U.S. importers and their customers are about to experience the full force of President Donald Trump’s unprecedented use of emergency economic powers.

To that point, 25% tariffs on imports from America’s top two trading partners, Canada and Mexico, went into effect at midnight Tuesday, as did an additional 10% tariff on Chinese imports. Canadian energy will be tariffed at a lower rate of 10%, also as of midnight Tuesday.

It’s difficult to overstate how far-reaching the impact of these tariffs will be, or how quickly they will be felt.

U.S. trade with Mexico, Canada and China last year accounted for around 40% of America’s total commerce in goods around the world.

And unlike traditional trade policy, these tariffs are designed to deliver a financial sting right away, trade experts told CNBC.

“From a technical standpoint, the imposition of the tariffs is basically a light switch. They’re on or they’re off,” said Daniel Anthony, the president of Trade Partnership Worldwide, a policy research firm.

Literally overnight, the cost of importing, for example, $100,000 worth of limes from Mexico increased by $25,000 Tuesday. This is money that the importer will need to pay directly to U.S. Customs and Border Protection when the limes cross the border.

Target CEO Brian Cornell told investors Tuesday that shoppers could see produce prices rise within days, the result of tariffs on Mexican fruits and vegetables.

Even if a glitch prevented tariffs from being collected starting at exactly 12:01am Eastern Time Tuesday, they would still be tallied, and importers could expect to receive a tax bill retroactively, said Nicole Bivens Collinson, a Washington trade lobbyist and managing principal at Sandler, Travis & Rosenberg.

“It’s like when you get an Uber bill and you forgot to tip, and add it on later,” she said.

Along with the two new North American tariff rates, Trump also signed an order Monday doubling his earlier 10% tariff on imports from China, for a total 20% additional tariff rate on the nation.

Taken together, Canada, China and Mexico accounted for $2.2 trillion worth of U.S. overseas trade in 2024, according to federal census data. About $840 billion of that came from trade with Mexico, $762 billion from Canadian imports and exports and $582 billion from China.

So-called “de minimis” imports are international shipments valued at $800 or less. Historically, these low-value, person-to-person imports have been exempt from U.S. tariffs.

Several of the world’s biggest e-commerce companies take advantage of the de-minimis loophole by shipping their products directly to consumers from overseas.

Fast fashion sites, like Temu and Shein, ship goods directly from China to American consumers. They have helped fuel an explosion in U.S.-bound de-minimis shipments in recent years.

But collecting tariffs on de-minimis goods is harder than it looks.

“There’s a whole infrastructure system set up for normal shipments that come in to the country,” said Collinson, who previously served as a U.S. trade negotiator. But this system doesn’t exist for de-minimis imports, she added.

Last year alone, the U.S. accepted more than 1.3 billion overseas shipments that qualified for de-minimis tariff exemptions, according to federal data.

To process that many new shipments, the federal government will need to hire more customs agents, experts said.

Nonetheless, in early February Trump announced that the United States would begin collecting tariffs on low-value shipments from overseas.

Trump’s order gave the U.S. Postal Service mere days to implement a system to begin collecting tariffs on millions of small packages every day.

It also sowed chaos throughout the international postal system, culminating on Feb. 4 with an announcement that USPS had suspended all parcel delivery services from China and Hong Kong “until further notice.”

A day later, the postal service reversed course and resumed processing the de-minimis parcels. But it did not collect any tariffs on them.

Soon after, the Trump administration issued an amendment to the China order, formally delaying any effort to collect tariffs on de-minimis imports until “adequate systems are in place to fully and expediently process and collect tariff revenue” on them.

The U.S. Postal Service didn’t immediately respond to a request for comment.

A month later, the White House put similar de-minimis waivers in place Sunday for Canada and Mexico, ahead of imposing the new 25% tariffs.

It’s unclear when a de-minimis tariff collection system might be up and running.

A U.S. Customs and Border Protection spokeswoman told CNBC, “The dynamic nature of our mission, along with evolving threats and challenges, requires CBP to remain flexible and adapt quickly while ensuring seamless operations and mission resilience.”

But Anthony noted that the delay for China was “open ended.”

“Part of the challenge is [federal] personnel and bandwidth,” he said. Customs and Border Protection may not have the staff or resources available to handle the new volume of shipments and packages, he said.

Officials must also determine how the levy will be assessed and paid, and how customs officials will process tens of millions of new data points furnished by shippers for each individual package, the experts said.

“Anyone can develop a good policy, but whether that policy can actually be effectuated is critical,” Collinson said.

Recent actions by the Department of Government Efficiency to access internal computer systems and databases at many federal government agencies, including the Treasury Department, Internal Revenue Service, and Social Security Administration, have sparked debates about privacy and data security. 

“There’s always inherent risk in having sensitive information at a government agency because they’re ultimately responsible for protecting it and moderating who actually has access to it,” said Steve Grobman, chief technology officer at the cybersecurity firm McAfee.

DOGE is not a federal agency, and billionaire Elon Musk, whom President Donald Trump brought on board to implement the DOGE initiative, is not a federal official. Yet, since its establishment, DOGE has sought access to software and IT systems at federal government agencies to “maximize efficiency” and cut spending.

Critics say there has been a lack of transparency about exactly how personal or financial information is being used and whether it is being kept secure — although Musk has said DOGE’s actions are “maximally transparent.” Meanwhile, several lawsuits have been filed to block DOGE’s access to sensitive personal data.

Cybersecurity experts say that protecting your personal and financial information should be part of a strategy to take care of your overall financial well-being, regardless of the political climate.

“For people who are concerned about the security of their data collected and stored by the federal government, our advice is the same as any other time or circumstance,” James  L. Lee, president of the non-profit Identity Theft Resource Center, said in an emailed statement. 

“There are actions you can and should take to protect your personal information, no matter what organization is collecting and storing it — from the corner market to local doctors to government agencies at all levels. Personal information is always at risk of identity misuse,” Lee said.

Here are five actions cybersecurity experts recommend you take now:

Freezing your credit will block access to your credit report and prevent anyone from opening new accounts in your name. Then, if someone gets your Social Security number or other private information, they can’t take out a loan or open a credit card.

You must contact all of the three major credit reporting agencies — Equifax, Experian, and TransUnion — to freeze access to your credit with each. The process only takes a few minutes, and it’s free. Just make sure to temporarily unfreeze your credit before you apply for a new credit card, loan, or mortgage.

Take the time to review your credit reports from each of the credit reporting agencies to make sure there are no errors or signs of identity theft. You can get a free copy of your credit report from each of the bureaus weekly by going to annualcreditreport.com.

You may not need to check your reports every week, but it’s important to review your credit history at least quarterly to ensure there are no issues.

If you don’t have one already, create a “My Social Security” account on the Social Security Administration’s website to check your earnings records, get estimates of your monthly retirement benefits and manage current benefits. Review your statement, download a copy and contact the Social Security Administration if there are any mistakes. Establish your account now to ensure no one else does so in your name. 

“Keeping a local backup of your Social Security statement, credit history [and] student loan payments is always a good idea, and doubly so as the future is unclear at so many of the administering agencies,” Emory Roane, associate director of policy at the non-profit Privacy Rights Clearinghouse, said in an emailed statement.

The IRS allows consumers to proactively request an identity protection PIN (IP PIN) — a unique six-digit number — to use when filing your tax return. The IP PIN verifies your identity when you file an electronic or paper return. It prevents someone else from using your Social Security number to file a fake return, possibly stealing your refund. 

McAfee’s Grobman recommends that consumers make sure that “sensitive data that they have control of goes to the minimal number of places possible.” 

“Setting up multi-factor authentication, the various secure ID and PIN capabilities that the IRS offers, is absolutely critical to helping ensure that only you or your designated tax preparer is accessing that sensitive information on government systems,” he said.

Create a “passkey” for any online account that offers one for enhanced security. A passkey is a string of encrypted data that you can access with a face scan, fingerprint, or PIN. Use multi-factor authentication — like a password plus a code — if you can’t add a passkey. Don’t reuse passwords.

Instead, Lee, of the Identity Theft Resource Center, recommends you “use a password manager to create and remember a different password for every account. Google and Apple offer free password manager apps, and password managers are included in Safari, Chrome, Edge and other major web browsers.”

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The Social Security Administration plans to shed 7,000 employees as the Trump administration looks for ways to cut federal spending.

The agency on Friday confirmed the figure — which will bring its total staff down to 50,000 from 57,000.

Previous reports that the Social Security Administration planned for a 50% reduction to its headcount are “false,” the agency said.

Nevertheless, the aim of 7,000 job cuts has prompted concerns about the agency’s ability to continue to provide services, particularly benefit payments, to tens of millions of older Americans when its staff is already at a 50-year low.

“It’s going to extend the amount of time that it takes for them to have their claim processed,” said Greg Senden, a paralegal analyst who has worked at the Social Security Administration for 27 years.

“It’s going to extend the amount of time that they have to wait to get benefits,” said Senden, who also helps the American Federation of Government Employees oversee Social Security employees in six central states.

Officials at the White House and the Social Security Administration were not available for comment at press time.

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The Social Security Administration on Friday said it anticipates “much of” the staff reductions needed to reach its target will come from resignations, retirement and offers for Voluntary Separation Incentive Payments, or VSIP. 

More reductions could come from “reduction-in-force actions that could include abolishment of organizations and positions” or reassignments to other positions, the agency said. Federal agencies must submit their reduction-in-force plans by March 13 to the Office of Personnel Management for approval.

Former Social Security Administration Commissioner Martin O’Malley last week told CNBC.com that the continuity of benefit payments could be at risk for the first time in the program’s history.

“Ultimately, you’re going to see the system collapse and an interruption of benefits,” O’Malley said. “I believe you will see that within the next 30 to 90 days.”

Other experts say the changes could affect benefits, though it remains to be seen exactly how.

“It’s unclear to me whether the staff cuts are more likely to result in an interruption of benefits, or an increase in improper payments,” said Charles Blahous, senior research strategist at the Mercatus Center at George Mason University and a former public trustee for Social Security and Medicare.

Improper payments happen when the agency either overpays or underpays benefits due to inaccurate information.

With fewer staff, the Social Security Administration will have to choose between making sure all claims are processed, which may lead to more improper payments, or avoiding those errors, which could lead to processing delays, Blahous said.

Disability benefits, which require more agency staff attention both to process initial claims and to continue to verify beneficiaries are eligible, may be more susceptible to errors compared to retirement benefits, he added.

The Social Security Administration’s funding for administrative costs comes out of its trust funds, which are also used to pay benefits. Based on current projections, the trust funds will be depleted in the next decade and Social Security will not be able to pay full benefits at that time, unless Congress acts sooner.

The efforts to cut costs at the Social Security Administration would likely only help the trust fund solvency “in some miniscule way,” said Andrew Biggs, senior fellow at the American Enterprise Institute and former principal deputy commissioner of the Social Security Administration.

What President Donald Trump is likely looking to do broadly is reset the baseline on government spending and employment, he said.

“I’m not disagreeing with the idea that the agency could be more efficient,” Biggs said. “I just wonder whether you can come up with that by cutting the positions first and figuring out how to have the efficiencies later.”