What is TNMM and when would you use it?
The transactional net margin method tests the operating margin an entity earns on a transaction against the operating margins comparable independent companies earn on similar activity. It is used when a direct price comparison is unavailable and a gross-margin comparison is unreliable, which in practice is much of the time. Its advantage is that operating margin is measured below the line where accounting classification differences live, so the comparison survives reporting differences that defeat gross-margin methods. Its cost is distance from the transaction: it infers the price from a return rather than testing the price itself.
Which company gets tested under TNMM?
The less complex of the two. You test the party whose functions can be compared with independent companies — a distributor, a service provider, a limited-risk manufacturer — and leave the residual with the party that owns the intangibles, sets strategy and takes the entrepreneurial risk, because there is nothing comparable to benchmark that party against. Choosing the tested party is a decision to record rather than to assume. If both parties are complex, or both hold intangibles, this method may not be the right one, and the file should say why the choice was made.
Why test operating margin instead of gross margin?
Because classification differences move a gross margin and largely wash out of an operating margin. Whether freight, warehousing, warranty or supervision sits in cost of sales or in operating expenses changes the gross figure and not the operating one, and published accounts usually do not disclose enough to restate comparables to a common basis. Testing below those lines removes the problem. The trade-off is that an operating margin reflects everything the entity does, so the comparable set has to be screened on functions and risks rather than on product.
Which profit level indicator should we use?
The one that reflects what actually drives the entity's return. For a distributor whose value depends on sales volume, a margin on sales is usually appropriate. For a service provider or a limited-risk manufacturer whose return follows the resources it deploys, a mark-up on total costs fits better. Where a business is asset-intensive, a measure related to operating assets can be more informative. The wrong choice does not merely reduce precision; it can produce a result that moves in the opposite direction to the economics, which is the point at which a well-built comparable set stops helping.
Is one year's result enough to test a margin?
Usually not. Single-year results are affected by timing, by start-up or wind-down effects and by ordinary business cycles, in the tested company and in the comparables alike. Looking at several years for both sides gives a more stable picture and makes it easier to tell an ordinary fluctuation from a pricing problem. The related discipline is to watch the result during the year rather than discovering it after the accounts close, since an adjustment is far simpler to make while the year is still open.
What if our margin falls outside the benchmarked range?
First check the range. Comparable sets often contain companies that should have been excluded on functions, on size, on loss history or because they are themselves part of a controlled group, and screening them out sometimes resolves the difference. If the result is genuinely outside a sound range, it needs to be brought within it, and the point chosen has to be reasoned from the facts rather than picked for convenience. Record both steps. A file that shows the set was tested and the point was justified is far easier to defend than a number that simply appears.
Do I get credit for all of the foreign tax I paid?
Only up to your own country's tax on that same income, and only for tax you were legally obliged to pay. Two consequences follow. Living somewhere that taxes you more heavily than your residence country does leaves an excess that becomes a carryover rather than a refund. And withholding suffered above the treaty rate is not creditable — the route back to that money is a refund claim in the country that took it. See claiming the credit.
Can I avoid capital gains tax on a foreign property?
Not by virtue of it being foreign — there is no exemption for that, and the "keep it offshore" advice you may have read is how people acquire penalties rather than savings. What genuinely reduces the gain is ordinary and legitimate: principal residence relief where the property qualifies and the designation is made correctly, a properly built cost base including acquisition costs and capital improvements, the timing of the disposition, the treaty rules for real property, and credit for the foreign tax paid. See principal residence and foreign property.
