“(3) If the sub-contractor is a company— ( a ) a sum deducted under section 61 and paid to the Board is to be treated, in accordance with regulations, as paid on account of any relevant liabilities of the sub-contractor [here UPR]; ( b ) regulations must provide for the sum to be applied in discharging relevant liabilities of the year of assessment in which the deduction is made; ( c ) if the amount is more than sufficient to discharge the sub-contractor's relevant liabilities, the excess may be treated, in accordance with the regulations, as being corporation tax paid in respect of the sub-contractor's relevant profits; and ( d ) regulations must provide for the repayment to the sub-contractor of any amount not required for the purposes mentioned in paragraphs ( b ) and ( c ).”
“HMRC aims to improve its service for customers who request a CIS repayment. They will process CIS repayment claims received in writing within 25 working days from the date of receipt where the claim matches the information HMRC holds. Where there is a mismatch, HMRC will need to take up the discrepancy with you or the company’s agent. The speed at which HMRC can process the full repayment will, in part, depend on how soon you or your agent responds. In these circumstances, HMRC will aim to make a part repayment of the amount they can agree and will do so in the above timeframe.”