Here, bookmakers Paddy Power crunched the numbers to take a look at each Championship club and their net spend over the last decade – and there are some pretty shocking results.
However, not every second tier club has net spend in the minus column - scroll down and click through the pages to view the full club-by-club break down:
1. Brentford
Total net spend over the last 10 years: +£81,190,000 Photo: Julian Finney
2. Swansea City
Total net spend over the last 10 years: +£63,420,000 Photo: Dan Mullan
3. Birmingham City
Total net spend over the last 10 years: +£61,690,000 Photo: Mike Hewitt
4. Blackburn Rovers
Total net spend over the last 10 years: +£41,460,000 Photo: Ross Kinnaird