As Washington lawmakers gear up to reform the tax code for the first time in 30 years, the future of the interest deduction on homeowner mortgages is up in the air.

According to the Dallas Morning News, the deduction isn’t likely to disappear, but it could be capped or lessened to some degree to streamline the tax code.

Under the current tax code, individual filers who itemize their returns can deduct interest on mortgages up to $1 million. But rather than itemize returns, a large portion of homeowners opt for a standard deduction instead. 

Though wealthy taxpayers tend to use the deduction most, the National Association of Realtors estimates that more than 75 percent of homeowners have taken the deduction at some point.

Per the Urban-Brookings Tax Policy Center, the average tax break on mortgage interest is $1,950, which equates to real savings for homeowners.

Rumored tweaks to the tax code include possibly capping the maximum eligible mortgage at $500,000 and lowering the deduction rate. While wealthy homeowners would absorb the brunt of the cuts, Urban-Brookings estimates the change would reduce the average taxpayer benefit by $130 a year. 

Uncertainty about how the deduction will fare in a reformed tax code has become a political football. But some top lawmakers are trying to reassure homeowners.

“We will continue to reward homeownership,” Texas Rep. Kevin Brady, the House’s top tax writer, said recently. “And we are exploring ways where we can reward and encourage more ownership.”