DTAA Rate vs Domestic TDS Calculator

Why a treaty rate exists, and why your bank ignores it

India taxes income arising within its borders regardless of where the recipient lives. Your country of residence taxes you on your worldwide income regardless of where it arises. The same rupee of NRO interest therefore falls within two tax nets at once, and a Double Taxation Avoidance Agreement is the bilateral treaty that decides how the two countries divide it. For passive income — interest, dividends, royalties, fees for technical services — the usual mechanism is a ceiling: the source country may tax, but not above an agreed percentage, and the residence country then gives credit for what the source country took. Relief under a treaty is given effect in Indian law through Section 159 of the Income-tax Act, 2025. Where no treaty applies, Section 160 gives unilateral relief for foreign tax suffered on doubly taxed income.

The gap between the two rates is not marginal. On interest, India's domestic charge for a non-resident under Section 393 is 30% plus 4% cess — 31.2% — from the first rupee, with no threshold and none of the reliefs a resident depositor takes for granted. The treaty ceiling for most major NRI corridors sits between 10% and 15%. On ₹20 lakh of NRO interest, a UAE resident faces ₹6,24,000 domestically against ₹2,50,000 under the treaty ceiling of 12.5%. That is ₹3,74,000 a year, on one deposit, from one piece of paper.

And yet the domestic rate is what almost everyone actually pays, because the treaty rate is not something a payer may assume. A bank, a company paying dividends, an Indian client paying a technical fee — each is personally liable for any short deduction, and none of them will take the risk on an assertion. They step down only when they hold documentation that would survive scrutiny: a Tax Residency Certificate issued by the tax authority of your country of residence, a Form 10F filed electronically on the Indian income-tax portal, an active PAN, and a signed declaration that you have no permanent establishment in India. Without the complete set, they deduct at the domestic rate and they are right to.

The treaty rate caps withholding — it does not cap your tax

This is the misconception that costs people the most, because it surfaces as an unexpected demand rather than as a missed saving. A treaty article on interest says the source state may tax the interest, but the tax so charged shall not exceed a stated percentage of the gross amount. That constrains what India may collect at source. It does not convert your income into something charged at a flat rate.

Interest is the head where this bites, because interest received by a non-resident is charged at ordinary slab rates once it is stacked on the rest of your Indian income. Take ₹20 lakh of NRO interest with a valid 12.5% treaty claim and no other Indian income: withholding of ₹2,50,000 against an actual liability of ₹2,08,000, so you are over-withheld and have a refund to claim. Now add ₹20 lakh of Indian rent. The same interest, the same treaty, the same ₹2,50,000 withheld — but the interest is now sitting in the 25% and 30% bands, and the real tax on it is ₹6,03,200. ₹3,53,200 remains payable by you directly, and the treaty has done nothing about it. At larger numbers the effect scales: ₹6 crore of interest to a Canadian resident is withheld at 15%, ₹90 lakh, against a slab liability of ₹2.29 crore — a shortfall of ₹1.39 crore.

Two consequences follow, and neither is optional. First, that balance must be paid through advance tax instalments across the year, not settled at filing — pay late and interest runs under Sections 424 and 425 on top of the tax. Second, you must file an Indian return, because a treaty claim is asserted in the return and the shortfall is discharged through it. People who successfully arrange a low treaty withholding and then treat their Indian obligations as finished are the ones who get a demand two years later, with interest. The heads where the treaty rate genuinely is your final tax are dividends, royalties and technical fees, which carry their own special rate rather than being stacked into your slabs.

Where the treaty gives you nothing — two honest non-answers

The first is where the treaty ceiling sits above India's own rate. A treaty is a maximum, not a substitute rate, and it can never increase your Indian tax. India charges a non-resident 20% plus cess on dividends, or 20.8%. The treaty ceiling on dividends for a portfolio investor resident in the USA or Canada is 25%. So there is nothing to claim: you take the domestic 20.8%, and filing a treaty claim on that receipt achieves precisely nothing. The relief for the same income being taxed in both countries comes at the other end, as a foreign tax credit in your home return. The calculator says this plainly rather than reporting a saving of zero and leaving you to wonder whether you have entered something wrongly.

The second, and far more expensive, is capital gains. There is a persistent belief that a DTAA shelters an NRI selling Indian shares or Indian property. For every corridor modelled here it does not. The gains article in these treaties leaves India free to tax gains on Indian assets, and the treaties that once did otherwise — the Mauritius and Singapore routes that shaped a generation of structuring — were renegotiated years ago. So a Singapore resident selling listed Indian equity held long term pays 13% under Section 198 with cess, and no treaty rate reduces it. On a ₹40 lakh gain that is ₹5,20,000, and no amount of Form 10F changes the figure.

What genuinely helps on a sale is different machinery: a lower-deduction certificate under Section 395. Withholding on a property sale is computed on the sale value, not on the gain, so a seller with a modest gain routinely has an enormous sum withheld and recovers it only through a filed return a year later. The certificate, applied for before the transaction, directs the buyer to deduct against the real gain instead. That is where the money is on a capital-gains transaction, and it has nothing to do with the treaty.

There is a third case, narrower but worth knowing. A few treaties — the India–UAE treaty among them — contain no article on fees for technical services at all. Where a treaty is silent on technical fees, the receipt is generally examined as business profits, which India may tax only where you have a permanent establishment here. That can mean nil Indian withholding rather than 20.8%. It is also one of the most contested positions in cross-border practice, needs a documented no-PE position, and in practice needs a Section 395 certificate to make an Indian payer comfortable. It is an opportunity, not a self-help remedy.

The paperwork: four documents, every single year

Treaty entitlement in India rests on four things held by your payer. A Tax Residency Certificate, issued by the tax authority of the country where you are resident, covering the relevant period — this is the document that proves you are a resident of a treaty partner and therefore a person the treaty applies to. Form 10F, which supplies the particulars a TRC may not contain and which must be filed electronically on the Indian income-tax portal rather than handed over as a signed sheet. An active PAN, without which the payer is pushed towards a higher-rate default. And a declaration that you have no permanent establishment in India, since almost every treaty article withdraws the ceiling where the income is effectively connected to a PE here.

Every one of these is annual. A TRC states a period and then lapses. A Form 10F is filed for a financial year and does not carry into the next. The no-PE declaration is given afresh. This is the single most common failure in the whole area, and it is entirely mundane: an NRI arranges the treaty rate correctly in the first year, the relationship works, and then in year three nobody chases the renewal. The bank reverts to 31.2% with no announcement, and the depositor notices when the annual interest certificate arrives. That is ₹3,74,000 on our ₹20 lakh example — converted from cash in hand into a refund claim, recoverable only by filing an Indian return and waiting a year or more, with no meaningful compensation for the delay.

The relief is also strictly prospective. Handing your bank a TRC in January does not undo the domestic-rate deductions made in April through December. Those come back through the return. If you are going to operate on the treaty rate, the documentation belongs at the start of the financial year, and the renewal belongs in a calendar reminder rather than in your memory. Where a payer remains unwilling to apply the treaty rate even with the full set — which happens, and is a commercial judgement rather than a legal one — the answer is a certificate under Section 395, which is an instruction from the department rather than a request from you, and which a payer can rely on without personal risk.

Reading the rates — and why you must check your own treaty

The ten corridors modelled here cover the great majority of Indian non-residents: the UAE, the USA, the UK, Singapore, Canada, Australia, Saudi Arabia, Qatar, Oman and Kuwait. The rates used are the widely published ceilings for each, and they are deliberately a short list — a calculator that invents a plausible-looking rate for a country nobody checked is worse than one that declines to answer. If your country is not here, the number must be read off the treaty itself.

Even for the countries listed, the figure shown is a starting point rather than a conclusion, for three reasons. Treaties are amended by protocol, sometimes substantially, and a rate correct for years can change. Several articles quote two rates — a lower one reserved for a company holding a substantial stake in the payer, and a higher one for everyone else; an individual portfolio investor almost always falls in the second, and that is the rate used here. And several treaties carry a most-favoured-nation clause that can import a better rate agreed with a third country, which is valuable, contested, and entirely fact-specific. Read the relevant article of your own treaty, in its current form, against your own facts before you rely on a number.

One structural point makes the gap wider than a rate-to-rate comparison suggests. The domestic rate carries 4% cess and, above ₹50 lakh, surcharge — so a headline 30% on interest becomes 31.2% at ordinary levels and 39% for someone above ₹2 crore. A treaty ceiling is taken as all-inclusive: the treaty says the tax charged shall not exceed the stated percentage, and cess and surcharge are part of that tax rather than additions to it. So a 15% treaty rate against a 30% domestic rate is not a halving — for a large recipient it is 15% against 39%, and on ₹6 crore of interest that difference is ₹1.44 crore of withholding.

What the model leaves out

The calculator prices one decision: whether to claim treaty relief on one stream of Indian income, and what that claim is worth. Several things sit outside it. It does not model the tax you pay in your country of residence, which is usually the larger number and which determines whether treaty relief leaves you better off overall or merely moves tax from one jurisdiction to another. Where your home country taxes worldwide income and gives a credit for Indian tax, reducing the Indian withholding can simply increase your home liability by the same amount — the benefit is then in timing and cash flow, not in total tax. Where your home country does not tax the income at all, the Indian reduction is a straight gain.

It treats the income as a single annual figure at a single rate, whereas a real year has several payers each making their own withholding decision, and a treaty claim established with one bank does nothing at another. It does not model the ₹1.25 lakh annual exemption on long-term listed equity gains, since withholding runs on the gross. It applies surcharge at the headline thresholds without modelling marginal relief for income sitting just above one of them. And it assumes the classification you select is the correct one — in practice, whether a payment is a royalty, a technical fee or business profits is the most litigated question in Indian cross-border taxation, and getting it wrong is a more common cause of a failed treaty claim than any rate error.

Finally, it assumes you are entitled to the treaty in the first place. Treaty benefits can be denied where an arrangement's principal purpose was to obtain them, and residence for treaty purposes is a substantive test rather than an address. For an individual genuinely living and working abroad these are rarely live issues. For anyone with residence in more than one country, a recent move, or a structure between themselves and the income, they are the first questions to settle — before the rate table matters at all.