Of everything I tell NRI clients, the advice that gets ignored most often is the simplest: check your Indian tax residency every single year. Not once when you moved. Every year.

Residency is not a status you acquire and keep. It is recalculated from scratch each financial year based on how many days you were physically in India. People who have been comfortably non-resident for a decade can become resident in a single year without doing anything they consider significant.

Why it moves without you noticing

The day count is mechanical, and life is not. A parent falls ill and you spend four months in India. A property sale takes longer to close than expected. A project brings you back for stretches you never added up. A period of remote work turns into something longer because it was convenient.

None of these feel like emigrating back. All of them add days. And the tests do not only look at the current year — one of them combines days in the current year with days across the preceding four years, which is how someone who visits India regularly for business can cross a threshold they did not know was approaching.

There is also the deemed-residency route for Indian citizens with Indian income above a threshold who are not liable to tax anywhere else. That provision catches people in jurisdictions with no personal income tax who assumed distance was enough.

What actually changes if you become resident

This is the part clients underestimate. Residency does not adjust your Indian tax slightly. For a resident and ordinarily resident individual, it changes the scope of what India taxes: worldwide income, not just Indian income.

In practice that means:

  • Foreign salary and self-employment income become taxable in India
  • Interest, dividends and capital gains from foreign accounts and portfolios come into scope
  • Foreign assets and financial interests have to be disclosed in the Indian return
  • Foreign tax credit has to be claimed properly, with documentation, or you pay twice

That disclosure obligation is the one I would flag hardest. The reporting requirements for foreign assets carry consequences well beyond ordinary tax underpayment, and they apply to accounts people genuinely forget — a dormant account from a previous job, a pension, a small holding in an employer’s stock plan.

There is an intermediate category, resident but not ordinarily resident, which narrows the scope considerably. Many returning NRIs qualify for it for a couple of years and never claim it because nobody told them it existed.

The conversation I have every year

It takes fifteen minutes. How many days were you in India this year? What does the rolling count look like across the preceding four? Is anything planned in the next few months that will push the number up? Where is your income arising, and where is it taxed?

Done in the middle of the financial year, that conversation is planning. You can still decide whether a trip happens in March or April, and that single decision can move the whole year’s tax position.

Done after the year has ended, it is not planning. It is a calculation of what already happened, and the only remaining question is how to report it correctly.

Keep the evidence as you go

Residency is a question of fact, and facts need proof. The passport with entry and exit stamps is the primary record, supported by tickets and boarding passes. Electronic gates and multiple passports make this messier than it used to be, and reconstructing a travel history five years later is genuinely difficult.

I ask clients to keep a simple running list of India entry and exit dates. It takes a minute per trip and it has settled more than one assessment without further argument.

The mistake underneath the mistake

The real error is treating residency as an identity rather than an annual calculation. People say “I’m an NRI” the way they would state their nationality. The tax system does not see it that way. It sees a day count, tested afresh every year, with different consequences depending on which side of the line you land.

Check it yearly, check it early enough in the year that you can still act on the answer, and keep the travel record that proves it.

For NRI clients with income or assets in more than one country, this annual check is the foundation everything else sits on. If you would like it done properly, AeTx handles residency, treaty positions and foreign asset reporting together rather than as separate exercises.