Online tax support for small businesses

Offer remote tax planning, VAT and company tax help to small firms on monthly packages.

Startup cost£1k to £5k
Monthly revenue£1k to £5k
Time needed15+ h/week
First incomeMonths
  • £1k-5k
  • Part-time
  • Online

Estimates for a small start in the UK, not guarantees.

Official data

12,759 UK companies in this field, 18% registered in the last 2 years

SIC 69203 “Tax consultancy”. Source: Companies House, November 2026.

What it is

A remote service for small limited companies and partnerships covering corporation tax, VAT returns, director tax planning and HMRC correspondence, delivered by video call and shared online tools.

Your first three steps

  1. Choose a niche such as contractors, online sellers or small shops, and set clear package prices
  2. Set up a simple website, client onboarding forms, secure document sharing and professional indemnity insurance
  3. Reach out to bookkeepers and accountants who may refer tax work to you
Who pays

Small limited companies, partnerships, contractors and start-ups that want a tax specialist without hiring in-house.

How it makes money

Monthly or annual retainers, fixed fees for corporation tax and VAT work, and one-off fees for projects such as tax reviews or HMRC enquiries.

Skills that help
  • Knowledge of corporation tax, VAT and director tax
  • Comfortable with accounting software
  • Clear communication with business owners
Watch out for
  • Anti-money laundering supervision and checks on new clients, so check the current rules
  • Professional indemnity insurance, as business tax advice carries higher stakes
  • Registering as a tax agent with HMRC and getting client authorisation
  • Data protection duties and ICO registration, as you will hold financial records
  • Keeping knowledge up to date as tax rules change often
  • Check how you describe yourself, as some titles linked to accountancy bodies are protected

Deep research report · UK

Everything you need to start: online tax support for small businesses

Researched with live web search for United Kingdom: real startup prices, the licences and rules, what others charge, a break-even example, how to find your first customers and a 30-day launch plan. With sources.

  • Startup costs with real prices
  • Licences, registration and rules
  • Pricing: what others charge
  • Break-even example
  • Finding your first customers
  • 30-day launch plan
  • Risks and how to reduce them
Ready in about 2 minutes · one-off payment, tax included

See a full sample report

Questions people ask

How much does it cost to start an online tax support business?

Startup costs are typically around £1,000 to £5,000, depending on your software, insurance and how you set up and promote the service. These are estimates, so check your own needs before spending.

How much can an online tax support business earn?

Monthly revenue is typically around £1,000 to £5,000, depending on how many small business clients you take on and the packages you offer. You would typically need at least around 15 hours a week.

What rules should I check before offering business tax advice?

Check the current anti-money laundering supervision rules and client checks, registering as a tax agent with HMRC, client authorisation, data protection and ICO registration, and professional indemnity insurance. Also check how you describe yourself, as some titles linked to accountancy bodies are protected.

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