Iowa could build on economic momentum by adding to the tax reforms of 2018, and raising the sales tax while cutting others might be one of the answers, a report by the conservative free-market group Tax Education Foundation contends. The full report will be released Thursday. 

Part of the network created by the late David Stanley, TEF used the Economic Research Center’s scoring model to look at four scenarios: 

— A 1 percentage point increase in sales taxes combined with cuts in personal and corporate income tax yields to make the increase revenue-neutral. The group projects that would lead to $250 million of economic growth in the first year, a bump in business investment, more consumer activity and $40 million in added tax revenue because of the growth. 

— Further tax reforms, which would accelerate growth. Implementing just the already approved 2018 tax cuts, with a revenue-neutral 1-cent sales tax added, would mean more than $300 million in added economic activity, the group contended. 

— Tax reform with a top personal income tax rate of 5.5%, a top corporate income tax rate of 6%, and a revenue-neutral sales tax increase would generate over $800 million in added growth. An average family would save more than $1,100 in taxes, the group said. 

— Tax reform coupled with eliminating income tax credits and broadening the sales tax base would mean $410 million in added growth the first year, the report concluded. 

The report was authored by Rea S. Hederman Jr., executive director of the Economic Research Center and vice president of policy at the Buckeye Institute; Andrew J. Kidd, an economist with the Economic Research Center at the Buckeye Institute; and James B. Woodward, an economic research analyst with the Economic Research Center at the Buckeye Institute.