Government officials say 261 soccer players from the Bulgarian league are being investigated for suspected tax evasion.
The National Revenue Agency says it will check property and bank deposits against declared incomes and refer discrepancies to a public prosecutor.
Local media reports say some highly paid players declare the minimum monthly salary of $157.
The probe has revealed more than $5.7 million in unpaid taxes and social security contribution.
Tuesday's action was the latest embarrassment for Bulgarian soccer, which has been plagued by poor international performances and a high-profile spat over poor officiating.
