When a firm takes on a portfolio with thousands of transactions across exchanges, wallets and DeFi protocols, the problem isn't a tax problem: it's a data problem. We rebuild the activity and deliver the report to you, together with its criteria memo.
A generalist firm can handle a small, well-organised crypto portfolio without any trouble: four purchases, two sales and one exchange. The work stops being worth it once volume or dispersion comes into play.
The tipping point is usually this: the client brings exports from several platforms, some of them incomplete, with transfers between their own wallets that look like sales and tokens that appeared without them ever buying them. From then on the work is no longer tax work but data processing, which is a different trade and eats up time that is hard to bill for.
And there's a second, less comfortable case: when the Spanish Tax Agency (AEAT) has already opened proceedings and the origin of every figure has to be proven with on-chain evidence.
Approximate volume, platforms involved, tax years affected and whether the AEAT is involved in any way. With that, we tell you whether the case is a fit, how long it will take and what it will cost, before you commit to the client.
We define what is and isn't included, who bills whom, what data we need and in what format the deliverable reaches you. We don't start without this: in data work, an ambiguous scope always ends in a dispute.
We can request the data from the client on your behalf or receive it from you already gathered, whichever you prefer. We never ask for private keys: exports, read-only API keys and public addresses.
We apply the full method. Anything the automated process can't resolve with certainty is set aside and reviewed by hand, and every decision is documented in the criteria memo.
We deliver the report, the criteria memo and the issues log, and hold a session so that you can defend every figure to your client and, if it comes to that, to the tax authorities.
A client whose returns you've been filing for years turns up with a crypto asset portfolio you're not sure how to treat. You don't want to refer them elsewhere entirely or lose them, but you don't want to spend thirty hours cleaning CSVs either. We handle the crypto part and you keep filing their full tax return.
Your client receives an information request over discrepancies between what an exchange reported and their personal income tax (IRPF) return. You handle the proceedings; we rebuild the activity for that tax year and prepare the technical report that accompanies your submissions.
The client arrives with a report from a piece of software showing a gain that doesn't make sense to them. Before it's filed, we review the reconciliation: almost always, internal transfers treated as sales or acquisitions valued at zero cost turn up.
While preparing the current tax year, undeclared activity from previous years comes to light. We rebuild the full history so that you can assess the supplementary return route with real figures in front of you.
Tell us the volume, the platforms, the tax years and whether the AEAT is involved in any way. We'll tell you whether it's a fit, how long it will take and what it will cost before you commit to your client.