One of the grandest achievements of the original Star League was the unification of the disparate economies of its member states under a single currency - the Star League Dollar - in 2623. The single economic system ensured an unparalleled boom in trade only to be sundered by the Amaris Coup. Following the collapse of the Star League, each of the five Successor Lords issued new "Star League" currency bearing their likeness befitting their claims of being the sole First Lord, offering sharply unfavourable exchange rates to exchange the old money for the new to help fund their war efforts. In time as it became clear that none would successfully defeat their opposition, these currencies evolved into their current form, reflecting their own cultural preferences and biases.     
- The Kroner or S-Bill - Lyran Commonwealth/Lyran Alliance
- The Pound or D-Bill - Federated Suns
- The Eagle or M-Bill - Free Worlds League
- The Kona or R-Bill - Free Rasalhague Republic
- The Yuan or L-Bill - Capellan Confederation
- The Ryu or K-Bill - Draconis Combine
- The Star League, pp. 54-55 "Economic and Scientific Advances"
- MechWarrior 1st Edition, p. 6 "A History of Human Space, 2001-3025 - The Good Years (2601-2750)"
- MechWarrior 2nd Edition, pp. 109-11 "Historical Overview - The Good Years (2601-2750)"
- Historical: Reunification Wars, pp. 165-166 "Aftermath - Good Years - The Second Invasion"
- MechWarrior Second Edition, p. 144 "Economics - Currency - House Bills (H-Bills)"
- MechWarrior Third Edition, pp. 180- "Society and Cultre - Local Currencies and Exchange Rates"