Worksome tools & calculators

Contractor calculators:
free IR35 and workforce cost tools

Worksome's free contractor calculators answer the three questions UK hirers ask most: does IR35 apply to my company, what does a contractor take home inside vs outside IR35, and what does our external workforce really cost? No sign-up, results in under a minute, updated for 2026/27.

Calculators for hiring contractors

Check IR35, compare take-home pay and estimate what your external workforce costs.

  1. 2026/27 tax rates

    IR35 take-home calculator

    Compare take-home pay inside IR35 (umbrella or PAYE) and outside IR35 (your limited company) for any day rate.

    Use the IR35 calculator
  2. 3 inputs · under a minute

    IR35 status checker

    Does IR35 apply to your company? Check turnover, balance sheet and headcount against the small company thresholds (£15m, £7.5m, 50 staff).

    Use the IR35 status checker
  3. GBP or USD · 60 seconds

    Contingent workforce cost calculator

    Estimate what your contractors and agency workers really cost, and where the savings sit: agency markup, market rates, admin time and misclassification risk.

    Use the workforce cost calculator

Compare the calculators

Calculator
The question it answers
You'll need
Time
What does a contractor take home inside vs outside IR35?
Day rate and days worked a year
Under a minute
Does IR35 apply to my company?
Turnover, balance sheet total and employee numbers
Under a minute
What does our external workforce cost, and where can we save?
Annual contractor and agency spend
About 60 seconds
IR35 and contractor cost calculators

Which contractor calculator do I need?

Pick the calculator that matches your question.

1

Does IR35 apply to my company?

Use the IR35 status checker to test your turnover, balance sheet and headcount against the small company exemption.

Check if IR35 applies
2

Inside or outside IR35?

Use the IR35 take-home calculator to compare umbrella, PAYE and limited company pay by day rate for 2026/27.

Compare IR35 take-home pay
3

What do our contractors really cost?

Use the contingent workforce cost calculator to find savings on agency markup, admin time and misclassification risk.

Use the workforce cost calculator

Guides behind the numbers

Blog
IR35 rules explained: what employers need to know
How the off-payroll working rules work and who is responsible.
Blog
How to work with contractors outside IR35
Your obligations as a hirer when contractors work outside IR35.
Guide
Worksome's IR35 guide for hirers
A practical IR35 playbook for UK businesses hiring contractors.
Glossary
What is IR35?
A plain-English definition of the off-payroll working rules.
Blog
What is a contingent workforce?
Contractors, freelancers and agency workers explained.
Solution
IR35 classification with Worksome
Automated IR35 status determinations and SDS in one platform.