The Organization may require a mutual aid policyholder who pays a premium after the payment due date to pay a surcharge.
The amount of the surcharge must not exceed the amount calculated on the amount of the premium at the rate of 14.6 percent per annum for the number of days from the day following the payment due date to the day preceding the day of payment.
割増金の額は、掛金の額につき年十四・六パーセントの割合で納付期限の翌日から納付の日の前日までの日数によつて計算した額を超えてはならない。
Read this with the articles around it
the Organizationmachine translation
「機構」
The Organization for Workers' Retirement Allowance Mutual Aid (独立行政法人勤労者退職金共済機構), an incorporated administrative agency, throughout this Act except Articles 56 and 57.
Short name set inArticle 2, paragraph (3)· applies from here on, except in Articles 56 and 57
mutual aid policyholdermachine translation
「共済契約者」
An employer (事業主) that is a party to a retirement allowance mutual aid contract (退職金共済契約) or a specified-industry retirement allowance mutual aid contract (特定業種退職金共済契約).
Defined inArticle 2, paragraph (6)· applies throughout the law