Free tool
Revenue Leakage Calculator
Most UK SMEs lose revenue in three predictable ways: slow or missed follow-up on enquiries, work that gets done but never invoiced, and clients who leave and aren't replaced. Enter your numbers below to estimate the total.
All default values are labelled as examples. The formulas are shown openly — no hidden benchmarks. No email required.
Your numbers
Estimated annual leakage
Lost leads
Slow or missed follow-up on inbound enquiries
Unbilled time
Work done but never invoiced
Client churn cost
Revenue lost to annual client attrition
Total estimated leakage
£665,000This is an estimate based on the inputs you provided. It does not account for factors specific to your business. Use it as a starting point, not a precise figure.
How this is calculated
The business assessment maps your actual operational risk across five areas — not just revenue leakage.
Take the free business assessmentCommon questions
How accurate is this calculator?
It gives an order-of-magnitude estimate based on the inputs you enter. Every default is labelled as an example — replace them with your own figures for a more realistic result. The formulas are shown openly so you can judge whether the assumptions make sense for your business.
What counts as a "lost lead"?
An enquiry that came in but was not followed up within 24 hours. Research consistently shows that response speed is one of the strongest predictors of conversion rate, but the exact impact varies by industry. Use a percentage you believe reflects your actual follow-up behaviour.
What should I do if the number is large?
Start the free business assessment. It looks at all five operational risk indicators — not just revenue leakage — and gives you a prioritised summary of where to focus.