1.
a fixed amount of money; a set sum
A predetermined, set sum of money — for example, a fixed monthly allowance, a flat fee, a fixed deductible, or a threshold below which special rules apply. 一定額 appears constantly in financial, legal, tax, and contractual writing where a numeric amount is held constant or compared against a threshold.
毎月一定額を貯金している。
I save a fixed amount every month.
一定額以上の支出には上司の承認が必要だ。
Expenditures above a fixed amount require the approval of a superior.
この{制度}では、所得が一定額を超えると支援の対象から外れる。
Under this system, you fall outside the scope of support if your income exceeds a fixed amount.
老後の備えとして、給料から自動的に一定額を投資信託に回している。
As preparation for old age, I automatically channel a fixed amount from my salary into mutual funds.
一定額 is a standard administrative and financial term meaning "a fixed amount" of money.
FORMATION:
- 一定 ("fixed, set, constant") + 額 (from 金額 "amount of money") → 一定額
TYPICAL CONTEXTS:
- Personal finance and saving plans (一定額を貯金する "to save a fixed amount")
- Tax and welfare thresholds (一定額以上の所得 "income above a certain amount")
- Insurance deductibles, copay caps, and grant limits
- Corporate expense-approval rules
- Government subsidies and benefit programs
COMMON COLLOCATIONS:
- 一定額以上: a fixed amount or more (a threshold above which something applies)
- 一定額以下: a fixed amount or less (a threshold below which something applies)
- 一定額を超える: to exceed a fixed amount
- 一定額に達する: to reach a fixed amount
- 毎月一定額: a fixed amount each month
- 一定額まで: up to a fixed amount
SIMILAR / RELATED TERMS:
- 一定: fixed, set, constant — the broader adjective; modifies many nouns (一定の条件 "certain conditions")
- 定額: fixed amount, flat rate — closely related and often interchangeable; 定額制 "flat-rate plan" is a common service category. 定額 feels more set-in-advance / contractual; 一定額 more often functions as "a (single) certain amount" used as a threshold.
- 限度額: maximum amount, ceiling
- 上限 / 下限: upper / lower limit
- 金額: monetary amount (general)
USAGE NOTES:
- 一定額以上 is an extremely common phrase in administrative and policy writing, equivalent to "a certain (specified) amount or more" in English.
- For consumer subscription pricing ("flat rate"), 定額制 is the standard label, not 一定額制.