West Brom agreed to pay all of Grzegorz Krychowiak's huge salary to tie up a loan deal for him.
The midfielder joined the Baggies in the final days of the summer recent transfer window after being deemed surplus to requirements at Paris Saint-Germain.
At the Parc des Princes, the Poland international banked around £110,000-a-week from his wages and it was thought the French champions would pick up most of the bill for this season.
But, according to Le Parisien, West Brom will actually be paying 100 per cent of Krychowiak's massive salary.