If cashier tells you that:
I don't have change. Could you "pay exact amount of money"?
How to say "to pay exact amount of money" in good English?
English Language Learners Stack Exchange is a question and answer site for speakers of other languages learning English. It only takes a minute to sign up.Sign up to join this community
The most common phrase is "exact change", so you could say Exact change, please. While "change" is usually applied to coins rather than bills when talking about currency, it is acceptable when talking about the return of excess given during a purchase, "Here's your change."
And it is not always applied politely. This news story tells of a Canadian woman who was fined $219 for not having exact change when riding a bus.
There are lots of ways to say this. One would be:
Please, can you pay the exact amount? I don't have any change.
Related: Sometimes, if low on change, a cashier might ask:
Can you pay in small bills?
I've even seen signs that say SMALL BILLS APPRECIATED to indicate a cash box is running low on change.