noun
communication expenses; phone bill; internet bill; postage
Covers costs for phone, internet, postage, and other communication services. Often used in household budgets or business expense categories.
今月の通信費が高すぎる。
This month's communication expenses are too high.
通信費を節約するために格安SIMに変えた。
I switched to a budget SIM to save on communication costs.
交際費 is for social or entertainment expenses, not communication costs.
Compound of 通信 (communication) and 費 (expense, cost).