Recurring revenue for consultants - it changes what you can plan, not just what you earn

Recurring revenue for consultants means replacing project-by-project income with a subscription model: clients pay a predictable monthly or annual fee for ongoing access to your expertise, delivered through software rather than through your calendar. Ferrous Labs' Science of AI SaaS™ maps the route from proven methodology to subscription income.

The usual case for it is made in terms of money, and that is the least interesting part. Subscription income is not automatically larger than project income, and in the first couple of years it is frequently smaller. What changes is something harder to put on a chart and considerably more useful to run a business on: how far ahead you can see.

A consultancy living on projects plans in the dark. You can forecast the quarter if the pipeline holds, you cannot commit to a hire until the work that would pay for them is signed, and you take engagements you would rather decline because declining them in a quiet month feels reckless. None of that is a failure of management. It is what happens when every pound of next year's income still has to be won.

In this blog, Elliott Prince, Managing Director at Ferrous Labs, explains why the market has stopped doing the work for consultancies, what genuinely counts as recurring revenue, and why the real prize is what a forecastable base lets you decide.

The market stopped doing the work for you

For two years after the pandemic, project revenue grew because the market grew. The Management Consultancies Association put UK consulting fee income growth at 23% in 2022 and 11% in 2023, and its 2025 Annual Industry Report values the sector at £20.4bn with growth forecast at 3.6% for 2025 and 7.8% in 2026.

Read that sequence rather than any single number in it. Twenty-three per cent, then eleven, then a forecast of under four. The sector is still growing and I would not dress this up as a crisis, but growth of 3.6% does not carry a business the way growth of 23% does. In the first case the market lifts you; in the second you have to be structured to grow on your own. That is a change in what your business model has to do for you, and it arrived without much announcement.

A retainer is not recurring revenue

This is the distinction that decides whether any of this works, and it gets blurred constantly, including in plenty of advice that should know better.

A retainer is recurring in the sense that it arrives monthly. It is still your time, though, sold in advance rather than in arrears. The ceiling has not moved, because the thing being bought is still hours that only exist if somebody turns up to supply them, and the moment your team is fully committed the revenue stops growing no matter how many clients want it. Retainers are a genuine improvement on project work and worth having. They are not a different model, they are the same model with better cash flow.

Revenue is genuinely recurring when the thing the client pays for keeps delivering while you are somewhere else. That is a demanding test and it rules out most of what gets described this way. It means the value has to sit in a system rather than in a person: the method captured in software, the judgement encoded well enough that the output is reliable without a senior review on every case, the client able to get what they need on a Tuesday afternoon when nobody at your end is thinking about them.

Which is why productising is the route rather than one option among several. You cannot subscribe to a person. You can only subscribe to something that runs, and building that thing is the actual work behind every recurring-revenue story worth reading.

What it changes is the planning

Suppose you get there, and a meaningful share of next year's income is contracted before the year starts. Here is what that buys, and almost none of it appears in the revenue line.

You can hire ahead of demand rather than behind it, which is the difference between recruiting the person you want over two months and recruiting whoever is available in three weeks because a project landed. You can invest in things that pay back slowly, including the next product, because the base covers the floor while they mature. You can decline work that does not fit, which improves everything else you do by a margin nobody measures, since the engagements consultancies regret are almost always the ones taken in a nervous month.

And you can survive a slow quarter without it becoming a decision about people. That is worth more than the margin improvement, because the cost of losing good people in a downturn is paid for years afterwards in capability you no longer have.

There is a further effect on what the business is worth. A consultancy valued on project income is being valued on a multiple of uncertainty, and buyers discount accordingly, because they are buying a pipeline that depends on relationships which may not transfer. Contracted subscription income is a different asset entirely, and it is one of the few things that reliably changes the number at the end of a sale process.

Iconic Digital built the second line beside the first

We are building Growth Gorilla with Steve Pailthorpe and the team at Iconic Digital, and the framing of it is the part worth borrowing. They had a successful marketing agency whose revenue was tied to billable hours and team capacity, where every new client meant more manual delivery. The product line they wanted had to open a recurring-revenue stream without competing with the services that were already paying the bills.

That constraint shaped the whole thing. The suite is built for small business owners who were never going to buy agency retainers anyway, which is why it extends the business rather than cannibalising it, and it is deliberately built so the assistants do the work rather than the agency doing it behind a subscription label. The test in the previous section is met: it keeps delivering when nobody at Iconic Digital is thinking about that particular customer.

It is also worth saying that the product is in active build rather than finished, because the honest version of this includes the timescale. Turning a service business into one with a product line is a programme of work, not a pivot you complete in a quarter.

Start with the engagement you have run most often

You will not do this while the pipeline is healthy, because there is no pressure to, and you will not do it when the pipeline is empty, because there is no money to. That leaves now, which is an unsatisfying answer and the only true one.

The practical first move is small. Look back over the past two years and find the engagement you have run most often, the one where you already know what the client will ask and roughly what the answer will be. That repetition is the signal, and it is much more reliable than any market trend, because it is evidence from your own business rather than a forecast about somebody else's. Then ask the hard question about it: if this ran without you in the room, would the output still be good enough to charge for?

If the answer is yes, you have found the thing to build. If it is no, you have found out what you would need to encode first, which is just as useful and a good deal cheaper to learn now. Either way you end up with something better than a revenue target: a clear view of which part of your business could keep working while you are doing something else.

Frequently asked questions about recurring revenue for consultants