How it works
From your figures to a filed return, with everything checked along the way.
Create an account & start a filing
Sign up, then start a new filing. Choose your accounts type — CT600-only, micro (FRS 105) or small (FRS 102 §1A) — and your accounting period.
Enter company, P&L and balance sheet
A guided, saveable wizard captures your company details (CRN, UTR, registered office), your business P&L (income — trading turnover or rental, allowable expenses, finance costs) and a balance sheet. You can leave and resume anytime.
Run the Corporation Tax computation
We derive the taxable profit and Corporation Tax — main rate, small profits rate and marginal relief, adjusted for associated companies and period length, apportioned across financial years — and show a line-by-line schedule you can audit.
Generate & validate iXBRL
We produce the FRS 105/102 accounts and the CT computations as inline XBRL, tagged to the FRC taxonomy, and validate them. Validation fails loudly if anything is wrong.
Declare & pay
Confirm the director declaration (CT600 boxes 975/980/985) and pay the one-off filing fee securely via Stripe — charged before the final filing is produced.
File & keep your records
Submit your CT600 + accounts to HMRC (and, optionally, your accounts to Companies House), then download copies of everything filed. A full audit trail is kept.