Hungary's government plans to apply a tax on unhealthy food to more products, including coffee, daily Népszabadság said on Friday.
The government also wants to raise the tax for products on which it is already levied, the paper said.
Food industry insiders said they had not been consulted on any changes to the tax.
The "chips tax" on food high in sugar, salt, carbohydrates and caffeine came into force on September 1.
The government targeted revenue of HUF 5bn from the tax in 2012, but there could be a shortfall as retailers seem to have stocked up on the products affected by the tax before it was introduced, the paper said.
Next year, the tax is expected to generate revenue of HUF 30bn.