These cities and states are throwing hundreds of millions at Amazon for its new headquarters

Donald Bren, the multi-billionaire owner of the development firm Irvine Company, said he would bankroll the entire construction of HQ2 — which Amazon expects to cost $5 billion — if the company chooses Irvine, California.

Bren outlined his offer in an October 12 letter to Amazon CEO Jeff Bezos.

"In essence, you would have a one-click shopping opportunity and be able to capitalize on our in-place property development rights, thus avoiding potential delays, because Irvine Company has invested more than 60 years master planning 93,000 acres of land, and designing and overseeing the creation of the largest new city in America…Irvine, California," he wrote.

The state of Pennsylvania is reportedly offering Amazon "more than $1 billion" in tax breaks for its campus, according to The Philadelphia Inquirer.

Philadelphia submitted a separate bid, and is reportedly considering a tax exemption worth up to $2 billion over 10 years.

Maryland governor Larry Hogan would not disclose specifics about the tax incentives in the state's HQ2 bid.

But the Baltimore Sun reported that Maryland's incentive package totals somewhere "in the billions of dollars."

Baltimore City as well as Charles, Howard, Prince George's, and Montgomery counties are also submitting separate proposals that could include additional tax breaks for the company.

Worcester, a city an hour west of Boston, Massachusetts, said it's willing to grant $500 million in real-estate tax exemptions and a 100% personal property tax exemption for 20 years to Amazon employees, according to WBUR.

The city's 60-page HQ2 proposal also mentions the possibility of additional tax credits for investment and research and development.

Chula Vista, a city 10 miles outside of downtown San Diego, California, is offering Amazon a $400-million tax incentive package, a spokesperson from the city told Business Insider.

Its 25-page bid, called "Welcome Home Amazon," also promises to give Amazon 8 million square feet of space and proposes the construction of "the world's first binational university" (with campuses in California and Mexico).

California's governor's office will offer $300 million to Amazon in tax breaks if it picks a city in the state, Reuters reports.

But a bill introduced on Thursday in California's state assembly could give the company even more — up to $1 billion in tax breaks over 10 years.

Memphis will offer $60 million in economic incentives to Amazon, according to The Commercial Appeal.

The Memphis City Council voted on October 3 to offer the tax breaks for the company's headquarters, which may be supplemented by additional incentives from the development agency Economic Development Growth Engine, Shelby County, and the state of Tennessee.