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features
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Description

CT600Filing is a web-based software solution designed for UK limited companies and accounting firms to facilitate the filing of Corporation Tax returns. It provides a step-by-step process for completing a CT600 return, automatically calculating the Corporation Tax as data is entered, and accommodating additional schedules such as capital allowances and R&D claims. The platform can create iXBRL accounts compliant with FRS 102 or FRS 105, or it can accept accounts prepared by other means, and it efficiently submits CT600 returns to HMRC along with annual accounts to Companies House through their respective filing gateways. Users have the flexibility to prepare their returns before making any payments, with straightforward pricing options for each accounting period and various plans tailored to company size; there are also credit bundles available for accountants. The software includes a multi-company workspace that tracks filing statuses, deadlines, and submission histories for various client or group entities. Functioning entirely online without the need for desktop installation, it caters not only to company directors but also to bookkeepers, accountants, and tax professionals engaged in UK Corporation Tax submissions. With its user-friendly interface and comprehensive features, CT600Filing simplifies the tax filing process for all involved parties.

Description

IRIS CARBON is an advanced cloud-based platform designed for managing disclosures and regulatory reporting, enhancing the processes of creating, reviewing, validating, tagging, and submitting intricate financial and non-financial documents, including Annual Financial Reports, ESG disclosures, SEC/EDGAR filings, ESEF/XBRL/iXBRL submissions, FERC reports, ACFR filings, and various other required digital disclosures across different global taxonomies and jurisdictions, all within a unified collaborative space. By automating the collection of data, implementing structured tagging, and conducting quality checks, it boosts both accuracy and transparency of the information presented. The platform fosters collaboration through role-based access and version control while seamlessly integrating with commonly used applications like Word, Excel, and PowerPoint, which aids teams in minimizing reliance on manual spreadsheets, cutting down on errors, and streamlining iterative review processes. Additionally, IRIS CARBON offers specialized modules tailored for ESG reporting that comply with significant frameworks such as GRI, SASB, TCFD, and CSRD/ESRS, thus supporting centralized compliance workflows. This comprehensive approach not only simplifies complex reporting tasks but also enhances the overall efficiency of financial and sustainability reporting.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

Microsoft Excel No 
Microsoft PowerPoint No 
Microsoft Word No 

Integrations

Microsoft Excel Yes 
Microsoft PowerPoint Yes 
Microsoft Word Yes 

Pricing Details

£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 Trial No 
Free Version No 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours Yes 
Live Rep (24/7) Yes 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars Yes 
Live Training (Online) Yes 
In Person No 

Vendor Details

Company Name

Swift Catalyst Ltd

Founded

2026

Country

United Kingdom

Website

www.ct600filing.co.uk

Vendor Details

Company Name

IRIS CARBON

Founded

2005

Country

United States

Website

iriscarbon.com

Product Features

Corporate Tax

Compliance Management No 
Data Import / Export Yes 
Data Verification Yes 
Electronic Filing Yes 
Exception Notification No 
For Nonprofits No 
For Partnerships No 
K-1 Reporting No 
Payroll & Employer Forms No 
Status Tracking Yes 
Tax Planning No 

Product Features

Compliance

Archiving & Retention Yes 
Artificial Intelligence (AI) Yes 
Audit Management Yes 
Compliance Tracking Yes 
Controls Testing Yes 
Environmental Compliance Yes 
FDA Compliance No 
HIPAA Compliance No 
ISO Compliance No 
Incident Management No 
OSHA Compliance No 
Risk Management No 
Sarbanes-Oxley Compliance No 
Surveys & Feedback No 
Version Control Yes 
Workflow / Process Automation Yes 

ESG

Activity Dashboard Yes 
Analytics/Reporting No 
Audit Management Yes 
Benchmarking No 
Compliance Management Yes 
Data Visualization No 
Document Management Yes 
Performance Metrics Yes 
Risk Assessment Yes 

Financial Reporting

"What If" Scenarios No 
Audit Trail No 
Balance Sheet No 
Cash Management No 
Consolidation / Roll-Up No 
Forecasting No 
General Ledger Yes 
Income Statements Yes 
Multi-Company No 
Multi-Department / Project Yes 
Profit / Loss Statement Yes 

GRC

Auditing Yes 
Disaster Recovery No 
Environmental Compliance Yes 
IT Risk Management No 
Incident Management No 
Internal Controls Management No 
Operational Risk Management No 
Policy Management No 

Sustainability

Audit Management Yes 
Benchmarking Yes 
Compliance Management Yes 
Corrective Actions (CAPA) No 
Emissions Management Yes 
Employee Training No 
Energy Management Yes 
Incident Management No 
KPIs No 
Performance Metrics No 
Stakeholder Engagement No 
Supplier Management No 
Waste Management No 

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