Tax Filing & Returns in United Kingdom
Preparation and filing of the Company Tax Return (CT600) with iXBRL accounts and computations, and of the periodic VAT return. The CT600 is filed 12 months after the end of the Corporation Tax accounting period, but the tax is payable 9 months and 1 day after the period end — the payment deadline falls BEFORE the filing deadline. Corporation Tax is charged at the 25% main rate on profits over £250,000 and the 19% small profits rate on profits up to £50,000, with Marginal Relief in between; the limits are divided by the number of associated companies and reduced for short accounting periods (rates for financial years from 1 April 2023). Large companies pay by quarterly instalments — the instalment thresholds come from the Instalment Payments Regulations and are confirmed at quote, not stated here. VAT returns are usually quarterly (some monthly or annual) and both the return and the payment are due 1 calendar month and 7 days after the end of the VAT accounting period; every VAT-registered business is now signed up for Making Tax Digital and must file through MTD-compatible software.
3–10 business days
GBP
What we will need from you
Upload these once. They are stored encrypted and reused across every service you buy from us.
Statutory accounts for the period, tagged in iXBRL
Sales, purchase and bank records and the tax computations
Digital VAT records held in MTD-compatible software
Where VAT registered.
HMRC notice to deliver a Company Tax Return (CT603), where issued
Cost breakdown
Our fee and the government’s are always separate lines. Government fees are passed through at exactly what the authority charges — we add nothing to them.
| HMRC filing feeHMRC publishes no fee for filing a CT600 or a VAT return; the 10-Sep-2026 research rendered the deadline pages but no fee schedule, so no amount — including zero — is asserted. The tax itself is separate: Corporation Tax is due 9 months and 1 day after the period end (25% over £250,000, 19% up to £50,000, Marginal Relief between), and VAT is due with the return 1 month and 7 days after the period end. | Confirmed before payment |
| Comriq professional fee | Fixed fee within 1 business day |
How it runs
You will see these exact stages update in your client portal as we progress.
Records Received
Accounting records, ledgers and digital VAT records collected and reconciled.
Return Prepared
CT600 with iXBRL accounts and computations, or the periodic VAT return, drafted and reviewed — including the Marginal Relief calculation where profits fall between £50,000 and £250,000.
Your Approval
You review and sign off.
Filed with HMRC
Submitted — the CT600 within 12 months of the period end, the VAT return through MTD-compatible software 1 month and 7 days after the period end. Receipt delivered.
Ready to start?
This one is priced to your situation — most of what we do needs a local filing agent, so we scope it rather than guess. Tell us the specifics and we come back with a fixed quote and a confirmed timeline, within one business day.
Not sure this is the right service? A paid expert call is credited against your order.
Verified September 2026
Requirements and statutory fees are set by HMRC — Company Tax Return (CT600) and VAT under Making Tax Digital and change without notice. This page is general information, not legal or tax advice. Your engagement letter and quote are the binding documents.