50% steel and aluminum tariffs take effect today. Here's what could get more expensive as a result.

The Trump administration raised tariffs on aluminum and steel to 50% today, a move experts say could increase costs on everything from homes and cars to household and office supplies.

While the U.S. has carved out its own niche in domestic metals manufacturing, it also relies on imports from abroad to fill in the gaps: America imported 26.2 million metric tons of steel and 5.4 million metric tons of aluminum from abroad last year, according to the International Trade Administration. Canada serves as the biggest foreign source for both metals.

The White House has been aggressively trying to pare back on America's reliance on foreign nations, imposing 25% tariffs on steel and aluminum in February, citing national security concerns. President Trump, during a visit to a U.S. Steel mill in Pittsburgh on May 30, announced he was doubling down on that rate, raising the 25% levies to 50%. The higher tariffs went into effect Wednesday at 12:01 a.m. EST.