Analysis · IFS | Institute for Fiscal Studies · 7 April 2026
Immediate response to the announcement of a 6% cap on student loan interest rates: 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 Institute for Fiscal Studies has responded to an announced 6% cap on student loan interest rates. On the surface a lower interest rate looks like a straightforward win, but the mechanics of the repayment system mean the cap matters far less than the headline suggests for most people who will never clear their balance before write-off.
This analysis responds to reporting by IFS | Institute for Fiscal Studies. We recommend reading the original alongside it: Immediate response to the announcement of a 6% cap on student loan interest rates ↗
What has actually been announced?
The development here is a proposed cap that would stop student loan interest rising above 6% a year. The IFS has published an immediate response, which is the kind of rapid technical assessment they issue when a government sets out a change to loan terms. I only have the headline in front of me, so I am analysing the cap itself and how it interacts with the existing rules rather than attributing specific numbers to their write-up.
An interest cap does one thing: it prevents the rate charged on your outstanding balance from exceeding a set ceiling. To understand who this helps, you first need to know which plans can charge more than 6% in the first place. Plan 5 (the current system for English students who started from 2023) charges RPI only, so it would only be capped in a year when RPI itself climbs above 6%. Plan 2 charges RPI plus a sliding scale up to 3% for higher earners, and postgraduate loans charge RPI plus 3% flat. Those are the plans where a 6% cap can actually bite.