IR35 Calculator
Why you should consider an IR35 Contract Review
If you’re looking for an IR35 calculator to work out your potential take-home pay or tax position, you’re not alone. Many contractors turn to these tools hoping for a quick answer. But while IR35 calculators might give you a rough estimate of your tax liabilities, they can’t tell you what really matters – whether your contract is inside or outside IR35.
Before you crunch the numbers, check the IR35 status
Before calculating how much worse off you might be inside IR35, ask yourself the more important question – should your contract even be classed as inside IR35 in the first place? If you think not, we can help.
Determining your IR35 status requires a detailed assessment of your contract terms and your actual working practices, measured against established employment status case law. No automated IR35 calculator or tool can produce an outcome you can 100% rely on.
Get expert IR35 help that counts
At Bauer & Cottrell, we’ve been helping contractors, engagers, and agencies get IR35 right for over 20 years. Our IR35 contract review service gives you a clear, reliable opinion on your status, including:
- A full review of your written contract
- Assessment of your working practices
- Clear advice on risk areas and what to do next
- A written report for your records
We can also help contractors who wish to appeal their client’s inside IR35 determinations under the Off-Payroll Working rules.
Don’t base your IR35 position on guesswork. If you’re unsure about your status, or just want peace of mind – get in touch with our IR35 experts today or explore our IR35 contract review services.
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Single IR35 Reviews
Want to check your IR35 status? We provide a comprehensive review of your written contract and working practices, concluding with a written IR35 opinion.

Contractor Guardian
Might need more than one review within 12 months? Check out our yearly Contractor Guardian IR35 subscription which covers unlimited reviews and additional benefits.

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Determinations
Do you need assistance with IR35 assessments for your contractors? Discover our comprehensive IR35 determination services.

A quick guide for all, where we break down the basics of IR35 & the Off-Payroll Working rules, including what decides status and who is responsible.

Explore IR35 case law decisions and how they shape status determinations – essential insights for contractors, clients, and agencies.

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