The Consulting Business Financial Model: Understanding Your Numbers

The Revenue Illusion

Revenue is the metric most consultants watch most closely. It is also, in isolation, almost meaningless as a measure of business health.

A consultant billing $25k/month with 80% utilization and high business development costs may be generating less real income than one billing $15k/month with low overhead and consistent inbound.

The four numbers that actually determine financial health:

Number 1: Effective Hourly Rate

Total revenue divided by total hours worked (including business development, administration, and delivery). This is your real compensation rate — not your stated hourly rate.

If your stated rate is $150/hour but your effective rate is $62/hour after accounting for all working time, you have a leverage and pricing problem.

Number 2: Client Acquisition Cost

How much does it cost — in time and money — to acquire one new client? Include marketing spend, time spent on sales calls, proposal time, and networking events.

Most consultants have no idea what their CAC is. Building even a rough estimate reveals whether your business development approach is efficient.

Number 3: Client Lifetime Value

Average revenue per client × average number of engagements per client. This tells you how much you can afford to spend to acquire a new client and still generate a healthy return.

A client who stays for 3 years at $3k/month has a LTV of $108k. Understanding this changes how you think about client acquisition investment.

Number 4: Revenue Concentration

What percentage of your revenue comes from your single largest client? If the answer is above 40%, you have a concentration risk that represents a serious business vulnerability.

Diversifying revenue sources — across clients, offer types, and channels — reduces the fragility that comes from over-dependence on any single source.