How can I tell if a few clients make up most of a call centre’s call volume?

Request two reports and compare them: calls handled by client, and revenue billed by client. They can tell different stories. A client might generate heavy call volume but pay a low rate, or a small-volume client might pay well for specialized work. Both views matter when you judge dependence.

Look at the trend as well as the snapshot. Is the largest client growing, steady or shrinking as a share of the work? Ask when each major contract was signed, when it ends, how it renews and what notice either side must give. A client on a short rolling arrangement is a different risk from one with a long term.

Learn how the centre is set up around them. Dedicated teams, special scripts, custom reporting and client-specific software all show how entwined the relationship is. They also show how hard it would be for that client to leave, or for you to replace the work. Ask whether the seller will arrange a conversation with the main clients before closing. A client who confirms their plans is more reassuring than any report. Your accountant can help you test what the loss of the biggest client would do to cash flow.

Key takeaways

• Rank clients by calls and by billings; the two lists can differ.
• Check contract end dates, renewal terms and notice periods for the largest accounts.
• Ask for conversations with major clients before you commit.