How to Buy UK Gilts: Check the Price, Fees and Tax Before You Deal

The Bank of England's yield curves are modelled market curves, not a platform's executable ask price for an individual gilt. The latest observation returned by FRED's UK long-term government bond series was 4.9886% for August 2026 (retrieved 7 October 2026). July was 4.9318% and June 4.7960%. These monthly observations establish context; none is a quote for a two-year bond, nor a rate guaranteed to a new buyer.

The NS&I Guaranteed Growth Bond offered 5.07% gross/AER for two years, Issue 81 when checked on 7 October 2026. That is an actual fixed-term cash comparison, not the Bank Rate. Its interest compounds annually and is taxable in the year the bond matures; early withdrawal is not permitted. For a buyer targeting two years, check a gilt maturing at roughly the same time, then compare after tax and transaction costs. NS&I can change or withdraw an issue without notice. Our gilts hub shows the broader yield backdrop; the UK borrowing-costs story explains why the market curve moves.

Take £10,000 today, a two-year horizon, and a higher-rate taxpayer with their Personal Savings Allowance already used. For the illustration only, suppose a conventional gilt pays 0.125% annual coupon on nominal, two years remain, the next coupon accrual is zero at settlement, coupons pay twice yearly, the executable clean ask is £90.60 per £100 nominal, and online dealing costs £6.95 to buy. These are modelling inputs, not an observed market quote or a recommendation for a named security. An actual trade needs a dated ask, ISIN, coupon schedule and settlement date; a long-term index yield cannot substitute for them. The £6.95 is the maximum online share-dealing charge shown on HL's tariff; confirm that the charge and account fees for your gilt and wrapper on the order preview. Assume no additional account charge for this example, no coupon reinvestment and no change to tax rules.

For £11,000 nominal in £100 increments: clean cost = 110 × £90.60 = £9,966; add the £6.95 dealing charge, leaving £27.05 uninvested. At zero accrued interest, dirty cost equals clean cost. At redemption, the government repays £11,000 nominal. Two years of coupons total £27.50. On the assumed 40% marginal tax rate and exhausted allowances, coupon tax is £11.00 (subject to tax-year timing), leaving £16.50. Closing cash including the idle £27.05 is £11,043.55; gain £1,043.55. The £1,034 discount from par is a capital gain exempt from CGT on conventional gilts under section 115 TCGA 1992, not exempt coupon income. This simplified calculation assumes accrued-income rules do not alter tax allocation.

Put the same £10,000 into the cited two-year NS&I issue, starting on the same day: £10,000 × 1.0507² = £11,039.70 gross at maturity. With the same 40% marginal rate and no savings allowance remaining, after-tax interest is £623.82, for £10,623.82 total. The example gilt wins by £419.73 if the illustrated ask is available. Not a free £419: move the clean ask higher and the advantage disappears. With £11,000 nominal held constant, each £1 extra per £100 nominal cuts the gain by £110. At an ask of about £94.42, the net returns converge (including the idle cash); above that, this cash issue wins on these assumptions. This threshold is illustrative, not a live order price.

NS&I's interest is received at maturity whereas gilt coupons arrive earlier and sit idle here: different cash-flow timing, explicitly valued at zero reinvestment. Reinvesting coupons would change the gilt result. A cash ISA could change the tax comparison entirely. If your savings allowance is unused, recalculate rather than applying the 40% tax shortcut. See the savings hub for alternatives.

A platform normally displays a clean price per £100 nominal. Settlement normally requires the dirty price: clean price plus interest accrued since the last coupon date. You pay the seller for the coupon they have earned so far, then receive the entire next coupon yourself. The zero-accrual assumption above deliberately isolates the price and tax arithmetic; on a real trade it is rarely exactly zero. Request the accrued-interest amount and cash settlement total from the order preview before submitting. The UK accrued income scheme can affect taxation on purchase or sale between coupon dates; HMRC's guidance is a starting point if the amount is significant.

For an explanation of nominal value versus price, see the UK government gilts explainer. Coupon = annual interest on nominal; yield to maturity = annualised return from the actual purchase price and future payments, assuming the issuer pays as promised and you hold to redemption. Neither a high coupon nor a discount to £100 is a standalone bargain. For a goal due before redemption, you must sell, and the sale price can be lower than your purchase price even if every coupon is paid. A longer bond can fall sharply when yields rise. Match the redemption date to the spending date rather than reaching for a higher long-term curve yield.

For most readers, the practical route is to search for a conventional gilt on a platform, verify the ISIN and redemption date, choose the account, inspect the bid/ask spread, accrued interest, commission and any custody charge, and place a limit order where offered. Do not infer the fee for gilts from a provider's generic shares tariff: confirm it on the dealing screen. HL's current charges show online share dealing up to £6.95, but account charges depend on the wrapper. Interactive Investor's Core tariff lists £5.99/month for portfolios up to £100,000 plus £3.99 for UK shares; a recurring fee matters far more than a small yield difference on one short holding, and gilt eligibility/charges require checking separately. If you already pay for a platform, count only incremental fees; if opening solely for one gilt, count the whole subscription. Read the platform comparisons before deciding.

The DMO Purchase and Sale Service is a secondary-market execution-only service for eligible UK-resident retail investors, administered by Computershare. You must join the Approved Group of Investors and submit the purchase form and payment together. You cannot specify a maximum purchase price or minimum sale price. It is not a route into gilt auctions and it is not a Stocks and Shares ISA. Obtain its current commission schedule and minimum order from the DMO/Computershare before using it; neither was verified for this comparison. Do not assume it is free or that it offers a better execution price. A platform ISA shelters both eligible gilt coupons and gains; in a taxable account, gains on conventional gilts are generally exempt but coupons remain taxable.

First, an already available ISA may erase the gilt-versus-cash tax difference: if cash interest is sheltered, compare gross outcomes on the same term after investment fees. Second, HMRC's savings-interest guidance explains that your other interest and allowances determine whether you pay tax at all. The example assumes a full 40% marginal rate on all interest; it is not the outcome for every higher-rate taxpayer. Tax treatment depends on residence and circumstances and can change.

Third, the NS&I product locks money until maturity; a gilt normally has a resale route but no guaranteed early-sale value. If there is any realistic chance you need the cash before redemption, compare access rather than calling the gilt 'safer'. Gilt holdings are claims on the UK government, not FSCS-protected bank deposits; you still face market-price and inflation risk. Fourth, a real executable ask, spread and accrued interest replace the neat hypothetical £90.60. The sensible trade is the one that survives your own updated break-even calculation, not the one whose screen coupon looks appealing.