What is the difference between a currency issuer and a currency user?

This distinction is central to understanding MMT and why the household budget analogy is so misleading.

A currency user - like you, me, a business, a state government, or a country using someone else's currency (like Greece using euros) - must obtain currency before it can spend. Currency users face real financial constraints: they can run out of money, default on debts, and go bankrupt.

A currency issuer - like the US federal government with dollars, Japan with yen, or the UK with pounds - creates the currency. It doesn't need to earn or borrow currency before spending; it creates currency in the act of spending. A currency issuer can never involuntarily run out of its own currency or be forced to default on debts denominated in that currency.

Warren Mosler uses a simple analogy: imagine a parent who creates coupons to pay children for doing chores. The parent doesn't need to collect coupons before issuing them - that would be absurd. The parent creates coupons as needed. Similarly, the federal government doesn't need to collect taxes before spending; it creates dollars as needed.

The constraint for a currency issuer isn't financial - it's real resources and inflation. This doesn't mean spending has no consequences, but the consequences are different than for currency users.