SCT Inst: instant payments

IN ONE LINE

An everyday analogy: an ordinary SCT is a letter — reliable, but it works in daily collections and deliveries.

SCT Inst is a text message: it goes now, any hour, any day, and you watch for the delivery tick.

The tick matters as much as the message.

Within seconds, the sender's bank must learn whether the money is guaranteed to the recipient or definitely not coming, because the sender is standing at a checkout, or splitting a bill, waiting to see the answer.

That immediacy is the whole product — and it is also the whole engineering problem, because every system in the chain now has to answer in seconds, at three in the morning, on a public holiday.

WHAT IT ACTUALLY IS

SCT Inst is the EPC's instant credit transfer scheme: euro payments processed around the clock, every day of the year, with the funds made available to the beneficiary and a positive or negative confirmation returned to the originator's PSP within seconds.

The 2025 rulebook sets a target of five seconds for that confirmation to arrive, and EU law — the Instant Payments Regulation — caps the whole journey at ten seconds.

The instruction travels as a pacs.008, like a normal SCT, but the beneficiary PSP must answer immediately with a pacs.002 accepting or rejecting the payment, and once accepted the transfer is final from the originator's point of view: getting money back afterwards means a recall, not a cancellation.

HOW IT WORKS

For the institution, instant is an operating model, not a message format.

There are no batch windows to hide in: liquidity must be in place on the settlement account continuously, including weekends, which is why participants pre-fund positions at TIPS or RT1 rather than relying on daytime treasury.

Screening, fraud checks, and posting must all complete inside the seconds budget.

The hardest operational case is the timeout: if the confirmation does not arrive in time, the originator PSP cannot silently assume failure — the payment may have succeeded downstream — so it must resolve the true status through the scheme's inquiry procedure before telling the customer anything definitive.

Euro-area PSPs are now required by EU law to both receive and send instant credit transfers, so 'we do not offer instant' has stopped being an available answer.

THE WORDS

SCT Inst

The European Payments Council scheme for instant euro credit transfers: around the clock, with funds made available within seconds.

READ FIRST

• The SCT lifecycle

CONNECTED TO

• FLOW SEPA Instant Credit Transfer
• pacs.008 pacs.008 — FI to FI Customer Credit Transfer
• pacs.002 pacs.002 — FI to FI Payment Status Report
• CHECKPOINT SCT lifecycle checkpoint
• COMPARE SCT vs SCT Inst
• EXCEPTION LAB No confirmation at ten seconds: an instant payment with an unresolved outcome

SOURCES

• 2025 SEPA Instant Credit Transfer rulebook — European Payments Council
• What is TIPS? (TARGET Instant Payment Settlement) — European Central Bank
• EBA CLEARING payment systems (STEP2-T and RT1) — EBA CLEARING
• Payments Signal editorial teaching models — Payments Signal