Corporate interest restriction: what large and growing businesses need to know

What is the Corporate Interest Restriction (CIR)?
The corporate interest restriction (CIR) rules are a key part of the UK’s corporate tax regime. They mostly affect large multinational groups with significant levels of debt.

What’s the purpose of the CIR rules?
The CIR rules are designed to stop multinational groups from claiming excessive interest deductions, which could reduce their UK tax liability unfairly. In simple terms, the rules cap the amount of interest expense a company or group can deduct from its taxable profits.