What does going Dutch mean?
Going Dutch means each person pays their own share of a shared bill: what they ordered, plus their portion of the tax and tip. Nobody treats, and nobody is treated. It is the opposite of one person picking up the check. In its strict sense it is also different from splitting evenly, where the total is divided by headcount regardless of who ordered what.
In everyday use the phrase is looser than that. The etymology site word histories defines to go Dutch as “to have every participant pay for his or her own expenses, also to share expenses equally” — so when a friend suggests going Dutch, they might mean either. Ask which one. The difference is where most of the money moves.
Each person pays for their own food and drinks. The default meaning in American English, and the itemized version of the idea.
An outing where every participant pays their own share. The noun that the verb phrase “go Dutch” was later clipped from.
Can mean going Dutch (itemized) or dividing the total evenly. Context decides which — always clarify before ordering.
Asking the server for individual bills. The restaurant handles the going-Dutch arithmetic for you — when it agrees to.
The critical distinction: going Dutch in its strict sense (paying for what you ordered) is not the same as splitting evenly (dividing the total). In Gneezy, Haruvy and Yafe’s 2004 restaurant field experiment, diners who knew the bill would be split evenly ordered an average of 50.9 shekels of food, against 37.3 shekels when each paid individually — about 36% more — because under an even split everyone orders as if someone else is subsidizing their meal. Going Dutch removes that incentive.
Sources: word histories, “Origin of ‘Dutch treat’ and ‘to go Dutch’,” 2018; Gneezy, Haruvy & Yafe, The Inefficiency of Splitting the Bill, The Economic Journal, 2004 (Table 1)