Why is so much tax deducted from my NRO interest?
Because the bank applies the rate that a non-resident's taxable interest attracts, not the rate your overall position would produce. It has no view of your total Indian income, your deductions or your treaty position; it deducts and deposits the amount against your tax identifier. For most depositors that rate is higher than the tax the interest would actually bear once the liability is computed, so what has been taken is not a final tax but an amount to be reconciled. Two things can change it at source: a documented treaty rate, or a certificate authorising a lower deduction. Otherwise the route is a return.
Can I submit a no-deduction declaration like a resident can?
No. The declarations a resident depositor files to stop deduction at source are not available to a non-resident, and a bank that accepts one from an NRI is making an error that lands on both of you. This is worth knowing because the advice circulates freely among family in India, where it is correct. The non-resident equivalents differ in kind: either the bank documents a treaty rate, or you hold a certificate obtained from the tax authorities authorising a lower deduction. Both operate prospectively, and neither is a form you sign at the branch counter on your own initiative.
How do I claim back the tax deducted on my NRO interest?
By filing an Indian return for the year. The return sets your actual liability against what the bank deducted and deposited, and the difference is claimed back. That is the design rather than a failure of it: deduction on gross interest and tax on a computed liability are different figures, and the return is where they meet. Practically, it means checking that every deduction the banks made is credited against your tax identifier before you file, because a deposit that does not show on your record cannot be claimed, and tracing one takes longer than the filing itself.
Can my treaty rate reduce the bank's deduction?
It can, but only if it is documented with the bank before the interest is credited, and only where the treaty actually gives a lower rate on this income in your circumstances. The bank applies what it holds on file; it will not research your residence for you. So the residence evidence and the declaration the bank requires have to be in place in advance and kept current, because the file lapses. Where the documentation goes in late, the earlier deductions stand at the ordinary rate and come back, if at all, through the return.
Do I have to file an Indian return just for bank interest?
If you want the excess deduction back, yes, because there is no other route to it. Interest alone can make a return worthwhile, since the deduction is computed on the gross credit while your liability is computed after everything that reduces it. Depositors who skip the filing on the grounds that the amounts are small are often surprised when several banks and several years are added together. The other reason to file is practical: the deduction records you need to support a claim get harder to assemble the longer a year is left alone.
What does my bank need to apply a treaty rate?
Enough to satisfy it that you are resident in the treaty country and entitled to the rate. In practice that means evidence of your tax residence issued by the other country, the declaration the bank asks for, and your Indian tax identifier recorded on the account. It has to be in place before the interest is credited, and it has to be renewed, because the bank applies whatever is current on the file at the time of the credit. Where the file has lapsed, those credits revert to the ordinary non-resident rate and the difference becomes part of the return.
Branch or subsidiary — which should we use to expand?
A branch keeps one taxpayer: results consolidate at home, losses are usable sooner, and the exposure is that the branch is a permanent establishment whose profit the host country taxes, sometimes with a branch tax on repatriation. A subsidiary is a separate taxpayer with limited liability and local rates, at the cost of withholding on dividends home and transfer pricing on everything between them. The deciding facts are usually expected losses, liability and exit plans. See branch against subsidiary.
What is Form 1042-S and what do I do with it?
The statement a US payer issues to a non-resident showing US-source income paid and tax withheld — the non-resident counterpart to a 1099. Use it two ways. In your own country it evidences the US tax paid for credit purposes. And where the rate withheld was higher than your treaty entitlement, or the income was not taxable at all, the way back to the money is a US non-resident return claiming the refund. Check the income and exemption codes before assuming the rate was right. See Form 1042-S.