Global Systemically Important Bank (G-SIB)

G-SIB stands for global systemically important bank. These banks are large and interconnected enough that their failure could destabilize the global financial system. They carry requirements on top of the Basel III minimums that every internationally active bank already meets.

Who decides which banks are G-SIBs?

The Financial Stability Board (FSB) publishes the list every November, working with the Basel Committee on Banking Supervision (BCBS) and national authorities. The BCBS methodology scores banks on 13 indicators grouped into five categories: size, interconnectedness, substitutability, complexity and cross-jurisdictional activity. Each list uses data from the end of the previous year, and in recent years it has named around 30 banks.

What does being a G-SIB mean for a bank?

• It holds an extra capital buffer. Each G-SIB is placed in a bucket, and higher buckets carry larger surcharges, from 1% to 3.5% of risk-weighted assets. A new list's buffers apply from January of the year after next, giving banks about 14 months to adjust.
• It must meet the total loss-absorbing capacity (TLAC) standard. TLAC is capital and debt that can absorb losses if the bank fails, so it can be resolved without a taxpayer bailout.
• It must plan for its own failure. This means group-wide resolution plans and regular resolvability reviews by the FSB and the bank's crisis management group.
• It faces higher supervisory expectations for risk management, risk data and internal controls.

National regulators also designate domestic systemically important banks (D-SIBs), which can carry their own capital add-ons.

How do G-SIBs handle crypto and stablecoins?

Two sets of rules meet here. The Basel Committee's prudential standard for banks' cryptoasset exposures has applied since January 1, 2026. It sets how much capital a bank holds against crypto-assets and stablecoins on its balance sheet. The Committee has also been running a targeted review of parts of that standard during 2026.

When a G-SIB moves value on-chain for a customer, it has the same Travel Rule (R.16) obligations it has for a wire. It must collect and share originator and beneficiary information, and know who sits on the other side of the transfer before value moves.

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Related terms: SIPS, Financial Institution (FI), Travel Rule, R.16.