Average Ratings 0 Ratings

Total
ease
features
design
support

No User Reviews. Be the first to provide a review:

Write a Review

Average Ratings 1 Rating

Total
ease
features
design
support

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

Spectrum is a combination Zen Income Tax Auditor Edition and Zen e– TDS, Zen Service tax, Zen Document Manager, Zen Report / CMA Zen Form Manager & Zen e– AIR. Computation of income and tax thereon, including set off losses, deductions, clubbing minor's income, rebates, etc. The detailed instructions for the computation of trust, non-residents and foreign companies have been included. Manual and automatic calculation of interest under 234A, 234B, and 234C. Preparation of return forms, viz. ITR 1 to ITR 7 Preparation of trading, P&L accounts, balance sheets, multiple capital accounts, and statement of affairs. MIS reports viz. Assesses register, filed returns list, pending returns list, returns to prepare, refund. Advance tax estimation report, cases list, and assesses with or without PAN. Client-wise backup and restoration facility. Online e-payment of tax Challans via software directly. No need to fill in master information.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

Screenshots View All

Integrations

No details available.

Integrations

No details available.

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 Yes 

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 No 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows Yes 
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 No 
Webinars Yes 
Live Training (Online) Yes 
In Person Yes 

Vendor Details

Company Name

Swift Catalyst Ltd

Founded

2026

Country

United Kingdom

Website

www.ct600filing.co.uk

Vendor Details

Company Name

KDK Software

Founded

2006

Country

India

Website

www.kdksoftware.com/spectrum.php

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

Corporate Tax

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

Alternatives

BrightTax Reviews

BrightTax

Bright

Alternatives

TaxbasePro Reviews

TaxbasePro

Sinewave
Taxley Reviews

Taxley

Taxley UK LLP
Genius Reviews

Genius

SAG Infotech
BTCSoftware Reviews

BTCSoftware

Bright