The phrase "additional tariff" is correct and usable in written English.
It can be used when referring to an extra charge or tax imposed on goods or services, typically in the context of trade or economics.
Example: "The government announced an additional tariff on imported steel to protect domestic manufacturers."
Alternatives: "extra duty" or "supplementary tax".
Mr. Gibbs said the United States, which already imposes a 4percenttariffff on Chinese tires, would impose an additional tariff of 35percentt for one year.
The new duties involved an additional tariff of 35 percent for one year, reduced to 30 percent in the second year and 25 percent in the third.
The tax Belarus was paying on oil imported from Russia was reduced from $180 to $53 per ton, though it was to pay an additional tariff on exports of products from Belarusian enterprises that were produced from imported Russian oil.
We suspect U.S. import tariffs and to a lesser degree Brexit concerns are playing a role in slowing manufacturing activity outside of the U.S. Inventory build ups ahead of additional tariff increases and Brexit have led to full warehouses.
Instead of remaining in Connecticut and putting much of their wealth into government coffers, many wealthy families are electing to move to one of the 36 states that does not have an estate tax – or to one of the 49 states that does not have a gift tax (that's right, only Connecticut levies this additional tariff).
It will also assess, in a ruling expected this spring, whether China's solar panels have been unfairly subsidized, which could result in an additional tariff of 100percentt.
In addition to imposing additional tariffs on steel and aluminum from China and other countries, President Trump has threatened to put protective duties on other Chinese-made products worth $60 billion.
On July 6, additional tariffs against Chinese products go into effect.
A finding of dumping would result in additional tariffs that could be far larger than these.
Two days of public hearings are scheduled July 19-20, and the president could go ahead with his additional tariffs shortly thereafter.
Mr. Trump has also threatened additional tariffs on $100 billion of Chinese products that, for now, will not go into effect.
