Stablecoin Supply Flat at $305 Billion as Payment Volume Rises 45%

Stablecoin circulation rose just 0.4% to $305 billion between January and September this year, while payment volume climbed 45% to $482 billion over the same period, according to data from blockchain analytics firm Allium reported by CoinDesk on November 9. The divergence frames a market where the same dollar of liquidity is working harder, not a market that is growing its balance sheet.

The transaction counts tell a similar story. Payment transactions increased 71% to 1.04 billion in the first nine months. September alone set a record monthly high of $72 billion in payment volume. The takeaway in plain words: more payments are flowing through a stablecoin base that has barely expanded.

What is driving the gap between supply and payments?

The answer, according to industry participants, is capital turnover. Tianwei Liu, chief executive officer of Singapore-based stablecoin issuer StraitsX, said the same pool of liquidity can support multiple payments, meaning issuance does not need to rise in step with transaction growth. His claim carries a caveat the raw data does not resolve: higher turnover also means the same supply can mask a shallower liquidity buffer if payment demand reverses.

Standard Chartered data quantifies the shift. Average monthly stablecoin turnover doubled to roughly 30 times this year, from about 15 times last year. In practical terms, each stablecoin dollar now changes hands about twice as often each month as it did a year ago.

Circle, the issuer of USDC, shows the same pattern at the issuer level. USDC circulation stood at $73.9 billion at the end of the third quarter, unchanged from a year earlier, while on-chain transaction volume rose 49% to $13.9 trillion. Circle Chief Executive Officer Jeremy Allaire said balances were flat but usage continued to grow. That comparison deserves scrutiny: on-chain transaction volume includes crypto trading and fund transfers alongside actual payments, so the 49% figure overstates payment-specific growth.

Are AI agents becoming a real payment channel?

AI agent payments doubled quarter over quarter to 68.3 million transactions in the third quarter, Allium reported. The count is striking; the value is not. Total AI agent payment volume reached just $3.7 million, putting the average transaction at roughly 5 cents.

That arithmetic limits what the headline growth can mean. Experts expect AI payments to lift transaction counts, but their effect on expanding stablecoin supply is likely to remain limited while per-transaction values stay near the nickel level.

Why has stablecoin supply stalled?

The primary brake is crypto trading demand, not payments. Trading volumes have fallen by more than 50%, reducing the stablecoin liquidity needed on exchanges and in derivatives markets. Geoff Kendrick, Standard Chartered's head of digital assets research, said the recent supply stagnation was a cyclical effect tied to a market downturn rather than a structural shift.

His framing is a judgment, not a verified fact, and it rests on the assumption that trading demand recovers. If it does not, flat issuance may prove less cyclical than advertised. Even now, payment growth has not fully offset weaker trading demand. Allium found that real payment volume accounted for only about 0.5% of the $97.9 trillion in total stablecoin on-chain transfer volume from January through September. To put that in scale: for every $200 moving on stablecoin rails, roughly $1 was an actual payment.

The average stablecoin payment size also fell to $462 from $544, a sign that smaller transactions are becoming more common even as aggregate volume rises. That trend points toward retail and operational use cases rather than large institutional settlement, though the data does not break down the payer mix.

What should market participants watch?

Experts said assessments of stablecoin market growth should distinguish actual payment usage from issuance totals and overall on-chain transaction volume. Each metric tells a different story this year: issuance is flat, on-chain volume is enormous, and payments are growing fast from a small base.

The record September figure of $72 billion suggests the payment trajectory has further room to run into the fourth quarter. Whether supply follows depends on trading demand returning — a condition Kendrick calls cyclical but which the data alone cannot yet confirm.