Shanghai gold vs London gold: how far apart the prices are, and how the premium is calculated

Compare two numbers first. At 2026-10-21 16:02 (Beijing) the London gold mid price was 4,123.69 USD/oz, which at a USD/CNY rate of 6.6913 and 31.1035 grams to the ounce is 887.13 CNY per gram. The "today's gold price" you see at home is usually quoted somewhere between 890 and 930 CNY per gram.

That gap is the premium. It is not someone quoting randomly and it is not a jeweller ripping you off — it is a structural spread built out of four things: tax, quotas, delivery location and domestic demand. Understand those four and you can judge for yourself whether the current price is a buy or a wait.

This article does one thing: it separates the two quoting systems, "Shanghai gold" and "London gold", gives you a formula you can run yourself, then explains where the premium comes from, what range is normal, and why the arbitrage that looks obvious cannot actually be done.

1. What the two "gold prices" actually are

In Chinese usage "gold price" refers to at least four different things. They all price the same metal, but contract, unit, delivery method, participants and tax treatment all differ, so naturally the prices do too. Separate them first, then argue about whether it is expensive.

The Shanghai Gold Benchmark Price is produced by the Shanghai Gold Exchange's centralised pricing session and is the official RMB benchmark for domestic gold; London gold is an OTC quote with no single "official" price, and different liquidity providers quote slightly differently.

The key difference is how the price is formed. London gold is quoted continuously, changing several times a second, and every price you see is one a market maker will deal at; the Shanghai benchmark is a fix, set at only two points in the day from members' concentrated bids, and RMB gold prices revolve around it all day.

That has a very practical consequence: the Shanghai benchmark always lags the international price. If international gold jumps 1% at three in the morning Beijing time, Shanghai gold will not reflect it until the 10:15 fix. So when you see "domestic price unmoved, international price surging" in the morning, that is not an arbitrage, it is a time lag.

2. One formula to join the two: units, FX and purity

The conversion needs only three constants: 1 troy ounce = 31.1035 g; 1 kg = 1,000 g; purity taken as 99.99% throughout (London standard delivery is 995+, Shanghai is 9999, a negligible difference). The formula:

Spread that result across the units people actually use, so you can check it against a shop's price list:

The conversion itself is not hard; what is hard is not comparing across purities and units. Three common traps:

• A Hong Kong tael is not a market tael. A Hong Kong gold shop's "one tael" is the 37.429 g tael, against the mainland market tael of 37.5 g — 0.071 g apart, nearly 2 g over a kilogram, close to 1,700 CNY at 887 per gram.
• 18K is not 99%. 18K is 75% gold, yet it is often priced "per piece", and converted to a per-gram pure gold price it is frequently 40%+ more expensive than 24K. For investment purposes only accept 999.9.
• Which FX rate. A bank's cash selling rate runs 0.3%–0.8% above the mid rate, so converting at the cash rate overstates the cost. Use the mid rate consistently and the error stays controllable.

To work directly with your own numbers, use the gram/ounce converter, or use the gold P&L calculator to turn the bid-ask into actual profit and loss.

3. Where the premium comes from: five sources

Premium = Shanghai benchmark ÷ parity − 1. Parity is the number that formula above produces. With a parity of 887.13 CNY/g, if Shanghai gold quotes 905 the premium is 2.0%. That 2% is not invented — it is five layers of cost stacked up.

1. VAT: the biggest piece, 13%

This is the first reason a premium exists, and the most overlooked. Gold imported through ordinary trade attracts 13% VAT; standard gold bought through a Shanghai Gold Exchange member is VAT-exempt when no physical delivery occurs, and where delivery out of the vault does occur the tax is levied and refunded immediately. In other words: gold circulating inside the exchange system carries a light tax burden, and the moment it leaves the vault as a bar in your hand, the tax comes back.

Hence a counter-intuitive pattern: prices inside the exchange sit close to international parity, while shop-counter prices are much higher. A large part of that gap is tax and channel cost, not extra profit for the shop.

2. Import quotas and approvals

Gold cannot be imported in unlimited quantity. Domestic commercial banks need an import quota, set by the competent authority. When domestic demand suddenly swells — ahead of Spring Festival, say, or during a buying rush triggered by a price surge — the quota runs short, domestic supply tightens and the premium is pushed up immediately. Conversely in a slack season with loose quotas, the premium compresses below 0.5%.

3. Inelastic domestic demand

Chinese gold demand has two very hard floors: wedding jewellery and residents substituting gold for savings. The first is highly seasonal (National Day, and the two months before Spring Festival); the second is directly tied to sentiment about property, equities and deposit rates. Neither is price-sensitive — a family buying wedding gold does not walk away because the premium is 3%. Inelastic demand gives sellers pricing power.

4. FX expectations and capital controls

When expectations of yuan depreciation strengthen, domestic gold buying rises markedly, because gold is treated as a substitute for buying foreign currency. The premium then typically widens in the same direction as FX expectations. This point matters: much of the premium's movement reflects expectations about the exchange rate, not views about gold itself. On that relationship, see how to hold gold when the yuan depreciates.

5. Transport, insurance, assay and refining

From a London vault to a Shanghai delivery vault, every step costs money: secured transport 0.1%–0.3%, insurance 0.05%–0.1%, assay and remelting 0.1%–0.3%, storage 0.05%. Together 0.3%–0.8%. This is the normal cost of global gold logistics and no market escapes it.

4. What premium is normal, and what should worry you

Converting the premium into yuan is more intuitive than looking at percentages. Taking the snapshot parity of 887.13 CNY/g as the base:

Values in the table are arithmetic conversions to show orders of magnitude; they do not represent the actual quotes of any particular trading day.

The test can be simpler still: look at the premium together with how long you intend to hold. Someone holding three years and expecting 6% a year loses half a year of return to a 3% premium and can live with it; someone running a three-month swing has effectively had half their stop-out eaten before they start, and it is not worth it.

One more practical comparison: premium versus spread. Spot gold's spread today is 0.66 USD/oz, or 0.016%, so a round trip is 0.03%. A 3% premium on a physical bar is 100 times the cost of trading spot. That is why "spot for short-term, physical for long-term" is not a matter of style preference but of cost.

5. Why the arbitrage does not work: five frictions

Seeing 887 against 913, many people's first thought is: buy in London, sell in Shanghai, make 26 CNY per gram, 26,000 on a kilogram. That works on paper and fails in reality. Here is the item-by-item arithmetic.

As long as item 2 exists, the arbitrage is mathematically negative expectancy: a 3% spread against 13% tax. The people who can actually capture that spread are institutions with an import quota, able to use the immediate VAT refund inside the exchange system; their cost structure is nothing like a retail investor's.

6. How overseas Chinese can use this spread to decide

For people living abroad year-round, the use of this spread is not arbitrage but deciding where to buy. The same 100 g bar can land at costs more than 10% apart in different markets.

Tax treatment is a summary of common rules; local tax law in force and the merchant's terms prevail. Premiums are typical industry ranges for investment bars; jewellery is usually far higher because of fabrication and brand premium.

Three practical conclusions:

1. Permanently settled abroad → buy locally, sell locally. The declaration cost, insurance cost and re-assay cost of carrying gold across borders together usually exceed a 3% spread. And when you sell, local dealers only recognise product from their own system, so foreign bars are discounted harder.
2. Short trips home, modest amounts → buying domestically is simpler. Buyback channels are mature, purity is well recognised and there is no FX loss. Provided the premium is within 3%.
3. Want leverage to trade the gold price → buy physical metal in neither place. Spot gold XAUUSD has a spread of 0.016%, one hundredth of the round-trip cost of physical. Physical is insurance, leverage is a tool; do not mix them.

7. Three steps to judge whether a local quote is expensive

No need to memorise formulas. Three steps. Using the 2026-10-21 snapshot, with parity at 887.13 CNY/g.

Step one: work out today's parity

Open the live gold price page for the XAUUSD mid, multiply by today's FX rate and divide by 31.1035. Today that is 887.13 CNY/g.

Step two: divide the quote by parity

A shop quotes 95,000 CNY for a 100 g bar, or 950 per gram. 950 ÷ 887.13 − 1 = 7.1%. Expensive — buy at that level and gold has to rise 7.1% before you break even.

If the quote is 90,500 CNY, or 905 per gram, the premium is 2.0%, inside the normal band, and worth negotiating.

Step three: pin down the buyback terms

This is the step most people skip. A 2% buying premium and a 3% buyback discount is 5% round trip. Always ask three questions: at what price do you buy back (the day's benchmark or the shop's own list), is there a handling fee, and do you need the original packaging and certificate. Some shops have a low buying price and squeeze the buyback harder still, taking the round trip to 8%.

8. Five common misconceptions

1. "Shanghai gold is a domestic price, unrelated to the international market." Wrong. The Shanghai benchmark is essentially the international price times the FX rate plus a premium, with very high correlation. If international gold falls 5%, Shanghai gold falls almost in step, just a few hours later. To read the trend, still watch XAUUSD.
2. "A high premium means gold is about to rise." It does not follow. A high premium means domestic spot supply is tight — possibly a buying rush, possibly a quota squeeze, possibly FX expectations. In 2024 there were several occasions when the premium spiked and gold then pulled back. The premium is a sentiment indicator, not a directional one.
3. "A shop's quote minus fabrication is the gold price." Wrong. A jewellery quote includes fabrication, brand premium, 13% tax, rent and staff, so converted to a pure-gold per-gram price it is often 15%–30% above parity. Buying jewellery is consumption, not investment.
4. "An ounce equals a tael." Wrong. 1 ounce is 31.1035 g, 1 market tael is 37.5 g — a 20% difference. The Hong Kong tael is 37.429 g. Mixing these three units is the most common source of arithmetic error.
5. "Buying gold when the exchange rate is low is a guaranteed win." Not necessarily. FX carries a 0.3%–0.8% bid-ask, gold itself has averaged a 1.45% daily high-low range over the last 27 trading days, and FX and gold can move together or against each other. Stack the two costs and you can be right on direction and still not make money.

A figure to give a sense of the scale of volatility: over the last 27 trading days gold fell from 4,364.33 to 4,123.85, a drop of 5.51%, with a range high of 4,393.33 and low of 4,073.93, an average daily high-low range of 1.45% and a worst single day of 3.60%. In other words, one month of ordinary volatility is enough to eat a 3% premium twice over. Which is why agonising over a few dozen yuan of premium matters less than fixing your position size and stop first. For how to size, see how to size a position.

9. Frequently asked questions

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