Ask most partners within accountancy firms how they plan to grow and the answer comes back the same way almost every time.
Win more clients, then hire more people.
It is the model the profession has worked to for decades and, on the surface, it makes sense. As fee income grows, you need more hands-on deck.
However, if you look a little closer, the numbers behind this approach start to diverge.
Qualified accountants are hard to find, recruitment takes months rather than weeks and every new hire brings a new (often higher) salary, a training period and time to settle in before they become fully productive.
Grow this way for long enough and a firm can end up needing to win new business simply to cover the cost of the people it hired to handle the previous round of client wins.
There is a better way to think about growth, and it comes down to a simple idea. The relationship between the work you take on and the people you recruit to deliver it does not have to stay fixed.
The 1:1 trap
Most firms grow in a straight line, following the same simple equation. A certain amount of new fee income requires a certain amount of additional headcount, with the two increasing roughly in step.
This approach seems logical, but it creates risks that many practice leaders do not immediately recognise, particularly as the skills gap within the UK accountancy profession continues to grow.
If you have tried to hire a qualified accountant recently, you will know that recruitment costs add up quickly once agency fees, advertising and the partner time spent interviewing are factored in.
For example, according to Recruitly’s 2026 Fee Guide, hiring an accountant on a salary of between £50,000 and £60,000 could cost around £8,750 to £12,000 in recruitment fees alone, based on a typical agency fee of 17.5 to 20 per cent.
A new starter is rarely productive from day one. They need time to understand your systems, processes and clients before they can contribute fully.
This onboarding all adds to the investment before a new recruit is generating value for the business. Even once they are fully established, there is always the possibility they leave, taking valuable knowledge of your clients and your processes with them.
None of this is anyone’s fault. It is simply what happens when growth and recruitment are tied together as closely as they usually are.
What is the magic ratio?
The magic ratio is the point at which a firm stops adding a full in house hire for every increase in workload and instead combines a smaller core team with flexible outsourced capacity.
The cost of hiring one qualified accountant internally can represent a significant investment when recruitment fees, salary and onboarding are taken into account. Depending on the role and outsourcing model, that same investment could provide access to several outsourced professionals who work as an extension of your team, with the added benefit of a wider pool of experienced specialists available when you need them.
Rather than recruiting a new team member every time fee income increases, a firm can expand the work of an outsourced team that is already experienced, already familiar with UK accounting standards and software, and already up and running.
The result is that fee income and internal headcount no longer have to move in lockstep. Revenue can grow faster than the size of the permanent team because production work scales through the outsourcing partner rather than through repeated recruitment.
That is the magic in the ratio. Growth without a one-to-one trade off against recruitment.
Why it works
Outsourced capacity can often be added in weeks rather than the months a typical recruitment process takes. There is no advertising, agency management or lengthy interview process.
Because experienced outsourced teams already understand bookkeeping, VAT returns, statutory accounts preparation and payroll processing, there is little time spent getting them up to speed before they begin contributing.
Capacity can also flex with the demands of your firm. During busy periods such as self-assessment season or a high volume of year ends, additional support can be brought in quickly and then adjusted as workloads return to normal.
Perhaps most importantly, it allows partners and senior staff to spend more time on the work that drives long term growth. That means advisory services, business development and the client relationships that build a firm’s reputation.
Getting your ratio right
The magic ratio is not about outsourcing everything. It is about being deliberate about what stays in house and what does not.
Judgement calls, advisory conversations and direct client relationships belong with your qualified team. That is where trust is built and where your firm delivers the greatest value to clients.
Production heavy, process driven work such as bookkeeping, reconciliations, routine compliance and payroll processing is where outsourcing can have the biggest impact.
It is worth looking honestly at your own numbers. How much new fee income has each recent hire actually needed to generate to justify their cost once recruitment, training and the time taken to reach full productivity are taken into account?
Firms that ask this question often find their own version of the magic ratio surprisingly quickly.
Ready to find your magic ratio?
If recruitment feels like the only lever you have for growth, it is worth knowing there is another way.
GI Outsourcing can build a flexible, experienced outsourced team that works alongside your firm, helping you take on more work without taking on more recruitment risk.
Get in touch today to find out how we can help your firm scale.
