Free CT600 & Accounts Software
File iXBRL accounts to Companies House, CT600 to HMRC, or both - completely free for UK micro-entities
Why Our Free CT600 & Accounts Software?
File Your Way
File accounts only, CT600 only, or submit both to Companies House and HMRC in one go - it's your choice.
Quick & Simple
Pre-populated with Companies House data. Just add your financial figures and submit.
Secure & Compliant
Built to government specifications with proper authentication and secure data handling.
How It Works
Search Your Company
Start typing above to find your company from Companies House records.
Enter Financial Data
Add your profits, losses, and balance sheet figures for the accounting period.
Review & Preview
Generate iXBRL accounts and review your CT600 calculations before submission.
Submit to Authorities
File your accounts to Companies House, your CT600 to HMRC, or both - it's entirely up to you.
Free CT600 & Accounts Software Built for Small Businesses
Most CT600 software costs £45-200 per submission. TinyTax is completely free - giving you professional-grade accounts and corporation tax software without the price tag.
Free CT600 Filing
Submit your corporation tax return to HMRC with automatic tax calculations and iXBRL computations - completely free.
Free Accounts Software
Generate and file iXBRL accounts to Companies House. Supports micro-entity abbreviated accounts and full accounts.
Optional Dual Submission
File both CT600 and accounts together if needed. Or file them separately - TinyTax handles both scenarios.
HMRC Service Replacement
HMRC's free CT600 service closes March 2026. TinyTax provides a free alternative that's even better.
Micro-Entity Specialist
Purpose-built for UK micro-entities and small businesses. Simple, fast, and compliant.
100% Compliant
Fully compliant iXBRL tagging for Companies House and HMRC-recognised CT600 format.
Is TinyTax Right for You?
TinyTax is designed for UK Micro-Entity Limited Companies
To qualify as a micro-entity, your company must meet at least two of the following criteria:
Perfect for: Small limited companies, freelancer companies, contractor companies, and single-director businesses that need to file unaudited micro-entity accounts and corporation tax returns.
Current Limitations
TinyTax currently does not support:
- Companies with associated companies (group structures or common control)
- Director's loan accounts or loans to participators
- Research & Development (R&D) tax credits
- Creative industry tax reliefs
- Capital allowances beyond Annual Investment Allowance
- Companies with investment business or rental income
- Foreign income or overseas tax considerations
- Complex loss reliefs (group relief, carry back claims, or sideways relief)
If your company has any of these requirements, you'll need to use alternative software or consult an accountant.
Frequently Asked Questions About Free CT600 & Accounts Software
Is TinyTax really free CT600 software?
Yes! TinyTax is completely free. You can file both your CT600 corporation tax return to HMRC and iXBRL accounts to Companies House at no cost. Unlike other CT600 software that charges £45-200 per submission, TinyTax provides professional-grade tax and accounts filing completely free.
Can I file both accounts and CT600 with this software?
Absolutely. TinyTax handles dual submission - file your iXBRL accounts to Companies House and your CT600 corporation tax return to HMRC in one streamlined process. You don't need separate software for each filing, which saves you time and money.
Can I file just accounts or just CT600 separately?
Yes! TinyTax is completely flexible. You can file only your Companies House accounts, only your HMRC CT600 return, or both together - whatever you need. There's no requirement to file both simultaneously. Many users file their accounts first, then come back to file their CT600 later when they're ready.
What's the alternative to HMRC's free CT600 service?
HMRC's free Corporation Tax online filing service is closing on 31 March 2026. TinyTax provides a free alternative that's even better - it handles both your CT600 and Companies House accounts in one platform, with automatic tax calculations and proper iXBRL tagging.
Does this work for micro-entities and small businesses?
Yes, TinyTax is specifically designed for UK micro-entity limited companies and small businesses. If your company meets the micro-entity criteria (turnover under £1m, balance sheet under £500k, or under 10 employees), TinyTax provides everything you need to file your accounts and corporation tax for free.
What type of accounts can I file?
TinyTax supports both abbreviated micro-entity accounts and full accounts in iXBRL format. You can file dormant company accounts or trading company accounts. All accounts are properly tagged for Companies House electronic filing.
Is the software HMRC and Companies House compliant?
Yes, TinyTax is fully compliant with HMRC and Companies House requirements. We generate properly formatted CT600 returns with iXBRL computations for HMRC, and correctly tagged iXBRL accounts for Companies House. All submissions go directly through official government gateways.
Pricing
Free.
Perfect for Accounting Firms
TinyTax streamlines the preparation and filing of micro-entity accounts and corporation tax returns for multiple clients.
Your firm and your clients get free access to TinyTax
Manage all your clients in one place with ease
Import trial balances from Excel or CSV to auto-populate client returns
Manage your team