Labor's treasury spokesman Chris Bowen says a Labor government would return the budget to balance in the same year as the Coalition, but concedes the deficit would be worse off over the next four years.

Campaigning on Wednesday will be dominated by economic management, with Labor releasing a 10-year economic plan and Prime Minister Malcolm Turnbull attacking Bill Shorten as the "most left-wing, anti-business" Labor leader in a generation.

Revealing the opposition's budget timeline, Mr Bowen told ABC Radio: "Based on the government's figures, we would get back to budget balance in the same year as the government, 2020-2021.