Savings Taxed at 40%? Why Smart Investors Buy 'Low-Coupon Gilts' (Tax-Free Gains)

📉 The Savings Tax Trap

You have £50,000 in a savings account earning 5%. Great? Not exactly. If you are a Higher Rate taxpayer, your Personal Savings Allowance (PSA) is only £500. Everything earned above that is taxed at 40%. Your headline "5% return" is effectively reduced to just 3% after tax. With inflation lingering, this means your purchasing power is barely moving. You need an asset that HMRC cannot touch.

Savings Taxed at 40%?

Most people assume the only tax-free shelter is an ISA. However, the annual ISA allowance is capped at £20,000.

What if I told you there is an investment backed by the UK Government that offers unlimited tax-free capital gains? Welcome to the world of Gilts (UK Government Bonds).

"Gilt-Edged Securities"

Here is the loophole: While interest from Gilts is taxable, profits made from selling or redeeming UK Government Gilts are exempt from Capital Gains Tax (CGT).

🇬🇧 How It Works:

Interest (Coupons): Taxed as Income (Inefficient).
Capital Gain (Profit): Tax-Free (Efficient).

The Strategy: Buy "Low Coupon" Gilts. These are bonds issued when interest rates were near zero (e.g., 0.125%). They now trade at a significant discount to their face value. You make the bulk of your return when the bond matures at £100 (Par Value), and that profit is 100% yours.

The "TN28" Gilt

Let's look at a real-world scenario relevant for 2026 portfolios (using the Treasury 0.125% 2028 as an example):

Investment (£50k) Return Before Tax Return After 40% Tax
Fixed Rate Saver (5%) £2,500 £1,700*
Low Coupon Gilt (TN28) £2,400 (Capital Gain) £2,400 (Tax Free)

*Assumes £500 PSA is applied. Without PSA, return is just £1,500.

You invest in the Gilt trading at a discount (e.g., £95). It pays negligible interest (minimising income tax). At maturity in 2028, the government pays you £100. That £5 uplift per unit is tax-free profit.

Chief Editor's Verdict

If you are a Higher or Additional Rate taxpayer, holding large cash sums in a standard savings account is essentially a voluntary donation to the Treasury.

Look for Gilts with low coupons (e.g., 0.125% maturing in 2028) that trade below par. It is arguably the safest, most tax-efficient vehicle to park cash outside of an ISA limit.

⚖️ Legal Disclaimer:
The information provided in this article is for educational purposes only and does not constitute financial or investment advice. Bond prices can rise and fall, and capital is at risk if you sell before maturity. Tax treatment depends on your individual circumstances (e.g., tax residency, total income) and may be subject to change by future governments. Always research thoroughly or consult a qualified independent financial adviser before making investment decisions.

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