The NBA makes an average of $1.2 million in gate revenue per regular season game and $2 million for each playoff game, according to a source.

With 259 of 1,230 regular season games remaining, that means roughly $300 million of ticket revenue lost if fans couldn’t purchase tickets or were refunded for tickets already purchased.

Over the past decade, on average, there have been 83 playoff games in each postseason, which would lead to another loss of about $166 million. 

In total, that's nearly $500 million in lost ticket revenue.

According to sources around the NBA, crowds had been dwindling due to the coronavirus with some teams seeing 60 percent of the normal capacity on Wednesday.