For high earners splitting the year
Which country actually taxes you?
You spend the year across two or three places and assume the days add up in your favour. Tax residence is not a leaderboard, and 'under 183 everywhere' is not the safe harbour it sounds like.
What you’re up against
The 183-day myth
Staying under 183 days in each place feels safe. But a permanent home, your family, or your centre of vital interests can make a country your tax residence well before the day count ever gets there.
Dual residency
Two countries can each conclude you are resident. Then a treaty tie-breaker decides, scored on facts you did not know were being weighed: where your home is, your economic centre, your habitual abode.
Advice that only looks backwards
Your accountant files what already happened. Nobody is helping you design the year forwards so the exposure never arises in the first place.
Creating a tax home by accident
Rent a flat, bring a partner, keep a car somewhere, and you may have created a default tax residence you never chose and cannot easily shake off.
How this works for you
See who taxes you, and why
The design names the likely tax residence for each configuration and the reason behind it (days, a permanent home, family ties), not just a number on a page.
Design your split→The true multi-country year
The builder is the one calendar that checks Schengen 90/180, each country's residency trigger and citizenship presence at the same time, across as many countries as you split across, not capped at two.
Build the year→The tie-breaker, made legible
Where two countries both claim you, the design surfaces the factors a treaty would weigh, so you can arrange the year deliberately instead of discovering the answer at filing time.
Fast tools to pressure-test a plan
The tools suite has the Schengen 90/180 counter, the 183-day tracker and a take-home-pay comparison, so you can gut-check a plan in minutes before committing to it.
Open the tools→
A worked example
170 days in Spain, 120 in Thailand, the rest in transit
Sample data, verification pending.
220k a year, fully remote, no company to worry about. The plan: 170 days in Spain, 120 in Thailand, the balance travelling. Under 183 in both. Job done, you think.
Except Spain does not only count days. If your partner lives in Spain, or your economic interests centre there, Spain can treat you as resident on family and interests alone, no 183 required, and it grants no split-year to soften the first year. Meanwhile Thailand's foreign-income remittance rules are shifting underneath the other 120 days. 'Under 183 everywhere' has quietly become 'resident in Spain, on your full income'.
The builder shows the Spanish residence flag lighting up below the day threshold, which is exactly the point at which a plan needs to change. Figures shown are sample data.
See what could actually work for you.
A portfolio of designed setups, not a country ranking. Structured planning and decision support you take into a professional consultation, explicitly not legal or tax advice.