CT600Filing

CT600Filing

Swift Catalyst Ltd
CT600Filing MTDKit

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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.
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.
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
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
CT600Filing:

Audience

UK limited companies, accountants, sole traders acting through limited companies, and tax professionals.
MTDKit:

Audience

UK sole traders, landlords, limited companies, VAT-registered businesses and accountants
CT600Filing:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
MTDKit:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
CT600Filing:

API

Offers API Not Supported
MTDKit:

API

Offers API Not Supported
CT600Filing:

Screenshots and Videos

MTDKit:

Screenshots and Videos

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
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
CT600Filing:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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MTDKit:

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

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CT600Filing:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
MTDKit:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
CT600Filing:

Company Information

Swift Catalyst Ltd
Founded: 2026
United Kingdom
www.ct600filing.co.uk
MTDKit:

Company Information

MTDKit
Founded: 2021
United Kingdom
mtdkit.com
CT600Filing:

Alternatives

Taxley

Taxley

Taxley UK LLP
MTDKit:

Alternatives

No Alternatives
CT600Filing:
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CT600Filing:
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CT600Filing:
CT600Filing:
Alphatax

Alphatax

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MTDKit:
CT600Filing:

Categories

Corporate Tax Supported
MTDKit:

Categories

Tax Compliance Supported
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
CT600Filing:

Integrations

No info available.
MTDKit:

Integrations

No info available.
CT600Filing:
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