Why is Indian tax deducted on my whole invoice rather than my profit?
Because the deduction at source is applied to the payment as it leaves the payer, and the payer has no way of knowing what the receipt cost you to earn. The default position is therefore a deduction computed on the gross amount, which on a contract with real costs behind it takes far more than the eventual liability. A certificate under section 197 is the mechanism that changes this. It authorises the payer to deduct at a lower rate, or not at all, on the basis of computations put in front of the department in advance. Without it the money is not lost, but it becomes recoverable only later, through an Indian return.
Can I get a nil TDS certificate before my Indian client pays me?
That is the point of it. The application is made before the payment, not after, and it sets out what you expect to receive, what earning it costs you, and what you say the correct liability is, with supporting evidence attached. If the department accepts the computation, the certificate is issued for a specified payer, a specified payee and a specified period, and the payer deducts on that basis while it runs. The sequence matters more than anything else here. An application made once the invoice has been settled cannot undo a deduction that has already happened.
I obtained the section 197 certificate after payment, is it wasted?
It does not reach backwards. A certificate directs the deduction on payments made while it is in force, for the payer and the period it names, so a deduction already taken stands. The over-deducted amount is still recoverable, but by a different route: an Indian return, on which the liability is computed on the net position and the excess already withheld is set against it. That is slower and more work than obtaining the certificate first, which is why we treat the application as part of the contract timetable rather than a tax job that can follow along behind it.
Does one certificate cover every Indian customer I invoice?
No. The certificate is issued for a specified payer, payee and period, so it speaks to one paying relationship. Where the same income arrives from several Indian customers, each paying relationship has to be covered, and the practical work is keeping track of which payer holds which certificate and for how long. This is the detail that most often goes wrong later in a contract. The certificate is in place, the customer changes the entity that settles its invoices, and the new entity is not the payer named on the paper it has been handed.
What evidence does a lower deduction application actually need?
Computations first, because the application is an argument about an amount: what the receipt is, what earning it costs, and what the liability on the net position comes to. Then the material standing behind those workings, which means the contract that generates the payment, the cost evidence, and the documents establishing who you are and where you are resident for tax. An application that asserts a conclusion with no workings behind it is the one that comes back with questions, and questions consume exactly the time the application was meant to buy before the payment falls due.
My certificate expired part-way through the contract, what now?
Payments made after the period named on the certificate fall back to the default deduction, because the authority the payer was relying on has run out. Nothing about the underlying position has changed, but the paper that told the payer to deduct less no longer covers the payment in front of it. The answer is a fresh application, made before the next payment is due, on computations updated to reflect what the contract has actually produced so far. Leaving it until the payer has deducted turns a certificate application into a recovery claim on an Indian return.
What does Form W-8BEN actually do?
It tells a US payer that you are not a US person and, where you are entitled, claims the treaty rate on the income they are about to pay you — so withholding comes off at the reduced rate rather than the statutory one. It goes to the payer or the broker, never to the IRS, and it expires, so a stale form is a common cause of over-withholding. Getting it in before payment is the difference between a lower rate and a refund claim. See Form W-8BEN.
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.