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A student loan does not stop you getting a mortgage and it does not appear on your credit file. What it does is reduce the amount lenders say you can borrow, because the repayment comes off your payslip every month and lenders treat it as a regular outgoing in their affordability calculation.
The effect is usually modest. On a £35,000 salary a Plan 2 or Plan 5 repayment is somewhere between £40 and £75 a month, and that knocks a few thousand pounds off the maximum loan rather than tens of thousands.
Why does a student loan not show on my credit file?
Student loans from the Student Loans Company are not consumer credit. They are collected through the tax system by your employer, in the same way as income tax and National Insurance, so the credit reference agencies never see them. You will not find the balance on Experian, Equifax or TransUnion, and a lender does not see it on a credit search either.
Lenders find it in two places instead. The first is your payslip, which shows the deduction each month. The second is the application form, where you are asked to declare it. Leave it off and the underwriter will spot it on the payslip anyway, so declare it.
Is a student loan treated like a credit card or a car loan?
No. A car loan is a fixed commitment with a balance the lender expects you to service in full. A student loan is treated as a deduction from income, closer to tax than to debt. Lenders do not ask how much you owe, only what comes off your pay. Nobody expects you to clear it before applying, and paying it off early to help an application rarely makes sense.
Student loans are not on your credit file, lenders find them on your payslip and the application form
Repayments are 9% of income above the plan threshold, taken monthly, and lenders treat that as an outgoing
On £35,000 the deduction is roughly £40 to £75 a month, cutting borrowing by a few thousand pounds
How much does a student loan reduce what I can borrow?
The starting point is the repayment itself. You pay 9% of everything you earn above the threshold for your plan. Plan 5 covers anyone who started a course in England from September 2023 and the threshold is £25,000. Plan 2 covers English and Welsh students who started between 2012 and 2023 and the threshold for the 2026/27 tax year is £29,385. Scottish and Northern Irish borrowers are on Plan 4 or Plan 1 with lower thresholds.
Take a salary of £35,000. On Plan 5 the repayment is 9% of £10,000, which is £900 a year or £75 a month. On Plan 2 it is 9% of roughly £5,600, about £505 a year or £42 a month. Postgraduate loans add 6% above £21,000 on top.
Lenders then feed that monthly figure into their affordability model. Most do not simply multiply your salary; they work out what is left after tax, National Insurance, the student loan, other credit and a modelled figure for household spending, and check that the mortgage payment fits within it. Because the student loan is a fixed outgoing, every pound of it reduces the disposable income the model has to play with.
As a rough guide, a £75 monthly deduction takes something in the region of £4,000 to £6,000 off the maximum loan for a single applicant at a typical income multiple. A £42 deduction takes off roughly half that. The exact number depends on the lender, the term and everything else on the form, and some lenders’ models are kinder to student loans than others because they treat the deduction as part of net pay rather than as a credit commitment.
What it does not do is change the income multiple itself. If a lender caps at 4.5 times income, that cap still applies to your gross salary. The student loan bites through the affordability model, not the multiple. My how much can I borrow article covers how the two tests fit together.
Should I pay off my student loan before applying for a mortgage?
Usually not, and lenders do not expect it. The repayment stops the moment your income drops below the threshold, the balance is written off after 30 or 40 years depending on the plan, and clearing it does nothing for your credit file because it was never on there.
The trade-off is straightforward. Paying off a £20,000 balance would remove a £75 monthly deduction and add perhaps £5,000 to your maximum loan. Keeping the £20,000 as deposit instead could add £80,000 to your purchasing power at a 75% loan to value, or drop you into a lower loan to value band with a cheaper product. For most people the deposit wins by a distance, but the right answer depends on the balance, the salary and the plan.
Where the calculation changes is a small remaining balance. If you owe £1,500 and it will clear within the year, some lenders will ignore it if you can show it ends before the mortgage starts, though not all will. A voluntary lump sum to finish it off is worth asking about rather than assuming.
One more point for joint applications. Two student loans on two payslips are two deductions, and the affordability model takes both. Two graduates on £35,000 each with Plan 5 loans have £150 a month coming off before the model starts, which is noticeable but rarely the difference between an approval and a decline.
Speak to an expert
If you want to know how your student loan changes the number, send me your latest payslip and your plan type and I will run it through the lenders that treat it most sensibly.
What else should I check before applying?
The student loan is rarely the thing that limits a graduate’s first mortgage. Deposit, other credit and the size of the salary matter more, so check those first.
Make sure the plan type on your application matches your payslip. Plan 2 and Plan 5 repayments differ by about £30 a month on the same salary, and an underwriter who sees a mismatch will query it and slow the case down.
If you have recently changed jobs, wait for the first payslip in the new role. The most common delay I see on employed cases is an application submitted before that payslip exists, and the student loan deduction is one of the figures the underwriter wants to see on it.
Run the numbers before you view anything. My borrowing calculator gives a rough range, and the first-time buyer hub covers deposits, schemes and the order to do things in.
Lastly, if your income is close to the threshold, the deduction may be tiny or nil, and a pay rise that pushes you over it will introduce a deduction the lender has not seen yet. Lenders work from the payslips in front of them, so time the application around a known salary rather than a promised one.
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