The Margin
Switching payroll mid-year without breaking W-2s.
A payroll switch is not just new software setup. It is a handoff between two payroll records, and the receiving company has to know what it is inheriting.
The handoff packet.
Before the next payroll company runs a check, it needs the old payroll story.
1Company and tax accountsEIN, legal name, jurisdictions, deposit schedule, agency IDs, open registrations, and filing history.
2Worker-level year-to-date totalsGross wages, taxable wages, taxes withheld, deductions, benefits, reimbursements, and employer taxes by worker.
3Prior payroll artifactsRegisters, paystubs, tax liability reports, filings, deposit confirmations, amendments, and provider tickets.
4Open issuesVoided checks, corrections, wage-base questions, notices, late facts, employee disputes, and year-end risk.
What can go wrong.
Most switch pain comes from treating carryforward values as clean just because they are in an export.
RiskWhy it mattersRunbook posture
Wage-base continuityPrior wages affect later tax calculations and year-end forms.Carryforward amounts need source evidence and gaps before import.
Tax deposits and filingsPaid, filed, rejected, and amended are different states.The switch packet should separate liability, settlement, and filing evidence.
Open correctionsA late rate, deduction, or work-location fact can affect the next run.Corrections should be derived from late facts, not hidden edits.
Do not switch from a mystery record.
Start with the records you have and identify what is missing before payday.
Explore switch path