Business operators must submit each insurance year a written declaration stating the amount of the following labor insurance premiums and other matters specified by Order of the Ministry of Health, Labour and Welfare within 40 days from June 1 of the following insurance year (in the case of extinction of the insurance relation in the midst of an insurance year, within 50 days from the day on which the insurance relation becomes extinct (in the case of Class I special enrollment insurance premiums pertaining to the businesses for which the approval set forth in Article 34, paragraph (1) of the Industrial Accident Insurance Act is revoked in the midst of an insurance year and Class III special enrollment insurance premiums pertaining to the businesses for which the approval set forth in Article 36, paragraph (1) of the Industrial Accident Insurance Act is revoked in the midst of an insurance year, the day on which the approval is revoked, respectively; the same applies in paragraph (3))).
事業主は、保険年度ごとに、次に掲げる労働保険料の額その他厚生労働省令で定める事項を記載した申告書を、次の保険年度の六月一日から四十日以内（保険年度の中途に保険関係が消滅したものについては、当該保険関係が消滅した日（保険年度の中途に労災保険法第三十四条第一項の承認が取り消された事業に係る第一種特別加入保険料及び保険年度の中途に労災保険法第三十六条第一項の承認が取り消された事業に係る第三種特別加入保険料に関しては、それぞれ当該承認が取り消された日。第三項において同じ。）から五十日以内）に提出しなければならない。
for businesses prescribed in Article 15, paragraph (1), item (i), the general insurance premiums calculated by multiplying the total amount of wages pertaining to all workers employed during the insurance year (in the case of establishment or extinction of the insurance relation in the midst of an insurance year, all workers employed during the period the insurance relation existed during the insurance year), by the general insurance premium rate in respect of the business;
第十五条第一項第一号の事業にあつては、その保険年度に使用したすべての労働者（保険年度の中途に保険関係が成立し、又は消滅したものについては、その保険年度において、当該保険関係が成立していた期間に使用したすべての労働者）に係る賃金総額に当該事業についての一般保険料率を乗じて算定した一般保険料
for businesses prescribed in Article 15, paragraph (1), item (ii), the following labor insurance premiums:
第十五条第一項第二号の事業にあつては、次に掲げる労働保険料
for businesses prescribed in Article 15, paragraph (1), item (ii), sub-item (a), the general insurance premiums calculated pursuant to the rule in the preceding item in respect of the total amount of wages pertaining to all workers employed for the business, and Class I special enrollment insurance premiums calculated by multiplying the total of the amounts specified by Order of the Ministry of Health, Labour and Welfare set forth in Article 13 for the insurance year, by the Class I special enrollment insurance premium rate for the business;
第十五条第一項第二号イの事業にあつては、その使用したすべての労働者に係る賃金総額について前号の規定の例により算定した一般保険料及びその保険年度における第十三条の厚生労働省令で定める額の総額に当該事業についての第一種特別加入保険料率を乗じて算定した第一種特別加入保険料
for businesses prescribed by Article 15, paragraph (1), item (ii), sub-item (b), the general insurance premiums calculated pursuant to the rule in the preceding item in respect of the total amount of wages pertaining to all workers employed for the business, and Class III special enrollment insurance premiums calculated by multiplying the total of the amounts specified by Order of the Ministry of Health, Labour and Welfare set forth in Article 14-2, paragraph (1) for the insurance year, by the Class III special enrollment insurance premium rate in respect of the business;
第十五条第一項第二号ロの事業にあつては、その使用したすべての労働者に係る賃金総額について前号の規定の例により算定した一般保険料及びその保険年度における第十四条の二第一項の厚生労働省令で定める額の総額に当該事業についての第三種特別加入保険料率を乗じて算定した第三種特別加入保険料
for businesses prescribed in Article 15, paragraph (1), item (ii), sub-item (c), the general insurance premiums calculated pursuant to the rule in the preceding item in respect of the total amount of wages pertaining to all workers employed for the business, and Class I special enrollment insurance premiums calculated pursuant to the rule in sub-item (a) in respect of the total of the amounts specified by Order of the Ministry of Health, Labour and Welfare set forth in Article 13 for the insurance year and Class III special enrollment insurance premiums calculated pursuant to the rule in sub-item (b) in respect of the total of the amounts specified by Order of the Ministry of Health, Labour and Welfare set forth in Article 14-2, paragraph (1) for the insurance year;
for businesses prescribed in Article 15, paragraph (1), item (iii), Class II special enrollment insurance premiums calculated by multiplying the total of the amounts specified by Order of the Ministry of Health, Labour and Welfare set forth in Article 14, paragraph (1) for the insurance year, by the Class II special enrollment insurance rate for the business.
第十五条第一項第三号の事業にあつては、その保険年度における第十四条第一項の厚生労働省令で定める額の総額に当該事業についての第二種特別加入保険料率を乗じて算定した第二種特別加入保険料
For businesses with a definite term, notwithstanding the provisions of the preceding paragraph, the business operator must submit a written declaration stating the amount of the following labor insurance premiums and other matters specified by Order of the Ministry of Health, Labour and Welfare within 50 days from the day on which the insurance relation becomes extinct (in the case of Class I special enrollment insurance premiums pertaining to a business for which the approval prescribed in Article 34, paragraph (1) of the Industrial Accident Insurance Act is revoked prior to the day on which the insurance relation becomes extinct, the day on which the approval is revoked; the same applies in the following paragraph):
for businesses prescribed in Article 15, paragraph (1), item (i), the general insurance premiums calculated by multiplying the total amount of wages pertaining to all workers employed during the whole period pertaining to the insurance relation, by the general insurance premium rate for the business;
第十五条第一項第一号の事業にあつては、当該保険関係に係る全期間に使用したすべての労働者に係る賃金総額に当該事業についての一般保険料率を乗じて算定した一般保険料
for businesses prescribed in Article 15, paragraph (1), item (ii), sub-item (a), the general insurance premiums calculated pursuant to the rule in the preceding item in respect of the total amount of wages pertaining to all workers employed for the business, and Class I special enrollment insurance premiums calculated by multiplying the total of the amounts specified by Order of the Ministry of Health, Labour and Welfare set forth in Article 13 for the whole period pertaining to the approval prescribed in Article 34, paragraph (1) of the Industrial Accident Insurance Act, by the Class I special enrollment insurance premium rate for the business;
第十五条第一項第二号イの事業にあつては、その使用したすべての労働者に係る賃金総額について前号の規定の例により算定した一般保険料及び労災保険法第三十四条第一項の承認に係る全期間における第十三条の厚生労働省令で定める額の総額に当該事業についての第一種特別加入保険料率を乗じて算定した第一種特別加入保険料
for businesses prescribed in Article 15, paragraph (1), item (iii), Class II special enrollment insurance premiums calculated by multiplying the total of the amounts specified by Order of the Ministry of Health, Labour and Welfare set forth in Article 14, paragraph (1) for the whole period pertaining to the insurance relation, by the Class II special enrollment insurance premium rate for the business.
第十五条第一項第三号の事業にあつては、当該保険関係に係る全期間における第十四条第一項の厚生労働省令で定める額の総額に当該事業についての第二種特別加入保険料率を乗じて算定した第二種特別加入保険料
If the amount of the labor insurance premiums paid is in short of the labor insurance premiums prescribed in the preceding two paragraphs, the business operator must pay the shortfall, or, if no labor insurance premiums have been paid, pay the labor insurance premiums prescribed in the preceding two paragraphs, with the written declaration prescribed in the preceding two paragraphs, within 40 days from June 1 of the following insurance year in the case of businesses other than the businesses with a definite term (in the case of extinction of the insurance relation in the midst of an insurance year, within 50 days from the day the insurance relation becomes extinct), or within 50 days from the day on which the insurance relation becomes extinct in the case of businesses with a definite term.
If the business operator fails to submit the written declaration set forth in paragraph (1) or (2), or the government finds any error in the entries in the written declaration, the government is to decide the amount of the labor insurance premiums and give notice thereof to the business operator.
The business operator that has received the notice pursuant to the provision of the preceding paragraph, if the amount of the labor insurance premiums paid is in short of the labor insurance premiums decided by the government pursuant to the provisions of the same paragraph, must pay the shortfall, or if no labor insurance premiums have been paid, pay the labor insurance premiums decided by the government pursuant to the provisions of the preceding paragraph, within 15 days from the day on which the notice is received; provided, however, that the provisions of this paragraph do not apply if the requirements specified by Order of the Ministry of Health, Labour and Welfare are met.
If the amount of the labor insurance premiums paid by the business operator exceeds the amount of the labor insurance premiums set forth in paragraph (1) or (2) (if the amount of the labor insurance premiums is decided by the government pursuant to the provision of paragraph (4), the amount decided; hereinafter referred to as the "amount of final insurance premiums"), the government, pursuant to the provisions of Order of the Ministry of Health, Labour and Welfare, is to appropriate the exceeding amount to the labor insurance premiums for the following insurance year, the labor insurance premiums in arrears, or to any other amount to be collected pursuant to the provisions of this Act, or refund that amount.
Read this with the articles around it