The verdict in three sentences
For a 15-person accounting firm in London, a multilingual website costs between 12,000 and 30,000 EUR in 2026. A tax calculator at around 4,000 EUR is the best generator of qualified leads among exporting SMEs and foreign-owned companies. The site is delivered in 6 weeks, and one international client (10,000 to 25,000 EUR of yearly fees) pays it back.
What exporting SMEs and foreign investors check
A founder of an exporting SME or a European or Gulf investor setting up a UK subsidiary looks for a firm that handles corporation tax, VAT, payroll and Companies House filings. They check ICAEW or ACCA membership, specialisms, languages spoken and responsiveness. Pages in French or Arabic immediately reassure a client from continental Europe or the Gulf.
| Website element | Value for the firm | Indicative 2026 cost (EUR) |
|---|---|---|
| Service pages (audit, tax, payroll, incorporation) | Ranking for accountant London, education | 3,000 to 7,000 |
| Page for international and foreign-owned companies | Capture foreign investors | 1,600 to 3,600 |
| French version | European clients | 2,000 to 5,000 |
| Arabic version (RTL) | Gulf investors | 2,000 to 5,000 |
| Tax calculator | Corporation tax, employer NIC, cost of an employee | 4,000 |
| Secure document exchange | Encrypted file transfer | 2,400 to 5,000 |
| Booking and video call | First meeting without travel | 800 to 1,600 |
Professional bodies require marketing to be accurate and not misleading: the site informs without promising tax savings. The calculator therefore shows indicative estimates with a clear disclaimer.
Three packages depending on positioning
| Package | 2026 budget (EUR) | Scope | Timeline |
|---|---|---|---|
| Essential | 12,000 to 16,000 | 8 English pages, services, team, contact | 5 weeks |
| International | 18,000 to 24,000 | EN/FR/AR, international page, tax calculator | 6 weeks |
| Connected firm | 25,000 to 30,000 | International + document portal + tax blog | 6 to 7 weeks |
| Hosting and maintenance | 300 to 800 per month | Backups, security, calculator updates | Monthly |
| Annual budget update | 800 to 1,600 per year | Tax rates, NIC thresholds | Yearly |
Forms and the document portal process personal data, so UK GDPR applies, with ICO registration and a privacy notice. We price this compliance into the project.
The calculator, your best salesperson
A calculator that works out in 30 seconds the full cost of an employee or a company's tax bill attracts high-intent visitors. It asks for an email to send the detailed result, and that is where a qualified lead is born. In equipped firms, this kind of tool generates 3 to 8 meeting requests a month.
Mini case study
Sarah, partner at a 15-person accounting firm in London, chooses the International package at 21,000 EUR, plus 500 EUR a month of maintenance, 27,000 EUR in year one. The calculator generates 5 meeting requests a month, 1 in 6 converts: about 10 new clients a year. If 2 are foreign-owned companies at 15,000 EUR of yearly fees and 8 are SMEs at 6,000 EUR, the firm adds 78,000 EUR of recurring fees, nearly 3 times the investment.
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FAQ
How much does an accounting firm website cost in London?
Between 12,000 and 30,000 EUR in 2026 depending on languages and modules. The multilingual package with calculator sits between 18,000 and 24,000 EUR.
Why several languages?
French and Arabic reassure European and Gulf investors who prefer their own language for complex topics. Each extra language costs 2,000 to 5,000 EUR.
What does the tax calculator do?
It estimates corporation tax, employer contributions or the cost of an employee from 4 to 6 inputs. It costs about 4,000 EUR and is updated each year after the Budget.
Does the site meet professional body rules?
Yes, it informs without promising results or making aggressive claims. Calculator results are presented as indicative.
What is the timeline?
About 6 weeks, including 2 weeks to write and translate content. The document portal may add one week.
Let's scope your project. Tell us your services, target clients and languages, and we will price your site between 12,000 and 30,000 EUR, delivered in 6 weeks. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
