Are Gilts Tax-Free? How UK Government Bonds Are Taxed (2026)

Here is the sentence that surprises most UK investors: a gilt can hand you a profit that is completely free of Capital Gains Tax, while the interest it pays you is taxed like any other savings income. So when someone asks whether gilts are tax-free, the honest answer is "half of them is." Understanding which half changes how you buy UK government bonds.

This guide breaks down exactly how gilts are taxed in 2026 - the capital gain, the coupon, and the wrapper - and shows you the low-coupon strategy that deliberately shifts most of your return into the tax-free column. If you want the market skills to sit alongside the tax knowledge, our structured US, UK and Europe investing courses are built for exactly this audience.

Are gilts tax-free? The short answer

Partly. Any capital gain you make on a gilt is exempt from Capital Gains Tax, but the coupon it pays is taxable as savings income at your marginal Income Tax rate. So a gilt is CGT-free, never income-tax-free, unless you hold it inside a tax wrapper.

That split is the whole game. It means two gilts paying the same overall yield can leave you with very different amounts after tax, depending on how much of that yield arrives as a price gain versus as a coupon. Get the split right and a gilt can comfortably out-earn a savings account paying the same headline rate.

The three tax buckets are simple once you separate them:

• The capital gain - the difference between your buy price and the sale or redemption price. CGT-exempt.
• The coupon - the fixed interest the gilt pays. Taxable as savings income.
• The wrapper - hold the gilt in an ISA or SIPP and even the coupon becomes tax-free.

Why gilts are exempt from Capital Gains Tax

Gilt-edged securities are named in Section 115 of the Taxation of Chargeable Gains Act 1992 as exempt from CGT. HMRC lists gilts as qualifying gilt-edged securities, so any gain on disposal - whether you sell in the market or hold to redemption at par - falls outside the CGT net entirely.

This matters more in 2026 than it has in a long time. With shares, you report gains above the annual exempt amount and pay CGT on the excess. With gilts, there is nothing to report and nothing to pay on the gain, no matter how large. That is a genuine structural advantage, and it is the same reason a share investor has to think carefully about how capital gains on shares are reported to HMRC while a gilt investor simply does not.

The exemption also covers redemption, not just a sale. If you buy a gilt below its £100 par value and hold it until the government repays you at par, that uplift is a capital gain - and it is CGT-free in exactly the same way as a gain booked by selling early in the market. There is no minimum holding period and no annual cap: the exemption applies whether the gain is £100 or £100,000.

Source: GOV.UK, gilt-edged securities exempt from CGT, 2026; interactive investor, tax rules for bonds and gilts, 2026; House of Commons Library, Direct taxes rates and allowances 2026/27.

Read the table top to bottom and the strategy writes itself: the more of your total return you can earn as a gain rather than a coupon, the less tax you pay. That single idea drives everything below.

Is the gilt coupon taxable?

Yes. The coupon is taxed as savings income at your marginal rate - 20% for basic-rate, 40% for higher-rate, 45% for additional-rate taxpayers. It is not dividend income and does not use the dividend allowance; it sits in the same box as bank interest, which is why how dividend income is taxed follows completely different rules.

Before any tax bites, though, two allowances can absorb the coupon entirely.

How the savings allowances can wipe out the tax

The Personal Savings Allowance shields the first £1,000 of savings interest for basic-rate taxpayers, £500 for higher-rate taxpayers, and nothing for additional-rate taxpayers, for 2026/27. Gilt coupons count against it just like bank interest.

On top of that sits the starting rate for savings: a 0% band of up to £5,000, available where your non-savings income is below £17,570 and reduced pound-for-pound by non-savings income above your personal allowance. It is aimed at people living mainly off savings and investments.

Stack the lot and a person with no other income can receive up to £18,570 of interest a year with no tax at all: the £12,570 personal allowance, plus the £5,000 starting rate for savings, plus the £1,000 PSA. For many smaller portfolios, that means the "taxable" coupon is not taxed in practice at all.

The practical takeaway is that the same gilt produces completely different outcomes depending on who holds it. A retiree or a lower earner drawing income from gilts may pay nothing on the coupon, while a top-rate earner pays 45% on every pound of it. That gap is precisely why the strategy in the next section matters more the higher your tax band sits.

The low-coupon gilt strategy: turning return into a tax-free gain

This is where the CGT exemption stops being trivia and starts being money. Because the gain is tax-free and the coupon is not, a gilt that delivers most of its return as a price gain is more tax-efficient than one paying a fat coupon - even at the same yield to maturity.

Take a worked example. A gilt with a 0.5% coupon maturing in 2028, bought at around 90p in the pound, might offer a yield to maturity of roughly 4%. That 4% splits into two very different parts for tax.

Source: salarytax.uk, UK gilts direct vs gilt ETFs 2026/27. Illustrative gilt for education, not a recommendation.

Only the 0.5% coupon is taxable. The 3.5% that comes from the price climbing back toward par at redemption is a capital gain - and therefore CGT-free. An additional-rate taxpayer keeps almost all of the return.

Now compare that with a savings account. A 4% savings account pays its entire return as taxable interest. After 45% tax, 4% becomes 2.2%. The low-coupon gilt, taxed on only its tiny coupon, lands near 3.78%.

What to do with this: if you are a higher- or additional-rate taxpayer with taxable cash, compare gilts on their after-tax yield, not the headline coupon. A low-coupon gilt trading below par is often the more efficient home for money that would otherwise sit in a taxed savings account. Basic-rate taxpayers and anyone using a wrapper see a smaller edge, because their coupon is lightly taxed or not taxed at all.

Do gilt funds and ETFs get the same tax break?

No - and this is the costliest misunderstanding in the whole topic. Gilt ETFs and gilt funds do not inherit the Section 115 CGT exemption. They are UCITS funds, not direct gilt-edged securities, so any capital gain you make on the fund is subject to CGT in the normal way outside an ISA.

The difference is not academic. Buy a single gilt directly and your price gain is CGT-free. Buy a fund that holds the very same gilts and your gain on the fund units can be taxed. Two routes to the same underlying asset, two different tax outcomes.

It also makes no difference whether the fund pays its interest out or rolls it up. An accumulation gilt fund still generates income each year that HMRC treats as received and taxable, and its capital gains still fall under CGT. You get neither half of the direct-gilt tax break automatically.

That does not make gilt funds useless. They offer diversification across maturities, automatic reinvestment, and no need to manage individual redemptions or reinvest maturing cash yourself. But if the CGT exemption is central to your plan, only directly held gilts deliver it. Inside an ISA or SIPP the distinction disappears, because the wrapper shelters the gain either way - which is often the simplest way for a fund investor to sidestep the whole problem.

Gilts in an ISA or SIPP, and the mistakes to avoid

Holding gilts inside a wrapper is belt-and-braces. The gain was already CGT-free, but the wrapper also removes tax on the coupon - useful for additional-rate taxpayers with no Personal Savings Allowance, or anyone whose coupon income exceeds their allowances. If you are weighing where to put a gilt, it is worth knowing the 2026/27 ISA rules before you commit the allowance.

The recurring errors are easy to name and easy to avoid:

• Assuming a gilt fund is tax-free. The CGT exemption belongs to direct gilts, not to funds or ETFs that hold them.
• Forgetting the coupon is still taxable. "Gilts are CGT-free" gets misheard as "gilts are tax-free." The interest is savings income and can push you over your PSA.
• Chasing a high coupon in a taxable account. For higher- and additional-rate taxpayers, a high-coupon gilt is tax-inefficient; a low-coupon gilt below par usually wins after tax.
• Wasting a wrapper on a low earner. If your allowances already cover the coupon, an ISA space might do more work holding something that would otherwise be taxed harder.

Match the gilt to your tax position, not to the biggest headline yield, and the return you keep improves without taking on a scrap more risk.

Frequently asked questions

This article is educational content, not investment or tax advice. Tax treatment depends on your individual circumstances and can change; investing carries risk, including the risk of loss.