Does Bank Rate Affect Your Student Loan?

This article is general information, not financial advice.

Sometimes. Plan 1 and Plan 4 loans are charged the lower of RPI and the Bank of England's Bank Rate plus 1%. Plan 2, Plan 5 and Postgraduate loans follow RPI and have no Bank Rate leg. At the time of writing (02/10/2026) RPI is the lower figure, so a change in Bank Rate does nothing to your loan unless Bank Rate falls a long way.

Which Plans Follow Bank Rate

• Plan 1 (England and Wales if your course started before 1 September 2012, and Northern Ireland): the lower of RPI and Bank Rate + 1%. Charged 4.1% now.
• Plan 4 (Scotland): the same rule as Plan 1. Charged 4.1% now.
• Plan 5 (England, undergraduate courses from 1 August 2023): normally RPI. Charged 4.1% now.
• Plan 2 (England, courses from 1 September 2012 to 31 July 2023, and Wales, courses from 1 September 2012): RPI plus up to 3%, depending on your income. A cap of 6% currently applies.
• Postgraduate Loan: normally RPI plus 3%. The cap is currently applied at 6%.

RPI is a measure of inflation. The Student Loans Company sets the rate each 1 September using the previous March's RPI, and it can change during the year. Plan 5 is charged RPI itself, so the 4.1% GOV.UK publishes for Plan 5 is the RPI figure in force.

When Bank Rate Has Mattered

For two years Plan 1 tracked Bank Rate plus 1%, because inflation was higher. The loan was charged 2.75% from 1 September 2022, when Bank Rate was 1.75%. It was 6.25% from 1 September 2023, when Bank Rate was 5.25%. It dropped to 6% on 30 August 2024, after Bank Rate fell to 5.00% on 1 August. Between those dates it moved with each change in Bank Rate.

Since 1 September 2024 RPI has been the lower leg every year: 4.3%, then 3.2%, now 4.1%. RPI is the number that moves your loan in a normal year, not the Bank of England.

What a Rate Cut Would Do From Here

Bank Rate is 3.75%, so Bank Rate + 1% is 4.75%, 0.65 points above RPI's 4.1%. A rise changes nothing, because the rate can never exceed RPI. A cut changes nothing until Bank Rate falls below 3.10%, the point where Bank Rate + 1% drops under 4.1%.

Three quarter-point cuts, to 3.00%, would give 4.00%: a tenth of a point lower. A fall to 2.00% would give 3.00%. On a £20,000 Plan 1 balance that is £600 of interest a year against £820 at 4.1%, £220 less. That assumes RPI stays at 4.1%, which it will not: it resets every September.

Does the Rate Change What You Pay?

Not directly. You repay 9% of income above your plan's threshold whatever the interest rate, and the Plan 1 threshold is £26,900 a year. On £38,400 that is 9% of £11,500, or £1,035 a year. The rate decides what happens to the balance.

• At 4.1% on £20,000, interest is £820 a year. Repayments only beat that above an income of about £36,011 (£26,900 plus £820 ÷ 9%). Below it the balance grows.
• At 3.0%, interest is £600 and the break-even falls to about £33,567. A lower rate moves the point at which the balance starts to shrink by around £2,400 of salary.
• If the loan will be written off before you clear it, the rate changes nothing you pay. A Plan 1 loan for a course that started on or after 1 September 2006 is written off 25 years after the April you were first due to repay.

Those figures use simple annual interest. In practice interest is added to the balance each month, and the repayment follows your pay.

Where the Answer Changes

• Plan 2 depends on income, not Bank Rate. After you leave your course the rate is RPI for an income of £29,385 or less, rising by up to 1.9 points between £29,386 and £52,884, and capped at 6% from £52,885. While you are employed the Student Loans Company applies RPI only during the tax year, then checks it against your income from HMRC afterwards.
• The caps on Plan 2, Plan 5 and Postgraduate loans are set against comparable market rates, using monthly Bank of England data. That is a rule about market rates, not a Bank Rate formula, so a Bank Rate move does not translate into your rate by arithmetic.
• More than one plan: each loan is charged at its own plan's rate, while you make a single repayment, 9% of income over the lowest threshold of the plans you hold.
• The rate can change mid-year. GOV.UK says the rate is usually set on 1 September but can change during the year, as the 2022 to 2024 history shows.
• Your plan decides everything above. You cannot choose it; it follows where and when you studied, and your online Student Loans Company account shows it.

What CrestCast Does With It

Enter a student loan, pick its plan, and the Plan 1 rate note on the salary screen reads: lower of RPI and Bank Rate + 1%, set each 1 September. The repayment comes out of your pay on the plan's threshold, and the forecast carries the balance. The write-off date is one you enter yourself.

To test a cut, try a Bank Rate what-if. For a Plan 1 loan CrestCast applies the new rate from the first 1 September on or after the change and holds RPI at the published figure, because it has no forecast of RPI and invents none. If the cut is too small to matter it says so, naming RPI as still the lower figure, rather than showing a changed number. The result is saved as a separate version, so your plan does not move.

Two limits. CrestCast's Bank Rate what-if does not yet move a Plan 4 loan, although GOV.UK gives Plan 4 the same rule as Plan 1. And without a what-if the forecast holds your loan at the rate you typed, 4.1% by default, rather than predicting September resets.

The five plans, the repayment thresholds and how a student loan sits beside a mortgage and cards are covered in the debt payoff planner.