Calculate Interest Savings and Time to Debt-Freedom (2026/27)
Deciding whether to make voluntary overpayments on your UK student loan is a complex financial decision. Unlike a standard bank loan, student loan repayments are linked to your income, and any remaining balance is typically written off after 30 or 40 years.
In the 2026/27 tax year, with interest rates on many plans still hovering around 7–8%, the “cost of waiting” has never been higher for high earners. However, for those unlikely to ever clear the full balance before it is cancelled, making extra payments could be “dead money.” Our Student Loan Early Repayment Planner helps you visualize the impact of extra monthly contributions on your total interest and your “date of freedom.”
Why Use This Planner?
Visual Projections: See a side-by-side comparison of your total lifetime cost with and without voluntary contributions.
Plan-Specific Logic: Supports Plan 1, Plan 2, Plan 4 (Scotland), Plan 5, and Postgraduate loans.
Interest Modeling: Accounts for the current RPI-linked interest rates that make student debt grow faster than many other forms of credit.
The “Write-Off” Factor: Helps you determine if overpayments actually save you money or if the loan would have been written off anyway.
Student Loan Repayment Planner tool
Strategise your debt-freedom. Model how voluntary overpayments impact your lifetime interest costs and repayment timeline for the 2026/27 tax year.
Your Repayment Projection
The Student Loan Dilemma: To Overpay or Not to Overpay?
Deciding whether to clear your student loan early is one of the most debated topics in UK personal finance. Unlike a commercial bank loan or a mortgage, a student loan behaves more like a “Graduate Tax.” If you don’t earn, you don’t pay—and eventually, the debt simply disappears.
However, for many, the high interest rates applied to these loans (especially Plan 2 and Postgraduate loans) mean the balance grows faster than they can pay it off through mandatory salary deductions.
The 2026 Strategy: Three Factors to Consider
1. The Interest Rate Gap
In 2026, many student loan interest rates remain significantly higher than the rates available on standard savings accounts. If your loan is accruing interest at 7.5% but your ISA is only earning 4.5%, you are effectively “losing” 3% on that money every year. In this scenario, overpaying is mathematically the winning move—provided you will eventually clear the loan.
2. The “Write-Off” Horizon
This is the “Golden Rule” of student loans. Most UK student loans are cancelled after 30 years (or 40 years for the new Plan 5).
- If you are a lower or middle earner: You may never pay back the full balance before it is written off. In this case, every penny you overpay is “dead money” that could have been spent or saved elsewhere.
- If you are a high earner: You are almost certain to pay back the full amount. For you, the loan is a real debt, and every month you leave it active, you are paying interest. Overpaying early can save you tens of thousands of pounds in the long run.
3. Opportunity Cost and Liquidity
Once you pay money into the Student Loans Company (SLC), you cannot get it back. If you might need that cash for a mortgage deposit, an emergency fund, or a wedding in the next five years, it is usually better to keep the money in a flexible ISA, even if the interest rate is slightly lower than the loan’s rate.
Summary: Who should overpay?
- High Earners: Yes. If your salary is high enough that you’ll clear the debt in 10–15 years, overpaying saves massive interest.
- Low/Mid Earners: No. It is likely better to let the 30/40-year clock run out and keep your cash for your own goals.
- New Graduates (Plan 5): Use the calculator carefully. With a 40-year window, almost everyone will be paying this back for most of their career—making early overpayment more attractive than it was for previous generations.
