Payroll System Migration Services
Move your payroll data to a new system without missing a pay run,
disrupting HMRC submissions, or losing year-to-date accuracy.
Unveiling Safer Payroll System Migration Across the UK
pHRism has migrated payroll data for UK businesses for over 10 years, from our headquarters in London and our office in Camberley.
Migrating Statutory And Tax Data Without Errors
Tax codes, NI numbers and pension contribution records are the parts of a payroll migration where mistakes actually cost money and trigger HMRC queries. pHRism audits every statutory data field before it moves, so errors are caught before migration, not after your first live pay run.
Use Cases
- Tax codes, NI numbers and pension data audited before migration
- Statutory deduction rules mapped and verified in the new system
- Data cleansed to prevent errors carrying over from the old system
30-minute call | No obligation | Clear next steps
Protecting Year-To-Date Figures Through The Move
Migrating mid-tax-year is normal, but getting year-to-date figures wrong is not. pHRism carries forward accurate YTD gross pay, tax and deductions whatever point in the tax year you move, so P60s and end-of-year reporting stay correct.
Use Cases
- Year-to-date figures transferred accurately, at any point in the tax year
- Historical pay data preserved for accurate P60s and year-end reporting
- Employee payslip history retained and accessible after go-live
30-minute call | No obligation | Clear next steps
Keeping HMRC Submissions Running Without A Gap
A missed or duplicated Real Time Information submission is one of the most visible ways a payroll migration can go wrong. pHRism verifies PAYE scheme details and tests RTI submission continuity during the parallel run, so HMRC reporting never stops.
Use Cases
- Real Time Information submissions continue without gaps or duplicates
- HMRC reference numbers and PAYE scheme details verified before cutover
- Submission continuity tested during the parallel run, not assumed
30-minute call | No obligation | Clear next steps
Timing The Move Around Your Pay Run, Never Mid-Cycle
A payroll migration scheduled without regard for pay run dates is how people end up paid late. pHRism sequences every migration around your actual pay calendar, with a rollback plan ready before cutover, so employees are paid on time throughout.
Use Cases
- Migration scheduled around pay run dates, never mid-cycle
- Rollback plan in place before cutover is confirmed
- Employees paid on time throughout the transition
30-minute call | No obligation | Clear next steps
Unlock the Full Potential of Your Current HR Solutions
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Fully Integrated HR-Payroll Workflow that Exceeded Business KPIs
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View Case StudyOur Process
A structured migration process that moves your payroll data safely, from first data audit through to post-cutover support.
Understanding What Is Moving, And Its Condition
We audit your current payroll data, including tax codes, NI numbers, pension records and year-to-date figures, identifying quality issues and mapping every field to its destination before any migration work begins.
- Full payroll and statutory data audit
- Tax, NI and pension data quality checked
- Field-level mapping between old and new systems
30-minute call | No obligation | Clear next steps
Building A Plan That Protects Your Pay Runs
We sequence the migration around your pay run dates and RTI submission deadlines, with a documented rollback plan in place before cutover is scheduled.
- Migration sequenced around pay run and RTI deadlines
- Rollback plan documented and agreed
- Stakeholders briefed on timeline and impact
30-minute call | Clear next steps
Proving It Works Before It Counts
Before any live cutover, we run a trial migration in parallel with your existing system and validate tax codes, NI records and year-to-date figures against source data, so issues surface while there is still time to fix them safely.
- Parallel trial migration, not a live cutover
- Tax, NI and YTD data validated against source
- Discrepancies resolved before go-live is scheduled
Structured delivery | Dedicated project lead
The Switch, Made Deliberately
With the trial validated, we execute the live cutover on the agreed date, timed around your pay run calendar. The rollback plan from step two stays ready throughout, so go-live carries as little risk as a well-rehearsed migration can.- Live cutover executed on the agreed date
- Rollback plan ready and unused, by design
- First live pay run monitored closely
30-minute call | Clear next steps
Support When You Need It Most
The first few pay runs and RTI submissions after cutover are when issues are most likely to surface. pHRism stays closely involved to resolve anything that slips through, so payroll continuity is never left unsupported.- Dedicated support through the first live pay runs
- RTI submissions monitored through the transition
- Handover to ongoing support once stable
Available as an ongoing service
Client Reviews & Testimonials
We have worked with 200+ clients in the past 10+ years of our existence. You can have a look at some of our client reviews
pHRism have supported us for over 10 years and always provided an exceptional service. Muneer & team are incredibly hard working, highly skilled and knowledgeable. Can't recommend them highly enough.
Matthew Green
Head of IT, CVC
Lead the project through each of the various deployment stages with clarity, collaboration and great pace.
Louise Moore
Head Of Technology & Operations
Phenomenal customer service! Bespoke reporting requests were always very well-done.
Jonathan Hubble
Head of Human Resources, CVC
pHRism have always delivered with a high level of professionalism coupled with outstanding technical ability.
Gavin Thomas
IT Manager, Apax Partners
pHRism have supported us for over 10 years and always provided an exceptional service. Muneer & team are incredibly hard working, highly skilled and knowledgeable. Can't recommend them highly enough.
Matthew Green
Head of IT, CVC
Lead the project through each of the various deployment stages with clarity, collaboration and great pace.
Louise Moore
Head Of Technology & Operations
Phenomenal customer service! Bespoke reporting requests were always very well-done.
Jonathan Hubble
Head of Human Resources, CVC
PHRism have always delivered with a high level of professionalism coupled with outstanding technical ability.
Gavin Thomas
IT Manager, Apax Partners
Frequently Asked Questions
About payroll system migration with pHRism
Planning a payroll system migration?
Get a free consultation with pHRism's payroll migration specialists. We will help you get clarity on data readiness, timing and next steps.
This is what will happen, after you submit the form
Fill the form below or book a call with us directly via calendar.
- We can sign NDA for confidentiality
- Discuss your project details
- Our consultants contact you within 24 hours
- Submit a comprehensive project proposal with estimates, timelines, team composition, etc
