Rate Shopping Without Wrecking Your Credit
This tool helps you keep student loan refinance applications inside the FICO rate-shopping deduplication window so multiple hard inquiries count as one. Enter your first application date and the tool marks the window boundary. FICO models use a 14-to-45-day window depending on version — no single number applies universally. On an $18,000 refinance, shopping within this window protects your score.
Your shopping spread
Inside every window in the documented range — on any scoring model those checks are treated as one shopping event.
Whether those checks count once or separately depends on the scoring model your lender uses. Here is where you stand on each.
- First check
- Last check
- Days apart
- Finish by, on your chosen window
You are inside the -day window with to spare.
You are past the -day window. Later checks may be counted as separate inquiries on that model.
A prequalification that uses a soft pull does not affect your score at all — only hard inquiries do, and the effect is small and temporary next to payment history. The de-duplication window is a documented range (14 to 45 days depending on the scoring model), not a single published number, which is why this page shows the range.
How the FICO Deduplication Window Works
When you apply for a student loan refinance, the lender pulls your credit report, which registers as a hard inquiry. Multiple hard inquiries in a short period can lower your FICO score—unless they fall within the rate-shopping deduplication window. Inside that window, FICO treats all inquiries for the same loan type as a single event.
The catch is that the window length depends on which FICO model version your lender uses. Older FICO models (FICO 8 and earlier) use a 14-day window. Newer models (FICO 9, FICO 10, FICO 10T) use a 45-day window. You generally cannot choose which model a lender pulls, and most lenders do not disclose the model version in advance. The safest strategy is to compress all your applications into 14 days—the narrowest window—so you are protected regardless of the model. The calculator marks both the 14-day and 45-day boundaries from your first application date so you can plan accordingly.
Planning Your Rate-Shopping Sprint
Before your first application, gather everything you need: pay stubs, tax returns, employer verification, and your loan details (balance, rate, servicer). Having documents ready lets you submit multiple applications in quick succession rather than spacing them out over weeks.
Identify three to five lenders whose eligibility requirements you meet—minimum credit score, income, and degree completion. Many lenders offer a soft-pull prequalification that does not affect your score at all. Use prequalification to narrow the field, then submit formal applications to your top choices within a 14-day sprint. On an $18,000 balance, even a quarter-point rate difference saves hundreds over the loan's life, so comparing multiple offers is worth the effort. After you receive all offers, use the refinance break-even calculator to evaluate each one against your current loan, factoring in closing costs, term length, and whether you hold federal loans whose protections you would be giving up.
The FICO deduplication window ranges from 14 to 45 days depending on the scoring model version. This tool marks both boundaries. It does not determine which model your lender uses.
Next in this cluster
Related student loan calculators
Sources
-
Sources: myfico.com rate-shopping guidance; FICO Score documentation (model-version-dependent 14-45 day deduplication window); general lender prequalification practices.
- 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.