Last reviewed: June 2026
TL;DR- Student loan repayments are deducted as a committed monthly outgoing in mortgage affordability assessments, reducing the maximum loan available.
- The total outstanding student loan balance is not directly assessed - only the monthly repayment amount matters for affordability purposes.
- Different repayment plans (Plan 1, 2, 4, 5, Postgraduate) produce different monthly repayment amounts at the same income level.
- Paying off student loans before a mortgage application rarely makes financial sense - the monthly repayment saving is modest and writing off future debt forgiveness is typically costly.
How Student Loans Affect Mortgage Affordability
Student loans in the UK are repaid through the PAYE system as a deduction from income above a threshold that depends on the repayment plan type. The monthly repayment appears on payslips as a deduction from gross pay. Mortgage lenders treat this deduction as a committed monthly outgoing - in the same way as a minimum credit card payment or personal loan payment. The monthly student loan repayment reduces the assessable disposable income used in the affordability calculation.
The total outstanding student loan balance - which may be tens of thousands of pounds - is not directly used in the mortgage assessment. The balance does not appear on the credit file and is not treated as a credit liability in the same way as a bank loan. Only the monthly repayment amount matters.
Student Loan Plan Types and Monthly Repayments
The monthly student loan repayment depends on the plan type and the borrower's income:
- Plan 1 (pre-2012 English and Welsh loans, Scottish and Northern Irish loans): repay 9% of income above the Plan 1 threshold.
- Plan 2 (post-2012 English and Welsh loans): repay 9% of income above the Plan 2 threshold.
- Plan 4 (Scottish loans from 2021-22 onward): higher income threshold; 9% above the threshold.
- Plan 5 (loans from 2023-24 onward for English students): lower threshold, 40-year repayment period.
- Postgraduate Loan: 6% of income above the postgraduate threshold.
Current thresholds and rates should be confirmed via the Student Loans Company and GOV.UK, as they are updated annually. The monthly repayment for most graduates is typically £65-£200 per month depending on income and plan type.
Should I Pay Off My Student Loan Before Applying?
Paying off a student loan in full before a mortgage application reduces the monthly committed outgoing by the repayment amount. On a mortgage, this frees up that amount in the affordability assessment and may increase the maximum loan by approximately 4-4.5 times the annual repayment saving. However, the cost of clearing the student loan (the outstanding balance, potentially many thousands of pounds) must be weighed against the benefit. For Plan 2 and Plan 5 borrowers, the loan is written off after 30 or 40 years respectively - voluntarily repaying may mean paying off a debt that would otherwise be forgiven. The decision requires careful modelling of the specific loan balance, interest rate and expected future income.
Frequently Asked Questions
Does a student loan appear on a credit file?
No. UK student loans administered by the Student Loans Company do not appear on credit reference agency credit files. The loan does not show as a liability on the credit file and does not directly affect the credit score. The monthly repayment, however, is visible to lenders because it appears on payslips as a deduction - lenders see this and include it in the affordability calculation.
What if my student loan repayments will stop before the end of my mortgage?
If the student loan will be paid off (or written off) before the end of the mortgage term, some lenders will project the future income without the student loan deduction and use that in their affordability calculation. This can increase the maximum loan available. The lender's approach to future income changes should be confirmed with the broker - not all lenders factor in the end of student loan repayments in their current assessment.
I have both a Plan 2 and a Postgraduate Loan - are both counted?
Yes. All active student loan repayments that appear on payslips are counted as committed expenditure. Both the Plan 2 and Postgraduate Loan repayments are deducted in the affordability assessment. The combined monthly repayment of both plans at a given income level is the figure that reduces assessable disposable income.
Can I defer my student loan repayments before applying for a mortgage?
UK student loan repayments cannot be voluntarily deferred without a qualifying reason (such as income falling below the threshold). Repayments are automatic once income exceeds the plan threshold. If income does fall below the threshold (for example, due to a period of self-employment with low profits), repayments stop automatically and are not a committed outgoing during that period.
