Article 28. The insured employer shall annually report the estimated amount of premium. The estimated premium shall be calculated by multiplying the estimated total wages of all employees for every insurance year from April 1 to March 31 in the following year (or from the effective date of the insurance to March 31, in case the effective date is later than April 1) by the premium rate, plus other charges required by Ordinance. The report shall be submitted before the end of March (or within 5 days from the effective date of the insurance, in case the effective date is later than April 1). The estimated amount of premium shall be paid within 30 days from April 1 (or 30 days from the effective date of the insurance, in case the effective date is later than April 1).
In case the term of the enterprise is known in advance, the insured employer, irrespective of the provisions of the preceding paragraph, shall report the estimated amount of premium by 10 days before the effective date of the insurance (or by the effective date of the insurance, in case there is a special reason). The estimated amount of the premium shall be calculated by multiplying the estimated total wages of all employees during the expected term of the enterprise by premium rate, plus other charges required by Ordinance. The estimated amount of premium shall be paid within 14 days from the effective date of the insurance.
The insured employer shall be permitted by request to pay the estimated amount of premium prescribed in the preceding two paragraphs by instalments as provided by Ordinance.
In case the insured employer does not submit the report stipulated in Par.1 or Par.2, or in case the Government deems the report faulty, the Government shall, after making investigation, calculate the estimated amount of premium and collect the amount or the difference as the case may be.
Article 29. In case the estimated total amount of wages in the preceding Article is increased by more than 20 per cent, the insured employer shall make a new report of the estimated amount of premium calculated on the basis of the estimated total amount of wages after the increase and other matters provided by Ordinance within five days from the date of increase, and pay the difference within 30 days from the date of increase.