Frequently asked questions.

Not necessarily. If your company is a micro-entity with straightforward finances — one company, simple income and expenses, no complex transactions — you can file your own CT600 and accounts using software like SimpleCompanyTax. The platform guides you through every step in plain English. If your company has complex transactions, associated companies, R&D claims, or you're simply not confident handling it yourself, an accountant is worth the investment.

Can I file company tax myself? →

When people say "company tax," they usually mean corporation tax — the tax UK limited companies pay on their profits. Your company files a corporation tax return (CT600) to HMRC after each accounting period, reporting its income, expenses, and the tax owed. Corporation tax is charged at 19–25% depending on the profit level.

How to file company tax →

The CT600 is the electronic form UK limited companies use to file their corporation tax return with HMRC. It reports the company's income, deductions, and tax liability for an accounting period. The CT600 must be filed electronically in XML format and accompanied by iXBRL statutory accounts. Every limited company within the charge to corporation tax must file a CT600 — even if the company made no profit or is dormant.

What is a CT600? →

You still need to file. Even if your company had zero income, you're required to submit annual accounts to Companies House and (in most cases) a CT600 to HMRC confirming nil profits. No profit means no corporation tax — but missing the filing deadlines still incurs penalties. If your company is genuinely dormant, you may be able to notify HMRC and avoid CT600 filing entirely, but Companies House accounts are still required annually.

Dormant company tax return →

Dormant companies still have filing obligations. You need to file dormant accounts at Companies House annually and may need to file a nil CT600 at HMRC (unless HMRC has confirmed you don't need to). Dormant doesn't mean "nothing to do" — if a dormant company misses its deadlines, it faces the same penalties as an active company.

Dormant company tax return →

Two simple prices, per company, per year: £10 for dormant companies (no trading activity in the period) and £25 for trading micro-entities (FRS 105). Both tiers include CT600 generation, iXBRL accounts, direct HMRC + Companies House submission, unlimited revisions, and downloadable documents. No hidden fees, no per-filing charges, no premium add-ons.

Dormant filings and trading micro-entity filings are genuinely different pieces of work: a dormant return has no P&L, no tax computation, no fiscal-year apportionment, and a smaller set of iXBRL tags. Pricing each tier accordingly is fairer (and cheaper for dormant filers) than averaging them into one number.

Our focused scope lets us automate 99% of the computation and filing logic for dormant companies and micro-entities. We don't employ accountants to manually review every return — the software handles validation and compliance checking automatically. By serving two well-defined markets, we build deep automation and pass the savings on.

No problem — you pick the plan that matches this filing year at checkout. Next year you pick again. We don't lock you into a tier.

We accept all major credit and debit cards (Visa, Mastercard, Amex) via Stripe. All payments are processed in GBP. We never see or store your card details — Stripe handles all payment security.

If you're not satisfied with the service, contact support and we'll work with you to resolve the issue.

Contact support →

UK private limited companies (Ltd) that qualify as micro-entities, including: active trading companies, dormant companies, property income companies, companies with any profit level (all three CT bands with marginal relief), and companies with bank interest, loan relationships, and dividends.

Currently we don't support: companies with associated companies (changes the marginal relief thresholds), R&D tax credit claims, group relief or consolidated accounts, PLCs, LLPs, companies with overseas permanent establishments, short accounting periods (coming soon).

Yes. SimpleCompanyTax submits CT600 returns directly to HMRC via the Government Gateway Transaction Engine and files accounts with Companies House via the CH API. Production filings are accepted today.

Most micro-entity directors complete everything in 15–30 minutes. Dormant companies are faster — often under 10 minutes.

Yes. Your data is saved automatically as you go. You can close the browser and return at any time.

You can regenerate your documents as many times as you need. Before final submission, nothing is sent to HMRC.

CT600 XML (for HMRC), iXBRL XHTML (for Companies House and HMRC), and a tax computation (PDF and XHTML). All downloadable from your account.

Yes — we initiate both submissions from the same review screen. CT600 + iXBRL accounts go to HMRC; separate dormant or FRS 105 accounts go to Companies House.

On managed UK cloud infrastructure. Data is encrypted at rest (AES-256) and in transit (TLS 1.2+).

Yes — you can delete your account and associated data at any time, subject to statutory record-keeping requirements (financial records are retained for up to 6 years under UK law).

No. Never. Our Privacy Policy sets out exactly how we process and share data.

Privacy Policy →