Two separate residency tests, run by two separate countries, on two separate calendars. Here's how they actually interact.
The myth to drop first: being out of both the US and India for enough days does not mean you owe zero tax to either country that year. RNOR and the Substantial Presence Test (SPT) are independent tests run by independent tax authorities. Passing one tells you nothing about the other.
RNOR is purely a creation of India's Income Tax Act. It has no legal effect on what the IRS thinks of you. If you're moving back to India from the US, the year you leave is very often a year where the IRS still considers you a US tax resident under the Substantial Presence Test, for the entirety of the period before you were considered to have "given up" that residency, while India simultaneously and separately treats you as RNOR (or even NR, depending on your day count) for its own financial year. Both things can be true for the same person in the same window of time.
The SPT is a US federal test, based on the calendar year (January to December), not India's April-to-March financial year. That mismatch alone is a big source of confusion: the "year" you're evaluating on each side literally doesn't line up. You meet the SPT for a calendar year, and count as a US resident alien for tax purposes, if both of these are true:
That weighting is exactly why leaving partway through the year rarely gets you out of it. If you spent close to a full year in the US in each of the two years before you left, the 1/3 and 1/6 contributions from those years alone are often already close to or over 183, before you count a single day of the departure year itself.
Say someone was in the US on H-1B, present essentially the full year in both 2024 and 2025, and moves back to India partway through 2026.
| Year | Days present in US | Weight | Weighted days |
|---|---|---|---|
| 2026 (current year, left mid-June) | ~165 | ×1 | ~165 |
| 2025 (prior year) | ~365 | ×1/3 | ~122 |
| 2024 (year before that) | ~365 | ×1/6 | ~61 |
| Weighted total | ~348 | ||
348 is well past the 183-day threshold, and they'd already cleared the 31-day-in-current-year minimum before leaving. They meet the SPT for 2026 despite only spending about half that calendar year physically in the US. Meanwhile, if they landed in India in mid-June 2026, that's roughly 289 days remaining in India's FY 2026-27 (which runs to March 31, 2027), comfortably clearing India's 182-day Basic Condition 1 and making them an Indian resident, likely RNOR, for that same FY. Both are true at once: US resident alien for (part of) 2026, and RNOR in India from mid-2026 onward.
If you meet the SPT for the year you leave, you're generally treated as a US resident alien for tax purposes up until your "residency termination date," the point after which you can establish you no longer have a closer connection to the US than to another country. Many people in this position end up filing a dual-status return: taxed as a resident for the part of the year up to that date (worldwide income for that portion), and as a nonresident for the remainder. Dual-status returns have their own quirks (no standard deduction in most cases, specific forms and statements required), and are genuinely one of the more fiddly corners of US tax filing, worth a professional's help rather than doing solo the first time.
There's also a Closer Connection Exception (Form 8840), but it only helps if you were present in the US for fewer than 183 days in the current calendar year, maintained a tax home in another country for the whole year, and can show a closer connection to that country. It's generally not available to green card holders, who need to formally abandon the green card rather than lean on this exception. If you left the US relatively early in the calendar year, it's worth checking whether you qualify.
Once you're no longer a US tax resident, contact your US brokerages and banks and ask them to put a Form W-8BEN on file. That tells them to apply non-resident alien withholding rules going forward instead of continuing to treat you as a US resident. This is a separate, mechanical step from figuring out your filing status for the year you left, and it's easy to forget once you're focused on the India side of the move.
This is general information, not tax advice, and not a substitute for US tax counsel. SPT determinations, dual-status filing, and treaty positions are fact-specific. Confirm your situation with a professional who handles US-India cross-border returns.