Your gains follow your residency. Prove where you live.
For active crypto traders and investors, capital-gains treatment is decided by tax residency, not by where the exchange is. Whether you're chasing a zero- or low-CGT residency or trying to avoid being pulled back into a high-tax country, the entire claim rests on one thing: an accurate, defensible count of where you spent your days. Tax Days builds that record.
What you're up against
Capital-gains rates are set by residency, not the exchange
The country that taxes your crypto gains is generally the one you're tax-resident in when you realize them. Move your residency wrong, or fail to prove the move, and gains you thought were tax-free can be reclaimed by your old country.
The non-resident 183-day capital-gains trap
In the US, a non-resident alien who is physically present 183+ days in a calendar year can be taxed at a flat 30% on US-source capital gains, even without a green card or visa status that suggests residency. Day counts decide whether you cross that line.
Your exchange already knows where you said you live
KYC tied your account to a claimed country of residence. If your actual day count contradicts the address on file, that mismatch is exactly what a tax authority looks for when challenging a residency or source-of-gains position.
Claiming a low-CGT residency isn't enough, you have to live there
Registering in a low- or zero-tax jurisdiction means little if you can't show you actually spent the required days there and broke ties with your prior home. Without a contemporaneous log, the burden of proof works against you.
What Tax Days does for you
Counts your days in every country you set foot in, so you know your exact presence in each jurisdiction at any moment.
Warns you before you cross 183 days anywhere, including the threshold that can trigger non-resident capital-gains exposure.
Tracks days in your chosen low-CGT residency so you can prove you met its physical-presence requirement.
Builds the contemporaneous trip log that backs up the residence address on your exchange KYC.
Flags when you're at risk of being treated as tax-resident in two places at once, the setup that triggers double-taxation and tie-breaker analysis.
Exports an audit-ready PDF per country with day counts, trip dates, and rule evaluations to hand to your accountant or tax attorney.
Stays entirely on your iPhone, no servers, no accounts, no on-chain or location data leaving your device. Optional iCloud sync.
The rules you actually need to track
The 183-day rule, explained
The threshold that flips you from visitor to tax resident in most countries, and the line a flat 30% non-resident capital-gains rate can sit behind in the US.
Read the guide →Substantial Presence Test
How the US weights this year and the prior two to decide residency. Cross it and your worldwide gains become reportable, regardless of citizenship.
Read the guide →Closer Connection Exception
Under 183 days this year? You may still claim a closer connection to a low-tax home country, but only with day counts and ties you can document.
Read the guide →Treaty tie-breaker rules
When two countries both claim you as resident, treaty tie-breakers decide which one taxes your gains. Day counts are central to the analysis.
Read the guide →Digital nomad tax guide
Perpetual-traveler and nomad strategies, the myth of being 'tax resident nowhere,' and why a day log is non-negotiable.
Read the guide →Crypto trader residency guide
Choosing a low- or zero-CGT residency, breaking ties with your old country, and proving the move with presence you can defend.
Read the guide →
Free guides and tools
- Guide
Crypto trader residency playbook
The full walkthrough, how residency drives capital-gains treatment, the 183-day trap, and what proof actually holds up.
- Guide
Digital nomad tax guide
For traders living out of a suitcase, residency, day counts, and avoiding accidental tax homes.
- Calculator
Free 183-day rule calculator
Enter your trips and see how close you are to the 183-day line in any country you spend time in.
- Calculator
Substantial Presence Test calculator
Run the three-year US weighted test to check whether you'd be treated as a US tax resident this year.
Common questions
Does my tax residency decide how my crypto gains are taxed?
Generally yes. Most countries tax residents on worldwide gains, so the jurisdiction that claims you as a resident usually claims your trading profits too. Day counts are often the deciding evidence in which country that is.
If I move mid-year, which country taxes my gains?
Often both want to: the year you move is typically a split year, with each side taxing the period you were resident there, and exit taxes or deemed disposals possible on the way out. The exact split turns on dates, which is why a day log matters.
Can I just trade from a zero-tax country?
Only if you genuinely become a tax resident there and stop being one where you left, under each side's own rules. Spending a few months in a low-tax base while keeping your home elsewhere usually leaves your old residency intact. For US citizens, federal tax follows citizenship regardless.
What records should a trader keep besides trades?
A day-by-day location record for every jurisdiction in play. If your residency is ever challenged, the trading history sets the size of the bill; the location record decides who gets to send it.
Trade anywhere. Prove where you're resident.
Tax Days turns your travel into the residency record your accountant and your exchange both expect. £19.99/year, a rounding error next to one mistaxed gain.
