Corporation Tax Calculator

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Calculate Company's Corporation Tax Liability
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This utility is for information only and does not constitute legal, accounting, tax, investment or other professional advice or services. You should not act upon the calculations without obtaining specific professional or legal advice. No representation or warranty (express or implied) is given as to the accuracy or completeness of the calculations, and, to the extent permitted by law, Comdal Limited, its members, employees and agents do not accept or assume any liability, responsibility or duty of care for any consequences of you or anyone else acting, or refraining to act, in reliance on the information provided by this calculator or for any decision based on it.

Corporation Tax Calculator

Use this Corporation Tax Calculator to work out your Company's CT liability for any accounting period after April 2015. This calculator is a limited version of the full version available if you create a EasyDigitalFiling account. It does however enable the calculation of Capital Allowances, Research & Development*, and the effect of carrying losses forward/back. If you create an account you can view computations and the Legacy CT600 form.

No data you enter here is saved, so if you need to make a HMRC return you can do so by clicking 'Save for later', and creating an account. The dates default to 2019, you can change these in the 'Return Information'.

* If you are claiming R&D and you are due a tax credit, select the supplementary page "payments and repayments" and click box 40 to "yes" to see your tax credit due.

Company's filing obligations

An incorporated Company must make a Corporation Tax(CT600) return along with full IXBRL tagged accounts within 12 months from the end of its accounting period, with any corporation tax amounts due being paid within 9 months and a day. Abridged or filleted accounts must also be filed with Companies House within 9 months of the end of the accounting period.

The Easy Digital Filing platform enables you to file your end of year returns for your Company to both HMRC for Corporation Tax and Companies House. Create an account to get started. You will need a HMRC Gateway Account and/or a Companies House to file through this service.

Find out more on how to file your returns online using Easy Digital Filing

How To file a CT600

How To file a CT600

Step by Step guide for how to make a Corporation CT600 Tax Filing.

How to create Micro IXBRL accounts

Create iXBRL Company Accounts

Templates designed for both small and micro companies.

Extended accounting period how to file a CT600

Extended year Company tax filing

Where your accounting period is greater than 12 months.