58.—(1) Subject to paragraph (2), where an employer has not on or before the 14th day after the end of a tax year paid an amount which the employer is liable to pay to HMRC under regulation 54 for that tax year, that amount will carry interest at the rate applicable under section 178 of the Finance Act 1989(1) for the purposes of section 86 of the 1970 Act from that date until payment.
(2) Where payment is made by an approved method of electronic communications, the interest payable under paragraph (1) must be calculated as if the date in paragraph (1) was the 17th day after the end of the tax year.
(3) Interest payable under this regulation is recoverable as if it were an amount which the employer was liable to pay under regulation 54.
(4) An amount to which paragraph (1) applies carries interest from the day mentioned in that paragraph even if that date is a non-business day within the meaning of section 92 of the Bills of Exchange Act 1882.
(5) A certificate of HMRC that to the best of its knowledge and belief, any amount of interest payable under this regulation has not been paid to it by the employer, is sufficient evidence that the amount of interest shown on the certificate is unpaid and is due to the Crown.
(6) Any document purporting to be a certificate under paragraph (5) is deemed to be such a certificate until the contrary is proved.
(7) HMRC may prepare a certificate certifying the total amount of interest payable in respect of the whole of a combined amount without specifying to what component of the combined amount the interest relates and paragraphs (5) and (6) will apply to that certificate.
(8) Where an employer has paid interest on an amount under this regulation and it is found not to have been due to be paid, although the amount in respect of which it was paid was due to be paid, that interest must be repaid to the employer.