定 額(ていがく)

ていがく

noun

flat rate; fixed amount

1. flat rate; fixed amount; set price

A predetermined, unchanging price or fee regardless of usage amount, commonly used for service plans and subscriptions.

定額(ていがく)制(せい)だから使(つか)い放題(ほうだい)だ。

It's a flat rate, so you can use it as much as you want.

定額(ていがく)プランに変更(へんこう)した。

I switched to a flat-rate plan.

動画(どうが)サービスは定額(ていがく)で見(み)放題(ほうだい)のものが多(おお)い。

Many video streaming services offer unlimited viewing for a flat fee.

Compound of 定(てい) (fixed) + 額(がく) (amount). Refers to a set, unchanging price or quantity, widely used in subscription and service plan contexts.

Common collocations

定額(ていがく)制(せい): flat-rate system
定額(ていがく)プラン: flat-rate plan
定額(ていがく)サービス: flat-rate service
定額(ていがく)給付金(きゅうふきん): fixed-amount benefit/stipend

Similar words

従量(じゅうりょう)制(せい): pay-per-use, metered (opposite pricing model)
変動(へんどう): variable, fluctuating

Related words

月額(げつがく): monthly fee
年額(ねんがく): annual fee
使(つか)い放題(ほうだい): unlimited use (often paired with 定額(ていがく))

With the rise of subscription services (streaming, software, etc.), 定額(ていがく)制(せい) and サブスク (subscription) have become everyday terms in Japan.

Related Words

Related: 月額(げつがく) (monthly fee)

Related: 年額(ねんがく) (annual amount)

Related: 使(つか)い放題(ほうだい) (unlimited use)

Compare: 従量制(じゅうりょうせい) (pay-per-use, metered)

Compare: 変動(へんどう) (variable, fluctuating)

Related: 食(た)べ放題(ほうだい) (all-you-can-eat)

general

Added 2026.2.3 16:21 · Revised 2026.9.2 13:01

09500/09740_teigaku