Here, bookmakers Paddy Power crunched the numbers to take a look at each League One club and their net spend over the last decade – and there are some pretty shocking results.
However, not every third 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. Wigan Athletic
Net spend over last 10 seasons: +£30,640,000 Photo: Gareth Copley
2. Ipswich Town
Net spend over last 10 seasons: +£22,170,000 Photo: Stephen Pond
3. Peterborough United
Net spend over last 10 seasons: +£21,550,000 Photo: Alex Burstow
4. Charlton Athletic
Net spend over last 10 seasons: +£17,710,000 Photo: Julian Finney
5. Blackpool
Net spend over last 10 seasons: +£14,770,000 Photo: Clive Brunskill
6. Oxford United
Net spend over last 10 seasons: +£13,170,000 Photo: Catherine Ivill