CT600FilingSwift Catalyst Ltd
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Related Products
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CT600Filing:
About
CT600Filing is online Corporation Tax filing software for UK limited companies, directors and accountants. A guided, step-by-step process helps you prepare your CT600 and iXBRL accounts, then file the return with HMRC and the accounts with Companies House from one account.
Corporation Tax, including marginal relief, is calculated as you go, and errors are checked before you submit. Every submission is tracked, with HMRC’s response and a PDF of the return to download.
Supports dormant, FRS 105 micro, FRS 102 Section 1A small and full FRS 102 accounts, for periods up to 18 months.
Prepare free and pay only when you submit. Prices start at £49 + VAT for a nil CT600 with dormant accounts. Companies House filing is included on every plan. No subscription, nothing to install, and free amendments to the same return.
Accountants get white-label filing under their practice name, one dashboard for all clients, CSV trial balance import and credit bundles from £10.99 per filing.
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MTDKit:
About
MTDKit is a cloud tax-recording and filing application for UK sole traders, landlords, limited companies and accountants. Users maintain digital income and expense records, import bank and letting-agent data by CSV, track mileage, and generate financial reports. It supports Making Tax Digital (MTD) Income Tax quarterly updates and final declarations, MTD VAT returns filed directly with HMRC, and separate Corporation Tax CT600 returns with iXBRL accounts. Users review and approve submissions before filing. A public expense checker compares costs with HMRC guidance. Accountants can access delegated client accounts; the All-Inclusive plan includes a multi-client dashboard. A free account supports record keeping and CSV imports; paid subscriptions and per-submission fees apply to filing features. MTDKit is designed for UK tax reporting and does not provide Open Banking feeds.
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CT600Filing:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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MTDKit:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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CT600Filing:
Audience
UK limited companies, accountants, sole traders acting through limited companies, and tax professionals.
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MTDKit:
Audience
UK sole traders, landlords, limited companies, VAT-registered businesses and accountants
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CT600Filing:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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MTDKit:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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CT600Filing:
API
Offers API
Not Supported
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MTDKit:
API
Offers API
Not Supported
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CT600Filing:
Screenshots and Videos |
MTDKit:
Screenshots and Videos |
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CT600Filing:
Pricing
£49/filing
CT600Filing starts from £49 + VAT per return. Prepare free, pay when you file. No subscription.
All plans include CT600 filing to HMRC and accounts submission to Companies House: Dormant & Nil Return – £49 + VAT: Nil CT600 to HMRC and dormant accounts filing to Companies House. Micro Company – £79 + VAT: CT600, FRS 105 iXBRL accounts and Companies House filing. Small Company – £159 + VAT: CT600, FRS 102 Section 1A iXBRL accounts and Companies House filing. Medium & Large – £299 + VAT: CT600, full FRS 102 accounts and Companies House filing. Each payment covers one return, with unlimited amendments for that return. Returns are submitted directly to HMRC, and accounts are filed with Companies House. Accountants and bookkeepers: Filing credits start at £399 + VAT for 10 filings, reducing to £10.99 per filing with the 100-credit bundle. Credits are valid for 12 months. No monthly subscription. Prepare your return free and pay only when ready to submit.
Free Version
Not Supported
Free Trial
Not Supported
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MTDKit:
Pricing
£0
A free account includes digital records and CSV imports. Pay as you go: VAT returns £3 per submission (first submission free) and CT600 returns £15 per submission. The ITSA plan is £2.99/month or £24/year; VAT and CT600 fees still apply. All-Inclusive is £9.99/month or £99/year and includes VAT and CT600 submissions, subject to monthly fair-use caps. No setup fee; prices include VAT. From December 1, 2026, new subscriptions are £5.99/month or £59/year for ITSA and £12.99/month or £129/year for All-Inclusive; existing subscriptions retain their price while active.
Free Version
Supported
Free Trial
Not Supported
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CT600Filing:
Reviews/
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MTDKit:
Reviews/
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CT600Filing:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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MTDKit:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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CT600Filing:
Company InformationSwift Catalyst Ltd
Founded: 2026
United Kingdom
www.ct600filing.co.uk
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MTDKit:
Company InformationMTDKit
Founded: 2021
United Kingdom
mtdkit.com
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CT600Filing:
Alternatives |
MTDKit:
AlternativesNo Alternatives
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CT600Filing:
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CT600Filing:
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CT600Filing:
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CT600Filing:
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MTDKit: | |||||
CT600Filing:
Categories |
MTDKit:
Categories |
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CT600Filing:
Corporate Tax Features
Compliance Management
Not Supported
Data Import / Export
Supported
Data Verification
Supported
Electronic Filing
Supported
Exception Notification
Not Supported
For Nonprofits
Not Supported
For Partnerships
Not Supported
K-1 Reporting
Not Supported
Payroll & Employer Forms
Not Supported
Status Tracking
Supported
Tax Planning
Not Supported
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CT600Filing:
Integrations
No info available.
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MTDKit:
Integrations
No info available.
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CT600Filing:
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MTDKit:
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