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Plain-English guides to UK Corporation Tax and CT600 filing.

2 results for “accounting-period”Clear search
23 February 2026

Company Year End: 31 March vs Other Dates — How It Affects Your CT600

Does your company year end matter for corporation tax? Yes. Here's how 31 March simplifies your CT600 filing, and what happens with other year-end dates.

ct600year-endaccounting-periodcorporation-taxfinancial-year
23 February 2026

Changing Your Company Year End: CT600 & Tax Implications

How changing your accounting reference date affects your CT600 filing. Short periods, HMRC notification, and tax planning opportunities.

ct600year-endaccounting-periodcorporation-tax