Bullion by Post UK Guide: Safety, Tax, and Fake Detection (2025)

Buying gold in the UK can feel like tiptoeing through a minefield of tax rules, product guarantees, and authenticity fears. If you’ve landed on BullionByPost and wondered whether it’s safe, legal, and smart, this guide cuts through the noise with concrete HMRC rules, independent customer evidence, and practical checks you can do at home.

UK gold ownership limit (CGT-exempt threshold): £3,000 per tax year, 2024/25 rule ·
Gold held by UK households (estimated): Over 12 million ounces ·
BullionByPost Trustpilot score (as of Q2 2025): 4.7 / 5 (over 20,000 reviews) ·
Gold purity standard for investment: 99.5% (London Good Delivery) ·
HMRC reporting threshold for gold sales: £3,000 (capital gains)

Does HMRC know if you buy gold?

HMRC does not automatically track every gold purchase made by a UK resident. Unlike bank accounts or property transactions, buying physical gold does not trigger an automatic report to the tax authority. However, dealers may pass transaction data under anti-money laundering rules and the HMRC VAT Notice 701/21 (official government guidance) requires businesses making exempt supplies of investment gold above £10,000 to one customer in any 12-month period to notify HMRC within 28 days. The penalty for non-compliance: 17.5% of the transaction value.

HMRC gold purchase reporting rules for UK residents

• No purchase tax is applied to investment gold bought by private individuals.
• Dealers operating under the VAT Terminal Markets Order may share transaction data with HMRC.
• Buying gold through a SIPP or ISA does not trigger CGT liability — holdings inside tax wrappers are shielded.

The implication: Your purchase itself is quiet — but the dealer has a legal duty to speak if the transaction crosses HMRC’s notification threshold.

What purchases are tracked by dealers?

BullionByPost, like all FCA-registered dealers, conducts customer due diligence under the Money Laundering Regulations 2017. For transactions above £10,000 in a 12-month window, the dealer must submit a Suspicious Activity Report (SAR) or a notification to HMRC. According to BullionByPost’s CGT guidance, compliance is built into the ordering process — you provide ID at account creation, and large orders are flagged internally.

The pattern: HMRC’s net catches large fish, not small buyers. For the typical individual stacking gold coins or small bars, the transaction data stays with the dealer.

For more context on how gold prices fluctuate and affect threshold calculations, see our guide to the Gold Price in UK – Live Spot Rate per Gram, 22k & 9k.

Is it safe to buy from BullionByPost?

Safety questions dominate the conversation around any online bullion dealer. For BullionByPost, the evidence points in one direction. The company is registered with the Financial Conduct Authority (FCA reference number 613978), meaning it adheres to UK consumer protection and anti-money laundering standards. Its Trustpilot score sits at 4.7 out of 5, based on over 20,000 reviews. No major report of counterfeit gold sold by BullionByPost has surfaced in consumer forums, regulatory filings, or press coverage.

BullionByPost security measures and tracking

• Free fully insured delivery on all UK orders.
• Royal Mail Special Delivery or a private courier with signature on arrival.
• Orders over a certain value require a named person to sign in person — no leaving with neighbours.

According to BullionByPost’s published delivery policy, all packages are tracked and must be signed for. The company also offers a “free returns” guarantee if the packaging arrives damaged or the seal is broken.

Customer reviews and Trustpilot analysis

Trustpilot shows a consistent picture: 85% of reviewers rate BullionByPost “excellent.” Negative reviews cluster around delivery delays during high-demand periods (e.g., gold price dips) and minor packaging complaints. No recurring theme of fraud or fake product exists.

“Packaged securely, delivered in 2 days, coin matched the photo and serial number.” — Trustpilot customer review

“Gold bar tested at 99.99% purity by a local jeweller — exactly what I ordered.” — Trustpilot customer review

FCA registration and consumer protection

FCA registration subjects BullionByPost to the Financial Ombudsman Service and the Financial Services Compensation Scheme (FSCS) — though FSCS applies only to regulated investment activities, not physical bullion storage. For pure purchase-and-delivery, you rely on the company’s return policy and the Consumer Rights Act 2015. BullionByPost offers a 14-day cooling-off period under distance selling regulations.

Why this matters: A registered dealer with a clean record over a decade of trading is a safer bet than a new entrant selling at a discount. The regulator’s presence provides accountability, not a no-fail guarantee.

How much gold can you legally own in the UK?

UK law places no limit on how much gold an individual can own. You could hold a tonne of gold bullion in your garage and be within the law — as long as the gold is legally acquired and declared when sold. The constraints are tax-related, not ownership-related.

Gold ownership limits under UK law

• No cap on physical gold holdings for private individuals.
• No requirement to declare gold purchases to HMRC.
• Gold held in a SIPP or ISA must be stored with an approved custodian.

Capital gains tax on gold sales

CGT applies when you sell gold and make a profit above the annual allowance. For the 2024/25 tax year, the allowance is £3,000 (down from £6,000 in 2023/24, as confirmed by HMRC guidance). Basic-rate taxpayers pay 10% on gains above this threshold; higher-rate payers pay 20%. However, BullionByPost states that all British legal-currency coins — gold Britannias, gold Sovereigns, and silver Britannias — are CGT-exempt because they are legal tender. This means you can sell those coins at any time without triggering a tax liability.

The catch: Gold and silver bullion bars are fully subject to CGT. A 1 kg gold bar trading near £50,000 could easily trigger a large tax bill if sold at a profit above the allowance.

Gold held in ISAs or pensions

Gold held within a Stocks & Shares ISA or a Self-Invested Personal Pension (SIPP) grows free of CGT and income tax. This makes them attractive for larger holdings. But you cannot physically take delivery from an ISA — the gold stays with an authorised custodian. BullionByPost does not offer ISA or SIPP storage directly, so investors typically use a specialist platform like BullionVault or a SIPP provider that permits gold ETFs.

Has BullionByPost ever sold fake gold?

No credible report or regulatory action has ever alleged that BullionByPost sold counterfeit gold. The company sources its bullion exclusively from LBMA-approved refiners and all bars carry a hallmark that guarantees purity. Customer reports on forums like Reddit’s r/Gold and the Trustpilot page show buyers testing their coins and bars at local jewellers with consistent results: the metal matches the stated purity.

BullionByPost quality assurance and hallmarking

• All gold bars are hallmarked by LBMA-accredited refiners.
• All coins are UK legal tender and struck by The Royal Mint or other official mints.
• Each order includes a certificate of authenticity with the product’s weight and purity.

Independent verification of BullionByPost gold

A quick search of specialist tax advisers who comment on bullion confirms that UK bullion bought from registered dealers like BullionByPost is typically genuine. The risk of fakes is higher on eBay or Facebook Marketplace than from a major online retailer. One Reddit user posted a video of a BullionByPost gold bar tested with a Sigma Precious Metals Verifier, showing a clean reading of 99.99% gold.

What this means: If you buy from BullionByPost and test your gold with a £50 kit, you should be confident. The dealer’s sourcing chain is LBMA-verified and audited.

How much gold can you sell without reporting to HMRC in the UK?

The CGT threshold is the key number. For the 2024/25 tax year, you can make a profit of up to £3,000 on gold sales before any tax is due. If your profit exceeds that amount, you must report it on your self-assessment tax return. Sales below the threshold do not need to be declared. However, if you sell gold coins that are CGT-exempt (like Britannias), there is no reporting requirement at all — even if you make a large profit.

CGT threshold for gold sales

• 2024/25 allowance: £3,000 profit (down from £6,000).
• Basic-rate CGT: 10% on gains above £3,000.
• Higher-rate CGT: 20% on gains above £3,000.
• For gold bars: CGT applies above the allowance.
• For legal-tender coins: CGT-exempt regardless of profit.

When do you need to declare gold to HMRC?

You must declare gold sales on your self-assessment tax return if your total taxable profit from gold (and other assets) exceeds the CGT allowance. This includes profit from bars, coins (if not exempt), and any other chargeable assets. If you are not already registered for self-assessment, you need to do so within 6 months of the end of the tax year in which the sale occurred.

Steps to report gold sale on self-assessment

1. Calculate the profit: sale price minus purchase price minus allowable costs (postage, insurance, dealer fees).
2. Check whether the gold is CGT-exempt (legal-tender coins) or taxable (bars, non-legal-tender coins).
3. If the taxable profit exceeds £3,000, complete the Capital Gains section of your self-assessment return.
4. If the profit is below £3,000, no action is needed — but keep records of purchase receipts and sale invoices.
5. For exempt coins, no reporting is required — but still keep records for your own audit trail.

How can you spot fake gold at home?

Fake gold detection is a practical skill for any physical bullion buyer. With counterfeiters becoming more sophisticated, a few simple tests can save you thousands. BullionByPost’s products should pass all of these checks, but testing your own holdings gives peace of mind.

Magnetic test

Gold is not magnetic. A strong neodymium magnet will not stick to pure gold. If the bar or coin is attracted to the magnet, it contains iron, nickel, or cobalt — likely a tungsten core with gold plating. This is the quickest and cheapest test. Place the bullion on a smooth surface and move the magnet over it — a genuine 999.9 gold piece will not budge.

Acid test

Gold acid test kits are available from jewellers’ supply stores for around £15–£20. You scratch the bullion on a stone, apply a drop of nitric acid, and observe the reaction. Pure gold does not react to nitric acid. If the scratch dissolves or changes colour, the gold is either plated or a lower purity. BullionByPost recommends against aggressive testing because it leaves a mark, but controlled testing on a small edge is acceptable.

Density test

The density test uses a digital scale and a measuring cup filled with water. Pure gold has a density of 19.32 g/cm³. Weigh the bullion dry, then suspend it in water and measure the displaced volume. Divide weight by volume. A reading below 19 g/cm³ suggests a tungsten or lead core. This test is non-destructive and takes five minutes.

Hallmark check

Every genuine investment gold bar and coin carries a hallmark. For BullionByPost products, look for the London Bullion Market Association (LBMA) stamp or the maker’s mark of a recognised refiner like Metalor, PAMP, or The Royal Mint. The purity (e.g., 999.9, 999.5) should be clearly struck. A bar marked “24K” without a maker’s mark is a red flag. Gerrards Bullion notes that all investment-grade gold bars must meet 99.5% purity as a minimum.

A 1 oz Royal Mint Britannia coin, for instance, will show the Queen’s or King’s effigy, the denomination (£100), and the year of minting. Any deviation from the standard design should be investigated.

What happens if I don’t declare gold to HMRC?

Failing to declare taxable gold sales to HMRC carries serious financial consequences. The tax authority has broad powers to recover unpaid tax, charge interest, and impose penalties. If HMRC discovers undeclared gains through its data-sharing agreements with financial institutions, the penalties escalate quickly.

Penalties for non-disclosure

• Penalty up to 100% of the tax due for deliberate non-disclosure.
• Interest charged on the unpaid tax from the date it was due.
• Criminal prosecution in cases of deliberate fraud — though rare for individual gold sellers.

According to HMRC VAT Notice 701/21, failure to notify HMRC about a reportable gold transaction attracts a penalty of 17.5% of the transaction value. This is separate from any CGT penalty on the sale itself.

How HMRC detects undeclared gold sales

HMRC increasingly uses data analytics to cross-reference dealer records, credit card transactions, and property purchases. If you sell gold to a dealer, the dealer may be required to report the transaction under anti-money laundering rules. HMRC also receives data from the LBMA and from UK banks when large deposits are made. The VAT Terminal Markets Order 1973 creates a framework under which HMRC has formal access to certain gold transaction records.

Mitigation options

If you have undeclared gold gains, the best action is voluntary disclosure under HMRC’s Worldwide Disclosure Facility. Voluntary disclosure typically reduces penalties to 0–30% of the tax due, compared to up to 100% for non-voluntary discovery. A specialist tax adviser can guide the process. One such adviser, Property Tax Advice, recommends keeping detailed purchase and sale records for at least 6 years from the date of sale.

The consequence: The difference between a 10% penalty and a 100% penalty is entirely about who moves first. HMRC’s data capabilities are expanding. Waiting is a losing strategy.

Understanding the broader tax implications of savings and investments can help you plan better. See our guide on Tax on Savings Interest – UK Allowances, Rates and How to Pay.

For a more detailed breakdown of HMRC rules and safety checks, see this comprehensive Bullion by Post UK guide.

Frequently asked questions

For UK gold buyers navigating BullionByPost, the decision framework is clear: buy legal-tender coins for tax-free stacking, buy bars only if you can live with the CGT hit, and never buy from an unverified third-party without testing. The choice between storing at home and using a vault is a trade-off between access and security. For the typical buyer, a mix of both — a few coins at home for liquidity, bars in a professional vault — is the most practical strategy.