Why Student Loan Is Deducted From Your UK Payslip

The first time you see a student loan line on your payslip, it can be jarring. You have started a graduate job, you are finally earning a real salary, and there it is: a deduction you barely thought about during your degree. The amount changes when you get a bonus, stops when you change jobs mid-year, and sometimes looks wrong entirely. Understanding how PAYE student loan deductions work saves you from unnecessary panic and helps you budget accurately from month one.

This guide explains the full PAYE deduction process: what your employer does, what HMRC and the Student Loans Company do, and how to verify the figures. Use our UK student loan calculator to check what your deduction should be based on your annual salary and plan type.

How PAYE student loan deductions work

Student loan repayments are collected through the same payroll system as income tax and National Insurance. Your employer calculates the deduction each pay period based on your gross pay for that period, applies the 9% rate (or 6% for postgraduate loans) to earnings above the plan threshold, and sends the money to HMRC along with your tax and NI. HMRC then passes student loan repayments to the Student Loans Company (SLC).

You do not need to set up a standing order or make manual payments if you are employed and paid through PAYE. The system is automatic from the April after you graduate, provided your employer has been told you have a student loan. This notification comes through the P45 from a previous employer, the starter checklist (previously P46) for a first job, or the P6/P9 coding notice from HMRC.

Calculating the deduction each pay period

Payroll software uses the annual threshold and divides it by the number of pay periods to get a per-period threshold. For Plan 2 in 2025/26, the annual threshold is £27,295. On a monthly payroll, the monthly threshold is £2,274.58. If your gross monthly pay is £2,800, the deduction is 9% of £525.42, which is £47.29.

When you receive a bonus, the deduction is calculated on the total gross pay for that period including the bonus. A £3,000 monthly salary plus a £5,000 bonus gives gross pay of £8,000 for the month. The deduction is 9% of £8,000 minus £2,274.58, which is 9% of £5,725.42, equalling £515.29 for that month alone. This is why bonus months produce noticeably higher student loan deductions, and it catches many graduates off guard.

Verify your expected deduction with our UK student loan calculator and cross-reference against your UK salary calculator to see the combined effect of tax, NI and student loan on your take-home pay.

What your employer is responsible for

Your employer's obligations are limited but important. They must report the correct plan type to their payroll system, deduct the right amount each pay period, and include student loan repayments in their monthly Full Payment Submission (FPS) to HMRC. They are not responsible for tracking your outstanding balance, applying interest, or telling you when your loan is paid off.

When you start a new job, you should tick the relevant student loan box on the starter checklist to tell your employer which plan to deduct. If you tick the wrong box, or your employer uses the wrong plan code, you may overpay or underpay. Underpayments are caught eventually through HMRC's end-of-year reconciliation, at which point you receive a bill. Overpayments are refunded.

Common payslip issues and fixes

• Wrong plan code: contact payroll with your correct plan from the SLC portal
• Deduction when earning below threshold: may be due to bonus or incorrect tax code
• No deduction despite earning above threshold: employer may not have your loan flagged
• Two deductions showing: you may have both an undergraduate and postgraduate loan
• Deduction continues after loan paid off: contact SLC with your P60 to request a stop

Self-assessment and non-PAYE income

If you are self-employed or have significant income outside PAYE (rental income, dividends, freelance work above £1,000), student loan repayments are calculated through self-assessment instead. On your SA return, you report total income, and student loan repayments are calculated on income above the annual threshold for your plan. The repayment is included in your January 31 balancing payment alongside income tax.

Having both employed and self-employed income can mean repayments are deducted twice if you are not careful. PAYE handles the employed portion, and self-assessment handles the total income picture. HMRC reconciles the two, but overpayments through PAYE while also paying via self-assessment do happen. Keep records and check your SLC account annually.

When deductions stop

Deductions stop automatically when your income falls below the threshold for a given pay period. They also stop when your loan is fully repaid or written off. If you overpay through PAYE (common when you receive a large bonus early in the tax year), HMRC refunds the excess after the annual reconciliation in the following summer. If you voluntarily overpay directly to the SLC, tell your employer or HMRC to avoid double payment.

For details on when your loan is cancelled entirely, including the write-off dates for each plan, read our guide on when UK student loans are written off. For a full comparison of plan thresholds and rates, see our student loan repayment plans guide.

The payslip deduction is the most visible part of student loan repayment, but it is only the collection mechanism. The rules that determine how much you pay over your lifetime depend on your plan type, your earnings trajectory, and the write-off date. Check your SLC balance once a year, verify your payslip deduction against our UK student loan calculator, and flag any errors to your payroll team promptly.

Multiple jobs and changing employers

If you hold two jobs, student loan deductions are taken from each payslip independently. If both jobs pay above the per-period threshold, you may overpay relative to your combined annual income. HMRC reconciles this after the tax year and issues a refund if total deductions exceeded what was due on your total earnings. The reverse can also happen: if each job pays below the threshold individually but combined income exceeds it, you may underpay through PAYE and receive a bill through self-assessment or the P800 reconciliation process.

When you change employers, your new employer needs your correct plan type from day one. Bring your P45 or complete the starter checklist accurately. A gap between jobs where you earn nothing means no deductions for those weeks, which is correct. When you start again, deductions resume from the first payslip where earnings exceed the per-period threshold. Keep payslips from every employer during the tax year so you can verify the annual total against your SLC statement.

Salary sacrifice and student loans

Salary sacrifice arrangements for pensions reduce your gross pay, which can bring your earnings below the student loan threshold and reduce or eliminate deductions for that pay period. If you sacrifice £200 per month into a pension and your gross pay drops from £2,500 to £2,300, your Plan 2 deduction falls because the sacrifice reduced the earnings figure payroll uses. This is a legitimate planning point, though the pension contribution itself is not deductible for student loan purposes in the same way it is for income tax.

The effect is modest for most graduates but worth understanding if your employer offers salary sacrifice and you are close to the repayment threshold. Your student loan deduction is always calculated on post-sacrifice gross pay, not your notional salary before the sacrifice. Check the combined effect on take-home pay using our UK salary calculator with student loan repayments enabled.

What to do if your deduction looks wrong

Start with your payslip and the SLC annual statement. Compare the plan code on your payslip (SL Plan 1, SL Plan 2, etc.) against your SLC account. If the code is wrong, speak to payroll immediately. If the amount looks too high, check whether a bonus or overtime in that pay period pushed earnings above the threshold for a larger-than-usual deduction. If the amount is too low or zero despite earnings above the threshold, your employer may not have your loan flagged on their payroll system. Resolving these issues quickly keeps your repayment record accurate and avoids surprises at year end.

HMRC's end-of-year reconciliation (P800) catches most systematic overpayments and underpayments, but waiting for that process means months of incorrect deductions. Proactive checks save hassle. Contact the SLC helpline on 0300 100 0611 if payroll cannot resolve the issue, and keep a record of every call and correspondence. Our UK student loan calculator gives you the expected figure to quote when raising a query. Acting early prevents small errors from compounding across a full tax year and ensures your payslip reflects what you actually owe.