Independent briefing · 6 minute read

Plan 4 student loans explained

Understand Plan 4 repayments, interest and write-off rules for SAAS-funded loans in Scotland.

Editorial record

Last reviewed: 30 July 2026
Purpose: General information, independently produced

Who is on Plan 4?

You are on Plan 4 if your student funding came from SAAS in Scotland. That covers Scottish undergraduate borrowing and Scottish postgraduate borrowing funded by SAAS. Both normally repay on Plan 4.

Your funding authority decides the repayment plan, not where you live or work now. Moving to England, Wales or Northern Ireland after graduating does not switch you onto Plan 2 or Plan 5.

Scottish postgraduate borrowing on Plan 4 is not the same product as the separate England and Wales Postgraduate Loan. Do not treat them as interchangeable.

If you were funded in England or Wales instead, see our Plan 2 guide or Plan 5 guide. Not sure Plan 4 is yours? Work through which plan am I on.

Plan 4 repayment threshold for 2026/27

For the 2026/27 tax year the Plan 4 repayment threshold is £33,795 a year (£2,816.25 a month on the official monthly payroll figure). You only repay when your income is above that threshold.

You repay 9% of income above the threshold, not 9% of your whole salary. A £40,000 salary does not mean you hand over £3,600 a year.

Worked example: on a salary of £40,000 you repay 9% of £6,205 (the amount above £33,795). That is about £558.45 a year, or roughly £46.54 a month.

These figures come from the calculator's verified repayment rules for tax year 2026/27, checked as of 5 October 2026. Interest rules use academic-year periods, which is a separate timetable from the tax-year threshold.

Plan 4 interest rate

Plan 4 interest is the lower of RPI or Bank Rate plus 1%. RPI for student loans is normally taken from the previous March and applied for the academic year. Bank Rate can change during the year, so the charged rate is not locked as a fixed academic-year figure in the same way a pure RPI rate would be.

The live calculator's verified snapshot for 5 October 2026 uses 4.1% for Plan 4. That is the rate in force for the current academic year.

The 2027/28 rate has not been announced yet. Rates change every 1 September and are set from the Retail Price Index measured the previous March, so the 2027/28 figure follows the March 2027 RPI and is confirmed before that academic year begins. We publish it here once it is confirmed.

Calculator projections hold the verified snapshot (as of 5 October 2026) constant unless you change the advanced assumptions yourself. They do not automatically follow later Bank Rate decisions.

Write-off rules

By default this write-off estimate assumes your first loan payment was on or after 1 August 2007. Older Scottish loans can be written off at age 65 or after 30 years, whichever comes first.

The graduation year you enter is used for the newer-cohort 30-year write-off estimate, and still sets the April repayment start used by the older-cohort “earlier of” model.

If your first loan payment was before that cutoff, tick the older-cohort option below and enter your date of birth. The live calculator exposes that option under Plan 4 so the earlier-of age-65 or 30-years rule can be modelled when those facts are known.

Official detail: Official GOV.UK write-off rules.

Plan 4 and postgraduate study

If SAAS funded your postgraduate study in Scotland, that borrowing normally stays on Plan 4. It is part of the same Scottish repayment plan family as undergraduate Plan 4 loans.

Do not combine it with the calculator's separate England and Wales Postgraduate Loan toggle. That toggle is for the England/Wales postgraduate product only and is switched off for Plan 4. See our Postgraduate Loan guide for how that separate product works.

Calculator limitations

The calculator does not currently model Scottish Income Tax bands for take-home pay. Plan 4 loan repayments themselves are still calculated from the verified Plan 4 repayment rules (threshold and 9% above it).

Forecast interest rates and thresholds are held constant at the verified snapshot unless you change the advanced assumptions. Outcomes are illustrative estimates, not personalised financial advice.

Official sources

Figures on this page follow the calculator's verified rules, last checked 5 October 2026. Useful official pages:

Ready to see figures for your salary and balance? Open the student loan calculator with Plan 4 selected, then replace the example values with your own.

Related briefings

This is general information, not financial advice. Check GOV.UK for the official rules that apply to your circumstances.