See How Much of Your Revenue Sits With One Client — Free
Paste monthly revenue by client and read the share each one holds, with the months your biggest account crossed a third of the total.
The proof surface
Year-end totals hide timing. A client that is a third of the year can be more than half of a bad month, which is the month that decides whether the business is safe.
Why the flat version breaks
Year-end averages
A client at 30% for the year can be 60% in the two months that make or break a quarter, and the average hides exactly those months.
Confusing revenue with margin
The largest client by revenue is often the thinnest by margin, which makes the concentration riskier than the strip alone shows.
Diversifying with more small clients
Adding ten small accounts does not lower concentration if the dominant one keeps growing at the same rate — the share is what moves.
How to work the concentration strip
Client and amount per month, one month per line.
The share that worries you becomes the hot-segment rule on the strip.
Each month is a segment sized by the largest client's share, with hot fill above your own threshold.
Take the two worst months to your accountant and agree a cap on new work for that client.
What the strip replaces
| Question | Before | On the strip |
|---|---|---|
| How concentrated am I | one year-end percentage | share per client per month |
| Which month was risky | recalled from memory | crossing months marked hot |
| What to do next | 'diversify' | a cap on new work for the dominant client |
Months where a client sits above your threshold are marked by fill, not by a warning badge, because the strip's whole job is showing shape over time.
Run it on the samples, right here
FIRST-LOAD
Data note: Everything runs in this browser tab on the concentration strip: your revenue lines by client and month stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Go deeper: the companion app files the same reading as a paper ticker strip
The article demo above runs without limits. The companion app keeps a local history, exports the rows as CSV, prints the ready-to-mail packet, and holds your drafts on this device — one free run, then $ 9 one-time for the layer that keeps filing.
The strip and each month's share are free. The paid layer keeps a year of revenue lines and prints the concentration summary.
Open the client concentration strip companionBoundary
This concentration strip works only on the revenue lines by client and month you paste you paste. It does not audit your accounts, does not advise on selling or diversifying the business, and does not report to your accountant in your place. The figures describe what you supplied, not what is true in the world. Confirm anything you plan to act on with your accountant before making a hiring or borrowing decision before you rely on it.
What this is built on
- Every figure comes from the revenue lines by client and month you paste you paste; nothing is looked up, scraped or asserted as verified.
- Method: share = client amount ÷ month total, with the largest share per month plotted as the segment height
- Sample values are labelled samples — illustrative by design, not your data and not a quotation of any organisation's policy.
Before: the reader knew one client was large. After: they can see that client was 58% of revenue in four of the last six months.