Last reviewed 29 August 2026
Most business owners choose a legal adviser under time pressure: a contract needs signing, a dispute has landed, an investor has sent a term sheet. The result is often a decision made on availability rather than fit, and a working relationship that never quite works.
Commercial legal work is not commoditised. The difference between advisers is not simply price; it is whether they understand your commercial model, respond at the speed your business moves, and tell you when something is not worth arguing about.
This guide sets out a practical framework for assessing a commercial adviser, the questions worth asking, and the warning signs that suggest a poor fit.
Start with the type of work, not the firm
Commercial law covers a wide range: contract drafting, supply agreements, disputes, regulatory advice, governance, data protection, intellectual property. Very few advisers are genuinely strong across all of them, and a firm's website will rarely admit a gap.
Define the work first. Is this a one-off contract review, an ongoing need for commercial documents, a dispute that may reach litigation, or a compliance question? Each calls for a different profile of adviser. An adviser who is honest that a matter sits outside their core work — and can point you elsewhere — is usually a better long-term partner than one who takes everything.
Understand who will actually do the work
In larger firms, the person who attends the pitch is frequently not the person drafting your documents. Ask directly: who will do the work, what is their experience with this type of matter, and who supervises them?
For smaller businesses, a founder-led or partner-led practice often produces better outcomes, because the person with the experience is also the person on the file. The trade-off is capacity, so ask about availability and how urgent matters are handled during holidays.
Fees: structures, estimates and scope
There are four common structures: hourly rates, fixed fees, capped fees and retainers. Fixed fees suit defined pieces of work such as a set of terms and conditions or a shareholders' agreement. Hourly rates suit unpredictable work such as negotiations and disputes, but should come with an estimate and an agreement to flag when it will be exceeded.
Ask what the fee covers and what it does not. A fixed fee for a contract usually assumes a set number of drafting rounds; three rounds of counterparty amendments are a different job. Get the scope in writing, and expect a clear engagement letter setting out the basis of charging.
Regulation, insurance and status
Check the regulatory status of the adviser. Solicitors' firms are authorised and regulated by the Solicitors Regulation Authority, which brings the SRA's client money rules, compulsory professional indemnity insurance at prescribed levels and access to the Legal Ombudsman.
Some commercial legal services are provided by consultants, in-house-style advisers or unregulated providers. That is lawful for most commercial work — reserved activities such as conducting litigation and certain probate and conveyancing work are restricted — but you should know which you are instructing, what insurance is in place and what complaints route exists. Ask; a straight answer is a good sign.
Responsiveness and commercial judgement
The most common complaint about legal advisers is not cost — it is silence. Agree expectations at the outset: how quickly will you get an acknowledgement, who is the point of contact, and how will you be updated on progress and spend.
Test commercial judgement early. Give the adviser a real problem and see whether the answer identifies the two or three points that actually matter, or lists every conceivable risk without ranking them. A good adviser tells you which clauses to fight for and which to concede so the deal closes.
Questions worth asking before you instruct
Ask what comparable matters they have handled, how they charge and what triggers extra cost, who does the work, what their typical turnaround is, how they handle conflicts of interest, and what happens if the matter escalates beyond their capacity.
Also ask what they would do differently from your current arrangement. An adviser who has read your existing contracts and can point to a specific weakness has demonstrated more than any credentials list. Finally, ask for a client reference from a business at a similar stage and in a comparable sector.
Key points
- Define the work type before shortlisting advisers — few are strong across all commercial disciplines.
- Confirm who will actually draft and negotiate, not just who attends the pitch.
- Get the fee basis and the scope in writing, including how many drafting rounds are included.
- Check regulatory status, professional indemnity insurance and the complaints route.
- Agree response-time expectations at the outset — silence is the most common complaint.
- Test commercial judgement with a real problem before committing to a retainer.
Frequently asked questions
- Does my adviser need to be local?
- Not legally, but proximity still helps for businesses that value face-to-face meetings and an adviser who understands the local commercial landscape. For Oxfordshire and Thames Valley businesses, a nearby adviser can attend negotiations and board meetings without travel cost becoming a factor.
- Is a bigger firm safer?
- Bigger firms bring depth and bench strength, which matters for complex, multi-jurisdictional or high-value work. For most SMEs and scale-ups, they also bring higher rates and more delegation. Match the firm to the matter rather than assuming size equals quality.
- What should an engagement letter contain?
- The scope of work, the basis of charging and any estimate, who is responsible for the matter, how complaints are handled, data protection information and the terms of business. Read it — it defines what you are entitled to.
- How do I keep legal costs under control?
- Provide complete background at the start, consolidate questions rather than emailing piecemeal, agree fixed fees for defined work, and ask for a spend update at agreed intervals. Most cost overruns come from scope drift, not from hourly rates.