How T40's clean price, gross redemption yield and after-tax net yield have moved over time. A premium feature — sign in and subscribe to view the full history.
| Your income tax band | Net yield | Savings equiv* |
|---|---|---|
| No tax | 5.620% | — |
| Basic 20% | 4.709% | 5.89% |
| Higher 40% | 3.783% | 6.30% |
| Additional 45% | 3.552% | 6.46% |
*Savings Rate Equivalent = the gross yield a fully-taxable savings account or bond would need to match this gilt's net yield, at that tax rate. Gilt coupons are taxed as income; the capital gain to par is exempt from CGT. Figures don't include your Personal Savings Allowance, so they're conservative. How we calculate this.
T40 is the UK Treasury gilt "4 1/4% Treasury Gilt 2040", paying a 4.25% annual coupon and redeeming at par (£100) on 7 December 2040 — about 14.2 years away. At its 11 Sep 2026 closing price of £86.69 the gross redemption yield is 5.620%. Trading below par, part of its return is a CGT-exempt capital gain to maturity (£1,331 per £10,000 nominal), so its net yield holds up better after tax than its coupon alone would suggest — a 45% taxpayer keeps 3.55% net. That is how gilts are taxed in practice: gilt coupons are taxed as income, while the capital gain is free of capital gains tax on any disposal — at redemption or an earlier sale — though interest accrued since the last coupon is taxed as income when you sell.
Prices are indicative closing levels for 11 Sep 2026 and may be delayed — see the live gilt table for current figures at your tax rate. Information only, not financial advice.
Information only — not financial advice. Gilt prices are indicative from last available close (11 Sep 2026) and may be delayed. Verify before transacting. UK tax treatment may change.