Who it is for
A UK freelancer, sole trader, or landlord handling their own self assessment and MTD timing.
TaxHeaven
UK self-employed tax calculations and Making Tax Digital checks
Overview
What TaxHeaven does
TaxHeaven answers UK tax questions for freelancers, sole traders, self employed workers, and landlords, using rates published by HMRC. Eight tools sit behind it.
The sums cover National Insurance, income tax, and take home pay for both England and Scotland, plus payments on account and a monthly figure to set aside. VAT is handled separately: adding or removing it, comparing the Flat Rate Scheme, and checking registration thresholds. Capital allowances on equipment and vehicles are worked out, and individual expenses can be tested for deductibility against HMRC rules.
Beyond the arithmetic, it checks whether Making Tax Digital applies and when it begins, lists deadlines with countdowns, and scans receipts into categories. Rates span 2024-25 through 2026-27. There is no sign-up, and the developer states that no data is stored.
What stands out
It pairs the arithmetic with the compliance calendar, including whether and when Making Tax Digital starts to apply.
Availability
Where TaxHeaven is listed
TaxHeaven is listed in the ChatGPT apps directory only. TaxHeaven Ltd has no connector under the same domain in the Claude directory; 392 of the 3,150 products here are on both marketplaces, and this is not one of them.
ChatGPT apps are built on MCP, and the same server can back a Claude connector, so the absence is a distribution decision rather than a technical one.
ChatGPT listing
In the ChatGPT apps directory
- Developer
- TaxHeaven Ltd
- Filed under
- Finance
- Listed since
- June 2026
- Authentication
- Authenticates when installed
- Website
- taxheaven.app
- Policies published
- Privacy policy · Terms of service
- Official listing
- Open in ChatGPT
- Snapshot
- August 2026
Example prompts from the listing
- I'm self-employed in the UK earning £65k a year. What's my tax bill ?
- I'm a freelancer earning £55,000 a year. Do I need to use Making Tax Digita
- 🧾 Scan and categorise this receipt for my tax records
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This is an independent catalogue entry compiled by Node8 from TaxHeaven's public marketplace listing as it stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with TaxHeaven Ltd, and inclusion here is not an endorsement.
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