The Association of Small Businesses in Slovakia (SAMP) proposes that the government cut both income and value-added tax from the current 19 percent to at least 15 percent.
The association was invited to make suggestions for the government's programme.
SAMP president Vladimír Sirotka said he is against any tax increases.
"The most important thing is to reduce the financial burden on small and medium-sized businesses, which means the preservation of the flat tax and not introducing new (higher) rates," Sirotka told news wire TASR.
In their recommendations, Sirotka called for both small and large enterprises to be put on the same legal footing.
"Small and medium-sized businesses should not be excluded from drawing EU funds," he said.
PM Robert Fico restated several times during his election campaign that his party would advocate higher taxes for banks and companies with a dominant position on the market.
