The buxom blonde was hit by two separate tax liens from the US government, ordering the 45-year-old star to cough up the money for her unpaid taxes in 2011 immediately.
The first lien was filed by the Inland Revenue Service (IRS), claiming Pamela owes $259,395.75 for 2011 taxes, while the State of California also says the `Baywatch` beauty owes a further $112,118.90 for 2011, according to TMZ.
The `Dancing with the Stars: All Stars` contestant - who was axed from the ballroom dancing contest in the first round - has previously had tax problems, notably in 2009 when she was hit with a lien for a whopping $1.7 million.
Pamela has even been blacklisted on California`s list of `Top 500 Delinquent Tax Payers` in the past.
Following her short-lived spell on `DWTS: All Stars`, the 45-year-old star has reportedly signed up for British talent show `Dancing on Ice` in a bid to ice skate her way to victory - and the prize money.
A source previously commented: "Pamela will bring a bit of Hollywood glitz and glamour to the show, which we will all need come the winter.
"She`s no stranger to dancing in front of viewers after her stints in America."