A private company awarded a lucrative contract to continue running the Hobart Private Hospital donated almost $75,000 to the Tasmanian Liberals over seven years, and none of it was declared by the party because of the state's electoral laws.

Key points: Healthscope donated almost $75,000 to the Tasmanian Liberals over seven years, more than it gave to any other political party

Healthscope donated almost $75,000 to the Tasmanian Liberals over seven years, more than it gave to any other political party The private health care provider was recently awarded the contract to continue running the Hobart Private Hospital

The private health care provider was recently awarded the contract to continue running the Hobart Private Hospital There are calls for reforms of State laws so everyone knows how much is being donated and by whom

Revelations of Healthscope's donations to the state Liberal party from 2011 to 2018 have prompted fresh calls from Labor, Greens and independent MPs for swift action on the donation reform first promised by the State Government in March last year.

Returns from the private health care provider lodged with the Australian Electoral Commission show Healthscope donated more to the Tasmanian Liberals in that period than to any other political party in Australia.

But because each donation was below the state's declaration threshold, the Tasmanian Liberals have never made the cash public.

Tasmania has the weakest political donation laws in the country, meaning only donations of more than $14,000 have to be declared, and not until the February after the end of a financial year.

Asked why Healthscope had donated to the party, and whether any donations were made last financial year, a spokeswoman said: "Healthscope has not made any donations to any Tasmanian parties for at least the past two years."

Healthscope's 20-year contract to run the private hospital was due to run out this month.

The State Government says Healthscope won the private hospital tender in arms-length tender process. ( ABC News )

It was announced last week the company could continue to run the hospital on the proviso its emergency department operated 24 hours a day.

Previously, the Hobart Private Hospital could and did close its emergency department, including when the public Royal Hobart Hospital was under stress.

A Government spokesman said the tender process was "conducted at arms-length by the Department of Health", which chose Healthscope out of seven organisations.

"The decision was made to conduct a fully open and competitive tender process, to maximise consideration of potential operators in order to deliver the best possible result for the healthcare of Tasmanians," he said.

Labor's Ella Haddad said the disparity between the donations made and what was declared by the Liberals showed why the state's electoral laws needed updating.

Labor wants 14-day rolling disclosures of any political donations of more than $1,000.

"The Government hasn't disclosed these donations, and under the current laws they don't have to," she said.

People 'sick and tired' of not knowing 'influences'

The State Government committed to updating donation disclosures through a review of the Electoral Act immediately following the poker machine-dominated state election, and released an interim report into the review 12 months ago.

In the meantime, a study from the University of Tasmania's Institute for the Study of Social Change revealed just 20 per cent of the $25 million donated to Tasmanian political parties in the past decade was publicly disclosed.

Healthscope also runs the St Helen's Private Hospital in Hobart. ( ABC News: David Hudspeth )

Greens leader Cassy O'Connor said there was a reason companies and individuals made donations to political parties.

"No corporation, no big business hands over money out of the goodness of its heart," Ms O'Connor said.

"It's money that they regard as an investment into their own self-interest in the future."

Murchison independent MLC Ruth Forrest agreed.

"People are sick and tired of not knowing what influences are out there, and we have a right to know when we're casting our vote," Ms Forrest said.

A Government spokesman said the final report into the Electoral Act review would be handed to Cabinet by the end of the year.