invisible balance
Noun
Meaning
the difference in value over a period of time of a country's imports and exports of services and payments of property incomes
Source: WordNetHypernyms
Examples
For countries that rely on service exports or on tourism, the invisible balance is particularly important.
The invisible balance or balance of trade on services is that part of the balance of trade that refers to services and other products that do not result in the transfer of physical objects.
The term 'invisible balance' is especially common in the United Kingdom.