CT600 XML
Full HMRC Corporation Tax schema v3. Submitted via Government Gateway with IRmark receipt.
Pricing
Two simple prices. Pick what matches your company.
£10/year for dormant companies. £25/year for trading companies with turnover under £1m and fewer than 10 employees. No tiers within tiers, no per-filing surcharges, no upsells. Our focused scope lets us automate 99% of the work and pass the efficiency straight to you.
CHOOSE YOUR PLAN
Pay for exactly what you file.
Dormant and trading companies have very different filing requirements — so we charge accordingly. Either way, everything you need to submit to HMRC and Companies House is included.
Dormant filings
Dormant company
No trading activity during the period
£10 per company, per year
- Dormant Companies House accounts (AA02-equivalent iXBRL)
- Zero-activity CT600 to HMRC
- Balance sheet only — no P&L or tax computation needed
- Direct HMRC + Companies House submission
- Unlimited revision generations until you submit
- Guided wizard with plain-English explanations
- Companies House data auto-populated via API
- AES-256 secure data storage
- Downloadable CT600 XML, iXBRL accounts, and PDF summary
Renews annually at £10 unless cancelled.
Most companies
Micro-entity
Trading company with turnover under £1m, fewer than 10 staff filing under FRS 105
£25 per company, per year
- Full FRS 105 statutory accounts (P&L + balance sheet + notes)
- CT600 with complete tax computation — including marginal relief
- Fiscal-year apportionment for accounting periods spanning 1 April
- iXBRL tax computation (the "computations" attachment HMRC expects)
- Direct HMRC + Companies House submission
- Unlimited revision generations until you submit
- Guided wizard with plain-English explanations
- Companies House data auto-populated via API
- AES-256 secure data storage
- Downloadable CT600 XML, iXBRL accounts, and PDF summary
Renews annually at £25 unless cancelled.
Both plans cover accounting periods starting on or after 1 April 2015, including overdue returns. HMRC’s filing deadlines and penalties still apply to late returns.
Filing for more than one company?
The plans above are priced per company. If you file for several companies, a Practice plan covers a pool of them for one annual price, with unlimited team members. Built for accountants, bookkeepers and anyone looking after more than one company.
One price per year, not per company.
NOT SURE WHICH?
Dormant or micro-entity?
You pick this in the wizard on Step 1 — if you change your mind you can switch before subscribing. The short version is below.
£10 · Dormant
Your company has had no significant transactions this period.
Typical signs: no sales invoices, no payroll, no bank activity beyond Companies House fees, only share capital on the balance sheet. You'll still need to submit dormant accounts to Companies House and a nil CT600 to HMRC — and we generate both.
£25 · Micro-entity
Designed for UK micro-entities (up to £1m turnover, £500k balance sheet total, and 10 employees).
Includes FRS 105 accounts, CT600 returns, tax computations, marginal relief, and fiscal-year apportionment.
VS THE MARKET
How it compares.
What's included, what it costs, and what it takes. Side by side.
SimpleCompanyTax
Traditional accountant
Other software
Cost (dormant)
£10 / year
£150 – £400 / year
£20 – £50 / year
Cost (trading micro-entity)
£25 / year
£400 – £800 / year
£50 – £120 / year
CT600 + iXBRL
Included
Included
Varies by tier
Speed
Same day
2 – 4 weeks
Same day
Marginal relief
Automatic
Manual calculation
Varies
Unlimited revisions
Yes
Usually charged extra
Varies
24/7 availability
Yes
Business hours
Yes
Data portability
Full XML download
Usually PDF only
Varies
WHAT'S INCLUDED
The full stack in both plans.
Dormant plans skip the P&L and tax computation because dormant accounts don't need them — not because they're an upsell. Everything HMRC and Companies House require for your filing type is in the price.
iXBRL statutory accounts
FRS 105 micro-entity format (£25) or dormant AA02-equivalent (£10), tagged against the FRC taxonomy and accepted by Companies House.
Tax computation
Corporation tax, marginal relief, capital allowances, and fiscal-year apportionment — included in the £25 micro-entity plan.
Unlimited revisions
Regenerate as many times as you like before filing. No per-action charges.
Data portability
Download your CT600 XML, iXBRL accounts, and computation files at any time.
Secure storage
AES-256 encryption at rest. TLS 1.2+ in transit. UK GDPR-compliant retention.
PRICING FAQ
Frequently asked questions about pricing.
Why two prices? Isn't it all just "filing"?
Dormant filings and trading micro-entity filings are genuinely different: a dormant return has no P&L, no tax computation, no fiscal-year apportionment, and a shorter set of iXBRL tags. It's fairer (and cheaper for you) to price each accordingly than to average them into one number.
How do I know if my company is dormant or a micro-entity?
Dormant = no significant transactions during the accounting period. Micro-entity = a small trading company that meets at least two of these conditions: turnover up to £1 million, balance sheet total up to £500,000, and no more than 10 employees. The wizard asks this on Step 1 and automatically adapts the filing journey based on your answer.
What if my company was dormant last year and is trading this year?
No problem — you pick the plan that matches this filing year at checkout. Next year you'll pick again. We don't lock you into a tier.
Why is it still so cheap compared to an accountant?
Our focused scope allows us to automate 99% of the computation and filing logic. We don't employ accountants to review each return manually — the software handles validation and HMRC schema compliance automatically, and we pass those savings on.
Are there any additional charges?
No. Each plan covers everything listed above for that company type. No per-filing surcharges, no premium add-ons, no hidden fees.
What payment methods do you accept?
All major credit and debit cards (Visa, Mastercard, Amex) via Stripe. We never see or store your card details.
Can I cancel anytime?
Yes. Your subscription renews annually and you can cancel at any time from your account; you keep access until the end of your billing period.
What if I have multiple companies?
On these personal plans each company needs its own subscription, priced per company type (£10 dormant or £25 for an eligible trading company). If you file for several companies, our Practice plans cover a pool of companies for one annual price, from £80 a year for 5 companies.
Is there a free trial?
You can create an account, add your company, and step through the entire wizard before paying. Payment is required when you want to generate filing-ready documents for submission.
Do you offer refunds?
If you're not satisfied, contact support and we'll work with you to resolve the issue.
Start your filing from £10.
Dormant or trading company — one flow, HMRC + Companies House.