Simple CT600 & Accounts Software
File iXBRL accounts to Companies House, CT600 to HMRC - FREE for dormant micro-entities
Not registered at Companies House? Click here
How It Works
From search to submission in minutes
Enter Your Financial Data
Search for your company, select your accounting period, and enter your profit & loss and balance sheet figures. We pre-populate company details from Companies House.
Review Your Documents
Preview your generated accounts and tax computations. See exactly how your corporation tax is calculated. We handle marginal relief, period splitting, and all the complex stuff automatically.
Submit to Authorities
Submit directly to Companies House and HMRC with one click. Track your submission status in real-time and download your filed documents for your records.
Loved by Small Businesses Across the UK
Join thousands of companies who've simplified their CT600 and accounts filing with TinyTax
Absolutely perfect and so easy to use! Importing from Xero made it a breeze.
Life SAVER literally. I was able finally to resolve those various codes and used your services today - it was sooo easy to use. Thank you so much for making this a free service for outfits like ours who can't afford accountants.
It's so simple yet effective in capturing all key figures for simple company like mine! Definitely easier than the official HMRC site. How is this available for free?
Was worried about the cost and hassle of software but tiny tax made it easy. Previously manually entering the figures into co house and hmrc took time but the entire process took less than 5 minutes.
I have been filing my returns for years through the Companies House and HMRC websites - I always dreaded it. This was the fastest and easiest submission ever. So much so that I look forward to the next fiscal year!
Simplicity, clarity, effectiveness.
It worked, first time, simple and solves a major issue in my business. Too small to require a full accountancy suite just to be able to file electronically.
"Tax doesn't have to be taxing" is now a reality. Great job TinyTax!
Tax used to be a hassle for me. I had to pay to file even though my company is super tiny. Tiny tax is a godsend for me.
Why Choose TinyTax?
File Your Way
File accounts only, CT600 only, or submit both to Companies House and HMRC in one go.
Quick & Simple
Pre-populated with Companies House data. Just add your figures and submit.
Secure & Compliant
Built to government specifications with proper authentication and secure handling.
More Happy. Tiny Tax.
Corporation tax returns shouldn't ruin your week. We've stripped away the jargon, automated the calculations, and made filing so fast you might actually enjoy it. Well, almost.
Built on Experience
TinyTax is Tim Fouracre's newest venture. After the cloud boom with Clear Books and the fintech wave with Countingup, he's now using AI for more happy, tiny tax.
Tim founded Clear Books in 2008. It provides simple accounting software to thousands of small businesses and was first to offer online VAT filings in the UK.
Tim founded Countingup in 2017. It provides business banking to over 100,000 UK small businesses and has processed over £10 billion in customer transactions.
Perfect for Accounting Firms
TinyTax streamlines the preparation and filing of micro-entity accounts and corporation tax returns for multiple clients.
Free for dormant filings, just £50/year unlimited for trading companies
Manage all your clients in one place with ease
Import trial balances from Excel or CSV to auto-populate client returns
Manage your team
What does TinyTax cost?
TinyTax is free for dormant companies. For trading companies, it's just £10 per filing - or £50/year for unlimited filings. Unlike other CT600 software that charges £45-200 per submission, TinyTax provides professional-grade tax and accounts filing at a fraction of the cost.
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.
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 an affordable alternative that's even better - free for dormant companies, and just £10 per filing for trading companies.
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.
Is the software HMRC and Companies House compliant?
Yes, TinyTax is fully compliant with HMRC and Companies House requirements. All submissions go directly through official government gateways.
Who is TinyTax designed for?
TinyTax is built for UK micro-entity limited companies. To qualify, your company must meet two of: turnover under £1m, balance sheet under £500k, or fewer than 10 employees. Perfect for freelancer companies, contractors, and single-director businesses. We don't currently support R&D credits, director's loans, group structures, or complex loss reliefs.
Ready to File?
Join thousands of businesses who've simplified their corporation tax filing with TinyTax.
Get Started - It's Free