Company / Why Polyconomic
You should not need to pay a subscription just to find out if you owe any tax.
That is the belief behind Polyconomic. It sounds simple, but almost no other crypto tax tool operates this way.
The problem
The crypto tax industry has the incentives backwards.
Most crypto tax tools were built to maximise subscription revenue. The business model depends on you not knowing your tax position until you have already paid. You pay £100, £150, £200 a year before seeing a single number. Then, to get the actual report you need to file, you often pay again.
For the majority of UK crypto holders — people who bought Bitcoin or Ethereum, maybe traded occasionally, held through a bull run — this is a terrible deal. They might be £50 above the annual allowance, or £500 below it. The difference in what they need to do is enormous. But they cannot find out without paying first.
The most common outcome we hear from people who have used other tools: they paid £150 for the year, found out they owe nothing, and never needed the report at all.
The question you should be able to answer for free
“Am I above or below the £3,000 CGT allowance, and do I owe anything?” — This should cost you nothing to find out. It is your data and your tax position.
So we built Polyconomic to answer that question for free. Import your transactions. We apply HMRC's rules. You see your taxable gain. If it is nil, you pay us nothing. If you need the official report to file your Self Assessment, Standard is £49 a year — covering every tax year in your history.
What we stand for
Five things we will not compromise on.
The calculation is free
Always. Not a trial. Not a preview. The full calculation — every tax year, every asset, every gain and loss — is free to view. We make money from the report, not from making the number inaccessible.
Fair pricing. No surprises.
Free to see your gain. Standard is £49 per year for full reports and all tax years. Pro is £99 per year for unlimited transactions, accountant sharing, and CSV export. No hidden fees. No subscription just to see data you already have.
HMRC-correct, not approximate
Same-day matching, the 30-day bed-and-breakfasting rule, Section 104 share pooling — applied in the right order, every time. There is no shortcut version of HMRC's rules. We apply them fully.
Plain English, not tax-speak
Every summary, every figure, every report section is written for a normal person. Not an accountant. If you cannot read your own tax report and understand it, the report has failed. Ours should not need a glossary.
Honest about our limits
We are a calculation tool. We are not regulated tax advisers. If your situation is complex — hard forks, DeFi edge cases, professional trading — we will tell you to seek professional advice. We do not pretend to replace expertise you actually need.
Independent and focused
We are building one product for one market: UK crypto holders who need to understand their HMRC position. No investors pushing us to expand globally before we have got the UK right. No subscriptions artificially bundled to inflate average revenue. Just the tool, done well.
Honesty
What we are — and what we are not.
What we are
- A UK-specific crypto tax calculator
- HMRC matching rules applied correctly
- A plain English report you can file from
- A tool for individuals and accountants
- Free to see your taxable gain
What we are not
- —A registered tax adviser or accountant
- —A substitute for professional advice on complex situations
- —A global tax tool (we do UK only, and we do it properly)
- —A company trying to get you onto a rolling subscription
- —A tool that exaggerates its integrations or certifications
If you have traded on 40 exchanges across five countries, hold complex DeFi positions, or run a business that accepts crypto as payment, you probably need a specialist accountant. We will help you understand your position, and we will tell you clearly when a human expert should take over.
See it for yourself
Free to import. Free to see your gain. No card, no subscription, no strings.