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About us

Since 1995, we’ve been providing A1 accountancy services to our clients, steered by our watertight values and principles.



With three comprehensive packages and a number of add-ons, we can equip you with everything you need to help you ride the waves of contracting.



Whatever you’re searching for, our scope of industry knowledge and resources can help.


IR35 Review

Our comprehensive IR35 contract review service will clear the waters surrounding IR35.

IR35 is a tricky piece of legislation, and many contractors know this all too well. From April 2021 unless your end client is deemed as ‘small’, the responsibility of determining your status will now fall with the end hirer.

However, many contractors will still seek to get an assessment or review from IR35 specialists, like QDOS. This expert second opinion can be worthwhile if you’re intending on challenging your end client’s decision via the client led disagreement process.

What is on offer?

As a result we’ve chosen to partner with QDOS. As well as providing overall pass/fail opinion they’ll also provide a list of required changes and can even liaise with your agency if required. QDOS has two different services that are either included with your Nixon Williams package or that we can offer for a discounted rate:

IR35 Contract Assessment
Included on Platinum & Professional packages
£45 + VAT if not included on the package
Full IR35 Review
£120 + VAT for Gold or non-trading clients
£75 + VAT for Platinum or Professional clients
– Overall pass/fail opinion
– Concise list of required changes
– Liaison with agency if required
– Overall pass/fail opinion
– Concise list of required changes
– Liaison with agency if required
– Comments on each relevant clause and an IR35 guide for improved understanding
– A full working practices review

What do I need to do?

If you’re an existing client, just speak to your accountant and they’ll be able to advise on the process for either a contract assessment or a full IR35 review taking into account the package you’re on. If you’re not currently a Nixon Williams client, to get in touch with our team, call us on 01253 843185 and we’ll be happy to answer any questions you have.

How is my IR35 status determined?

HMRC’s determining factors can be complex and will vary from contract to contract. Though no two contracts are the same, there are a few deciding factors which are used to establish your assignment’s IR35 status:


The right (and ability) to provide a substitute if you are unable to undertake your duties is important to help distinguish you from an employee.


Providing services through your own limited company means that it’s likely you will have a greater level of control over your working hours and conditions when compared to an employee. HMRC will consider your levels of autonomy and to what extent your end client controls your hours of work, your conditions and the job you undertake.

Mutuality of Obligation

As an employee, your employer would ask you to fulfil certain tasks even if they don’t fall under your remit. For contractors, it’s generally accepted that you will be required to fulfil only what was agreed by your client for a set amount of time – and to move on once the work has been completed.

Find out more about the benefits of our professional package here.

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