---
description: Review of CT600Filing Software: system overview, features, price and cost information. Get free demos and compare to similar programs on Software Advice New Zealand.
image: https://gdm-localsites-assets-gfprod.imgix.net/images/software_advice/og_logo-55146305bbe7b450bea05c18e9be9c9a.png
title: CT600Filing | Reviews, Pricing & Demos - SoftwareAdvice NZ
---

Breadcrumb: [Home](/) > [Corporate Tax Software](/directory/4282/corporate-tax/software) > [CT600Filing](/software/565432/CT600Filing)

# CT600Filing

Canonical: https://www.softwareadvice.co.nz/software/565432/CT600Filing

> CT600Filing is HMRC-recognised software that lets any UK limited company file its CT600 Corporation Tax return, generate fully tagged iXBRL company accounts, and submit to HMRC and Companies House — all from one online account.

When HMRC and Companies House permanently closed their free joint filing service (Company Accounts and Tax Online, CATO) on 31 March 2026, every UK company became required to file with recognised commercial software. CT600Filing was built as a simple, affordable replacement: a guided form takes directors through every CT600 box — trading profits, capital allowances, R\&D credits and more — with the Corporation Tax liability calculated automatically as they go. The platform generates FRS-102 and FRS-105 compliant iXBRL accounts automatically, or accepts an uploaded iXBRL file, and submits via the HMRC Online Services gateway and the Companies House XML Gateway with instant digital acknowledgement.

Unlike subscription products, CT600Filing charges one payment per accounting period: £49 + VAT for dormant and nil returns, £79 + VAT for micro-entities (CT600 + iXBRL + Companies House), £159 + VAT for small companies and £299 + VAT for medium and large — each including unlimited amendments and re-filings, a differentiator competing products charge again for. Accountants buy filing-credit bundles from £10.99 per filing and manage a full client portfolio from a multi-company dashboard with audit trail.

The site also offers free, no-sign-up tax calculators (Corporation Tax with marginal relief, dividend vs salary, VAT, income tax, stamp duty and take-home pay) and a guides handbook covering deadlines, iXBRL tagging and Companies House filing. CT600Filing is a service of Swift Catalyst Ltd (Company No. 17130521).
> 
> Verdict: Rated **5.0/5** by 1 users. Top-rated for **Likelihood to recommend**.

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## Quick Stats & Ratings

| Metric | Rating | Detail |
| **Overall** | **5.0/5** | 1 Reviews |
| Ease of Use | 5.0/5 | Based on overall reviews |
| Customer Support | 5.0/5 | Based on overall reviews |
| Value for Money | 5.0/5 | Based on overall reviews |
| Features | 5.0/5 | Based on overall reviews |
| Recommendation percentage | 100% | (10/10 Likelihood to recommend) |

## About the vendor

- **Company**: CT600Filing

## Commercial Context

- **Starting Price**: £49.00
- **Pricing model**: Flat Rate (Free version available)
- **Target Audience**: Self Employed, 2–10, 11–50
- **Deployment & Platforms**: Cloud, SaaS, Web-based
- **Supported Languages**: English
- **Available Countries**: United Kingdom

## Features

- Alerts/Notifications
- Compliance Management
- Corporate/Business
- Electronic Filing
- Status Tracking
- Tax Calculation
- Tax Compliance
- Tax Filing
- Tax Forms
- Tax Management

## Support Options

- Email/Help Desk
- Knowledge Base

## Category

- [Corporate Tax Software](https://www.softwareadvice.co.nz/directory/4282/corporate-tax/software)

## Reviews

### "The best Support" — 5.0/5

> **David** | *14 October 2026* | Accounting | Recommendation rating: 10.0/10
> 
> **Pros**: OMG the support was amazing.  I had like an accountant who helped correct the mistake that I had done.  Really a good software
> 
> **Cons**: There are a lot of fields to fill in but it is not the software fault.  this is down to HMRC and all the fields there have got on there ct600
> 
> Amazing easy to use software.  The Support was Excellent.  I would 100% Recommend this to all my friends to use

## Links

- [View on SoftwareAdvice](https://www.softwareadvice.co.nz/software/565432/CT600Filing)

## This page is available in the following languages

| Locale | URL |
| en | <https://www.softwareadvice.com/product/565432-CT600Filing/> |
| en-AU | <https://www.softwareadvice.com.au/software/565432/CT600Filing> |
| en-GB | <https://www.softwareadvice.co.uk/software/565432/CT600Filing> |
| en-IE | <https://www.softwareadvice.ie/software/565432/CT600Filing> |
| en-NZ | <https://www.softwareadvice.co.nz/software/565432/CT600Filing> |

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