For UK micro-entity accounts

File your Corporation Tax
without an accountant

Answer a few questions, review your return, and submit directly to HMRC — all in under 30 minutes.

Start filing now See pricing

From £19 · dormant or active · no subscription required

Why directors use OneFiler

Paying an accountant £500+ for a simple dormant return

→ File it yourself for £19 — takes 10 minutes

Chasing your accountant for weeks before the deadline

→ Do it in one sitting, on your schedule

Confused by HMRC's digital filing requirements

→ A simple step-by-step wizard walks you through it

HMRC closed its online filing portal in April 2026

→ We handle the submission for you — just click Submit

How it works

Five guided steps — no tax knowledge required

Your Company
Balance Sheet
Tax Figures
Review
Submit

Everything included

One price covers the full filing, start to finish

Annual Accounts

Your balance sheet prepared automatically in the format HMRC and Companies House require.

Tax Return

Corporation Tax return filled in from your figures — no need to understand the form.

Submit to HMRC

Filed electronically in one click. No posting, no portal, no agent.

Companies House

Annual accounts filed at the same time — one fewer thing on your to-do list.

Digital Formats

All the technical formats HMRC requires are generated behind the scenes.

Secure

Your HMRC credentials are encrypted and never stored in plain text.

Is OneFiler right for your company?

OneFiler is for micro-entities — you must meet at least 2 of these 3 criteria:

Turnover

Under £1m

Balance sheet

Under £500k

Employees

10 or fewer

Simple, transparent pricing

Pay only for what you need. No monthly fees, no surprises.

Dormant Company

£19one-time

File a dormant CT600 and accounts

Dormant CT600 filing
Dormant accounts (FRS 105)
Direct HMRC submission
Companies House filing

Also included in the Annual Plan

File your Corporation Taxwithout an accountant