Refinance Student Loans or Use the Debt Avalanche?
This calculator compares two ways to reduce your student loan interest burden: refinancing all loans to a single lower rate versus keeping your current loans and directing extra payments to the highest-rate loan first using the debt-avalanche method. Enter your loan details and a refinance offer to see which strategy saves more in total interest.
Highest rate first saves you
Difference between the two orders
in interest, against paying the smallest balance first — and you clear everything by .
On these balances the two orders finish in the same place — pick the one you will actually stick to.
- Same budget, two ordersAvalancheSnowball
- Debt-free in
- Interest paid
- Debt-free on
Avalanche order
Every dollar you free up when a loan clears rolls onto the next one in both plans — that is the only fair way to compare them. Total monthly budget: .
At these minimums and rates at least one balance grows faster than you are paying it down, so neither order ever finishes. Raise a minimum payment or the extra amount.
Minimum payments and rates are yours to enter. Interest is compounded monthly on each loan. If a minimum payment is smaller than that loan's monthly interest, the balance grows and the plan will not finish.
How the Avalanche Works Without Refinancing
The debt avalanche directs every extra dollar above minimum payments toward the loan with the highest interest rate. Once that loan is paid off, the freed-up payment rolls into the next highest-rate loan, and so on. The method minimizes total interest because it reduces the most expensive debt first, and it requires no new loan contract, no closing costs, and no credit inquiry.
For borrowers with a mix of federal and private student loans, the avalanche has another advantage: it preserves federal loan status. You can target a high-rate private loan for accelerated payoff while keeping federal loans intact with their income-driven repayment options, PSLF eligibility, forbearance, and disability discharge. The calculator models the avalanche sequence across up to five loans and shows the payoff date and total interest for the entire set. Enter your loans to see how quickly the highest-rate debt falls and how much that sequence saves compared to making equal payments across all loans.
When Refinancing All Loans Beats the Avalanche
Refinancing wins when your loans all carry rates close to each other and the combined refinance offer is meaningfully below all of them. In that scenario the avalanche provides little advantage because there is no high-cost outlier to eliminate first, and the across-the-board rate reduction from refinancing lowers total interest on the entire balance immediately.
The calculator places both outcomes side by side: avalanche with existing rates versus a single refinanced loan at the rate you enter. If you hold federal loans, keep in mind that refinancing them into a private loan permanently eliminates access to IDR, PSLF, forbearance, and disability discharge. A hybrid approach that some borrowers use is to refinance only the private loans while keeping federal loans on the avalanche. The tool does not model hybrid strategies directly, but you can approximate it by running two passes: one with only your private loans against the refinance offer, and one with the full set. For the pure avalanche calculation across all loans, see the avalanche-vs-snowball calculator.
Refinance rate examples are illustrative. Actual offers depend on creditworthiness and lender terms. Avalanche ordering assumes minimum payments are maintained on all loans.
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Sources
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Sources: standard avalanche payoff math; ed.gov federal loan protections; r/StudentLoans refinance-vs-avalanche discussions (2024-2026).
- Federal Direct Consolidation Loan interest rate — the weighted average of the loans being consolidated, rounded up to the nearest one-eighth of one percent (Federal Student Aid, studentaid.gov, Loan Consolidation).
- Amortisation, daily interest accrual and payoff arithmetic — standard loan mathematics; every figure on this page is computed from the numbers you enter.