Migration succeeds or fails at the data migration stage - and the outcome is visible from the very first payslip.
A payroll data migration is not simply a matter of mapping fields from one system to another. It means reconstructing a social history (accumulated leave balances, RTT balances, seniority, accrued entitlements, in-progress events, payments already made) in a form that the new system can correctly interpret, calculate, and report. The slightest error surfaces on the first payslip - and is paid for in adjustment runs, employee complaints, and lost team confidence.
GBA Connect manages your payroll data migration as a project in its own right, with a proven methodology and an enforceable quality standard.
Who this offer is for
- You are running an HRIS/Payroll migration and data migration is a major project risk
- You are managing a merger or acquisition and need to consolidate multiple legacy payrolls
- You are insourcing or outsourcing your payroll and need to recover history from your current provider
- You have experienced a failed migration and need to consolidate the historical record retrospectively
What we deliver
- Migration strategy: scope, depth of history, granularity, alternative scenarios based on constraints
- Migration specifications: source tables, target tables, transformation rules, handling of edge cases
- Migration control plan: integrity checks (volume, completeness, consistency), business checks (balances, accruals, entitlements)
- Migration operations management: oversight of technical workstreams, successive test runs, gap management
- Business validation of migrations: review with payroll managers, sign-off on migration acceptance reports by batch
- Migration file suitable for archiving and audit trail: full traceability of all transformations and residual discrepancies
Client testimonials
"Data migration is the blind spot of every project. Everyone watches the configuration; no one looks seriously at the data until the month before go-live. GBA Connect forced us to address the issue from the start - we discovered discrepancies six months before go-live and had time to resolve them. Without them, we would have found out on the first payslip."
- CHRO, post-acquisition industrial group - engagement delivered by the founding partners prior to the creation of GBA Connect
Success indicators
- Migration acceptance reports signed by batch before go-live
- Balances and accruals migrated to the cent across all employee populations
- First post-migration payroll run with no adjustments attributable to migrated data
- Evidence file archived and available as a defensible record in the event of employee claims or audits
Format & duration
Variable engagement depending on volume and complexity, typically between 3 and 9 months. Fixed fee or time-and-materials, depending on your needs.
This offer is primarily scoped for HRIS/Payroll migration projects, but also addresses merger and acquisition contexts, and payroll insourcing or outsourcing.
To go further
→ Let's talk about your project · See also: HRIS/Payroll/Time & Attendance Business Project Management · ADP Migration Support · Payroll Functional Testing (UAT)