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Private Loan Research

How to Compare APR, Cosigners, and Repayment on Private Student Loans

Rate comparisons are a starting point, not the whole picture. Here's how to read a private loan offer the right way.

Updated April 9, 20262 min read

When you compare private student loan offers, you'll encounter a range of terms, disclosures, and numbers. Here's how to read them with a clear head.

Start with APR, not interest rate

The Annual Percentage Rate (APR) reflects the interest rate plus any fees, expressed as a yearly rate. Two loans with the same interest rate may have different APRs if one charges an origination fee. APR is the more accurate comparison point.

Understand what the rate range means

Lenders advertise rate ranges like "5.49% – 12.99% APR." That range reflects borrowers across different credit profiles. The rate you receive depends on your credit score (or your cosigner's), your income history, and the lender's underwriting model.

If you check your rate before formally applying, the lender typically uses a soft credit pull that doesn't affect your score. Take advantage of this to see your actual rate, not just the advertised range.

Cosigner dynamics

If a cosigner with strong credit signs onto your loan, you'll typically receive a better rate — sometimes significantly better. The tradeoff is that your cosigner is equally responsible for the debt.

Key questions:

  • Does this lender offer cosigner release?
  • After how many consecutive on-time payments?
  • What is the process for applying?

Not all lenders offer cosigner release. If this matters to your family, filter for lenders that do.

Repayment options

Look for:

  • In-school deferment options (full deferment, interest-only, or flat payment)
  • Post-graduation grace period
  • Hardship or unemployment deferment
  • Income-based repayment (rare in private loans, but some lenders offer it)

The number that matters most

Calculate the total cost of each loan option over your expected repayment period. That number — not the monthly payment — tells you the real cost of each choice.

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Next step

See the real gap across your schools

CollegeLens walks through your award letters the same way this guide does, then compares what you would actually pay at each school.

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