The BIS unified ledger vision

The unified ledger is the central banks’ own answer to a question usually asked by their critics: if you could rebuild the financial system’s plumbing from scratch, what would it look like? The BIS published its answer in the 2023 edition of its Annual Economic Report, and the design has since become the reference point for nearly every official-sector settlement project. One programmable platform holding tokenized central bank money, tokenized commercial bank deposits, and tokenized assets, so that transactions which today crawl across separate systems complete as single operations.

What the blueprint says

Today’s system separates functions into silos. Messages travel on one network, money moves on others, securities settle on others still, and reconciliation stitches the records together after the fact. Every seam is a source of delay, cost, and risk: the payment that arrives before its confirmation, the pre-funded account waiting for a settlement window, the trade where one leg completes and the other fails.

The unified ledger removes the seams by putting the components in one place. Money and assets become tokens on a shared programmable platform; a transaction becomes a piece of logic that moves them together. Atomic settlement stops being an engineering feat and becomes the default: delivery versus payment, payment versus payment, or any conditional sequence, executed all-or-nothing. The BIS calls the bundling of steps composability, sequences of financial transactions integrated and automated on the platform itself.

The 2025 report sharpened the design into what it calls the trilogy: tokenized central bank reserves, tokenized commercial bank money, and tokenized government bonds on one venue. The ordering is deliberate. The blueprint keeps the two-tier monetary system, with central bank money as the settlement asset between banks and commercial bank money as what customers hold, preserving the singleness of money that gives the current system its coherence.

From paper to prototype

The vision is being tested. Project Agorá, convened by the BIS with eight central banks and more than 40 financial institutions, is the unified ledger’s cross-border expression: tokenized reserves and tokenized deposits on one platform, applied to correspondent banking’s frictions. Its May 2026 prototype demonstrated atomic multi-currency settlement and a layered architecture in which each central bank keeps control of its own currency, and the work is advancing toward real-value testing.

National experiments run in parallel: the UK’s tokenised sterling deposit pilot grew out of the Regulated Liability Network work, and wholesale central bank digital currency trials continue in Europe and Switzerland. Each tests a piece of the blueprint.

The honest distance

None of this is a live system. The BIS presents Agorá as experimental, built to investigate feasibility, with no production timeline. The 2023 blueprint itself was explicit that a unified ledger need not be one global ledger, and that multiple ledgers, each serving a jurisdiction or purpose, are the likelier outcome. Official-sector infrastructure moves on decade horizons, and the political economy is harder than the technology: who operates the platform, who is admitted, and whose law governs it are questions no prototype settles.

Meanwhile the fragmentation the blueprint diagnoses is accelerating. Bank consortium ledgers, single-bank token networks, stablecoin rails, and regional platforms such as mBridge are all live or advancing, and none of them settle natively with one another. The plausible medium-term future is many partial ledgers, unified only in ambition.

Where Frame fits

Frame is the settlement layer for modern finance. Through configured integrations, Frame Rules checks the institution's policy before release, and Frame Proof seals the outcome reported by the customer's execution platform.

The customer's platforms execute the transaction. Rail coverage, execution timing and finality depend on the configured integration and the underlying systems. The institution remains responsible for its policies, permissions and operating controls.

See how a rail-neutral settlement layer works: the Frame Blueprint.