Bill Thompson ‘s encore run for mayor is barely out of the blocks, but his unsuccessful past bid to take City Hall is still hurting him — and it’s a six-figure pain.

Thompson’s 2009 campaign, which ended in a loss to Mayor Bloomberg, must pay $594,375 in fines for political sign shenanigans, a hearing officer for the city Environmental Control Board declared last week.

The ruling held the Sanitation Department was right in slapping Thompson’s 2009 campaign with fines for illegally posting 7,925 election signs on city property. Putting signs on public property is a campaign no-no, and each citation carries a $75 fine.

Thompson’s attorney, Jerry Goldfeder, said Wednesday he was considering an appeal. “They served the same summonses they did in 2009,” Goldfeder said. “We had them all dismissed last time.”

Goldfeder added that the city dismissed an additional $238,070 in fines against Thompson’s 2009 operation.

Two other contenders in next year’s mayoral race, City Controller John Liu and Public Advocate Bill de Blasio, also owe the city money for posting illegal signs during their 2009 campaigns for their current offices.

De Blasio agreed to pay about $330,000 in September. Liu, whose fines total $528,225, is appealing. The two have been raising big bucks and are presumed to be running for mayor next year.

But as the feds probe an alleged fund-raising conspiracy that has led to criminal charges against two people involved in Liu’s campaign, he has hinted he may not seek the mayoralty. Asked why Liu, the city’s top money manager, was appealing the fines, spokesman George Arzt said:

“Because we have a right to appeal.”

In the past, Liu has said he didn’t pay the fines because they were mistakenly sent to his former campaign treasurer.

The ongoing federal probe is straining Liu’s relations with labor leaders, many of them his political contributors.

(Source: NY Daily News)