Determine the applicable withholding-tax rate between the Netherlands and 21 treaty countries, for outbound and inbound flows. The tool places the domestic rate next to the treaty rate, tests your holding against the qualifying-participation threshold, and flags where LOB, MLI or an elevated beneficial-ownership risk needs attention.
With withholding tax, the percentage itself is rarely the problem — the condition underneath it is: a qualifying-participation threshold that varies per treaty from 5% to 50%, a holding period of six or twelve months, or an LOB article that makes the benefit depend on who sits behind the company. This tool always places the applicable rate next to the threshold it was tested against and next to the domestic rate the treaty reduces.
Be aware of the limits of the calculation. The model holds one participation threshold with one corresponding rate per country; treaties with more tiers are flattened to that single tier. Holding periods are reported but not tested, and the tool performs no PPT, LOB or beneficial-ownership test — those flags are signalling, not a judgement. The report names the treaty year per country and the dataset vintage used, so you know exactly which table you hold; for a definitive position, always verify against the consolidated treaty text.