Tying contract

A tying contract, tying arrangement or tie-in sale is a condition imposed by a powerful seller that requires buyers to purchase goods in addition to the desired good. For example, a tying arrangement would be if Microsoft required buyers to purchase other software as a condition of purchasing Windows.

Tying arrangements are disfavored and may violate the antitrust laws, particularly if the seller has market power or a monopoly.

## See also[edit]

* Tying
* Sherman Act Section One