Student Loan Repayments Guide

UK student loan repayments are deducted from your pay once your income rises above the threshold for your repayment plan. The amount you repay depends on your plan type, earnings and whether you also have a postgraduate loan.

This guide explains Plan 1, Plan 2, Plan 4, Plan 5 and Postgraduate Loan repayments, how deductions are calculated, and how student loans affect take-home pay.

1. How Student Loan Repayments Work

Student loan repayments are usually deducted automatically through payroll when your earnings are above the repayment threshold for your plan.

Repayments are based on income above the threshold, not your full salary. If your income is below the threshold, no repayment is normally due through payroll.

Student loan repayments are separate from Income Tax and National Insurance.

2. Student Loan Repayment Plans

The UK has several repayment plans, and the plan you are on depends on when and where you studied.

• Plan 1 – usually older loans for certain students in England, Wales and Northern Ireland.
• Plan 2 – commonly applies to many English and Welsh students who started undergraduate courses from 2012 onwards.
• Plan 4 – applies to many Scottish student loans.
• Plan 5 – applies to newer English undergraduate loans from the relevant start date.
• Postgraduate Loan – applies separately to eligible postgraduate borrowing.

You can have more than one loan type, especially if you have an undergraduate loan and a Postgraduate Loan.

3. Repayment Thresholds

Each repayment plan has its own income threshold. You only repay when earnings exceed the threshold for your plan.

Thresholds can change between tax years, so SalaryHub stores them in tax-year configuration data rather than relying on one fixed value.

This helps the calculator estimate repayments using the selected tax year.

4. How Student Loan Deductions Appear on Payslips

If repayments are deducted through payroll, your payslip may show a student loan deduction as a separate line.

Your employer does not decide your student loan plan. Payroll applies the plan details provided through HMRC or the Student Loans Company process.

If deductions look wrong, check your repayment plan and speak to payroll or the Student Loans Company as appropriate.

5. Postgraduate Loan Repayments

Postgraduate Loans are usually repaid separately from undergraduate student loans.

This means someone with both an undergraduate loan and a Postgraduate Loan may have two separate deductions from pay.

The combined effect can be significant, so it is useful to include both when estimating take-home pay.

6. Bonuses, Overtime and Irregular Pay

Student loan deductions can increase in months where you receive extra pay, such as bonuses, overtime or commission.

This is because repayments are based on earnings in the relevant pay period. A large bonus can push pay above the threshold for that period and create a larger deduction.

Use our Bonus Calculator to estimate the net impact of a bonus payment.

7. How Student Loans Affect Take-Home Pay

Student loan repayments reduce take-home pay once your income is above the repayment threshold.

They do not usually reduce your Income Tax or National Insurance. Instead, they are an additional deduction after those calculations.

This is why two people on the same salary can have different take-home pay if one has a student loan and the other does not.

8. How to Estimate Student Loan Repayments

To estimate student loan deductions, you need to know your salary, pay frequency, tax year and repayment plan.

SalaryHub can include Plan 1, Plan 2, Plan 4, Plan 5 and Postgraduate Loan deductions in take-home pay estimates.

Frequently Asked Questions

Do student loans reduce taxable income?

No. Student loan repayments are generally calculated separately and do not reduce Income Tax or National Insurance.

Why did my student loan deduction increase this month?

It may be because you received overtime, a bonus, commission or other extra pay in that period.

Can I have more than one student loan deduction?

Yes. For example, you may have an undergraduate loan and a Postgraduate Loan deduction.

Does everyone with a student loan repay through payroll?

Employees usually repay through payroll when earnings are above the threshold. Self-employed workers usually deal with repayments through Self Assessment.

Final Thoughts

Student loan repayments can make a noticeable difference to take-home pay, especially where bonuses, postgraduate loans or multiple loan plans apply.

Using a salary calculator that includes the correct student loan plan can help you understand what you are likely to receive after deductions.