What USDT actually is
USDT (Tether USD) is a stablecoin issued by Tether Limited, backed by their claim of holding US dollar reserves equivalent to every USDT in circulation. Each USDT is designed to equal one US dollar. In practice it trades within a tight band of 0.999 to 1.001 USD.
Why it dominates offshore betting
It moves as fast as crypto (minutes, not days) with the price stability of fiat. When you deposit $500 of USDT, you deposit $500 of value, not some amount that will swing on the way. This is exactly what a sportsbook deposit should be.
The four main networks
Tron (TRC20) is cheapest, usually under $1 per transfer. Ethereum (ERC20) is slower and charges $2 to $20 in gas depending on congestion. Binance Smart Chain (BEP20) is cheap and fast but less widely accepted. Solana (SOL) is fast and cheap but newer at sportsbooks. For almost all cases, pick Tron (TRC20).
Matching networks is critical
If your sportsbook expects USDT-TRC20 and you send USDT-ERC20, the funds are usually lost forever. Always check the network on the sportsbook's deposit screen before selecting the same network on the exchange side. This one mistake causes more lost funds than anything else in crypto betting.
Confirmation times
TRC20: 1-3 minutes typical. ERC20: 2-15 minutes typical, longer during network congestion. BEP20: 1-2 minutes typical. Solana: under 30 seconds. Sportsbooks require 1 confirmation before crediting your balance.
Minimum deposit amounts
Most offshore books set minimum USDT deposits between $10 and $20. Maximum deposits are usually in the $10,000-$50,000 range per transaction with KYC for the higher brackets.
Testing the flow
On your first deposit with any new operator, start with the minimum. Verify the funds arrive. Withdraw a small amount. Verify they arrive back. Only then move real money.