ISO 20022 and the Quiet Rewiring of Banking

If you work in finance long enough, you get used to buzzwords. Crypto, DeFi, tokenisation – they’ve all taken a turn as the “next big thing”. Underneath the noise, though, there is a quieter, more structural shift happening: the global banking system is being rewired onto new messaging and data standards, and that opens the door for decentralised finance to move from fringe to infrastructure over the next decade.

ISO 20022 is the boring‑sounding standard that sits at the centre of this. It’s a global financial messaging standard that allows payment and transaction data to be richer, more structured and more consistent across banks, markets and borders. In plain language, it’s a common language for money moving around the world. By November 2025, major payment systems are required to be compliant or at least fully able to handle ISO 20022 messages, which is a big lift behind the scenes even if most customers never hear the acronym.

Why does that matter for DeFi and tokenisation? Because once you standardise and digitise the way value is described and transmitted, it becomes far easier to represent traditional assets as tokens on distributed ledgers. A bond, a property interest, a loan participation – all of these can be modelled as digital objects that “speak” a common data language, settle more quickly, and plug into different systems without bespoke plumbing each time.

In that world, decentralised finance starts to look less like a parallel casino and more like a layer of programmable infrastructure. You can imagine a future where:

• A mortgage, a corporate loan, or a receivables facility is originated by a bank or a specialist lender.
• The cashflows and rights are represented as tokens on a permissioned blockchain, with ISO 20022‑compliant messages carrying instructions and data between institutions.
• Investors access those positions through regulated platforms that sit on top of decentralised rails, with smart contracts handling distributions, covenant tests and reporting.

From a bank’s perspective, this is both threat and opportunity. On one hand, tokenisation and decentralised settlement can disintermediate some of the value chain – especially in custody, agency and payments. On the other, banks are still well placed to handle onboarding, credit assessment, and the heavy compliance lifting. The likely end‑state isn’t a world without banks, but one where banks use DLT as core infrastructure and compete on experience, risk insight and service rather than manual processing.

There are some obvious caveats. DeFi in its current, fully open form carries serious issues around governance, security, and regulatory oversight. Most institutional adoption will happen on permissioned or consortium chains where participants are known, rules are enforced, and regulators can see what’s going on. That’s less glamorous than the “code is law” crowd might like, but it’s the only way you get superannuation funds, insurers and banks truly comfortable putting meaningful size on chain.

Over the next few years, ISO 20022 will quietly do the heavy lifting by giving everyone a common data foundation. Regulators will keep pushing for transparency and control. Meanwhile, tokenisation pilots will move from press releases into actual balance sheets, especially in areas like trade finance, securitisation, and cross‑border payments. If you zoom out, you can see the outline of a future where blockchain and distributed ledgers aren’t a bolt‑on experiment – they’re just the pipes the system runs on.

When we look back from, say, 2030, the headline might not be “DeFi killed banking”. It may be closer to “banking absorbed DeFi’s best ideas”, with asset tokenisation and DLT sitting under the hood of everyday financial products. ISO 20022 compliance in November 2025 will feel like just another deadline, but it’s one of those quiet milestones that make the next phase possible.