Analysis · The Guardian · 7 April 2026
UK government caps student loan interest rates at 6% from September: What It Means for Your Student Loan
Written by Zubair Arshed FIA, Chartered Actuary
Fellow of the Institute and Faculty of Actuaries
Actuarial Post Life and Health Actuary of the Year 2024
The Guardian reports that student loan interest rates will be capped at 6% from September 2026. For borrowers whose interest currently tracks RPI plus a margin, this puts a ceiling on how fast a balance can grow, though the real winners are narrower than the headline suggests.
This analysis responds to reporting by The Guardian. We recommend reading the original alongside it: UK government caps student loan interest rates at 6% from September ↗
What has actually been reported?
The headline is straightforward: from September, student loan interest will not be allowed to exceed 6% a year. What sits behind that is less simple, because interest on UK student loans is set by different formulas on different plans, and a single cap bites on some of them far harder than others.
A cap like this is not new in principle. The law already contains a "prevailing market rate" safeguard that stops student loan interest from running above comparable commercial rates, and the Department for Education has used it before during periods when RPI spiked. A fixed 6% figure is a clearer, more predictable version of the same idea. It tells you the worst case in advance.
One caution worth holding onto: you are reading the headline and a short snippet, not the detailed policy document. The exact mechanics, which plans are covered, whether the cap is permanent or temporary, and how it interacts with the existing safeguard, will be in the small print. Treat what follows as analysis of what a 6% cap does mechanically, not as a quote from the article.