If you had profits between £300,000 and £1.5 million before 1 April 2015, you may be able to claim Marginal Relief to reduce your Corporation Tax.
If your accounting period is shorter than 12 months
The small profits rate and main rate are for a whole year. The thresholds reduce in line with your accounting period. For example, if your accounting period is 6 months, the £300,000 small profits threshold is halved to £150,000.
One company is associated with another if either:
one company controls the other
both companies are controlled by the same companies or people
This means they have a shared tax threshold. For example, if one company owns 3 others, divide the threshold by 4. The small profits threshold is then £75,000 for each company.
If more than one rate applies in your accounting period
Work out how many days each rate applied, then work out the tax due for each.