E · Workflow, deadlines & operations
How Much Does It Cost to Start an Accounting Firm in the UK?
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Quick answer
Starting solo from home with existing qualifications can cost as little as a few hundred pounds in registration fees plus software subscriptions, while a fitted office and staff push costs into the thousands. The largest recurring costs are professional indemnity insurance, software and, once you take on staff, payroll. Break-even usually depends on how quickly you win recurring monthly-fee clients.
Key takeaways
- Fixed one-off costs (registration, insurance excess, initial software) are usually modest for a solo home-based start.
- Ongoing monthly costs (software, insurance premium, marketing) matter more than one-off setup costs.
- PI insurance and AML supervision fees are non-negotiable regulatory costs.
- Office space, staff and paid marketing are optional early on and can be added as revenue grows.
- Break-even is best planned around monthly recurring fee income, not one-off jobs.
What does it typically cost to start an accounting firm in year one?
A lean, home-based, solo start can run to a few hundred to a few thousand pounds in year one; a staffed office setup runs considerably higher [VERIFY].
| Item | Approx. cost | Notes |
|---|---|---|
| Practising certificate / AML registration | £100–£300 | Varies by body or HMRC fee |
| Professional indemnity insurance | £300–£1,500+ | Depends on cover level and services offered |
| Practice management / CRM software | £0–£100/month | Often scales with client numbers |
| Accounting/tax software licences | £20–£60/month per product | Bookkeeping, tax, payroll tools |
| ICO registration | £40–£60/year | Based on turnover and staff numbers |
| Website and basic marketing | £200–£1,000 | One-off build plus ongoing hosting |
| Company formation (if limited) | £12–£50 | Companies House fee |
What are the biggest cost drivers?
Professional indemnity insurance and staff costs are usually the two largest line items once a practice grows beyond a sole practitioner.
- PI insurance premiums rise with turnover and the services you offer.
- Employing staff adds salary, employer NIC, pension contributions and employers' liability insurance.
- Office space, if taken on, adds rent, utilities and business rates.
- Paid marketing (ads, directories) is optional but can accelerate client acquisition.
Which costs can I defer until I have clients?
Office space, paid staff, premium software tiers and paid advertising can usually all be deferred until fee income justifies them.
Most successful new practices start lean: home office, free or low-cost software tiers, and organic marketing (referrals, Google Business Profile, directory listings). Costs that cannot be deferred are regulatory ones — AML supervision, PI insurance and ICO registration are all required from day one of practising.
How much should I budget for software?
A realistic starting stack of practice management, bookkeeping, tax and payroll software typically costs from around £50–£200 a month combined, scaling with client numbers [VERIFY].
Per-client pricing models mean software cost scales with your client base rather than requiring a large upfront licence purchase, which suits a growing solo practice.
How do I plan when I will break even?
Model break-even around recurring monthly fee income covering your fixed monthly costs, rather than around occasional one-off jobs.
- List fixed monthly costs: software, insurance (monthly equivalent), any rent.
- Estimate average monthly recurring fee per client (e.g. bookkeeping, accounts, payroll retainer).
- Divide fixed costs by average monthly fee to estimate the client count needed to cover costs.
- Add a buffer for slow months and irregular one-off work.
- Revisit the model quarterly as real numbers come in.
What is the cheapest way to start an accounting practice?
Start solo from home, use your existing professional body membership for AML supervision, choose per-client software pricing, and rely on referrals and free directory listings for initial clients.
This route defers almost every discretionary cost until income arrives, leaving only the regulatory costs that cannot be avoided.
How Remindoo helps
Software cost is one of the few budget lines you can control precisely from day one. Remindoo's per-client pricing with unlimited users means your software cost scales directly with client numbers rather than requiring a large upfront licence spend, which helps when modelling break-even for a new practice. A 60-day free trial lets you test the platform against a real budget before committing. Built-in invoicing means you are not paying for a separate billing tool on top, keeping your monthly software stack simpler and cheaper to plan for as you grow from your first client to a full caseload.
Frequently asked questions
Can I start an accounting practice for under £500?
Yes, a lean solo home-based start covering registration, basic insurance and low-cost software can often stay within a few hundred pounds, though premiums and fees vary [VERIFY].
Is professional indemnity insurance compulsory?
Most professional bodies require it as a condition of holding a practising certificate, and it is good practice even where not formally mandated.
Do I need an office to start?
No, many practices start and remain successfully home-based, particularly where client meetings happen remotely or at the client's premises.
How much does AML registration cost?
Fees vary depending on whether you register with a professional body or with HMRC directly; check the current fee on the relevant registration page before budgeting.
What ongoing costs should I expect month to month?
Software subscriptions, insurance (if paid monthly), any office costs, and marketing are the typical recurring monthly costs for a small practice.
When should I budget for my first hire?
Once recurring monthly fee income comfortably and reliably exceeds your fixed costs plus the new hire's full cost, including employer NIC and pension.
Start your free Remindoo trial
Set up deadlines, onboarding and workflows for your new practice with a 60-day free trial.
Sources
Last updated 23 September 2026. General guidance, not legal or regulatory advice. Check with your professional body.
