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One of the biggest concerns parents have about student finance is seeing a loan balance that can run into tens of thousands of pounds. It sounds alarming, but student finance works very differently from a bank loan or mortgage.

Instead, repayments are linked to earnings. Graduates only repay when their income reaches a certain level, and the amount they repay depends on what they earn, not how much they borrowed.

This guide follows the repayment journey, from graduation through the first repayment to the point where any remaining balance is written off.

The timeline below shows the repayment student loan journey at a glance. Take a moment to explore it, then we will look at what happens at each stage.

During university, students may take out loans for tuition fees, living costs, or both. Many parents assume repayments begin as soon as their child graduates, but repayments don't start straight away.

Repayments only begin from the April after students finish their course, and only if their earnings are above the repayment threshold. If they earn less than the threshold, they won't make any repayments.

A common misconception is that graduates repay 9% of everything they earn, which would obviously amount to a significant slice of their income. In reality, repayments are usually much smaller than many people expect because they're only calculated on the portion of income above the repayment threshold. Once earnings exceed the threshold, repayments are usually collected automatically through PAYE, alongside Income Tax and National Insurance.

The easiest way to understand this is with a worked example. Imagine a graduate earning £30,000 a year, with a repayment threshold of £25,000.

Although they earn £30,000, only £5,000 is above the repayment threshold. Their repayments are calculated on that £5,000, not their full salary.

At a repayment rate of 9%, they would repay £450 over the year, or about £37.50 a month.

If their salary increases, repayments gradually increase too. If their earnings fall below the threshold, repayments stop automatically until their income rises again.

Many graduates won't repay everything they borrow. Under the current Plan 5 system, any remaining balance is written off after 40 years, even if it hasn't been repaid in full.

Much of the confusion about student finance comes from comparing it with other forms of borrowing.

A larger loan doesn't mean larger monthly repayments. Two graduates earning the same salary will repay the same amount, even if one borrowed much more than the other.

Interest doesn't affect monthly repayments. Interest changes the outstanding balance, but not the amount deducted from a graduate's pay each month.

Repayments aren't fixed. They automatically increase or decrease as earnings change.

Repayments are usually automatic. For most employees, deductions are made through payroll, so there's nothing to arrange.

Many graduates won't repay the full balance. Because repayments depend on earnings and loans have a write-off date, many people won't repay everything they borrowed before the remaining balance is written off.

Student finance repayments are based on what a graduate earns, not how much they borrowed. Graduates only repay when their income exceeds the repayment threshold. If earnings fall below it, repayments stop automatically, and any remaining balance is written off at the end of the repayment term.

The most important takeaway is that student finance doesn't work like a bank loan or mortgage. It’s better understood as an income-linked repayment system than a conventional loan. Some people compare it to a tax because repayments are linked to earnings and, for most employees, are deducted automatically through PAYE. However, student finance remains a loan with its own repayment rules and write-off terms.

Student finance looks more complicated than it actually is. If there's one idea to remember, it's this: student finance repayments are based on earnings, not the size of the loan. Once you understand that, almost every other repayment rule falls into place.

Look out for more Uni Money guides from OffToUni, where we'll explore topics including living costs, parental contributions and other practical aspects of paying for university, helping you support your child with confidence.

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