In the article, based on the analysis of statistical indicators of the world and national tourism (in 112 countries), studying tourists impact on the destinations natural environment, the change in the indicator of average expenditures of a foreign tourist in the period 1995 - 2022 is assessed, its values are correlated with the dynamics of national inflation and fluctuations in the exchange rates of national currencies at the current moment considering temporary lags. An assumption is made regarding the limit value of one billion international tourist trips per year as a condition for economies of scale in the global tourism industry, a time lag of one year is determined as a condition for the impact of national inflation on the amount of foreign tourist expenditures, and the insignificance of the impact of the national currency exchange rate on the dynamics of tourism expenditures is substantiated.