Switching from Companies House WebFiling: Step-by-Step

Companies House WebFiling for accounts closed on 31 March 2026. From 1 April 2026 onwards, accounts must be filed in iXBRL format through commercial software. If you previously used WebFiling, here's how to switch.

Confirmation statements (CS01), director and address changes, and other secretarial filings can still be filed through the Companies House website — only the accounts service has been retired.

Before You Start

What You'll Need

• Company registration number
• Companies House authentication code
• Previous years' accounts for reference
• Accounting records for next filing

Choose Your Software

• TinyTax — £20/year + VAT (dormant), £59/year + VAT (one trading company)
• TaxCalc — £100+/year
• IRIS — £200+/year
• Sage — £150+/year

Step-by-Step Switch

Step 1: Create Software Account

1. Visit your chosen software provider
2. Register with company email
3. Verify your account

Step 2: Add Your Company

1. Enter company registration number
2. Software auto-populates company details
3. Verify information is correct

Step 3: Set Up Authentication

1. Enter Companies House authentication code
2. Verify connection to CH systems
3. Test if available

Step 4: Prepare Accounts

1. Enter financial information
2. Software generates iXBRL automatically
3. Review accounts preview

Step 5: Submit

1. Final review of accounts
2. Submit electronically to Companies House
3. Receive confirmation

What's Different from WebFiling?

Timeline

• 31 March 2026: WebFiling for accounts closed
• From 1 April 2026: Accounts must be filed in iXBRL via commercial software
• Other filings (CS01, address changes, etc.): Still available on the Companies House website

Summary

• WebFiling for accounts closed on 31 March 2026
• Switch to commercial software for all future accounts filings
• TinyTax covers accounts and the CT600 from £20/year + VAT
• Confirmation statements and other secretarial filings are unaffected

TinyTax offers affordable accounts filing. Get started →