Who should actually consider making student loan overpayments?

Overpaying only makes financial sense for high-earning graduates who are virtually guaranteed to repay 100% of their principal and accrued interest before their statutory write-off date. In those cases, high compounding interest rates (up to 7.3% or more on Plan 2) can mean that clearing the balance early saves significant total lifetime cash.

What are the 2026/27 student loan repayment thresholds?

For the 2026/27 tax year, the repayment thresholds are: Plan 1 is £26,900; Plan 2 is £29,385; Plan 4 (Scotland) is £33,795; Plan 5 is £25,000; and Postgraduate Loans are £21,000. Deductions are 9% of earnings above the threshold for undergraduate plans and 6% for postgraduate loans.

How does Plan 5 differ from Plan 2 regarding overpayments?

Plan 5 (for students starting university in England in autumn 2023 or later) has a lower repayment threshold of £25,000 (frozen until 2027), charges interest pegged only to RPI inflation (no +3% surcharge), but extends the write-off horizon to 40 years instead of 30 years. Because graduates will make payments for 10 additional years, a much higher percentage of Plan 5 borrowers are projected to repay in full, increasing the viability of early overpayments for middle and high earners.

What should I do with spare money instead of overpaying my student loan?

For most UK graduates, surplus funds generate vastly superior financial returns when allocated to: (1) Maximising workplace pension contributions or personal SIPPs (which receive immediate 20%, 40%, or 45% tax relief and potential employer matching); (2) A tax-free Stocks & Shares ISA for long-term compounding growth; or (3) Saving for a home deposit or overpaying a commercial mortgage that cannot be written off.

Can HMRC or the Student Loans Company (SLC) refund voluntary overpayments?

No. Voluntary overpayments made directly to the Student Loans Company cannot be refunded if you later change your mind, suffer a loss of income, or realize you will not clear the loan before the statutory write-off date. Once paid, the money is permanently gone.

Statutory 2026/27 SLC Write-Off Simulation Engine

Student Loan Overpayment Calculator UK

Calculate whether voluntary student loan overpayments make financial sense or are 100% wasted money. Simulate mandatory PAYE deductions, interest rates, and statutory 30-year write-offs across Plans 1, 2, 4, 5 and Postgrad.

30 & 40-Year Write-OffsIncome-Contingent PAYE2026/27 Thresholds

Compare Graduate Overpayment Profiles (2026/27 Rules):

Your Student Loan & Career Trajectory

Simulate mandatory PAYE deductions vs statutory write-off cancellation.

Student Loan Plan Type

Outstanding Balance (£)

Current Gross Salary (£)

Expected Annual Salary Growth (%)

Inflation plus career progression.

Years Remaining Until Write-Off

Standard term is 30 years.

Hypothetical Voluntary Lump Sum Overpayment (£)

Test whether putting £5,000.00 extra towards your loan actually saves you money or is wasted.

Official Overpayment VerdictPlan 2 (2012–2023 Undergrad)

DO NOT OVERPAY

Under your salary trajectory, an estimated £174,856.91 of debt will be written off for free by the government at year 26. Any voluntary payment of £5,000.00 is 100% dead money that saves £0.

Probability of Clearing Loan Before Write-Off:85%

Lifetime Financial Outcome Comparison

Baseline (PAYE Only)

Total Repaid: £61,375.37

Debt Written Off: £174,856.91

With £5,000.00 Extra

Total Repaid: £66,375.37

Debt Written Off: £143,627.57

Better Alternative for Your £5,000.00

Rather than putting £5,000.00into a student loan that will likely be wiped, putting it into a pension gives you instant tax relief (turning £5,000 into £6,250 or £8,333), or a Stocks & Shares ISA compounding tax-free.

Economic Reality

Why UK Student Loans Are Not Real Debt

UK student loans are widely misunderstood because they carry the word 'loan'. In reality, they operate as an income-contingent graduate tax. Unlike a credit card, personal loan, or mortgage, the size of your student debt has absolutely zero impact on your monthly repayments.

Whether you owe £20,000 or £80,000 on Plan 2, if you earn £35,000, your mandatory deduction is exactly the same: £42.11 per month (9% of earnings over £29,385). Furthermore, if your earnings drop below the threshold, your payments stop immediately, and after 30 years (or 40 years for Plan 5), HMRC and the Student Loans Company wipe whatever debt remains.

UK Student Loan Plans & Statutory Write-Off Rules

Plan Type	2026/27 Threshold	Deduction Rate	Write-Off Period
Plan 2 (English/Welsh 2012–2023)	£29,385 / yr	9%	30 years post-graduation
Plan 5 (English 2023 onwards)	£25,000 / yr	9%	40 years post-graduation
Plan 1 (Pre-2012 / NI)	£26,900 / yr	9%	25 years or age 65
Plan 4 (Scotland)	£33,795 / yr	9%	30 years or age 65
Postgraduate Loan	£21,000 / yr	6%	30 years post-graduation

The 'Dead Money' Overpayment Trap

Government data consistently reveals that only a minority of Plan 2 graduates will ever repay their loans in full before the 30-year statutory cancellation. The Institute for Fiscal Studies (IFS) estimates that over 70% of Plan 2 graduates will have significant debt written off.

If you are in that 70% majority, making a voluntary overpayment of £5,000 today does not reduce your future monthly deductions by a single penny. All it accomplishes is reducing the write-off amount that the UK Government would have wiped clean for free. That £5,000 is effectively burned.

Frequently Asked Questions About Student Loan Overpayments

Frequently Asked Questions

Clear answers based on official HMRC rules and statutory guidance.

Unlike a commercial bank mortgage or personal loan, UK student loans function as an income-contingent graduate tax. You only repay 9% of earnings above a statutory threshold (e.g. £29,385 for Plan 2), and after 30 years (or 40 years for Plan 5), the remaining debt and interest are completely cancelled and written off by the UK Government. If you are projected to have any balance written off, making voluntary overpayments does not reduce your future monthly deductions; it merely gives away hard-earned cash to reduce debt that would have been wiped for free.

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Compare Common UK Salaries

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£25,000 / yr£1,793 / mo

£35,000 / yr£2,393 / mo

£50,000 / yr£3,293 / mo

£75,000 / yr£4,506 / mo

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Comprehensive guide to Plan 1, 2, 4, 5 and Postgraduate loan rules.

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UK Tax Brackets 2026/27

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Repayments are not the same as interest

Check the plan in your student finance account before comparing repayments. Pay-period thresholds and rounding can differ from annual threshold divided by twelve.

An undergraduate plan and a Postgraduate Loan may run together. A widget with one plan selector models one at a time; any combined comparison table is an annual illustration. Interest, cancellation dates and future earnings need separate assumptions.

Check the rules for your circumstances

Official guidance supports the rules described here; it does not approve or certify this calculator. Confirm dates, eligibility and unsupported cases before making a financial decision.