Is it possible to simultaneosly make a gross profit and a net loss?

yes it is but this would be quite rare. you can have a gross profit as the differences between revenues and expenses but out of all the expenses a big proportion would not be tax deductible. therefore, you will need to pay (and book accordingly) a big tax charge which would impact your net result. example: Revenues 1000; Expenses 900; Tax non-deductible expenses 800; Gross profit 1000-900=100; Tax charge at, say 20%, (1000-(900-800))*20% = 180; Net profit 100-180 = -80