How DTAA Works for NRIs: Two Tax Nets, Two Relief Methods, and the Paperwork That Unlocks Them

Double taxation is not a bureaucratic accident. It is two countries making two perfectly legitimate claims on the same rupee. India taxes income by source — interest from an Indian deposit, rent from a Mumbai flat, dividends from Indian shares are Indian income no matter where you live. Your new country almost certainly taxes by residence — the US, UK, Canada, and Australia all tax their residents on worldwide income. So your NRO deposit interest sits squarely in both nets: India withholds tax because the deposit is Indian, and your country of residence taxes it again because you are theirs.

A Double Taxation Avoidance Agreement is the treaty that referees this overlap. India has comprehensive DTAAs with more than 90 countries — one of the widest treaty networks among emerging economies — and if you are an NRI earning anything in India, one of them almost certainly governs you. Three sections of the Income-tax Act do the plumbing. Section 90 gives treaties their legal force in India — and, crucially, subsection 90(2) says you may apply either the treaty or domestic law, whichever is more beneficial to you, income by income. Section 90A extends the same machinery to agreements signed between specified associations rather than governments (the India–Taipei arrangement is the working example). And Section 91 is the safety net: if your country has no treaty with India at all, India still grants unilateral relief, broadly at the lower of the two countries' rates on the doubly taxed income.

The two relief mechanisms: exemption and credit

Every treaty resolves double taxation through one of two methods, and knowing which applies to your income tells you most of what happens next.

Under the exemption method, one country simply steps out. The income is taxed in one state and exempt in the other — clean, but rare, because governments dislike surrendering a tax base entirely. Where it appears in India's treaties, it is usually confined to specific income types or specific taxpayer categories.

Under the credit method — the workhorse of nearly every treaty India has signed — both countries keep the right to tax, but the country where you reside must give you credit for the tax the source country already collected. India taxes your NRO interest first; the US then taxes it too, but subtracts the Indian tax from your American bill. You end up paying, in total, roughly the higher of the two countries' rates rather than the sum of both. Not zero tax — one tax.

The treaty's other job is to cap what the source country may charge in the first place, and this is where NRIs see real money move.

Treaty rates in practice: the India–US example

Take the India–US treaty, whose full text sits on the IRS treaty page. Article 11 caps Indian tax on interest paid to a US-resident beneficial owner at 15 percent (a lower 10 percent exists, but only where the lender is a bank or financial institution — not you and your fixed deposit). Compare that with domestic law: NRO interest ordinarily suffers TDS at 30 percent plus cess, an effective 31.2 percent before any surcharge. On a ₹10 lakh NRO deposit (about $11,500) earning 7 percent, that is ₹70,000 of interest — roughly ₹21,840 withheld at the domestic rate versus ₹10,500 at the treaty rate. The treaty leaves ₹11,340 (about $130) in your account, every year, on that one deposit.

Dividends run the other way, and this surprises people. Article 10 of the same treaty caps Indian tax on dividends paid to an individual US resident at 25 percent — but India's own law taxes a non-resident's dividends at only 20 percent under Section 115A. Since Section 90(2) lets you pick whichever is kinder, you simply use domestic law and ignore the treaty for that income. A treaty is a ceiling, not a rate card: it can never make you worse off than the Act, but it does not always make you better off either.

Indian income (US-resident NRI)	Domestic rate	India–US treaty cap	Which applies
NRO deposit interest	30% plus cess (31.2%)	15%	Treaty
Equity dividends	20% plus cess (20.8%+)	25%	Domestic law, via Section 90(2)

Every treaty pairs its own numbers with its own conditions — the UAE, UK, Canada, Singapore, and Australia treaties each read differently — so check your corridor's text on the department's DTAA index before assuming any rate. We've walked two of those corridors in detail: how HMRC taxes Indian income under the UK treaty, and how the ATO taxes Indian assets under Australia's.

No TRC, no treaty: the paperwork gate

India does not hand out treaty rates on your word. Section 90(4) makes a Tax Residency Certificate — issued by the tax authority of the country you live in — a precondition for any treaty claim. For US residents that means Form 6166, obtained by filing Form 8802 with an $85 user fee (about ₹7,400) and a lead time that can run six to eight weeks, so request it well before your bank's deadline. Other countries have their own equivalents; HMRC, the CRA, and the ATO all issue them. (Canadian NRIs claiming treaty relief usually face a second filing triggered by the same Indian assets — the T1135 foreign-property report, which is separate from DTAA but easy to miss alongside it.)

Because most TRCs omit details India wants — your tax identification number abroad, the period of residence, your address — Section 90(5) adds Form 10F, a short self-declaration that must now be filed electronically on the income-tax e-filing portal. Paper 10Fs stopped being accepted in October 2023. If you have no PAN and are not required to obtain one, the portal has a dedicated registration category for non-residents, so a missing PAN is no longer the roadblock it once was.

The sequence matters. Your bank applies the treaty TDS rate only if the TRC and Form 10F acknowledgement are in its file before it credits the interest. Miss that, and the bank deducts the full 31.2 percent; your money is not lost, but recovering the excess means filing an Indian income-tax return and waiting for the refund — a year-long detour that a week of paperwork would have avoided. The same discipline pays off when repatriating funds from India: the chartered accountant's certificate that authorises the transfer leans on the same treaty rate you documented here.

Dual residents: the tie-breaker cascade

It is entirely possible to be a tax resident of two countries in the same year — a mid-year move commonly makes you an Indian resident under the 182-day rule and a US resident under the substantial presence test simultaneously. Treaties resolve this with the tie-breaker in Article 4: you are deemed resident where you have a permanent home; if you have one in both countries, where your centre of vital interests lies (family, employer, the life you actually live); failing that — or where you have a permanent home in neither — your habitual abode, then your nationality, and as a last resort the two tax administrations decide by mutual agreement. Each test applies only if the previous one fails, and the outcome determines which country gets to tax you as a resident under the treaty. In a moving year this single determination can swing more tax than every rate cap combined — it is the first question a good cross-border CA will ask you.

The credit on the other side

Relief has a second half that happens in your country of residence. A US-based NRI claims Indian tax as a foreign tax credit on Form 1116, filed with the regular 1040. Two rules there deserve respect. First, the credit is capped at the US tax attributable to your foreign-source income — you cannot use Indian tax to shelter US salary — though unused credit carries back one year and forward ten. Second, the IRS credits only tax you legally owed: if India withheld 31.2 percent where the treaty allowed 15, only the 15 percent qualifies; the excess must be recovered from India, not credited in America. Sloppy Indian paperwork therefore creates a gap no US form can close. When income flows the other way — foreign tax credited against Indian liability — India's version of the same claim runs through Form 67 on the e-filing portal — filing it with your return is best practice, though the rules allow it up to the end of the assessment year.

Salary, rent, and capital gains: the articles beyond interest

Interest and dividends are where most NRIs meet their treaty, but three other articles decide real money in specific years.

Salary is governed by the dependent-personal-services article, and its rule is refreshingly physical: employment income may be taxed where the work is performed. Live in London, do your job in London, and — once the treaty's tie-breaker makes you a UK treaty-resident, as it would on those facts — India has no claim on that salary even in a year you're an Indian tax resident under domestic law. The complication arrives with cross-border working: a secondment, a return-year with months worked in each country, or extended India work-from-home for a foreign employer, where the India work days give India a taxing right over that slice of salary. Treaties soften this with a short-stay exemption — broadly, under 183 days in the work state, paid by a non-resident employer, cost not borne by a local permanent establishment — but all three conditions must hold, and the work-from-Bengaluru arrangement that HR waved through often fails the third one in spirit if not on paper.

Rent follows the immovable-property article, and the rule is the oldest in the treaty book: the country where the property stands taxes first. Your Mumbai flat's rent is Indian-taxed no matter where you live; your country of residence taxes it too and credits the Indian tax. There is no planning to do here beyond doing the compliance properly on both sides — the treaty never moves land.

Capital gains is the article that varies most violently between treaties, and the one place where "check your corridor" is not a disclaimer but the entire advice. The India–US treaty simply lets each country apply its domestic law to gains — so India taxes your Indian share sale, the US taxes it too, and Form 1116 reconciles them. But several of India's treaties — Singapore and the UAE among them — contain residual gains clauses that allocate certain gains exclusively to the residence country, and tribunal-level litigation continues over exactly which assets fall inside them, mutual fund units being the running example for Gulf residents. If a large redemption is coming and your treaty has one of these clauses, this is precisely the fee-worthy question: the difference is not a rate, it's whether India taxes the gain at all.

The MLI layer: the purpose test over everything

Since 2019 a second instrument sits on top of India's treaty network. The Multilateral Instrument — the MLI — amended most of India's major treaties in one stroke, and its load-bearing addition is the principal purpose test: a treaty benefit can be denied if obtaining that benefit was one of the principal purposes of the arrangement that produced it. This is the provision that ended classical treaty shopping — the Mauritius-holding-company era — and it now reads over the UK, Canada, Australia, Singapore, and UAE treaties, among others. The India–US treaty is the notable exception, unmodified because the US never signed the MLI.

For an individual NRI claiming their own treaty — you live in Toronto, you claim the India–Canada rate on your own NRO interest — the PPT is no threat at all; residence is a fact, not an arrangement. Where it bites is contrivance: routing an investment through a third country because its treaty reads better, or timing a residence change around a disposal so a friendlier capital gains article applies. The era when the cleverness was the plan is over; treaties now reward the boring truth of where you actually live.

Where the map ends

Everything above is the standard route, and for interest, dividends, and rent it usually works exactly as described. But treaty positions are genuinely situation-specific: capital gains articles vary sharply between treaties, pensions and retirement accounts sit in contested territory, and a dual-residence year layered on RNOR status in India can produce outcomes no blog article should predict for you. Some hazards live entirely outside the treaty, too — US NRIs holding Indian mutual funds face PFIC rules that no DTAA softens. If your year involves a cross-border move, income above roughly ₹50 lakh (about $57,000) where surcharge changes the arithmetic, or anything beyond plain deposit interest and dividends, a cross-border CA's fee is cheap against the cost of an indefensible treaty position. The treaty is the map; someone still has to read your terrain.

Frequently asked questions

Do I need a fresh TRC every year?

Yes. A Tax Residency Certificate covers a specific period, and treaty relief is claimed year by year — so each financial year in which you want the treaty rate needs a TRC covering that year, plus the electronic Form 10F, sitting in your bank's file before the income is credited. Set a standing reminder for January: the US Form 6166 lead time alone can eat two months.

If both countries tax my income, does the treaty make one of them refund the other?

No — the credit flows one way. The source country (India, for Indian income) taxes first at up to the treaty rate; your residence country taxes the same income and subtracts what India collected. You end up paying roughly the higher of the two rates in total. The treaty's promise is one tax, not no tax — anyone promising you zero is describing either the exemption method's rare appearances or a mistake.

My country has no tax treaty with India at all. Am I stuck paying twice?

No. Section 91 of the Income-tax Act grants unilateral relief even with no treaty: broadly, India allows a deduction from Indian tax at the lower of the Indian rate or the foreign country's rate on the doubly taxed income. It's coarser than treaty relief — no rate caps on TDS, no tie-breaker — but the double tax itself is addressed.

The bank already deducted 31.2% before my paperwork was in place. Is that money gone?

No, but it's slow. Excess TDS is recovered by filing an Indian income-tax return claiming the treaty rate, and waiting for the refund. The money comes back — with interest for the delay period in most cases — but a refund cycle is measured in months against the week the TRC-and-10F paperwork would have taken. One missed January becomes a working-capital problem the following spring.

Does the treaty protect me from US state taxes?

No, and this catches almost every California NRI. US states are not parties to federal tax treaties, and several — California most prominently — do not honour them. Interest whose Indian tax the treaty caps at 15% (with the credit living on your federal return), or NRE interest that India exempts entirely, is simply ordinary taxable income on a California resident return with no foreign tax credit. The treaty and the foreign tax credit live at the federal layer; the state layer plays by its own rules.

My NRE interest is tax-free in India. Does the treaty keep it tax-free where I live?

No — this is the most common misreading in the corridor. India's NRE exemption is domestic law, a unilateral gift that binds only India. Your residence country taxes that interest under its own rules, treaty or no treaty, because the treaty caps what the source country charges — it never obliges the residence country to mirror an exemption. The full picture of which accounts are taxed where is in our NRE vs NRO vs FCNR guide.

Can I claim treaty benefits without an Indian PAN?

For the Form 10F filing itself, yes — the e-filing portal has a registration category for non-residents without PAN, which ended the old deadlock where the form needed a portal login and the login needed a PAN. Whether you can avoid a PAN altogether is a different question: banks and higher-TDS provisions make one practically necessary for anyone with ongoing Indian income, and it costs little to obtain from abroad.