TinyTax Alternative: Compare CT600 Filing Software for 2026
With HMRC's free CT600 filing service closing on 31 March 2026, thousands of company directors are looking for affordable alternatives. Here's how the options compare.
Why Look for Alternatives?
After March 2026, you'll need commercial software to file your CT600. The key requirements are:
- HMRC-recognised software that can submit electronically
- iXBRL accounts generation (required by HMRC)
- CT600 tax computation in iXBRL format
- Accurate tax calculation including marginal relief
Feature Comparison
| Feature | Taxpipe | TinyTax | HMRC Free (Closing) |
|---|---|---|---|
| Price | £59 one-off | Subscription | Free (until Mar 2026) |
| CT600 filing | ✅ | ✅ | ✅ |
| iXBRL accounts | ✅ Auto-generated | ✅ | ❌ Basic |
| Tax computation | ✅ Auto-calculated | ✅ | ❌ Manual |
| Marginal relief | ✅ Automatic | ✅ | ❌ Manual |
| FY splitting | ✅ Automatic | ✅ | ❌ Manual |
| Dormant companies | ✅ Quick-file | ✅ | ✅ |
| Subscription | ❌ One-off | Monthly/annual | N/A |
| Support | Help centre + email | None |
Why Directors Choose Taxpipe
1. One-Off Pricing
Most CT600 software charges a monthly or annual subscription — even though you only file once a year. Taxpipe charges £59 per filing. File once, pay once.
2. Everything Automated
Enter your company's income and expenses. Taxpipe calculates:
- Corporation Tax (19% or 25%)
- Marginal relief
- Financial year apportionment
- Capital allowances
3. iXBRL Built In
HMRC requires your accounts and tax computation in iXBRL format. Taxpipe generates these automatically — you don't need to understand iXBRL or buy separate tagging software.
4. HMRC Validated
Every Taxpipe submission is validated against HMRC's schemas before it's sent. If there's an issue, we catch it before HMRC does.
Who Should Use What?
| Situation | Recommendation |
|---|---|
| Single company, simple return | Taxpipe (£59, done in 15 min) |
| Multiple companies, complex returns | Consider full accounting software |
| Dormant company | Taxpipe (£59, done in 5 min) |
| Need accounts prep too | Accounting software + Taxpipe for filing |
Try Taxpipe free — enter your figures, see your tax calculation, pay £59 only when you're ready to file.