Every USDT token in circulation is backed by Tether's reserve portfolio. As of Q4 2025, Tether held over $181 billion in reserves against $174 billion in USDT liabilities, producing a $6.8 billion excess equity buffer. The largest component of these reserves — approximately $135 billion — is held in US Treasury bills, widely considered the safest short-term asset in the world. The remaining reserves include cash and cash equivalents, precious metals (principally gold stored in a Swiss vault), secured loans, and a smaller allocation to Bitcoin and other assets. Tether publishes daily transparency data on its website and quarterly attestations prepared by BDO, one of the world's top accounting firms. The Q4 2025 BDO attestation confirmed that Tether's reserves exceed its liabilities, which is the key condition required for the USDT peg to remain fully redeemable at $1.
Reserve Composition and Risk
RESERVE QUALITY
The quality and liquidity of reserves directly determines how reliably the tether peg can be maintained during periods of stress. US Treasury bills are highly liquid and can be sold within hours to fund large-scale redemptions. The volatile assets in Tether's portfolio — including Bitcoin (valued around $98 billion at peak 2025 prices) and gold ($129 billion) — introduce mark-to-market risk. A severe crash in these asset prices could theoretically shrink the reserve buffer. However, Tether's $6.8 billion excess equity provides a meaningful cushion. S&P Global has rated USDT's stability as 'Weak' (5/5) citing a reliance on attestations rather than full audits, which remains the primary institutional concern about the reserve backing of the tether peg.
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