10% baseline tariff
In a background call before Trump's speech, a senior White House official told reporters that the president would impose a "baseline" tariff on all imports to the US.
That rate is set at 10% and will go into effect on 5 April.
It is the companies that bring the foreign goods into the US that have to pay the tax to the government, although this could have knock-on effects to consumers.
Some countries will only face the base rate. These include:
United Kingdom
Singapore
Brazil
Australia
New Zealand
Turkey
Colombia
Argentina
El Salvador
United Arab Emirates
Saudi Arabia