What RNOR does and does not shelter
Resident but Not Ordinarily Resident is a transitional status in Indian tax law. It exists because someone who has lived abroad for a decade should not be taxed on their entire foreign life the moment they land. It is generous, it is time-boxed, and almost nobody is told about it before they book the flight.
The status, in one paragraph
Indian residence is decided year by year, on days of physical presence, for a financial year that runs 1 April to 31 March. A non-resident is taxed in India only on Indian-source income. A resident and ordinarily resident is taxed on worldwide income. RNOR sits between them: you are resident, but your foreign income stays outside the Indian net — with a narrow exception for income from a business controlled from India or a profession set up here.
How you get it, and how long it lasts
A resident is not ordinarily resident for a year if either of two limbs is satisfied. The first: you were non-resident in 9 of the 10 preceding years. The second: you were in India for 729 days or fewer across the 7 preceding years.
Most explanations stop after the first limb, and conclude that everyone gets exactly two RNOR years. That is not what the section says, and the difference is not academic. The second limb can carry a third year — and it does so precisely for the person who spent the least time in India before returning. Someone who took one long trip home every year may find the second limb already exhausted; someone who barely visited may find it holds a further year open.
Which means the length of the window depends on an input most people have never counted: how many days a year they were actually in India before they returned.
Why the landing date matters
Residence for the year of return usually turns on the 182-day test. Land early enough in a financial year to be present 182 days or more and you are resident for that whole year; land after the cliff and you are non-resident for it, and the clock on the transitional status starts the following April instead.
The cliff falls in early October, and it moves with the calendar — the financial year ending 31 March 2028 contains a leap February, so the threshold sits a day earlier than intuition suggests. One day of difference can move the end of the window by a full financial year.
The RNOR window calculator applies both limbs, year by year, and shows which one decided each year.
What it does not do
It is not a shelter from US tax. A US citizen or green-card holder is taxed by the United States on worldwide income regardless of where they live. What the window removes is the Indian tax that would otherwise have stacked on top — and where a foreign tax credit would have relieved much of that stacking anyway, the real benefit is smaller than the headline Indian figure. Any calculation that quotes Indian tax avoided and stops there is quoting the gross, not the net.
It does not cover Indian income. Rent from Indian property, interest from Indian deposits, gains on Indian securities — all taxable throughout, at every residence status.
It is not a filing exemption. Reporting obligations on both sides are unaffected by it, and several of them are unforgiving about lateness.
Two things worth knowing before the date is fixed
The first is that Indian-source income above ₹15 lakh in the year of return brings an additional 120-day limb into play for a citizen or person of Indian origin coming on a visit — and whether a person returning to settle is “on a visit” is argued both ways.
The second is that the window is a period, not an event. It opens on a date decided by a day count and closes on a 31 March decided by two statutory limbs. What happens inside it is a question about order and timing, and that question is where a qualified adviser in each jurisdiction earns their fee.