Learn Swedish: Förutsättningen är att vi debiterar för tiden. - The condition is that we charge for the time.

Förutsättningen comes from the verb att förutsätta (to assume, to presuppose). As a noun, en förutsättning usually means a prerequisite, condition, or premise. In this context, it means that charging for the time is the fundamental requirement for a deal or project to happen.

Could I use the lesson's target phrase, i den mån, to express a similar idea?

Yes! If you wanted to link this to the current lesson and say 'We will do it to the extent that we charge for the time,' you could say Vi gör det i den mån vi debiterar för tiden. While förutsättningen är att establishes a strict yes-or-no condition, i den mån expresses a matter of proportion or scope.

Is debiterar the most common word for 'charge' in Swedish?

Att debitera is a formal, business-oriented word specifically meaning to bill or invoice someone. In everyday situations, like a café charging for an extra shot of espresso, you would instead use the phrase att ta betalt.

Why use the definite form tiden instead of just tid?

Because the sentence refers to the specific time spent on a given task, not time as an abstract concept. If you said debiterar för tid, it would sound strangely philosophical, as if you were billing the client for the existence of time itself.