The mines of Tyrol remained an important source of revenue for Frederick and not until 1446, upon the end of his regency, Sigismund could accede to rulership over the Further Austrian (Vorderösterreich) possessions, which also included the Swabian territories of the Sundgau in southern Alsace, the Breisgau, and numerous smaller estates.

[1] Sigismund, represented by Ludwig von Landsee, married Princess Eleanor of Scotland, the daughter of the Stuart king James I, on 8 September 1449, in an Augustinian church near Chinon.

In 1469, Sigismund sold several of his Swabian lands on the Rhine river, including the Alsace landgraviate, the County of Pfirt (Ferrette), the Breisgau and further cities, to the Burgundian Duke Charles the Bold.

In turn, he extended his Vorarlberg possessions, purchasing the County of Sonnenberg in 1474 and, together with the Swiss (with whom he had concluded a peace treaty in Konstanz) and the Alsatian cities, he sided against Duke Charles of Burgundy in the Battle of Héricourt.

In the later years of the 1470s and early 1480s Sigismund issued a decree that instituted a radical coinage reformation that eventually led up to the creation of the world's first really large and heavy silver coin in nearly a millennium, the guldengroschen, which the Habsburgs in Bohemia developed later into the thaler.

By 1490 the opposition of Tyrolean nobles compelled Sigismund to hand over the rulership to Frederick's son Archduke Maximilian, who later succeeded his father as Holy Roman Emperor.