What in-school interest really costs you, from disbursement to the last payment
| Year in School | Dependent Total | Subsidized Max | Independent Total |
|---|---|---|---|
| Freshman | $5,500 | $3,500 | $9,500 |
| Sophomore | $6,500 | $4,500 | $10,500 |
| Junior + | $7,500 | $5,500 | $12,500 |
| Undergrad aggregate | $31,000 | $23,000 | $57,500 |
| Graduate / professional | 20,500/yr, all unsubsidized | None since 2012 | $138,500 aggregate |
Subsidized eligibility also requires demonstrated financial need from your FAFSA, so the subsidized column is a ceiling, not a promise. A dependent undergrad who maxes every year borrows $27,000, of which at most $19,000 can be subsidized.
| Feature | Direct Subsidized | Direct Unsubsidized |
|---|---|---|
| Interest in school (half-time+) | Paid by the government | Accrues from disbursement |
| Interest during 6-month grace | Paid by the government | Accrues |
| Interest during deferment | Paid by the government | Accrues (you pay it) |
| Interest during forbearance | Accrues | Accrues |
| Financial need required | Yes | No |
| Grad students eligible | No | Yes |
| 2026-27 rate (undergrad) | 6.52% fixed | 6.52% fixed |
| Origination fee | 1.057% | 1.057% |
| Credit check | None | None |
Same rate, same fee, same program. The entire price difference between the two loans is the government's interest subsidy during school, grace, and deferment.
Both loans carry the same rate and the same repayment math. The only question is how much interest piles up before repayment starts, and what that interest costs once it capitalizes.
Each year's borrowing disburses at the start of the academic year, which matches how federal loans actually pay out. Unsubsidized interest accrues monthly on the running principal through every month of school plus the grace period. Whatever has accrued, minus any payments you made in school, capitalizes (adds to principal) on the day repayment begins. Both loans then amortize over your repayment term with the standard level-payment formula: P × r ÷ (1 − (1 + r)^−n).
Enter what you borrow per year, your years to graduation, and the rate on your award letter (6.52% is the 2026-27 undergraduate fixed rate). The in-school payment field lets you test the payoff from sending even $50 a month while enrolled. Everything else updates live.
Take the classic path: $5,500 a year for four years at 6.52%, six months of grace, ten years of repayment. Total borrowed: $22,000. On the unsubsidized side, interest starts with the first disbursement. After year one the loan has accrued $359; by graduation, $3,586; by the end of grace, $4,303. That $4,303 capitalizes, so the loan enters repayment as $26,303.20.
Now amortize. The subsidized loan, whose balance stayed at exactly $22,000, pays $250.03 a month and $30,004 total. The unsubsidized loan pays $298.94 a month and $35,872 total. The subsidy was worth $48.91 a month for ten years, or $5,869, on a $22,000 education debt. Scale that to a $57,500 independent-undergrad aggregate and the stakes grow proportionally.
One honest simplification: real borrowers often hold a blend, part subsidized at the annual cap and part unsubsidized, and rates differ across cohorts since each year's loans fix their own rate. Model the subsidized max first, then run the remainder as unsubsidized, and you'll land within a few dollars of your servicer's statement.
The government pays the interest on Direct Subsidized loans while you're enrolled at least half-time, during your 6-month grace period, and during qualifying deferment. On unsubsidized loans, interest accrues from the day each disbursement lands, and anything you haven't paid when repayment starts capitalizes, meaning it gets added to principal and you pay interest on it.
It depends on how long you're in school. Borrowing $5,500 a year for four years at 6.52% accrues $4,303 of interest during 48 months of school plus the 6-month grace period. That capitalizes, the balance becomes $26,303 instead of $22,000, and the 10-year payment rises from $250.03 to $298.94: $48.91 a month and $5,869 over the life of the loan.
Unpaid in-school interest capitalizes when the loan enters repayment, once grace ends. Federal loans accrue simple daily interest while you're in school, and none of it compounds until that single capitalization event. This is why the balance on your servicer's statement can be thousands above the amount you actually received, even before your first bill.
No. Subsidized loans for graduate and professional students ended July 1, 2012, so grad students borrow Direct Unsubsidized only, up to $20,500 a year and $138,500 aggregate including undergrad debt. Subsidized eligibility today is an undergraduate benefit tied to financial need.
If you can, yes, and the calculator shows exactly what each dollar saves. Paying just the accruing interest keeps the balance at what you borrowed, erases capitalization, and on the worked example saves $48.91 a month for the next ten years. Even $50 or $100 a month chips meaningfully off the final gap.