This guidance note provides details of quarterly instalment payments (QIPs) for corporation tax purposes and which companies need to pay their tax liabilities in this manner.

Generally, corporation tax is payable nine months and one day after the end of the relevant accounting period. However, large companies are required to pay their corporation tax liability upfront in four quarterly instalments (subject to a few exceptions which are set out below).

The rules in relation to the payment of quarterly instalments and the definition of a large company can be found in Corporation Tax (Instalment Payments) Regulations 1998, SI 1998/3175.

The concept of a 'very large' company also applies for accounting periods beginning on or after 1 April 2019. Very large companies are required to pay QIPs before the accounting period end, which is earlier than the payment schedule for large companies. SI 2017/1072

For guidance on the calculation of the QIPs and potential interest charges, please refer to the Calculating QIPs guidance note.

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