A selected three-client snapshot
USD 40,000, USD 25,000 and USD 10,000 against USD 100,000 portfolio subtotal give 40%, 25% and 10%; combined share 75% and unlisted remainder USD 25,000.
Billing review
Free Client Billing Concentration Calculator
Describe a billing mix snapshot using a complete, explicitly defined denominator. The three entered clients are a selected sample and need not be the three largest clients.
What you can do here
Calculate three entered clients' shares of one defined portfolio billing subtotal and reconcile the unlisted remainder on a consistent period and currency basis.
Built for real invoice workflows
Retain the population definition and source records when comparing billing mix over time.
Preparing your calculator with today’s date…
Calculation notes
How the result is calculated
Each share = entered client billing subtotal ÷ complete reviewed portfolio subtotal × 100. Combined share uses the sum of all three amounts; unlisted remainder = portfolio minus that sum. Display percentages to two decimals. Use distinct clients, one period, one currency and the same before-tax billing basis. This non-negative model excludes negative net-client balances. No top-three ranking, benchmark, risk rating, cash, profitability or revenue recognition is inferred.
Formulas and examples reviewed October 2, 2026. Illustrative figures; no tax or contractual determination.
Same amount, different population
USD 40,000 is 40% of a USD 100,000 portfolio and 50% of USD 80,000. Investigate a denominator change before interpreting the change in share.
Questions about this calculation
Are the entered clients automatically the biggest three?
No. Establish a full ranking separately if that is the question. This tool reports only the chosen entries.
What if credits give a negative client subtotal?
That case is outside this non-negative model. Define and reconcile the reviewed population without silently discarding credits.
How to use it
1
Enter the complete portfolio billing subtotal for one defined period and currency.
2
Enter up to three distinct client subtotals on the same basis.
3
Review shares, combined amount and unlisted remainder without assigning a risk rating.
Why it helps
Make the denominator and sample boundaries visible.
Reconcile entered client amounts with the complete portfolio.
Avoid treating billing shares as profit or confirmed receipts.
Next step
From free tool to live invoice workflow.
Use the result when creating your invoice in InvoiceAgent. Planner setup links carry the settings they describe into a draft. Review your dates, amounts, PDF, and reminder settings before scheduling.
Related workflows
Move from the quick answer into the rest of the invoice system.
Document the population
Document the population
Retain client grouping and exclusion references.
Interpret a defined snapshot
Interpret a defined snapshot
Check amounts and denominator changes before acting.
Invoice templates
Invoice templates
Use the result inside invoice formats that are ready for clients and easier to automate.
Knowledge base
Knowledge base
Review the billing concepts behind the numbers before they go onto a live invoice.
Profession pages
Profession pages
See how freelancers, consultants, and agencies apply the same calculator output in different workflows.