Recurring Revenue Model: Moving Professional Service SMEs from Projects

Europe's business base is overwhelmingly small. Eurostat's final 2023 data count around 33.1 million enterprises in the EU, employing 162.2 million people. Of these, 99% were micro or small enterprises with 0 to 49 people employed, and together they generated 35% of business-economy value added. Large enterprises were only 0.2% of the total but generated around half (49%) of value added, and medium-sized enterprises, at 0.8% of the total, generated 16% (Exhibit 1). Scale advantages are real, and small firms must earn their margin through design more than volume.

Services dominate the structure. According to Eurostat, services made up 63% of EU enterprises in 2023 and 49% of value added, compared with industry at 7% of enterprises and 29% of value added (Exhibit 2). Professional, scientific and technical activities alone accounted for 15.6% of EU enterprises in Eurostat's business demography. A very large number of small firms therefore sell expertise by the hour or the project, with little structural reason to price differently, and little pressure to change unless a buyer, a lender or a competitor shifts expectations.

The UK, although outside the EU, shows the same pattern. The Department for Business and Trade estimates 5.7 million private sector businesses at the start of 2025, of which 4.3 million (75%) employed no one aside from the owners, and 819,000 SMEs (14%) operated in professional, scientific and technical activities. SMEs accounted for 60% of private sector employment and 51% of turnover. The typical advisory firm across the continent is an owner-managed business whose income resets each month unless someone sells again.

The implication for the CFO is that the pricing model is a structural lever, not a cosmetic choice. If revenue depends on hours sold, growth requires more hours, and hours are the one input that a founder-led firm cannot easily add. Recurring revenue changes the constraint from selling time to retaining outcomes, which scales through process and people instead of the owner's diary.

The first action is a one-page revenue map. Classify the last twelve months of revenue as project, repeat project, retainer and subscription, and note which revenue arrived without a new sale. Most firms are surprised by how much recurring work already exists in practice but is billed as a series of unrelated projects, each with its own proposal, negotiation and gap.

The comparison with larger firms also explains why clients scrutinise small advisers' fees so closely. When a firm's revenue is a sequence of bills, each invoice is an event the client can contest; when it is a standing service, the client's question moves from whether to pay this invoice to whether the service is working. That change of question is the commercial heart of the transition.

Evidence on how professional firms bill is limited, but the Thomson Reuters Institute's Tax Firm Pricing Report 2025 is a useful reference for advisers in tax, audit and accounting. It found that hourly billing still dominates, accounting for less than half of client arrangements, and that although subscription billing has grown almost four-fold in the past year, it remains significantly underutilised. The page we reviewed does not describe a European sample, so we treat the findings as an indicator for firms of this type and not as a measure of European practice.

The more revealing findings concern confidence. Less than 1-in-5 respondents say they feel certain their pricing reflects the real value they deliver, and less than one-third say their firm regularly benchmarks its rates against competitors. In other words, most firms set prices by habit: last year's rate, adjusted for what the owner thinks the client will tolerate. A retainer built on the same habit inherits the same weakness, so the move to recurring revenue should be a moment to reset the logic of price as well as the format of the invoice.

Subscription adoption is still early, which means firms moving now are creating a position, not following a norm. The risk of moving late is that clients begin to expect predictable monthly fees from advisers because they already receive them from software, telecoms and managed IT providers. The risk of moving badly is a retainer that is simply the old hourly bill divided by twelve, with the same disputes about time and none of the planning benefits that make recurring revenue valuable.

Retainers work when the client's need is recurring, such as compliance cycles, reporting, continuous improvement or access to advice, and when the firm can state clearly what is included. They fail when the scope is open-ended and the monthly fee is a disguised estimate. A simple test applies to every proposed retainer: could the client describe, in one sentence, what they receive each month and how they will know it has been delivered?

The action is to choose three services that clients already buy repeatedly and write each as a monthly product, with a name, an outcome, inclusions, exclusions, response times, a price and a review cycle. Price from value and capacity, not from last year's hours. Then take the first version to a handful of trusted clients before presenting it to the whole book.

Valuation is the commercial reason many owners listen. SaaS Capital, a lender to software companies that also publishes valuation data, reports that its data predict a private SaaS valuation multiple of 4.8x annual recurring revenue for bootstrapped companies and 5.3x for equity-backed companies, against a public median of 7.0 times current run-rate annualised revenue at the start of 2025 (Exhibit 3). These are software multiples, and a professional-services SME should not expect to be valued like software. They show how the market prices contracted, recurring revenue.

The contrast with typical small-business sales is stark, even allowing for different bases. BizBuySell reports that US small businesses sold in 2025 at an average cash flow multiple of 2.61x, and GF Data reports that private equity buyers paid an average of 7.2x EBITDA in the first half of 2025 for larger lower-middle-market companies. We would not compare these figures line by line, because the metrics, sizes and sectors differ. We cite them to show the range in which an owner-managed service firm sits and how far a better revenue profile might move it.

Vendor evidence on growth points the same way. Zuora's 2025 Subscription Economy Index reports that companies in its index grew revenue 11% faster than the S&P 500 over the last two years. That is a vendor-compiled index of subscription businesses, so selection effects are likely and the result should not be generalised to consultancies. Taken with investor behaviour, however, it explains why recurring revenue has become a standard line in diligence requests.

What buyers pay for is not the word retainer. They pay for revenue that is contracted, renews with high probability, is priced above the cost of delivery and does not depend on one individual. A rolling monthly fee that clients can cancel at will is better than a one-off project, but it is not equivalent to a multi-year agreement with price escalators and low churn. The terms of the contract matter as much as the rhythm of the invoice.

The CFO should therefore measure recurring revenue as a buyer would: monthly recurring revenue, net revenue retention, client churn, contract length and share of revenue under contract. If the firm does not report these today, start now. Twelve months of clean history is worth more in a sale process than a forecast, and it also shows the board whether the migration is working.

A related point concerns who the buyer is. Trade buyers value recurring revenue for the client base and the certainty it gives to integration, while financial buyers value it for its effect on debt capacity and for the visible growth path. Either way, a firm that cannot show retention data forces the buyer to assume the worst, and the discount for that uncertainty tends to be larger than the discount for any single weakness.

The central design choice is what the client buys. A retainer that sells hours invites the client to count them. A retainer that sells an outcome, such as monthly management information that the finance director can act on, a standing legal service for routine commercial matters, or a continuous programme of improvement, invites the client to judge results. For most SMEs, the second approach is easier to defend, easier to renew and more profitable when the team becomes more efficient.

Exhibit 4 sets out four models in ascending order of commitment. Access retainers reserve capacity and priority; assurance retainers deliver a defined cycle of work, such as filings, reviews or audits; advisory retainers provide continuing counsel with agreed review points; managed services take over a function against service levels. Each carries a different price logic, a different delivery risk and a different valuation story, and most firms will run two or three side by side.

Pricing should be built from value and capacity. Value means the cost of the problem the client avoids or the benefit it gains. Capacity means the people and hours you must hold in reserve to deliver the service on time. Tiered packages, tied to client size or complexity, usually work better than a bespoke fee, because they make the choice visible and reduce negotiation. We would avoid hourly caps inside retainers, since they reintroduce the habit the model is meant to retire.

The Thomson Reuters Institute finding that fewer than one in five advisers feel certain their pricing reflects real value has a practical reading: most firms cannot yet explain their price in terms of client results. A retainer forces the question. If you cannot name the client outcome that justifies the monthly fee, the client will not be able to either, and the first budget review will treat the retainer as a cost to be trimmed.

The action is a pilot. Choose one service, define the package, price it on value and capacity, and offer it to a small group of existing clients on a defined review date, perhaps six months out. Track delivery time against the fee and record what clients value. The pilot costs little, and the evidence it produces will make the wider rollout more credible to your team and to clients.

The safest route to recurring revenue starts with the recurring work that already exists. Every firm has clients for whom it performs a regular cycle of tasks, whether monthly reporting, quarterly reviews, annual filings or continuous support. These relationships have the strongest case for a retainer because the client already behaves as though one exists. Exhibit 5 helps sort the book by recurrence of need and strength of relationship, and suggests where to begin.

Clients with a recurring need and a strong relationship are the first wave. Offer them the packaged service, explain what changes in their favour, such as predictable cost, priority access and faster response, and agree the contract terms: duration, notice, scope change and annual price review. Clients with a recurring need but a weaker relationship need more evidence, so use a shorter initial term. Clients with one-off needs stay on projects, and the retainer is introduced later as a follow-on.

Contract terms deserve as much attention as the price. A minimum term, a clear notice period, a defined process for changing scope and an annual price review linked to an agreed index or review date are the features that make revenue predictable and valuable. They also protect the client by making it clear what is included. Where local law or sector rules restrict certain terms, take advice from a qualified lawyer, since this article is information only.

Cash timing needs planning. Moving from project invoices to monthly fees can create a dip if large milestone payments are replaced by smaller regular ones, especially in the first year. Model the transition month by month, and consider billing a first period in advance. Many firms find the dip is brief when the migration is staggered across the client base and when new projects continue to arrive alongside the retainers.

Exhibit 6 sets out six steps: map revenue, define the products, price them, pilot with a few clients, convert the first wave and then review. The sequence is deliberately slow at the start, because the first conversions teach the firm most of what it needs to know about scope, delivery and client reaction. Rushing to convert the whole book usually produces poorly defined retainers and avoidable churn.

People matter as much as contracts. Delivery teams used to chargeable-hour targets may resist a model in which efficiency benefits the firm. Adjust targets and incentives to reward retention, margin and client results, and explain to staff how the model supports steadier work and fewer end-of-month scrambles. If incentives still reward hours, the retainer will be quietly managed back into a time-and-materials engagement.

The first return from recurring revenue is usually cash, not value. Intrum, a credit-management company whose European Payment Report 2025 draws on insights from 9,150 executives across 25 European countries, calculates that 11 per cent of revenues are paid late to businesses every year. The report is a vendor survey and its figures describe the whole business population, but late payment is a familiar problem for professional firms that invoice in arrears for work already delivered.

A retainer billed monthly in advance, by direct debit or card where clients accept it, changes the working-capital position of the firm. It reduces the amount of time the firm funds delivery, shortens the collection cycle and lowers the time senior people spend chasing invoices. Those benefits are immediate and measurable, and they arrive well before a sale or refinancing makes the valuation case. For a CFO, they also help to fund the transition itself.

There is a further effect on risk. A firm that knows its contracted revenue for the next quarter can plan hiring, utilisation and investment with greater confidence. It can also negotiate with lenders from a stronger position, since contracted revenue is easier to evidence than a pipeline of proposals. We would still be cautious: a lender or investor will look at contract terms, churn history and concentration, not simply at the label on the invoice.

Not every client will accept advance billing, and the right answer will vary by sector and size. Offer it as the standard, with a clear reason, and allow exceptions for large clients where credit risk is low. Record the exceptions and review them annually. The point is to make the default favourable to the firm, and to know the cost of every departure from it.

The action is to add two measures to the monthly board pack: the share of revenue billed in advance and the average days to collect. Neither requires new systems. Both show whether the migration is improving the firm's cash position, and both give the owner an early indication of where the next conversation with a client may be difficult.

Recurring revenue must be governed, or it decays. A retainer that was profitable in its first year can become unprofitable if scope creeps, if the team spends more time than the fee supports, or if the client's needs change. Each retainer should have an owner, a scope document, a margin target and a review date. Tracking effort against fee, even informally, shows quickly which retainers are healthy and which are consuming capacity without return.

The board should receive a short, consistent set of measures: monthly recurring revenue, new and lost recurring revenue, net revenue retention, client churn, share of revenue under contract, average contract length and gross margin by retainer. These are the measures a buyer or lender would ask for. A firm that can show twelve months of them has evidence, while a firm that has to build them under diligence deadlines has assertions.

Pricing discipline is the second element. Annual price reviews, linked to an agreed index or review date, protect margin when costs change, and tiered packages make upgrades natural. A firm should also decide in advance what it will do when a client asks for more than the package provides: charge for a scope change, offer a higher tier or decline. A retainer that absorbs every request becomes a bundle of unpaid projects.

We would also caution against targets that are too neat. There is no universal benchmark for the share of revenue that should be recurring in a professional-services firm, and published figures for specific shares vary by sector and by definition. A better target is directional: the share under contract should rise each year, churn should fall, and every new retainer should clear a margin hurdle. The board can then judge progress without relying on a borrowed benchmark.

For the CFO, the decision is to commit to a twelve- to eighteen-month programme with a named owner, a pilot, a first-wave conversion and a regular reporting cycle. The results should be visible in cash flow within the first year, in forecast quality within the second and in valuation conversations after that. The firms that succeed are those that treat recurring revenue as an operating discipline, not as a pricing experiment.

Karter McKinley's Commercial Growth & Sales Execution work supports owner-managed firms in defining retainer products, setting prices on value and capacity, and running the client migration and reporting described here. We work from your own revenue data and contracts, and we do not assume a particular software platform. This article is information, not legal or financial advice.