Thomas C. Foley, the Republican candidate for governor of Connecticut, paid $673 in federal taxes in 2013, despite personal wealth that allowed him to spend $11 million of his own money in a race for the same office in 2010.

Mr. Foley’s campaign made public the summary of the candidate’s tax forms for 2013, which because of reported losses showed his only liability to be $673, a self-employment tax.

The campaign released his 2010, 2011 and 2012 tax summaries last month; 2013 was the third year in a row that Mr. Foley effectively paid no federal income tax. In 2010, his returns showed income of $1.32 million, and $1.1 million in taxable interest.

He has not released his state income tax returns, charitable contributions or taxes on income from partnerships and certain types of investments.