Brown’s campaign said that he has too decided against paying the voluntary higher tax rate.
During an interview on WTKK-FM on Friday, Brown was also asked if he would release his tax returns.
Brown said he would probably make public the last five or six years of returns that he and his wife, Gail Huff, had filed.
“I’m happy to, I’ve got nothing to hide,’’ he said. “Gail and I would certainly love to be transparent and in this position you need to be and if there are any questions, great.’’
“So we’ll probably, we’re considering releasing six years, five-six years I don’t care, whatever,’’ he added.
Brown did not indicate when he might make the returns public.
Warren has already said she would release two years of returns if Brown did the same. On Friday, she said if Brown were to release more than two years, she would discuss the possibility of releasing additional years.
The Brown campaign called Warren, a Harvard University law professor and consumer advocate, “hypocritical’’ for pushing for higher taxes for millionaires without saying whether she had voluntarily paid the higher state rate.
“The problem with running a campaign based on self-righteousness and moral superiority is that you had better live up to the same standard you would impose on everyone else,’’ Brown campaign manager Jim Barnett said Friday.
According to federal disclosure reports, Warren was paid $429,981 as a Harvard law professor from 2010 to 2011 and got nearly $134,000 in consulting fees on legal cases in 2010.
Warren and her husband, Bruce Mann, who also teaches at Harvard, reported investments, bank accounts and other various holdings worth more than $3 million. Warren reported her home near Harvard Square in Cambridge is worth between $1 million and $5 million.
Brown’s criticism surfaced after Warren and other Democrats faulted him for voting against the so-called “Buffett rule’’ bill in the Senate on Monday that would have increased taxes on millionaires.
The bill is backed by President Barack Obama and named after investor Warren Buffett, who says he pays a lower tax rate than his secretary.