Law Firm Invoice Template

Setup takes about 30 minutes. Download the .xlsx file and open it in Excel or Google Sheets. Start with the Client & Matter List sheet — add each active client and their open matters. Enter billing contact details, payment terms, and any billing instructions specific to that client (some corporate clients require e-billing through a third-party platform; note that here so it's visible at invoice time). Then move to the Fee Schedule sheet and enter each timekeeper with their current billing rate. Once those two sheets are populated, creating each invoice takes under 10 minutes.

To create an invoice, go to the Invoice sheet and select the client and matter from the dropdowns. Set the billing period and invoice number (use a consistent format such as INV-2026-0042). In the time entries table, enter each time entry: select the timekeeper from the dropdown (which auto-fills their rate), enter the date, hours, and a clear activity description. Add any flat fee charges in the flat fee section if applicable. Review the trust balance in the Trust Account Ledger and, if the client has funds available to apply, enter the trust payment amount in the totals block. Print or export to PDF.

After sending each invoice, log it in the Invoice Log — enter the invoice date, due date, amount, and set the status to Outstanding. Update to Paid when funds clear, or to Overdue after the due date passes. For trust account activity, record every deposit and disbursement in the Trust Account Ledger immediately — state bar rules in most jurisdictions require trust accounts to be reconciled monthly, and doing it as you go is far simpler than reconstructing transactions at month-end. Firms that treat the Invoice Log as a weekly review item — checking outstanding balances and flagging anything past 30 days — consistently see shorter collection cycles than those who invoice and wait.

Law firms bill differently from almost every other professional services business, and generic invoice templates fail them for a predictable reason: they don't account for matter-based billing. Every legal invoice needs to be tied to a specific matter with its own number — not just a client — because a single client may have five active matters with different billing arrangements, different responsible attorneys, and different billing rates. Invoicing without matter numbers creates confusion for clients, makes AR tracking nearly impossible, and can create compliance issues with state bar billing requirements.

The financial structure of a law firm invoice reflects how legal fees actually get earned. Time entries need a timekeeper identifier (so clients can see whether they're paying partner rates or associate rates for each task), a date, a narrative description, hours, and a billing rate — not just a dollar amount. Flat fee matters need their own section because they aren't billed by the hour but still need a matter reference and clear description. Trust account applications need to be reflected on the invoice face with the correct balance available — because clients receiving a bill that shows trust funds on deposit expect to see those applied before the net amount due is calculated.

Collection is the part of law firm finance that most attorneys underweight until it becomes a problem. The average law firm realization rate — the percentage of invoiced fees that actually gets collected — runs between 85% and 92% for well-managed firms, and significantly lower for firms without structured follow-up processes. The Invoice Log in this template is designed to support that follow-up: it shows outstanding balance by matter and by client, flags invoices that have crossed the due date, and tracks disputed amounts separately. Firms that review their AR weekly and follow up within five days of a missed due date consistently collect more and at faster cycles than those waiting until month-end to notice what's overdue.