If the accounting period is greater than one year (assuming this is a one-off situation for your organisation) please use a ‘pro-rata’ turnover approach that proportionately assesses how much your UK turnover was for 12 months based on the number of months in your accounting period.
For example, if your UK turnover is £1.5m for 15 months, divide £1.5m by 15 months (which is £100,000). Then multiply £100,000 by 12 months, which means your pro-rated turnover is £1.2m.
This would put your turnover into band F, with an annual contribution of £1,000.
If the accounting period is less than one year (again assuming this is a one-off situation for your organisation), please ‘annualise’ by dividing your turnover by the number of relevant months, before then multiplying that by 12 months.
Then use the annualised figure to find the band you fall under.
Using the band annual contribution amount, then work out how much you should pay of that contribution. You can do this by dividing the annual contribution by 12 months, and then multiplying the result by the number of months in your accounting period.
For example, if your UK turnover is £9m for 8 months, divide that figure by 8 (to get £1.125m) and then multiply that figure by 12 months to get your ‘annualised’ income of £13.5m.
£13.5m UK turnover would put you in band E, which is an annual CIISA contribution of £5,000.
Then divide the annual contribution by 12 months, before multiplying again by the number of months in your accounting period (£5,000 divided by 12 = £416.67, which is then multiplied by 8 months. This means your actual contribution would be £3,333).
If it is not a one-off situation for your organisation, please contact financeboard@ciisa.org.uk for further guidance. We will aim to respond within three working days.