Sovereigns and Britannias are the two most widely held UK gold bullion coins, and both carry the same core tax advantage — CGT and VAT exemption for UK residents. The real choice between them comes down to purity, size and cost per unit, not tax.

Gold Sovereign

  • 22 carat (91.6% pure) gold
  • Approx. 0.2354 troy oz gold content
  • Lower unit cost, more accessible entry point
  • Struck since 1817 (with production breaks)

Gold Britannia

  • 24 carat (999.9 fine) gold
  • 1 troy oz standard (fractional sizes available)
  • Higher unit cost, higher purity
  • Struck since 1987

What's actually the same

  • Both are legal tender in the UK, which is why both are exempt from Capital Gains Tax on disposal for UK residents.
  • Both qualify for VAT exemption as investment-grade gold under HMRC's rules.
  • Both are struck by the Royal Mint and widely recognised and traded by UK bullion dealers.
  • Neither pays any income; the return on either depends entirely on the gold price and the spread you pay/receive when buying and selling.

What's actually different

Purity

A Britannia's 24ct (999.9 fine) gold is purer than a Sovereign's 22ct (91.6% fine) gold. In practice this mainly affects how the coin's total weight translates into pure gold content, and some investors have a straightforward preference for higher purity.

Size and cost

A full Sovereign contains roughly a quarter of a troy ounce of gold, while a standard Britannia contains a full troy ounce — meaning a single Britannia costs roughly four times as much as a single Sovereign at current gold prices. Fractional Britannias (1/4oz, 1/10oz etc.) narrow this gap but usually carry a higher percentage premium.

Premium over spot

Premiums vary by dealer and market conditions rather than being fixed by coin type, but smaller/fractional coins of either type generally carry a higher percentage premium than full-size coins, since minting and distribution costs are spread over less metal.

Which suits which investor

Neither is objectively "better" — the choice is about unit size and entry cost rather than quality. Someone wanting to build a gold position gradually in smaller increments may prefer Sovereigns or fractional Britannias; someone buying a larger position at once may find full-ounce Britannias more cost-efficient per ounce of gold held. Liquidity is broadly comparable for both when sold through an established UK bullion dealer.

Before choosing

  • Compare the actual premium over spot for both, from the same dealer, on the same day.
  • Decide your target total gold exposure first, then work out which coin size gets you there most cost-efficiently.
  • Confirm the dealer's buy-back terms for whichever coin you choose — the spread matters as much as the purchase premium.

See also Are Gold Sovereigns a Good Investment?, Are Gold Britannia Coins a Good Investment?, and Best Gold Coins to Buy for Investment in the UK for the fuller picture on each.

Gold prices can fall as well as rise. This is not financial advice; verify current tax rules on gov.uk before relying on them.