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MPasko
Accounting and tax sector

Web design for accounting firms

A website that earns your clients' trust: a secure client portal for document upload, integration with the mainstream accounting systems (Xero, QuickBooks, FreeAgent, Sage, KashFlow), and compliance with GDPR, ICO guidance and professional-body confidentiality rules (AAT, ACCA, ICAEW). In 2024 I built the site for TaxOffice, an accounting firm (taxoffice.biz).

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  • Loads in < 1 s
  • 6 production deployments
  • PL · EN · DE

What you get in the accounting-firm package

Secure client portal (document upload, audit log, 2FA, EU hosting)

No more invoices sent by email (a GDPR risk). Clients log in with 2FA and upload PDF, JPG or PNG files through an encrypted form. Every access is written to an audit log (time, user, IP). Vercel EU hosting in Frankfurt, a processor DPA in place, TLS 1.3 and encryption at rest on S3-compatible storage.

Integrations with Xero, QuickBooks, FreeAgent, Sage and KashFlow

API connectors to the UK's mainstream accounting systems. Clients see in the portal: current VAT obligations, issued invoices, MTD submissions awaiting approval, outstanding balances. Synced on a schedule or on demand. On your side, no manual exports: clients help themselves.

Online pricing calculator (bookkeeping, payroll, VAT returns, year-end)

Clients pick their entity type (sole trader, Ltd, LLP), document volume and add-ons (payroll, MTD VAT, year-end accounts, P11D) and get an instant estimate. Your inbox and phone stop filling up with 'how much do you charge?'. Every calculation is saved for following up.

Tax blog with AAT/ACCA-credentialed authors (E-E-A-T)

An article publishing system with authors registered with a professional body (AAT, ACCA or ICAEW membership number, biography). Each article gets AccountingService and Article JSON-LD. Google trusts authors with formal credentials, a critical E-E-A-T signal for YMYL financial content.

How I work with an accounting firm

  1. Compliance check (GDPR, ICO, professional-body confidentiality rules)

    Before I quote, I check with you how clients currently deliver documents (email or Dropbox is high risk), where data is hosted (UK, EU or US) and who has access. GDPR, ICO guidance and AAT/ACCA/ICAEW confidentiality rules together add up to a professional-secrecy requirement stricter than plain GDPR.

  2. Information architecture (services, pricing, team, portal, blog)

    A page per service (bookkeeping, payroll, VAT returns, year-end accounts, tax planning, MTD), pricing with an online calculator, a team page with professional-body credentials and specialisations, the client portal as a separate authenticated path, and a blog for expert content. An accountant, TaxOffice included, is found by need rather than by name: a client types 'VAT returns' or 'bookkeeper near me', so each service gets its own page.

  3. Implementation on Next.js, AccountingService schema, Vercel EU

    Stack: Next.js 16, Tailwind v4, Vercel Frankfurt (EU). AccountingService JSON-LD for the firm, ProfessionalService for the team with credentials visible. PageSpeed above 95, TLS 1.3, HSTS preload, a DPA with every sub-processor (Vercel, SMTP, accounting system).

  4. Monthly support (VAT rates, pricing, tax blog)

    Monthly maintenance: current VAT rates, filing deadlines, MTD thresholds, blog publishing, Search Console position monitoring, minor front-end tweaks. An accounting firm's site, TaxOffice included, is judged in the weeks that matter to its clients: the January self-assessment deadline and each VAT quarter, when people look up deadlines and want to send documents. It must not need a developer then.

Packages for accounting firms

Three models matched to firm size, from sole practitioner to a practice with a portal for a hundred or more clients.

Solo practitioner

from £1,290

Landing page, services section, static pricing, GDPR contact form and blog (CMS). No client portal. The right fit for a sole-trader accountant or a one-person bookkeeping firm.

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Firm with portal

from £3,490

Everything in Solo practitioner, plus a client portal with document upload and audit log, one accounting integration (Xero, QuickBooks, FreeAgent or Sage), an online pricing calculator and a GDPR check. 2FA, EU hosting.

Choose a package

Multi-tenant practice

from £6,490

A practice with a hundred or more clients: multi-tenant portal, all accounting integrations, MTD export through the portal, CRM integration (HubSpot or Pipedrive), role permissions (client, assistant, lead accountant), an audit log you can export for HMRC.

Choose a package

Common questions from accounting firms

Yes. AAT, ACCA and ICAEW confidentiality codes plus the anti-money-laundering rules require: client data accessible only to licensed staff or people bound by confidentiality clauses, physical and logical protection (TLS, audit log), and destruction of data at the end of the engagement. I set up: EU hosting (Frankfurt), TLS 1.3, an audit log for every access, role-based access, DPAs with sub-processors, GDPR privacy notices and automatic account purging after termination.

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Technical care

Support after launch: daily backups, VAT-rate updates, uptime monitoring.

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Request a quote for your accounting firm

Quote within 24 hours and a fixed price before we start. Before I quote, I check how your clients deliver documents and where the data lives; the answer sets the scope of the portal.

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