Exclusive: Which? Explains the Mortgage Overpayment vs Savings Dilemma
Which? has conducted an exclusive analysis to determine whether overpaying your mortgage, saving, or investing is the most effective use of spare cash. The consumer champion crunched the numbers to compare these financial strategies, offering insights that could save homeowners thousands of pounds.
The Core Financial Comparison
Which? explains that if your mortgage interest rate is higher than your savings rate, overpaying your mortgage typically yields better returns. For instance, with a savings account matching your mortgage rate, returns would be identical. However, mortgage rates often exceed savings rates, making overpayments advantageous.
Investing presents another option, but it carries inherent risks. Analysis by investment platform IG indicates that since 1999, UK stock market investors have achieved around seven times the real return of cash savers after inflation. Yet, Which? cautions that poor performance could lead to losses, as returns are not guaranteed.
Case Study: A £200,000 Mortgage Scenario
Which? uses the example of a £200,000 mortgage with 30 years remaining and a 5% interest rate. Without overpayments, the total repayment would be £386,512, including £186,512 in interest.
- Overpaying by £50 monthly cuts the term by two years and ten months, saving £20,924 in interest.
- Overpaying by £250 monthly reduces the term by ten years and one month, saving £70,796 in interest.
For comparison, saving £250 monthly at a 4% rate would take 20 years and nine months to accumulate enough to clear the mortgage, reducing the term by nine years and three months and saving £24,315 in interest.
Investing £250 monthly with a 7% return could build a pot of £113,686 in 18 years and six months, including £58,186 in growth. Using this to clear the mortgage would cut the term by 11 years and six months and save £36,128 in interest, though this strategy involves risk.
Key Questions to Consider First
- Do you have an emergency fund? Aim for at least three months' worth of essential outgoings saved in cash.
- Do you have other debt to pay off first? Prioritise clearing or controlling other debts.
- Will you be charged to overpay? Most fixed-rate mortgages allow overpayments up to 10% of the balance annually without fees, but check your terms.
- Could overpayments improve your loan-to-value? Reducing your mortgage size may secure better remortgage deals.
- Will you pay tax on savings or investments? Be aware of tax on savings interest, capital gains, and dividends.
- Is an offset mortgage worth considering? These subtract savings from the mortgage balance but often have higher interest rates.
Which? notes that mortgage and savings rates fluctuate over time, and decisions should be based on current circumstances. They advise that a mixed strategy, tailored to individual financial situations, may be optimal. Remember, this information is for informational purposes only and not financial advice.
