DTAA stands for Double Taxation Avoidance Agreement. India has these agreements with over 90 countries. They exist to ensure that the same income is not taxed twice — once in India and once in the country where the taxpayer resides.

The concept is simple. The execution is where most NRIs and cross-border businesses leave significant money on the table every year.

What DTAA actually does

A DTAA between India and another country allocates taxing rights over different types of income. For some income — typically employment income, business profits, capital gains on immovable property — the treaty assigns primary taxing rights to one country. For other income — dividends, interest, royalties — it typically limits the rate at which the source country can withhold tax.

That last point is where the money is for most NRIs with Indian income. Without a treaty, India withholds tax at 30% on interest and dividend income paid to non-residents. With a treaty, the rate might be 10% or 15%. On any meaningful quantum of Indian investments, this difference is significant every year, compounded over time.

The claim process — where most people stop

Claiming DTAA benefits in India requires two things: a Tax Residency Certificate (TRC) from the country of residence, and a completed Form 10F filed with the Indian income tax authority.

The TRC is issued by the tax authority of the country you reside in. For the UK, it’s HMRC. For the US, it’s the IRS. For the UAE, it’s the Federal Tax Authority. The process varies by country but is generally not complicated — most authorities issue TRCs routinely upon request.

Form 10F is filed on the Indian income tax portal. It captures basic residency and identity information and the period for which the TRC is valid. Once filed, you submit it to the Indian payer (bank, company) who then applies the lower treaty rate of TDS instead of the default 30%.

The failure point: most NRIs don’t know this process exists. Their Indian bank withholds 30%, they accept it as the cost of having Indian income, and they move on. The process to correct this — get TRC, file Form 10F, submit to payer — takes a few hours and can save tens of thousands of rupees annually.

The most valuable treaty provisions

Interest income: Most treaties reduce Indian TDS on NRO account interest from 30% to 10–15%. NRIs with significant NRO deposits often pay twice the tax they’re required to.

Dividend income: Indian company dividends paid to non-residents are subject to TDS. Treaties typically cap this at 10–15%.

Capital gains: Treaty treatment varies significantly. Some treaties give India exclusive taxing rights on immovable property gains. Others provide more favourable treatment for securities. The treaty text matters, and the rules change — the India-Mauritius and India-Singapore treaties, for instance, have been amended in ways that materially changed the capital gains picture for investors routing through those jurisdictions.

Royalties and fees for technical services: Highly treaty-dependent. Some treaties have low rates; others allow India to tax at domestic rates. For NRIs receiving consulting fees or IP royalties from Indian entities, the treaty rate can dramatically change the economics.

What the treaty cannot fix

DTAA provides relief from double taxation but doesn’t eliminate all Indian tax on India-source income. If India has the primary taxing right under the treaty — as it typically does for rental income from Indian property — the income is taxable in India regardless of the NRI’s treaty benefits. The treaty then ensures the country of residence gives credit for Indian taxes paid, preventing double taxation.

Treaty shopping — using a tax-efficient intermediary country to claim favourable treaty benefits you’re not genuinely entitled to — is something Indian tax authorities scrutinise closely. The Limitation of Benefits and Principal Purpose Test provisions in India’s newer treaties make this more difficult.

The action item

If you’re an NRI with Indian bank accounts, investments, or property, and you’re not claiming DTAA benefits: get a TRC from your country of residence for the current year, file Form 10F on the Indian tax portal, and submit copies to your Indian bank. Do this once a year, before March 31st, and you’ll immediately reduce the TDS being deducted on your Indian income.

The process is not complicated. The savings are real. Most people just don’t know to do it.