01
Bring in the numbers
Find the company, choose the accounting period and enter or import the figures. Core company details are brought in from Companies House so the return starts with the right legal entity and dates.
Company + period
DevelopmentDevelopmentPrepare your accounts, calculate corporation tax and file with confidence — all in one focused workflow.
CT600 & annual accountsFor UK micro-companiesDirect filing in development
Company tax,kept ontrack.
How it works
From figures to filing in three clear steps.
Taxrails is being designed around the way small UK companies actually file: bring in the company and accounting data, review the calculations and documents, then submit from one guided flow.
02
Review the return
Taxrails turns the figures into a corporation tax calculation and filing-ready annual accounts. Review every number, see how the tax has been calculated and resolve anything that needs attention before submission.
CT600 + iXBRL03
File and keep the record
Submit the CT600 to HMRC and the annual accounts to Companies House from the same workflow. Follow each response and keep the filed documents together for the company record.
Two filings · one flowPlanned features
Everything needed to file. Nothing in the way.
The first release is focused on straightforward UK micro-company accounts and corporation tax. Its scope will be tested with early users before launch.
Company data pre-fill
Start with registered name, number, address and accounting dates from Companies House instead of entering the same details again.
Trial balance import
Bring in a trial balance from a spreadsheet and map the figures into a clear accounts and tax workflow.
Corporation tax calculation
Build the CT600 calculation alongside the accounts, with the working shown clearly enough to review before filing.
iXBRL annual accounts
Generate filing-ready micro-entity accounts with the structured tagging required for electronic submission.
Two-authority filing
Handle the Companies House accounts and HMRC corporation tax return together, while keeping each submission status visible.
Documents and history
Keep computations, accounts, acknowledgements and filed copies together, organised by company and accounting period.
Who it's for
Built for straightforward company tax.
Taxrails is for UK micro-companies that need proper filing software without adopting a full bookkeeping suite. It is being shaped around the annual job: turn finished figures into accounts and a corporation tax return, check them carefully, file them and keep the evidence.
The initial release is deliberately narrow. It will focus on straightforward micro-entity accounts and CT600 returns; specialist claims, complex groups and unusual reliefs will stay outside early access until they can be handled with the same clarity.
Company directorsFile for one small company with a guided path and plain-language checks.
ContractorsTurn completed year-end figures into the required accounts and company tax return.
Dormant companiesUse a shorter route for a company with no trading activity during the period.
AccountantsPrepare and track straightforward returns for several small-company clients.
Roadmap
A focused filing service, built in the open.
Taxrails is in development. Join the waitlist for launch updates and the chance to help test the first corporation tax and accounts workflows.
Now
Core company, accounting period, figures and document-generation flows in development.
Next
Private testing of straightforward micro-entity accounts and CT600 preparation with a small early-access group.
Later
Direct filing, submission tracking and a practice view for people managing more than one company.