Wayli Guide

Why two graduates on the same salary can repay very different amounts

Salary is only one part of the student loan system. Each graduate's repayment plan, thresholds and future earnings can change how much they repay over time.
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Different repayment thresholds

Repayments begin at different income levels depending on which student loan plan you're on.

Different loan rules

Interest rates and write-off rules vary between plans, affecting the balance and the total you may repay over time.

Future earnings

Two people earning the same today may follow very different repayment paths over time.

Why does this happen?

Student loan plans were introduced at different times and each follows its own repayment rules.

Two people earning exactly the same salary may therefore have different deductions because their repayment thresholds and plan rules are different. Interest and write-off rules can then lead to different balances and lifetime totals.

That's why salary alone doesn't tell you either the exact deduction on every payslip or how much you'll repay over the lifetime of your loan.

Example: two borrowers earning £45,000

Even on the same salary, different repayment plans can produce different repayments because the thresholds and rules are not the same. Find out which student loan plan you're on.

PlanRepayment thresholdRate above thresholdWrite-off
Plan 1£26,9009%25 years*
Plan 2£29,3859%30 years
Plan 5£25,0009%40 years

The thresholds shown are the current 2026–27 UK annual figures. At £45,000, each plan example is above its listed annual threshold, but the actual deduction also depends on how often you are paid and whether you have another plan. Write-off timing can depend on when your first loan was paid, so the Plan 1 figure is a simplified example rather than a universal rule. Check the latest official guidance for your plan: how much you repay and when a loan is written off.

Key takeaway

The same salary does not guarantee the same deduction or lifetime total. Your student loan plan is just as important as your income when understanding what may happen over time.

What this means

Your salary is only one part of the student loan system. Your repayment plan, interest and write-off rules all influence how much you ultimately repay.

Key insight

Two people earning exactly the same salary today can have different deductions and different long-term outcomes because plan thresholds, interest and write-off rules are not the same.

Frequently asked questions

Does the same salary always mean the same repayment?

No. Your plan and pay-period threshold affect the deduction from your earnings. Interest and write-off rules can also affect the balance and the total you may repay over time.

Should I overpay on £45k?

Possibly. It depends on whether full repayment already looks realistic.

How do I check my own situation?

Check your plan and the latest official thresholds first, then use a calculator that compares your plan, salary, balance and overpayment options.

Need your own numbers?

Use the calculator when the answer depends on your plan, earnings, balance and time until write-off.

Calculate my outcome