed payment can set progress back further than expected. If accrued interest goes unpaid long enough, it can be added to the loan balance through a process called capitalization, which then increases the amount on which future interest is calculated.
Why it Matters
Borrowers are often surprised to find that their payoff amount exceeds the original loan amount, often due to accrued interest. It builds during school, during deferment or forbearance, and any time a payment does not fully cover it. The balance grows not because anything went wrong, but because the math keeps running.
For borrowers with distressed private loans, accrued interest compounds the problem. A loan that went into default two years ago carries far more in accrued interest than the original statement showed. Yrefy's refinance program works with borrowers in this situation. For a fuller picture of how repayment affects long-term costs, the student loan repayment options article is a good starting point.
Analogy
Think of accrued interest like snow piling up on a roof. It falls constantly, whether you're paying attention or not. When you shovel, the top layer, the fresh snow, comes off first. Only once that's cleared does the shovel start cutting into what's underneath. But leave the snow unshoveled too long, and the bottom layer compresses into ice and fuses to the roof. It's not separate anymore, it's part of the roof itself. The next snowfall piles on top of that new, higher surface, and now there's more roof to clear before you're making any real progress.
