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On one hand, the business contributes to the UK by creating jobs, paying taxes, and generating economic activity, which supports growth. On the other hand, the money sent abroad is effectively leaving the UK economy, meaning it isn’t being spent or reinvested locally. However, this outflow is usually only a portion of what the business earns, and the initial economic benefits—like employment and services—often outweigh the loss
Money is going out all the time. Apart from business transactions, everytime you go on holiday abroad you are taking money to other countries that will not be spent in the UK, every time you buy things from Amazon, the profits go overseas.
You cannot isolate one small stream of money and calculate its effect on the economy, because there is no answer. You can only look at the broad daily flow of funds in and out of the UK and assess the economic sitation from that.