Marketplace > Professional services > NumberMill

About us

NumberMill is a ACCA practice for small businesses, specialising in Limited Company contractors. We also offer a wide range of services to support all types of contractors such as FCSA Accredited umbrella.

We truly have the qualifications, systems, skills and expertise, to offer you efficient, value for money and compliant services.

Our experts are also able to offer you the best, honest and transparent advice in a constantly changing legislative market. In this respect, we are leaps ahead of a high street accountant who are unlikely to have industry knowledge.


Umbrella PAYE

NumberMill, your go to umbrella company. Here, we make sure that you are paid on time and leaving you with a peace of mind, knowing all Tax and NI are deducted correctly and paid across to HMRC without any additional administration of having a limited company.

Umbrella gives you the ability to work on multiple assignments with different agencies and still retain your employment and one single tax code.

FCSA Accreditation is often an end hirer or agency requirement as it demonstrates the highest levels of compliance in the sector.

NumberMill is one of the few FCSA Accredited umbrella companies who have the capability to process fixed expenses.

  • Umbrella FIXED EXPENSES available to those contractors that meet the requirements, subject to HMRC guidelines
  • No lock in or exit fees
  • Text message updates on your pay
  • Competitive margin and price matching – only payable when you work
  • All relevant insurances are covered
  • State of the art online portal for payslips, messages and legitimate business expenses


Umbrella PAYE Explained in UNDER 2 minutes!




Accountancy and Consultancy

NumberMill is also a firm of ACCA and IPSE-IR35 qualified accountants who specialise in accountancy services for contractors and small businesses. Services provided include but not limited to:

  • Bookkeeping
  • VAT Returns
  • Personal tax returns
  • Payroll
  • Management Accounts
  • Credit control
  • Statutory Financial Accounts and Corporation Tax Return (CT600)
  • IR35 Reviews and much more


IR35 Assessment

We can assess your working practices and produce a Status Determination Statement (SDS) with a written opinion as to whether you are Inside or Outside IR35. We can support you in defending your IR35 status to end clients, agencies and HMRC as well. Our legal partners are specialist in this area!


Flex & Protect

NumberMill are able to support contractors with a flexible approach. Our new solution Flex and Protect will allow contractors to switch easily from captured to non captured assignments. This will enable contractors to work through our compliant FCSA Accredited Umbrella for the period in which the end-hirer implements the necessary changes for IR35, without affecting their Limited Company or impacting their responsibilities as a Company Director.

There are no signup or leaving fees and a management margin is only payable when you work. All PAYE taxes will be deducted at source and includes all necessary insurances.


IR35 PROTECT – “Fee Payer”

NumberMill have developed a service called “PROTECT” which will shield the agency, the contractor, and end hirers from this risk. Additionally, with the introduction of the Criminal Finance Act in September 2017, end hirers and agencies have the responsibility to ensure compliance in the supply chain.

With this, NumberMill become the HMRC recognised “Fee Payer” and will assume full responsibility for the payment of workers, correct deductions of taxes and RTI submissions. Where appropriate, in-depth IR35 status reviews are undertaken and evidenced for HMRC and this will allow gross payment to Ltd Company contractors.

Failing this we can offer the contractor our compliant FCSA accredited umbrella employment service. We base our services on technical understanding of the legislation, partnership with legal employment experts and by offering a wide range of compliant contractor-based services.


Exclusive member offer:

Register online and get first week free or 10% off IR35 assessment.

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Contact details

Telephone: 0333 121 2001

Email: [email protected]


Address: Floor 2, Cassiobury House, 11-19 Station Road, WD17 1AP



Marketplace > Professional services > NumberMill