The invoice you are not chasing is the cashflow problem you have not named yet
There is a file on your system right now with a bill on it that has been outstanding for more than sixty days. Probably more than one. You know they are there. Everyone in the practice knows they are there. Nobody has chased them properly because chasing money from clients is uncomfortable, because the fee earner who did the work does not want to damage the relationship, and because the phone call always gets pushed to next week when things are quieter.
Things are never quieter.
Outstanding invoices in law firms accumulate in a way that is unlike most other professional services. The work is done. The relationship is ongoing. The client knows they owe the money and is waiting to see whether you will ask for it directly or let it drift. In many cases they will pay when chased and have simply been waiting for someone to ask. Every week that passes without a chase is a week of cash that is sitting in their account rather than yours.
The numbers across the profession are consistent and uncomfortable. Average debtor days at small to mid-size UK law firms sit between 60 and 90 days. The target in a well-run practice is 30. The gap between those two numbers represents a cashflow deficit that most firms fund silently through partner drawings, delayed investment, or credit facilities they would prefer not to use.
The cause is rarely bad clients. Most outstanding invoices are outstanding because nobody got around to asking for them in a way that made payment feel expected rather than optional. A single invoice sent by email with no follow-up is an invoice that a busy client can deprioritise indefinitely without feeling that they have done anything wrong.
Manual invoice chasing compounds the problem in two specific ways. The first is inconsistency. Which invoices get chased and when depends entirely on who remembers to do it and how much time they have that week. Some clients receive a call within two weeks of the invoice date. Others drift to ninety days because nobody happened to pick up the file. The inconsistency is invisible in the day-to-day but shows up clearly in the aged debt report.
The second is relationship anxiety. Fee earners who built the client relationship are reluctant to chase firmly because they are worried about the next instruction. The result is a chase that is too gentle to prompt payment and just assertive enough to create awkwardness. The worst of both outcomes.
Automated billing sequences remove both problems. The invoice goes out. Three days later, if it has not been paid, a polite acknowledgement goes out confirming receipt and providing payment details. At fourteen days, a reminder. At thirty days, a firmer message that references the terms and asks for a payment date. At sixty days, the matter flags for direct partner or fee earner intervention.
Every client receives the same sequence regardless of who handled their matter or how busy the practice is that week. The sequence is professional, consistent, and removes the personal awkwardness from the early stages of the chase. By the time a fee earner needs to get involved personally, the automated process has already established that payment is expected, the terms have been referenced, and the client has had multiple opportunities to respond.
The practice that implements this does not collect more money than it is owed. It collects the same money faster. The distinction matters because faster collection means lower debtor days, better cashflow, less reliance on credit, and the ability to invest in the practice without waiting for WIP to convert.
A reduction from 75 debtor days to 45 across a practice billing £1.2 million a year releases roughly £100,000 of cash that was previously tied up in outstanding invoices. That number scales with billing volume. It does not require new clients, higher fees, or more work. It requires a consistent approach to asking for money that is already owed.
The invoice is sitting there. The client is waiting to be asked. The only thing missing is a system that asks on schedule without anyone having to decide whether today is the right day to make an uncomfortable call.
