File your CT600 for £59
The simple, affordable replacement for HMRC's free filing service. Sign up for the waitlist and get a 25% discount code on launch day.
Answer simple questions
Our guided wizard asks plain-English questions — no jargon, no accounting knowledge needed.
We compute everything
Corporation tax, iXBRL accounts, and CT600 boxes — all calculated automatically.
Filed with HMRC
One click to submit directly to HMRC. Get your confirmation receipt instantly.
How it works
Answer a few questions
Tell us about your company, income, and expenses. Our guided flow takes about 15 minutes.
We prepare your filing
Taxpipe generates your CT600 return and iXBRL micro-entity accounts automatically.
Submit to HMRC
We file directly with HMRC and you get instant confirmation. Done.
What to expect
Everything you need to file your Corporation Tax return, in one place.
Guided CT600 wizard
Step-by-step form that walks you through every section. No tax knowledge required.
Auto tax computation
We calculate your Corporation Tax automatically — including marginal relief and capital allowances.
iXBRL accounts included
Micro-entity accounts generated in the HMRC-required iXBRL format, ready to file alongside your CT600.
Direct HMRC submission
Submit your CT600 directly to HMRC via Government Gateway. Track the status in real time.
How does Taxpipe compare?
Taxpipe
- ✓File in ~15 minutes
- ✓CT600 + iXBRL accounts included
- ✓Direct HMRC submission
- ✓Money-back guarantee
Accountant
- –Weeks turnaround
- –Back-and-forth emails
- –Ongoing subscription
- –Overkill for simple returns
HMRC free tool
- –Clunky interface
- –No error checking
- –No iXBRL accounts
- –Being retired by HMRC
Simple pricing
One-time fee per CT600 return
- ✓ No subscription
- ✓ No hidden fees
- ✓ Free resubmission if HMRC rejects
- ✓ 100% money-back guarantee
Frequently asked questions
What is a CT600?+
A CT600 is the Corporation Tax return that every UK limited company must file with HMRC, usually within 12 months of the accounting period end. It reports your company's taxable profits, Corporation Tax due, and any reliefs claimed.
Who needs to file a CT600?+
Every UK limited company registered with Companies House must file a CT600 — even if the company made no profit or had no trading activity during the period.
Can I file my CT600 myself without an accountant?+
Yes. If your company is small and straightforward (e.g. a micro-entity), you can file your CT600 yourself using software like Taxpipe. An accountant may be helpful for complex tax situations.
What happens if I file my CT600 late?+
HMRC charges automatic penalties: £100 if 1 day late, another £100 at 3 months, 10% of unpaid tax at 6 months, and a further 10% at 12 months. Interest also accrues on late payments.
Do I need to file accounts with Companies House separately?+
Yes. The CT600 goes to HMRC, but you also need to file annual accounts with Companies House. Taxpipe generates iXBRL micro-entity accounts that satisfy both requirements.
What is HMRC's free filing tool and why is it closing?+
HMRC offered a free online service for filing CT600 returns. This tool is being retired in March 2026, meaning companies will need to use commercial software or an accountant to file.
What does Taxpipe cost?+
Taxpipe charges a one-time fee of £59 per CT600 return. There are no subscriptions, no hidden fees. This includes the CT600, iXBRL micro-entity accounts, and direct HMRC submission.
From our blog
How to File a CT600 Online: Step-by-Step Guide
A complete walkthrough of filing your company tax return with HMRC.
Filing a CT600 for a Dormant Company
Your company hasn't traded — do you still need to file? Yes. Here's how.
Allowable Expenses: The Complete List
Every expense your limited company can claim against Corporation Tax.
Your First Company Tax Return
Just set up a limited company? Here's everything you need to know.
10 Common CT600 Mistakes to Avoid
The most frequent errors directors make — and how to get it right.
CT600 Penalties: What Happens If You File Late?
Late filing penalties, interest charges, and how to avoid them.
Launching soon
Sign up for the waitlist and get a 25% discount code on launch day. No payment until you submit.