The confusion we are trying to fix
There are five UK student loan repayment plans running at once. Plan 1, Plan 2, Plan 4 for Scottish borrowers, Plan 5 for students who started from 2023, and the separate Postgraduate Loan plan. Each has its own repayment threshold and its own write-off period.
A striking number of borrowers do not know which plan they are on, and the plan makes a very large difference. StudentLoanCalc was built to remove that guesswork.
What the calculator does
Enter your salary and your plan, and it shows what you repay monthly and annually. Repayment is a fixed percentage of income above the threshold, not of your whole salary, which is the single most commonly misunderstood part of the system. Someone earning just above the threshold repays very little, and the calculator makes that visible immediately.
It also handles the case where you are repaying an undergraduate and a postgraduate loan simultaneously, which stacks two separate deductions.
Thresholds and where they come from
Repayment thresholds come from published GOV.UK figures for the current tax year and change each April. We update them when new figures are announced and label which year the calculator is using, because an out of date threshold produces a confidently wrong answer.
Who publishes this site
StudentLoanCalc is built and maintained by CJ Software Ltd, a UK software company that develops a small family of free, single-purpose calculators. We are a software business, not a financial advice service, and we say so plainly because it matters when you decide how much weight to give a number on a screen.
The site is funded by advertising. Advertisers have no influence over the calculations, the guidance, or what we choose to write about.
What it cannot tell you
The calculator shows what you repay at a given salary today. It does not forecast your total lifetime repayment, because that depends on your future earnings, on interest rates that vary with RPI and with your income, and on whether your balance is written off before you clear it. Any tool claiming to predict that precisely is guessing.
It also cannot advise on whether to overpay. For many borrowers overpaying is a poor decision, because the loan behaves more like a graduate contribution than a conventional debt and is written off after a set period. Whether that applies to you depends on your plan, your balance and your expected earnings.
For your actual balance and plan type, check your Student Loans Company account. If you spot an error in our figures, please get in touch.