noun
sliding scale system
A system where rates, prices, or payments adjust according to a variable such as income, usage, or age. Common in contexts like tax brackets, utility pricing, or tuition fees.
この病院では、所得に応じたスライド制の医療費を導入している。
This hospital has introduced a sliding-scale medical fee system based on income.
電
The electricity rates are on a sliding scale according to usage.