National Pension Act Article 13

Calculation of insurance premiums will start from the specific date when the insurance takes effect for the insured person until the specific date of stoppage or termination of the effect. If the actual insured days of the specific month when the insurance comes into effect, stops, or terminates are less than a full month, it is calculated proportionally by the actual insured days (on the basis of 30 days per month).The insurer will calculate the insurance premium paid by the insured persons on a bi-monthly basis. Written notice of the insurance premium bill will be sent by the end of the third month, requesting that the insured persons pay their insurance premium through account transfer by financial institutions or other methods designated by the insurer by the end of the fourth month.If the insured persons join the insurance for less than a full month, the insurer is entitled to calculate their monthly insurance premium based on their next insurance premium. However, the notice of insurance premium bill shall be sent at least once a year.The insured person is eligible to pay the insurance premium in advance. The prepaid period is limited to one year.Insurance premium paid by the insured person during the validation of the insurance is non-refundable. However, insurance premium over-paid or paid by mistakes, which cannot be blamed on the insured person, is not included.The insurer is entitled to calculate the insurance premiums paid by the government at all levels under this Act by the end of May and November, respectively. In addition to the insurance premium paid by the insured person for the previous six months, which is eligible for full coverage by the government at all levels, an additional 15% of any unpaid insurance premiums by the insured person must also be calculated. Deadlines for insurance premiums paid by the government of all levels are the end of June and December, respectively, and the stipulations of this paragraph are traced back to October 1, 2008. Before the implementation of amendments to this Act on June 13, 2011, the difference between insurance premiums paid by the government of all levels and insurance premiums calculated by the insured person who had paid shall be deemed as prepaid insurance premiums for the government of all levels.The insurer is entitled to report various governments’ failure to pay their share of insurance premiums under this Act to the central competent authority, which will then request that the Executive Yuan deduct the amount payable from the subsidy to each specific institution.
中文原文 國民年金法第13條
保險費之計算,自被保險人保險效力開始之當日起至保險效力停止或終止之當日止。
保險效力開始、停止或終止之當月未全月加保者,依實際加保日數按每月三十日比率計算保險費。
被保險人應負擔之保險費,由保險人按雙月計算,於次月底前以書面命被保險人於再次月底前,以金融機構轉帳或其他保險人指定之方式,向保險人繳納。
被保險人應負擔保險費未達全月份保險費金額時,保險人得於累積達全月份保險費金額後,於下次計算保險費時一併結算。
但一年至少應寄發一次繳款單。
被保險人得預繳一定期間之保險費,其預繳保險費期間以一年為限。
被保險人應負擔之保險費於繳納後,不予退還。
但非可歸責於被保險人之事由所溢繳或誤繳者,不在此限。
各級政府依本法規定應負擔之保險費,由保險人於每年五月底及十一月底,除依前六個月已繳納保險費之被保險人及政府全額負擔保險費之被保險人計算外,並加計前條各級政府應負擔未繳費之被保險人保險費之百分之十五;各級政府應於六月底及十二月底前繳納,並溯自中華民國九十七年十月一日施行。
本法一百年六月十三日修正之條文施行前,各級政府已繳納之保險費,與依被保險人繳費情形計算之差額,視為各級政府預繳之保險費。
各級政府未依本法規定繳納應負擔之保險費時,保險人得報請中央主管機關轉請行政院,自各該機關之補助款中扣減抵充。

English translation for reference only; the Chinese text prevails. Not legal advice.