The deadlines for quarterly Corporation Tax payments in the UK apply to large companies with taxable profits over £1.5 million, following the Quarterly Instalment Payments (QIPs) system. Under this system, businesses must pay Corporation Tax in four equal instalments throughout the accounting year, rather than a single payment after year-end. The deadlines for companies with a 12-mont... https://xactaccountants.co.uk/corporation-tax/