Carbon Trade eXchange (CTX) has launched a flat-fee trading service for large institutional participants in the voluntary carbon market, pricing trades at US$0.10 per credit, per side and eliminating its account-opening charge for the first time in its 18-year history.

The Australia- and UK-based exchange announced the service, CTX Corporate One, on September 22. It targets major project developers, corporate offtake brokers, banks, institutional trading desks and companies trading high-quality carbon credits at scale.

The invitation-only platform replaces CTX's standard percentage-based commissions with the flat per-credit fee. There is no account-opening fee and no minimum balance requirement. The pricing applies to trades in credits typically valued at more than $10 per tonne of CO2 equivalent.

Built on 18 Years of Continuous Clearing

CTX brings considerable operating history to the new offering. The exchange has operated continuously for more than 18 years without a trade default and has cleared more than 1 billion tonnes of CO2e offsets. Its marketplace currently lists more than 320 projects across over 40 countries.

Corporate One provides round-the-clock electronic settlement, with trades clearing under CTX's Continuous Trading Contract. Buyers can purchase credits either for transfer or retirement without maintaining their own registry accounts, the exchange said.

Members gain access to millions of credits across different projects, vintages and price levels. CTX also supplies live foreign-exchange rates through Westpac Bank and generates invoices and statements at execution. An in-house trading desk will assist members with sourcing credits and constructing portfolios.

A Pricing Break the Exchange Has Never Made

Founder and chief executive Wayne Sharpe framed the move as a first for the exchange's largest clients.

"We've never gone to zero on our account fee, and we've never dropped a percentage commission for our biggest members, until now," Sharpe said.

The shift matters for the arithmetic of large-volume trades. On a percentage commission, a single million-credit transaction in higher-priced units — the segment above $10 per tonne that Corporate One targets — carries a substantial fee burden that a flat $0.10 per credit, per side structure caps at $100,000 per side regardless of credit price. For institutional desks trading scale, the pricing converts transaction costs from a variable linked to credit quality into a fixed, predictable input.

Access to Corporate One is by invitation. Eligible organizations can request consideration directly from CTX.

What Comes Next

The service enters a voluntary carbon market where institutional participation increasingly depends on execution infrastructure: registry-free settlement, portfolio construction support and predictable fee structures. CTX has staked its institutional push on all three, backed by an 18-year default-free clearing record and more than 1 billion tonnes cleared.

The milestone to watch is adoption. Whether Corporate One's invitation-only membership converts the exchange's clearing record into institutional order flow — and at what volume — will determine if flat-fee pricing becomes a competitive standard or a single exchange's experiment.