And while Australia's sovereign debt jumped by more than $210 billion in 2020, its ratio of debt to gross domestic product remains among the lowest in the developed world.

Janus Henderson Investors' sovereign debt index, released on Monday, placed Australia 13th in the global public debt standings with $1.02 trillion in debt.

This equates to approximately $40,000 per Australian - just half the debt owed per capita in the United States and two thirds of that in the United Kingdom.

Moreover, this could rise to more than $45,000 per Australian by the end of 2021 as the government spends its way out of COVID-19.

Yet while numerical levels of debt have rapidly climbed, interest payments on that debt have plummeted as rates hit record lows, aided by the intervention of central banks in money markets by suppressing bond yields.

Janus Henderson says the interest bill on Canberra's debt has dropped 56 per cent in the past 25 years, and could drop a further 45 per cent by 2025.

Average interest rates for the Australian government sit at 0.9 per cent, while the country's debt to GDP ratio currently sits at 55 per cent.

This is lower than the global debt to GDP average of 70 per cent.

Janus Henderson Australian fixed interest head Jay Sivapalan said countries had only two options for debt management - either pay their debt down via austerity measures or grow and inflate their way out of debt.

Australia and other developed countries were focusing on the latter option.

"Central banks will continue to tolerate a higher level of inflation in their respective economies when it comes, and it may take some time ... because it's part of the solution," Mr Sivapalan told reporters on Monday.

He said that as a result, central banks would gradually shift their focus to broader financial stability and enact monetary policy accordingly, fearful of mass defaults prompted by interest rate volatility.

"Central banks will start using financial stability as their number one objective because there's too much at risk, too much at stake - every asset class, every property value is reliant on the cost of funding," Mr Sivapalan said.

"Debt is a double-edged sword - when it works and is used correctly, it can deliver superior growth outcomes and moderate future levels of debt.

"What has changed after COVID-19 ... is governments' willingness and propensity to use debt as a tool to grow its way out of debt."

Globally, sovereign debt jumped by 17.4 per cent in 2020 to about $81 trillion, with the US, Japan and China taking on the largest new debts. In total, governments added more than $12 trillion to their balance sheets in 2020.

But debt levels as a proportion of the world economy had likely peaked.

Mr Sivapalan said broader trust in financial systems and institutions needed to be maintained in Australia to ensure financial stability, but this could be challenged by the normalisation of bond yields in the coming years.

Bond yields would nevertheless remain low for the foreseeable future.

Australian Associated Press