Republican candidate Mitt Romney and his wife have each given $75,000 to the Romney Victory Fund, the joint fundraising group that collects money for his presidential campaign and the Republican National Committee, campaign sources said Friday.

View Photo Gallery: With the Republican presidential nomination essentially assured, former Massachusetts governor Mitt Romney steps up his criticism of President Obama.

The amounts, first reported by CNN, are the maximum that outside individuals are allowed to contribute to Romney’s campaign, the RNC and four state-level committees that he has set up. The sources asked to be anonymous because the donation has not yet been publicly reported.

But Romney himself could actually give much more as a personal gift or as a loan to the campaign, though he has not indicated he will do so.

In 2008, Romney dipped into his personal money to contribute $45 million toward his unsuccessful effort to gain the Republican presidential nomination. Romney, who made most of his $250 million fortune as co-founder of the Bain Capital private equity firm, also used his own funds in his successful 2002 campaign to be Massachusetts governor and a failed 1994 bid to unseat the late senator Ted Kennedy.

The smaller Romney donations to the 2012 effort may be aimed in part as a goodwill gesture toward major donors, to show that he is also willing to chip in for the campaign. Romney has been maintaining a heavy schedule of high-dollar fundraisers as he criss-crosses the country in recent weeks, and raised nearly as much money as President Obama in April after sewing up the GOP nomination.

The Romney campaign also sent out an 11-page document on Friday, first reported by Politico, laying out an elaborate list of perks available to Romney’s biggest fundraisers, who are arranged by categories including Stars ($250,000) and Stripes ($500,000 or more).

Stripes donors will get special access to Romney at the convention and during election night, as well as special briefings from the campaign, the document says. Unlike Obama, Romney has declined to identify any of his top bundlers other than registered lobbyists, who are required to disclose their fundraising to the Federal Election Commission.

The $75,000 amount from each of the Romneys was presumably divided between the campaign ($5,000), the RNC ($30,800) and four state political action committees ($10,000 each). Romney is due to file his April fundraising report with the FEC by Sunday showing more than $40 million raised by the campaign and the RNC.