The government has moved to cap the maximum interest rate on millions of student loans at 6% for the coming academic year, citing the economic fallout from overseas conflict as the primary reason for the intervention.
Ministers announced the temporary cap for the 2026-27 year, running from 1 September to 31 August 2027, stating the aim was to protect students and graduates from “global shocks.” They specifically said borrowers should not “pay the price for a war which the UK has no direct involvement in,” an explicit reference to concerns that the ongoing conflict in the Middle East will push inflation higher.
How the cap changes the existing system
The cap applies to England’s controversial Plan 2 undergraduate loans, taken out by students who started university between September 2012 and July 2023, and to Plan 3 postgraduate loans. Currently, interest on these loans is set using the Retail Price Index (RPI) measure of inflation, with an additional 3% added for many borrowers.
With the current March RPI rate at 3.2%, higher-earning Plan 2 graduates and all postgraduate borrowers currently face a 6.2% interest rate. Under the existing rules, if RPI rises, so too does the total interest charged. The new 6% maximum overrides this formula for one year.
The inflation link to geopolitical tension
The government acted ahead of the publication of the critical March 2026 RPI figure, due on 22 April. That figure is used to set student loan interest for the academic year starting the following September. Most economists believe it will be significantly higher than last March’s 3.2%, partly due to the impact of the war on global energy and supply chains.
Sanjay Raja, chief UK economist at Deutsche Bank, forecast the March RPI figure would be 3.88%, while the wider market predicted 4.08%. The rate for February 2026 had already risen to 3.6%. Without the cap, a March RPI of 4% would have meant a maximum interest rate of 7% for higher earners and postgraduates.
Who gains, who pays more, and why monthly bills don’t change
The impact of the cap is uneven, creating clear winners and losers depending on a graduate’s income. Crucially, the interest rate change does not affect the amount deducted from pay each month, which is determined solely by earnings over a set threshold. It affects how quickly the total debt grows.
Using a scenario where March RPI is 4%, the effects break down as follows. For a Plan 2 borrower on a low income, below £29,385, their interest rate will rise from 3.2% to 4%. The cap does not protect them, as their rate is RPI-only.
For a high-earning Plan 2 graduate on £52,885 or more, the cap provides a direct benefit. Their rate will be limited to 6%, instead of rising to 7%. The Institute for Fiscal Studies estimates this could reduce total expected lifetime loan repayments for such an individual by about £500 in today’s prices.
For those earning between the lower and upper thresholds, the outcome is mixed. Most would see their variable interest rate rise, but a few at the very top of that band would see a slight reduction due to the 6% ceiling.
All Plan 3 postgraduate borrowers will benefit, as their loans would otherwise be subject to an RPI + 3% rate, which would also exceed 6%.
Tom Allingham, a student loans expert from Save the Student, emphasises that for the majority of Plan 2 borrowers, who will not repay their loans in full before the 30-year write-off, “this cap will only have a material financial impact on the highest earners, who will now clear their debts slightly earlier.” For others, a lower interest rate merely reduces the amount eventually written off by the Treasury.
Political and expert reaction to a ‘stopgap’ measure
The Labour government has presented the cap as a protective measure, acknowledging it is a temporary fix and not a “silver bullet” for systemic issues. However, the policy has drawn criticism from across the political spectrum.
The Conservative opposition accused Labour of “tinkering around the edges” of a broken system. Experts have echoed the sentiment that the move is a limited intervention. Nick Hillman, director of the Higher Education Policy Institute, described it as a “stopgap.”
The announcement comes against a backdrop of long-standing criticism that the Plan 2 loan system acts as a “debt trap,” with interest causing debts to balloon beyond the sums originally borrowed. The government has previously intervened to cap rates, such as in 2022-23 when the formula could have produced a 12% rate.
Further context is provided by the continued use of RPI itself to calculate interest. The Office for National Statistics discourages the use of RPI, as it is typically higher than the Consumer Prices Index (CPI) measure of inflation. The repayment threshold for Plan 2 loans in England was recently increased to £29,385 and is set to be frozen for three years from April 2027.
