Corporation Tax Calculator

Calculate Your Corporation Tax in 2 Easy Steps

Use our Corporation Tax calculator to work out your company's CT liability for any accounting period after April 2015 and get a detailed tax breakdown, accurate to the penny for filing Corporation Tax to HMRC.

1. First, click on Return Information in the Return Sections Menu below to enter the dates for your company's Accounting Period. (If left blank the Accounting Period will default to a full year in ).
2. Next, click on Tax Calculator and enter your figures into the appropriate boxes to calculate Corporation Tax from 2015/16 to the current year ().

You can also add reliefs and allowances to your calculations such as marginal relief for Corporation Tax, Research and Development* Tax credits, and Capital Allowances.

*If you want to calculate R&D Tax credits or Company profits tax reduction, click on Return Information in the Return Sections Menu and toggle box 40 to YES to add tax reliefs.

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Download & Save your calculation

Click the download button to register and save your CT calculation for later. Used by hundreds of people every day, our software is free to use, you only pay if you want to file taxes directly to HMRC from within the platform.

Try the full platform

The Tax Calculation menu shown is only a sample section from our user friendly CT600 software, designed to save your company time and money by offering a one stop solution for filing your taxes online.

In addition to calculating Capital Allowances, Research & Development, and the effect of carrying losses forward/back, creating an account with Easy Digital Filing allows you to save your tax calculation, view IXBRL computations, Legacy CT600 form, and more.

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Paying Corporation Tax online

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.

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.