Outsourced payroll administration for UK employers.

info@orinomics.com Monday to Friday, 09:00–17:30 UK time

Payroll administration for UK employers, run to a fixed timetable

Orinomics Limited processes payroll for UK employers using information the employer has approved. We prepare the pay run, produce payslips and payroll reports, support PAYE and Real Time Information submissions, and maintain an auditable record of what was processed, approved and changed.

Every engagement runs under a written service agreement that sets out the payrolls covered, the processing deadlines, the approval points, the outputs and the fee basis before the first pay run.

  • Registered in England and Wales
  • Written service agreement on every engagement
  • Employer approval before any payroll is finalised
  • Full audit trail of inputs, approvals and changes
  • We do not hold payroll funds
  • UK GDPR compliant data handling

Where the line sits

You remain the employer. Orinomics Limited administers the payroll process you instruct us to run. You remain responsible for employment decisions, worker status and tax treatment, contractual pay, approval of each pay run, and funding of net pay, HMRC liabilities and pension contributions. We process, calculate, report and keep the record. We do not decide, and we do not pay.

Setting this out plainly is not a disclaimer exercise. It is how a payroll bureau engagement actually works, and clients who understand it from day one have fewer problems at year end.

See the full process
What we do

Six payroll services

Take managed payroll on its own, or combine it with the supporting services. Each is defined in your service agreement with a stated scope, a processing timetable and a fee.

Managed payroll administration

End-to-end processing of an agreed pay cycle: input validation, gross-to-net calculation, deductions, payroll reports, payslips and the payroll record.

PAYE and RTI administration

Preparation and submission support for Full Payment Submissions and Employer Payment Summaries, using approved payroll data and your PAYE scheme details.

Workplace pensions and statutory pay

Processing of pension contributions and statutory payments through the pay run, with the supporting payroll records and pension provider files.

Payroll migration and onboarding

A controlled move from an existing provider or in-house process: data review, opening balances, parallel run where agreed, and documented sign-off before live processing.

Payroll year-end administration

Final submissions for the tax year, P60 production and distribution, and the new-year setup including updated codes and thresholds.

How we charge

We set this out on the front page because payroll pricing is often deliberately opaque. There are three ways Orinomics Limited earns revenue, and only these three.

2. Fixed monthly fees.


For employers who prefer a predictable figure, a fixed monthly fee covering an agreed pay frequency and an agreed headcount band. Reviewed with you quarterly and adjusted in writing before any change takes effect.

3. Fixed project fees.


For migration, historic correction work or a one-off year-end catch-up — a single fee quoted against a written scope with a defined deliverable.

Whichever applies, the amount is quoted in writing against a defined scope and agreed before processing begins.

Our fee is never a percentage of your payroll value. We take no commission, no share of any deduction, and no payment from any third party — including software vendors, pension providers and payment providers — in connection with your account. Nothing is ever charged to an employee or a worker. The employer is our client and the only party we invoice.

Read the full fee structure

How the pay cycle runs

Six controlled stages, the same every period.

See the full process
  1. #01

    Scope and setup

    payrolls, frequencies, deadlines, approval contacts and required outputs agreed in writing.

  2. #02

    Secure data collection

    you supply authorised payroll inputs through the agreed channel by the cut-off.

  3. #03

    Processing and checks

    we validate inputs for completeness and process the payroll under the agreed rules.

  4. #04

    Employer approval

    you review and approve totals and exceptions before anything is finalised.

  5. #05

    Outputs and submissions

    payslips and reports issued; authorised RTI submissions made where in scope.

  6. #06

    Record keeping

    processing records retained and the audit trail of inputs, approvals and changes maintained.

Who we work with

UK employers who want payroll to be a defined, repeatable process rather than a monthly scramble. Typically:

Get started

Tell us about your payroll

Send us the basics — how many payrolls, how many employees, the pay frequencies, what your current process looks like and what is going wrong with it. We will come back with a written scope and a quote.

Request a payroll quote

Scoping is free and carries no obligation. We confirm that a payroll is within our scope before accepting any engagement.

  • Email: info@orinomics.com
  • We respond within one working day, Monday to Friday, 09:00–17:30 UK time.