WIP Tracking and Time-Based Billing for Law Firms

What WIP Actually Represents

Work in progress is billable time and disbursements incurred on a matter but not yet invoiced to the client. Without visibility into WIP, a firm can be doing substantial unbilled work without realising how much value is sitting uninvoiced — work that's been done but hasn't yet translated into a bill, let alone cash in the bank.

Why High WIP Is a Cash Flow Problem, Not Just an Admin One

Time recorded but not yet invoiced doesn't generate any cash. A firm with high WIP and infrequent billing cycles can look busy and successful on paper while actually experiencing real cash flow pressure, simply because none of that recorded work has been billed or collected yet.

Setting Up Better Billing Cadence

• Monthly billing as the default for matters of any reasonable duration, rather than waiting for completion.
• Aged WIP reporting — flagging time that's been sitting unbilled for longer than expected.
• Clear engagement terms that set client expectations for billing frequency upfront.

Automating the Process

Practice management software with time recording integrated to Xero can automate much of this — flagging aged WIP and generating draft invoices on a regular cycle, rather than relying on someone remembering to review it manually each month.

Why This Matters for Firm Health, Not Just Cash

Regular WIP review also surfaces matters that are running over budget or scope before they become a bigger problem — billing discipline and matter management are connected, not separate concerns.