(WFXR) — The Commonwealth has collected millions of dollars in revenue since sports betting became legal last year, but numbers show that only five out of the 12 companies have paid any taxes.

That’s because of a tax break that helps reduce the companies’ obligation.

The most recent review of Virginia Lottery numbers found that sports betting companies have offered more than $168.8 million in “bonuses and promotions” to customers, which can then be deducted from each company’s tax obligations.

Virginia has taken in around $26.7 million in tax revenue so far, but promotional write-offs negated nearly half of the revenue the government could tax.