noun
expense ratio
Financial term for the proportion of costs to revenue, assets, or another base figure. Common in business, accounting, and investment contexts.
この投資信託の経費率は年0.5%です。
The expense ratio of this mutual fund is 0.5% per year.
経費率が高いと利益が圧迫される。
A high expense ratio puts pressure on profits.
費用対効果 is 'cost-effectiveness', focusing on the balance between cost and benefit, whereas 経費率 is a pure financial ratio.
Compound of 経費 (expenses) and 率 (rate, ratio). A straightforward Sino-Japanese financial term.