When a business asks me what cross-border tax will cost them, they are usually asking about my fee. That is almost never the expensive number. The expensive numbers are the ones that never appear on an invoice.
Here is where the money actually goes, in the order I see it wasted.
Withholding tax that nobody reclaimed
This is the largest single leak in my experience, and the least dramatic. A payment leaves India, tax is withheld at the domestic rate, and the recipient never reclaims the difference between that rate and the treaty rate they were entitled to.
Treaty rates on royalties, fees for technical services, interest and dividends are frequently lower than the domestic withholding rate. Claiming them requires paperwork prepared before the remittance, not after: a tax residency certificate, the prescribed declaration, and in many cases a certificate from a chartered accountant supporting the rate applied.
Miss the sequence and the money is gone in practical terms. Technically there is a refund route. Practically, chasing a refund across two tax systems for a mid-sized amount costs more in time and professional fees than the amount itself. So it gets written off, quietly, year after year.
Double taxation that was avoidable
The second leak is paying tax on the same income twice because the credit was never properly claimed in the home country. The treaty exists precisely to prevent this, but the credit has to be substantiated with evidence of the tax paid in the other jurisdiction, in the form the home revenue authority accepts.
I regularly see clients who have paid tax correctly in both countries and simply not connected the two. The Indian side is documented, the foreign side is documented, and nobody assembled the bridge between them. The result is a real cash cost with no legal basis.
Structures built for a situation that no longer exists
Holding structures are designed at a point in time and then left alone. Meanwhile treaties get renegotiated, anti-avoidance rules tighten, substance requirements arrive, and the intermediate entity that made sense five years ago becomes a cost centre that adds risk rather than removing it.
The maintenance cost of a structure is easy to underestimate:
- Accounting, audit and filing in each jurisdiction, every year, regardless of activity
- Directors, registered office and substance in the intermediate jurisdiction
- Professional fees to keep the position defensible as the rules move
- The eventual cost of unwinding, which is usually higher than setting up
I have seen structures costing a meaningful sum annually to preserve a benefit that had already been legislated away.
Transfer pricing adjustments
The intercompany price that was picked informally at the start becomes the position you have to defend years later, with interest running on the gap. Adjustments in India are not gentle, and they cascade: an adjustment in one year invites scrutiny of every year around it.
What makes this costly is not the analysis. A documented benchmarking study is a modest, predictable annual cost. What is costly is not having one when the question arrives, and having to reconstruct a defence for a period where the underlying commercial records were never kept with this in mind.
Permanent establishment exposure found late
The most expensive outcome in cross-border tax is discovering that a foreign entity had a taxable presence in India for several years without realising it. That is not a rate question, it is an entire tax return that was never filed, with attribution of profits, interest, and penalty exposure on top.
It is usually created by ordinary operational drift: an employee who spends more time in India than anyone tracked, a local team that starts negotiating rather than supporting, a contract signed from the wrong place.
Where I would spend instead
If I had to allocate a cross-border tax budget, I would front-load it. Spend on the structure decision before money moves, on getting the documentation cycle right in year one, and on a short annual review that asks whether anything about the business has changed enough to move the tax position.
That review is the cheapest thing on the list and the one clients skip. Businesses change faster than their structures. The transfer pricing policy set when the India team was four people rarely still describes what a team of forty is doing.
The honest summary
Cross-border tax advice looks expensive when you compare it with domestic compliance work. It looks very cheap when compared with a withholding leak running for five years, or a permanent establishment finding that reaches back across open assessment years.
The businesses that overspend are almost never the ones who paid for good advice early. They are the ones who paid for a structure once and never looked at it again.
If you have cross-border flows and no one has reviewed the position recently, AeTx does exactly this review — treaty positions, withholding, transfer pricing and permanent establishment risk, in one pass.