Learning · official-source review · reviewed 2026-10-10
Students forget that unsubsidized loans accrue interest while they are in school, adding thousands to the balance.
Estimate monthly interest accrual on a student loan at your current rate.
College students with unsubsidized federal or private student loans.
Use the source document or official route that applies to your situation. This guide does not contact another person or verify external information.
Look up the current principal balance on your loan servicer site.
Use the fixed annual rate listed on your loan disclosure.
Multiply balance by rate divided by 12.
Even small interest payments while in school prevent capitalization.
A $5,500 unsubsidized loan at 5.5% accrues about $25 per month, or $300 per year while you are in school.
Use your own source and details. The example is not a record about a real person or organization.
U.S. Department of Education, Federal Student Aid · reviewed 2026-10-10
What this source supports: Federal student loans carry fixed annual interest rates set annually, with different treatment for subsidized and unsubsidized loans.
Source limit: This is a simple interest estimate; capitalization rules differ by loan program.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
This App estimates interest from numbers you enter. It is not financial advice and does not contact your servicer.
This is a simple interest estimate; capitalization rules differ by loan program.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Estimate monthly interest accrual from your loan balance and rate.
This estimates simple interest. It does not replace your servicer statement or give financial advice.
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
The App computes the worked example with your own numbers, in your browser.
APP 1
Estimate monthly interest accrual from your loan balance and rate.
Free · no account · no upload
Open Student Loan Monthly Interest EstimatorThe App runs in this browser. It does not send or save entries. Copy, download, or print only when you choose.
This guide uses short, direct instructions as an ASD-STE100-style writing target. It is not a formal certification.
Companion App: Student Loan Monthly Interest Estimator. It runs in this browser and does not upload your entries.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.