What is a consultancy business?

A consultancy sells expert advice or services to organisations, usually on a project or retainer basis. UK consultancies range from sole-trader independent consultants to multi-partner firms. The common structure for a one-person consultancy is a limited company with the consultant as the sole director and shareholder, billing day rates or fixed-price projects.

How do you price consultancy work?

Three common models: day rate (most common for project work), retainer (fixed monthly fee for ongoing access), or fixed-price by project. Day rates start around £400 for junior independent consultants and run to £2,000+ for senior specialists. Retainers typically £1,500 to £8,000 per month. Charge based on the value delivered, not the hours worked, where possible.

Do I need professional indemnity insurance?

Yes, for almost any consultancy work. Professional indemnity insurance protects against claims that your advice caused financial loss. Most clients will require it as a contract condition. UK premiums for an independent consultant start around £300 to £800 per year depending on cover level and sector. Public liability and cyber insurance are common add-ons.

How long does it take to make a consultancy profitable?

Independent consultants who launched with existing client relationships often see profitable months within the first quarter. Those building from scratch typically take six to eighteen months to a stable book of clients. Year-one revenue varies widely; a single retainer can transform the financial picture, and most successful consultants have one to three retainers underpinning project work.

Starting a Consultancy Business in the UK (2026)

Step 1: positioning

The most common reason a new consultancy fails is generic positioning. "Strategy consultant" or "operations consultant" tells the market nothing. The first decision is to name a specific industry, function and problem. "Customer retention for UK SaaS companies between £2m and £10m ARR" is a position. "Operational due diligence on mid-market private equity deals" is a position.

A sharp position makes every other step easier: client identification, sales messaging, case studies, pricing. Start narrow and widen only once you have momentum. Most successful independent consultancies sell to a small, specific audience the consultant deeply understands.

Step 2: registration

A one-person consultancy typically registers as a limited company because clients prefer to contract with a company, the tax position works well at consultancy rates, and personal liability is limited. The Your Company Formations company registration service handles incorporation, registered office, and the basic paperwork.

A sole-trader structure is simpler for the first few months while you test the market. Most consultants move to a limited company within twelve months once revenue stabilises. The tax comparison is at the linked page.

Step 3: contracts, insurance and accounts

Three operational items have to be in place before the first client invoice. A consultancy contract template (most clients will redline yours, but having a starting position matters). Professional indemnity insurance and public liability insurance. And a bookkeeping setup that tracks income, expenses and VAT (which kicks in at £90,000 of taxable turnover).

Standard tooling: Xero or FreeAgent for bookkeeping, an accountant on a fixed fee for year-end accounts and tax filings, and a business bank account separate from personal. Total monthly cost £100 to £200 for the tooling, £80 to £200 per month for an accountant.

Step 4: the first three clients

Most successful consultancies start with three sources of first clients: ex-employers, ex-colleagues now at other companies, and warm introductions. Outbound cold sales is inefficient at this stage. Spend the first 90 days having structured conversations with everyone in your existing network who might either become a client or refer one.

A first project for a known contact is worth more than a larger first project for a stranger: it produces a case study, a reference and momentum. Price the first projects at the lower end of your intended range to win them, then move to standard rates once you have proof.

Step 5: pricing

Three common pricing models:

Day rate. The default for discrete project work. Independent consultants start at £400 to £900 per day, with experienced specialists at £1,200 to £2,000+. The day-rate model is straightforward but caps total revenue at hours worked.

Retainer. Fixed monthly fee for ongoing access, advice or a defined scope of work. Typical retainers £1,500 to £8,000 per month per client. The advantage is predictable revenue; the constraint is time discipline.

Fixed-price project. A single price for a defined deliverable. Best when the scope is clear and the value to the client is well understood. Higher margin potential than day-rate work; higher risk if the scope drifts.

Most mature consultancies blend all three: one or two retainers for base income, day- rate work for active projects, occasional fixed-price work for high-value deliverables.

Step 6: cash management

Consultancy cashflow is lumpy. Invoices land 30 to 60 days after work, sometimes longer for corporate clients. Build at least three months of operating cost as a working capital buffer before quitting the day job. The can I afford to quit calculator models the runway before launch.

Once running, the practical structure is: invoice immediately on milestone completion, chase at 14 days, late-payment interest at 30 days, and reserve 25 to 30% of every invoice for tax in a separate account. The tax reserve is the single most common cause of cashflow shocks in year two.

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Frequently asked questions

What is a consultancy business?: A consultancy sells expert advice or services to organisations, usually on a project or retainer basis. UK consultancies range from sole-trader independent consultants to multi-partner firms. The common structure for a one-person consultancy is a limited company with the consultant as the sole director and shareholder, billing day rates or fixed-price projects.
How do you price consultancy work?: Three common models: day rate (most common for project work), retainer (fixed monthly fee for ongoing access), or fixed-price by project. Day rates start around £400 for junior independent consultants and run to £2,000+ for senior specialists. Retainers typically £1,500 to £8,000 per month. Charge based on the value delivered, not the hours worked, where possible.
Do I need professional indemnity insurance?: Yes, for almost any consultancy work. Professional indemnity insurance protects against claims that your advice caused financial loss. Most clients will require it as a contract condition. UK premiums for an independent consultant start around £300 to £800 per year depending on cover level and sector. Public liability and cyber insurance are common add-ons.
How long does it take to make a consultancy profitable?: Independent consultants who launched with existing client relationships often see profitable months within the first quarter. Those building from scratch typically take six to eighteen months to a stable book of clients. Year-one revenue varies widely; a single retainer can transform the financial picture, and most successful consultants have one to three retainers underpinning project work.

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