Law Firm Financial System Migration Checklist

Overview

A law firm financial system migration checklist should define the balances, transactions, reports, owners, and evidence required before the new environment becomes authoritative. A successful import is not the same as a reconciled financial migration.

MATTEROOM source materials define a migration blueprint with discovery, mapping, trial conversion, reconciliation, UAT, cutover, and stabilization. The same materials provide mandatory reconciliation controls for legal financial data.

1. Governance and Scope

Name the executive sponsor, project manager, finance lead, billing lead, IT lead, vendor migration owner, and security reviewer. Identify who has final financial sign-off authority. Agree the intended go-live period around month-end and year-end blackout periods.

The project should also define what is in scope and what will remain in a historical archive.

2. Source System Inventory

Document every source containing relevant financial or operational data.

Inventory practice management, billing, accounting, trust, banking interfaces, expense and payment systems, DMS, CRM, and reporting tools. Include custom integrations and spreadsheets used during close or reconciliation so that informal processes are not overlooked.

The goal is to prevent a critical dataset from being discovered late in the project.

3. Client and Matter Data

Compare client and matter counts and validate status, matter type, responsible professionals, office, entity, and currency. Confirm billing arrangements, rates, tax attributes, and custom fields before relying on those records to classify financial transactions.

Client and matter data creates the structure that financial transactions depend on.

4. Time and Expense Data

Reconcile time by period, matter, and timekeeper, keeping billable and nonbillable classifications distinguishable. Compare expense totals and disbursements, and validate narratives, rates, required task or activity codes, and historical status.

The MATTEROOM migration controls specifically call for time and expense totals by period, matter, and timekeeper.

5. WIP

Reconcile total WIP and its matter and timekeeper detail. Distinguish fee WIP from cost WIP, and confirm aging, currency, rate, write-down status, and billing eligibility. A matching total is not enough if the underlying allocation differs.

Finance should be able to reconcile the total and drill to matter level.

6. Accounts Receivable

Compare total receivables and client and matter balances. Preserve invoice numbers and dates, original and outstanding amounts, currency, and aging buckets. Include credits, write-offs, and collections so that the opening receivable position can be explained.

MATTEROOM source materials explicitly include A/R, unapplied cash, write offs, and collections in mandatory migration reconciliation.

7. Cash and Unapplied Cash

Compare cash receipt totals and dates with their client, matter, and invoice allocations. Confirm unapplied cash, currency, bank, reversals, and historical audit information. Explain any change in transaction structure before accepting the target balance.

Unapplied cash should not disappear simply because the target system uses a different transaction structure.

8. Trust

Reconcile trust by bank, client, matter, and currency. Compare receipts, transfers, disbursements, and balances together with reconciliation status and exceptions. Have the designated finance owner review the evidence under the firm’s applicable procedures.

Trust should have a dedicated finance owner and signed acceptance.

9. General Ledger

Validate the chart of accounts, trial balance, and opening balances by entity, office, currency, ledger, and reporting dimension. Include journal history, retained balances, tax accounts, and control accounts in the mapping and reconciliation scope.

MATTEROOM source materials specify GL trial balance and opening balances by entity, office, and currency as mandatory reconciliation controls.

10. Billing Rules

Use representative hourly bills, fixed fees, caps, discounts, multiple rates, taxes, and currencies. Test e-billing, prebills, adjustments, write-offs, and invoice approval against the financial model the firm has authorized.

The migrated system must reproduce the firm's current financial logic or an explicitly approved new model.

11. Reporting

Identify mandatory reports before migration.

Identify required trial-balance, revenue, WIP, receivable-aging, trust, and cash-flow reports. Include realization, utilization, invoice detail, missing-time, matter-profitability, and management reports where required. Agree definitions before comparing outputs.

Rebuild and compare them during trial conversion.

12. Trial Conversion

Run at least one controlled trial using representative data.

Record loaded totals and rejected records, then track mapping, reconciliation, report, workflow, and integration differences. Include performance and security findings. Maintain an open-issue record with owners and resolution evidence.

Each issue needs an owner and resolution status.

13. User Acceptance Testing

Test time and expenses through billing and prebill approval through invoicing. Include cash receipts and receivable allocation, trust receipts, transfers, disbursements and reconciliation, journal entries, month-end close, and management reporting using the intended roles.

Use actual roles and realistic sample data.

14. Cutover

The cutover checklist should define:

No financial system should become authoritative until required reconciliation is complete.

15. Finance Sign Off

Obtain explicit acceptance of WIP, receivables, cash, trust, the general ledger, and opening balances. Confirm billing rules and required reports, document reconciliation exceptions, and record the authorized go-live decision.

The signed reconciliation pack becomes part of the migration record.

16. Stabilization

Monitor the first bills and cash receipts, trust transactions, reconciliation, and month-end close. Review reports, integrations, user issues, security issues, and open migration exceptions before handing the environment into routine support.

The source blueprint describes this as stabilization and support handover.

Create a signed financial acceptance record

Agree the acceptance pack before the trial conversion. It should identify the source extract, the financial cutover date, the mapping version, and the reports used to compare source and target results. Compare like-for-like scope and currency; totals from different dates or filters cannot establish that the conversion reconciles.

For an illustrative discrepancy, a target receivable may match the overall source total while being allocated to the wrong matter. That is still a mapping issue. Record the affected identifiers, investigate the cause, repeat the relevant test, and retain evidence of the approved resolution. A total alone is not an acceptance test for linked financial records.

Define how unresolved exceptions affect the go-live decision and who has authority to accept any remaining risk. Confirm historical access, rollback arrangements, and post-cutover support before switching users. A target launch date should not replace the required financial checks.

After release, compare the first billing and collection cycle with the approved opening position. Use the same agreed report definitions so later differences can be investigated without reconstructing the migration assumptions. The MATTEROOM accounting overview is a starting point for the target configuration; migration scope must be confirmed separately.

Related reading and next steps

For the next evaluation step, review How to Migrate WIP, A/R and Trust Balances to a New Legal System and How to Migrate Legal Practice Management Software Without Disrupting the Firm. Compare the relevant MATTEROOM accounting overview with your firm’s documented requirements and confirm the proposed configuration and implementation scope.