IR35 Tax Calculator

ContractorUK has provided you with an IR35 tax calculator in order for you to calculate how IR35 can affect your income. IR35 affects contractors who do not meet the Inland Revenue's definition of 'self-employment'. Those who fall inside the IR35 rules will be liable to increased taxation and NI and will prevent their contractor company from retaining profits to grow their business in the future. For more on IR35 please click here.


  Inside IR35 Outside IR35
Total Income
Income Tax
Employees National Insurance
Employers National Insurance
Total National Insurance
Corporation Tax
Total Tax
Average Tax
Net Income After Tax