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. £28/year for eligible active micro-entity companies using FRS 105. Check the accounts standard and supported filing route before buying. No per-filing surcharges for supported filings while your subscription is active.
CHOOSE YOUR PLAN
Pay for exactly what you file.
Dormant and trading companies have different filing requirements, so we price them separately. Personal prices include VAT. Practice prices exclude VAT. VAT added at checkout where it applies. 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 filings, amendments and supported periods for this company
- 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.
£8.33 + £1.67 VAT (£10 total)
Most companies
Micro-entity
Eligible active micro-entity company filing under FRS 105
£28 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 filings, amendments and supported periods for this company
- 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 £28 unless cancelled.
£23.33 + £4.67 VAT (£28 total)
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. We generate both.
£28 · Micro-entity
Designed for eligible UK micro-entities using FRS 105.
For periods beginning on or after 6 April 2025, the size test uses at least two of three limits: annual turnover no more than £1,000,000, balance sheet total no more than £500,000 and an average of no more than 10 employees. Adjust turnover for the accounts-period length and apply the qualifying-year rules and exclusions. Read the full micro-entity test →
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)
£28 / 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 filings and amendments
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.
Document preparation and supported filings are included in your plan. For CICs, this includes the CIC34 report and downloadable Companies House package when selected. You upload the ZIP yourself and pay Companies House its separate filing fee.
See how to prepare and download your CIC package → The Companies House £15 upload fee is paid separately to Companies House.
iXBRL statutory accounts
FRS 105 micro-entity format (£28) 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 are included in the £28 micro-entity plan.
Unlimited filings and amendments
File supported accounting periods and correct or amend filings for the same company throughout the annual subscription. No per-filing 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.
Unincorporated club filing
The personal subscription is £28 / year for an unincorporated members’ club or registered CASC. It includes full, partial and no-claim returns, long periods and amendments within the supported scope. A practice workspace uses its existing filing allowance.
This service files with HMRC only. You supply your prepared figures and PDF or iXBRL accounts, or explain why accounts are omitted. We do not generate club accounts or file them with Companies House. Read the club filing guide.
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?
Companies House dormancy means no significant accounting transactions, subject to the statutory exceptions. HMRC dormancy is a separate question. Micro-entity size uses at least two of three conditions: turnover, balance sheet total and employees. Apply the thresholds for the period and the qualifying rules. Read the linked eligibility guide before choosing the route.
What if my company was dormant last year and is trading this year?
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 lets the software handle computation, validation and filing automatically. We don't employ accountants to review each return manually, and we pass those savings on.
Are there any additional charges?
No. One annual subscription includes unlimited filings, amendments and supported accounting periods for that company while the subscription is active. There are no per-filing surcharges, premium add-ons or 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. Select Manage billing in the top navigation, then cancel the subscription in the secure Stripe billing portal. This stops the next annual payment, and you keep access until the end of the period you have already paid for.
What if I have multiple companies?
On these personal plans each company needs its own subscription, priced per company type (£10 dormant or £28 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 +VAT 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 for HMRC and Companies House.