CRM migrations at law firms fail for the same reasons every time: data gets lost, billing history goes missing, or staff do not know the new system well enough to use it on day one.
The stakes in legal are higher than in most industries. A missing conflict check record could expose the firm to liability. An incomplete trust account ledger could trigger a state bar investigation. Client contact records that do not migrate cleanly mean attorneys showing up to calls without case history.
This checklist covers the complete migration process in twelve steps. Follow it in sequence. Do not skip the pre-migration steps to save time — that is where most migrations go wrong.
Pre-Migration Steps (Steps 1-4)
Step 1: Pre-Migration Audit. Before touching any data, document what you have. Pull a report from your current system showing total contacts, total matters (active and closed), total billing records, and document count. This becomes your baseline for validating the migration was complete. You cannot confirm success without knowing what you started with.
Step 2: Data Export Format Verification. Export a sample dataset — 50 contacts and 10 matters — in every format your current system supports (CSV, JSON, XML). Open each format in your target platform and confirm the field mapping works. Do this before committing to the migration plan. Field mapping problems discovered during a full export cost days; discovered during a test export cost hours.
Step 3: Contact Deduplication. Law firm databases accumulate duplicate contacts fast. A client named 'Robert Johnson' might be in the system as 'Robert Johnson', 'Bob Johnson', 'R. Johnson', and with three different email addresses. Run a deduplication analysis on your export file before importing anything. Tools like Dedupely or Data Ladder handle this efficiently. Aim to reduce duplicate records by at least 15 to 25% — that is a typical rate for firms with more than five years of history.
Step 4: User and Permission Mapping. List every user in your current system and their permission level. Map each to an equivalent role in the new system. Do not assume the permission structures are identical — they rarely are. Confirm with your new vendor exactly which permissions control which features. An attorney who cannot access trust ledgers on day one will lose confidence in the entire migration.
Data Migration Steps (Steps 5-8)
Step 5: Matter and Case Data Mapping. This is the most complex step for legal migrations. Matters have a structure — client, matter number, practice area, responsible attorney, open date, status, associated documents, billing entries, and communications. Map each field in your current system to the corresponding field in the new one. Where fields do not match (they often do not), decide whether to map to the closest equivalent or create a custom field in the new system.
Step 6: Document Migration Planning. Documents are typically the largest data volume in a legal migration and the easiest to get wrong. Your firm has likely accumulated documents in multiple formats across multiple years. Before migrating, decide: which documents must migrate (active matter files, at minimum), which should stay accessible in read-only archive mode, and which can be deleted. Most firms should not migrate every document from every closed matter — storage costs and search noise are real problems.
Step 7: Billing History Transfer. Billing records are non-negotiable. You need invoice history, payment records, write-off history, and time entry data. Run a reconciliation report from your old system showing total invoiced, total collected, and outstanding balances for the past three years. After migration, run the same report in the new system and verify the numbers match within rounding tolerance.
Step 8: Trust Account Records Migration. This step requires extra care. IOLTA trust account records must show every transaction: funds in, funds out, balance by client, and reconciliation history. Export your complete trust ledger and confirm it imports cleanly into the new system. If your new platform uses a different trust accounting module or integration, get written confirmation from the vendor about how historical trust records will be handled.
Go-Live and Post-Migration Steps (Steps 9-12)
Step 9: User Training Before Go-Live. Training is not optional and it cannot happen on go-live day. Schedule training sessions at least one week before cutover. Role-specific training is more effective than firm-wide sessions — intake coordinators need to know intake workflows, not billing; billing staff need to know trust accounting, not conflict checking. Record all training sessions for staff who miss them.
Step 10: Parallel Running Period. Run both systems simultaneously for at least five business days. All new matters should be entered in both systems. All billing entries should go in both. This is painful but catches problems that test migrations miss. The parallel running period is your safety net — use it.
Step 11: Go-Live Validation Checklist. On go-live day, verify these before decommissioning the old system: all active matters are accessible in the new system, conflict check runs against the full database (not just recently migrated contacts), trust account balances match, all users can log in with correct permissions, client portal invites have been sent to active clients, and integration with billing software is confirmed live.
Step 12: 30-Day Post-Migration Review. Schedule a structured review at 30 days. Collect feedback from all user roles. Check data integrity reports — most legal CRMs show data health metrics. Confirm that trust account reconciliation ran correctly for the first month. Identify any matters that were missed in migration (they always exist — find them quickly). Document any workflow changes that emerged during the first month and update your training materials.