Founders ask Collective 54 this 5 times in our records, 4 of them in 2026. The predictable revenue answer on this site covers how to improve it; this page covers how to measure it.
The fee quality chapter of the 2020 book starts from a correction. Most boutiques think all revenue is good revenue, and it is not. Some fees are worth more than others: a buyer will pay more for revenue from recurring services than for revenue that has to be won again from scratch. The same point runs through the exit material. Price is durable EBITDA times a multiple, and the multiple is a reward for confidence that the EBITDA is real, durable and transferable. Revenue quality is the revenue side of that confidence.
The useful thing about the published tests is that none of them requires a judgment call. Each can be computed from records you already have.
Origin of fees. The chapter says boutiques that depend heavily on new clients have poor fee quality, because that revenue is expensive and unstable, and so do boutiques that depend heavily on existing clients, because boutique work is temporary and clients eventually stop paying the rent. Its rule of thumb is about 60 percent of fees from existing clients and 40 percent from new. Compute it by tagging each dollar billed in the period by whether the client had billed before the period began. The business development chapter uses a different figure, about 80 percent from existing clients; the two have not been reconciled, and both say most revenue should come from clients you already have.
Length of contracts. Buyers want long contracts, and the test is whether the average client contract runs longer than twelve months. The chapter contrasts a firm doing thirty-day assessments with one doing assessment, solution development and implementation under a twelve-month contract. Compute the average contracted term of active engagements, weighted by value.
Predictability. A firm whose services build on one another is attractive; the example is an estate planning attorney whose next fee is almost certain because plans need updating when life changes. The screening questions ask whether projects build on one another and whether the service pulls through upsell and cross-sell. As an inference, the measurable version is the share of new engagements in a year that followed directly from a previous engagement with the same client.
Collections. Boutiques with aging receivables have poor fee quality; boutiques paid up front have high fee quality, rarely need cash infusions and can fund growth from free cash flow. The screening questions ask whether you collect the fee in advance of performing the work, whether you can fund growth from free cash flow and whether you can pay the bills without debt. Compute the share of billings collected in advance and the age of what is outstanding.
Concentration. The client relationships chapter describes firms with attractive financial statements that are a house of cards because a few clients produce most of the revenue, and it sets the rule: no single client above 10 percent of billings. Compute the share of the largest client and of the top five.
Tenure. The same chapter sets average client tenure at three years or more as the rule of thumb. It also tells the SBI story that shows why you should know your own data before a buyer interprets it: relationships looked short because the sales leaders SBI served changed jobs every eighteen months or so, but the data showed they hired SBI again at their new companies, which turned an apparent weakness into proof that the relationships were an asset.
Client quality. Revenue from start-ups, which fail often, discourages buyers; revenue from large, stable enterprises encourages them. The chapter adds the health of the end market: a firm serving weak private equity firms will see billings dry up when those firms stop raising capital and buying companies. Compute the mix of revenue by client type and note which end markets it depends on.
The exit essay explains why these measures matter more in some firms than others. In labor-based firms revenue is tied tightly to people, clients are loyal to individuals, and profit depends on specific people showing up every day. As an inference, that suggests one more measure the book does not list explicitly: the share of revenue from relationships held personally by the founder or one partner. Revenue that would leave with one person is lower quality however long the contract, because the exit essay says clients in labor-based firms hired people rather than a firm.
The growth chapter adds the relative view. Growth is judged against competitors in your niche, not your own history, and many boutiques have strong top-line growth with no profit growth, which the book calls a deal killer. As an inference, a revenue quality scorecard should sit next to margin, because high-quality revenue delivered at a thin margin is still a weak asset.
As an inference from the material, put the measures on one page and compute them the same way every quarter from billing and client records: origin mix, weighted contract length, follow-on share, share collected in advance and receivable aging, largest client and top five share, average tenure, client mix, and founder-held share. Track the trend rather than the level, because a single quarter says little. The finance role in the new book is described as protecting financial health and decision quality through forecasting, reporting, unit economics and cash discipline, and this is exactly the kind of reporting AI can produce continuously from the records rather than a founder assembling it once a year.
The 2020 book includes a ten-question version of the same test and scores it simply: yes to eight or more and you have high fee quality that buyers find attractive; no to eight or more and it will be difficult to sell the firm.
Collective 54 publishes no single revenue quality index, no weighting of the measures, and no benchmarks beyond the rules of thumb above. The published positions are the fee quality tests, the concentration and tenure rules, client quality and end-market health, and durability as what buyers price.
If the firm is young, most of these measures will look poor for reasons that are not failures, and the book says a boutique under five years old will struggle to sell in any case; measure anyway, because the trend is what matters.
If the firm deliberately serves one anchor client, concentration is a known risk rather than a finding, and the useful measures become tenure, contract length and the health of that client.
And if you are moving from projects to subscriptions or retainers, expect origin mix and contract length to change first and collections to follow; judge the transition by those.
Revenue quality is how far the revenue you report can be relied on, and the 2020 book measures it with tests you can compute from billing and client records: about 60 percent of fees from existing clients and 40 percent from new, average contracts longer than twelve months, engagements that build on one another, fees collected in advance rather than aging receivables, no client above 10 percent of billings, average tenure of three years or more, and reliable clients in healthy end markets. Add, as an inference, the share of revenue held personally by the founder or one partner, because the exit material says that revenue may not transfer. Put the measures on one page, compute them the same way every quarter, and watch the trend next to margin. What they measure is durability, the property buyers price. Collective 54 publishes no single index or weighting.
The 2020 book defines it through tests of how reliable and valuable revenue is: the balance of fees from existing and new clients, the length of contracts, whether services build on one another, and whether fees are collected in advance. Its point is that all revenue is not good revenue, and that buyers pay more for recurring, predictable fees than for revenue that has to be won again.
The fee quality chapter of the 2020 book uses a rule of thumb of about 60 percent from existing clients and 40 percent from new, because heavy dependence on either is unstable. Its business development chapter uses about 80 percent from existing clients. The two figures have not been reconciled in the published material, but both put existing clients ahead of new ones.
The 2020 book sets the rule that no single client should be more than 10 percent of billings, and it describes firms with attractive financial statements that are a house of cards because a few clients produce most of the revenue. It also sets average client tenure at three years or more, and it recommends knowing your relationship data before a buyer interprets it.
As an inference from the published tests, build a one-page scorecard computed the same way each quarter from billing and client records: origin mix, weighted contract length, share of engagements that followed a previous one, share collected in advance and receivable aging, largest client and top five share, average tenure, client mix, and the share held personally by the founder. Watch the trend, and read it next to margin.
Sources: Greg Alexander, The Boutique: How to Start, Scale, and Sell a Professional Services Firm (Advantage, 2020), chapter 32 for all revenue not being good revenue, recurring fees being worth more, the problems of over-dependence on new and on existing clients, the 60 and 40 rule of thumb, contracts longer than twelve months, predictability when services build on one another and the estate planning example, collections and aging receivables, funding growth from free cash flow, and the ten screening questions; chapter 31 for revenue concentration and the 10 percent limit, average tenure of three years or more, the SBI tenure data, client quality, and healthy end clients; chapter 30 for relative growth and top-line growth without profit growth as a deal killer, and for firms under five years old being hard to sell; chapter 18 for about 80 percent of revenue from existing clients. Greg Alexander, Why Some Boutique Firms Exit Cleanly and Others Never Really Do (Collective 54), for price as durable EBITDA times a multiple, and for revenue tied to people and client loyalty to individuals in labor-based firms. Greg Alexander, The AI-Native Boutique Firm (Advantage Books, January 2027), Closing, for the multiple as a reward for confidence that EBITDA is real, durable and transferable, and the role glossary for the finance role. Related Collective 54 answers on this site: how do I generate more predictable revenue; what can I do to make my business more attractive and valuable to a buyer; what margin should I be targeting. Note on scope: the computation of each measure, the follow-on share as the measurable form of predictability, the founder-held share, the quarterly one-page scorecard and reading it next to margin are inferences used here to organize the source material rather than published Collective 54 positions. The 80 percent and 60 and 40 figures appear in different chapters and have not been reconciled.
Collective 54 is the private community for founders and executives of boutique professional services firms between $5M and $50M in revenue. Members work these answers against their own numbers.