Hidbrain
Coming soon — join the waitlist

CT600 filing made simple for UK micro-entities

SmallTax files your Corporation Tax return (CT600) and FRS 105 micro-entity accounts together — built by Hidbrain, the UK ERP and finance automation specialists.

Join the waitlist Free deadline reminders

CT600 + FRS 105 together

File your Company Tax Return and micro-entity accounts in one go — no double-entry, no switching tools.

Built for micro-entities

Designed for the typical UK SME filing FRS 105 accounts. No complex configurations, no accountancy jargon.

Guided filing flow

Step-by-step guidance through your Corporation Tax return. Know what you're filing and why, at every step.

Deadline reminders built in

Never miss a CT600 or Companies House deadline again. Integrated with the Hidbrain compliance reminder tool.

Who it's for

Built for the typical UK limited company

Turnover under £632K (micro-entity threshold)
Filing FRS 105 abbreviated accounts
Profits below the CT instalment threshold
No complex group structures or cross-border issues
Director-led, with or without an accountant
Wants to understand the filing — not just sign it off

If your situation is more complex — groups, large company quarterly CT, audit requirements — SmallTax isn't the right tool. Speak to an accountant or consider a full practice management system.

Be first to know when SmallTax launches

Join the waitlist and get early access. No obligation.

Join the waitlist

While you wait — set up your free deadline reminders.