The bill, in its current form, would cost $400 billion over 10 years, the budget office said.
Today the budget office added $100 million to that figure.
The budget office puts the cost at $400 billion over 10 years.
The budget office has not taken a position on the bond act.
In a report to Congress, the budget office said the recession was likely to end within six months.
The Democratic plan would increase consumer insurance costs by 4 percent, the budget office said.
But the budget office last week set a higher figure, $7,068, taking into account housing costs around the country.
Almost all that saving, the budget office said, would come after the turn of the century.
But the budget office is still working on the calculations.
"If a budget office does its job well, most of these proposals never come to light."