Tariffs are raising $27bn a month

America collected $27 billion in tariff receipts in June alone, according to official customs revenue figures. That is a record, and it turns the administration's trade taxes into a source of revenue worth several hundred billion dollars a year.

How the money came in

Customs duties used to be a rounding error in the federal accounts. That changed in stages this year: extra duties on Chinese goods from February, 25 per cent on imported cars and on steel and aluminium in the spring, then a 10 per cent baseline on almost everything from April. Steel and aluminium were raised again to 50 per cent in June. Because duties are paid when goods are entered and settled with a short lag, each new layer showed up in the monthly Treasury statement within weeks.

Simple multiplication shows the scale. At $27 billion a month the annual take would come to about $324 billion, which is the "several hundred billion" the administration now likes to cite. That figure assumes import volumes hold up, which is exactly what a tariff is designed to prevent.

A rate not seen in a century

Divide the $27 billion by the month's merchandise imports and the effective tariff rate comes out in double digits, a level the country has not seen in nearly a century. What started as targeted protectionist posturing has become a stream of income the government now relies on. It helps pay for general spending and eases the Treasury's short-term borrowing needs.

The comparison with the past is instructive. Before the income tax arrived with the Sixteenth Amendment in 1913, tariffs were the main source of federal revenue. The Smoot-Hawley Act of 1930 pushed rates higher still, and the collapse in world trade that followed made it a byword for self-harm. For most of the post-war era, successive rounds of the GATT and then the WTO drove American rates down to low single digits. The June figure reverses that trend in a matter of months.

Measuring the realised rate

The realised rate is lower than the headline schedules suggest, for measurable reasons. Smartphones and computers were exempted from the reciprocal tariffs in April, Mexican and Canadian goods that comply with the USMCA trade pact enter largely free of the new levies, and importers have shifted orders towards countries with lower rates. Dividing receipts by imports captures all of that, which is why it is the better guide to what the tariffs actually cost. It also means the rate can drift down without any change in policy, simply because buyers change where they shop.

Fiscal dependence sets in

The timing matters. On 4 July the president signed a large tax-and-spending bill that the Congressional Budget Office expects to add trillions of dollars to deficits over the next decade. Tariff receipts are the obvious offset, and administration officials have cited them as one. A government that budgets on the assumption of $27 billion a month has a strong incentive to keep the duties in place, whatever their trade rationale. Taxes that were sold as temporary leverage are turning into permanent revenue.

The same bill raised the debt ceiling by $5 trillion, which allows the Treasury to rebuild its cash balance with heavy sales of bills over the summer. Every dollar of duty collected is a dollar of bills it does not have to sell. The effect is small against total issuance, but it helps explain why the Treasury is in no hurry to see the tariffs negotiated away.

Who actually pays

The money does not appear from nowhere, and foreign exporters are not the ones handing it over. Any analyst who follows the flows can see where it comes from. It is taken straight out of the cash of American importers, logistics firms and consumers, none of whom can hedge against it.

The mechanism is simple. An importer pays Customs and Border Protection on entry, before the goods are sold, so the duty is a cash outlay that must be financed from working capital or a credit line. The importer then tries to recover it from its customers by raising prices, and from its foreign supplier by pressing for a discount. Studies of the 2018 and 2019 tariffs on China found that nearly all of the cost fell on American buyers rather than on Chinese exporters. The early evidence this year points the same way.

The tax is regressive because poorer households spend a larger share of their incomes on goods, and on the cheaper imported goods in particular. A family that buys clothes, shoes and small appliances pays a larger share of its income in duties than one whose spending goes on services, travel and financial assets.

The legal risk to the revenue

Much of the new revenue rests on the International Emergency Economic Powers Act, which the administration has used to impose the baseline and country-specific rates. In May the Court of International Trade ruled those tariffs unlawful. An appeals court stayed that decision and will hear arguments at the end of July. If the ruling were upheld, a large share of the monthly take would disappear and importers could seek refunds, although the car, steel and aluminium duties rest on separate authority and would stand.

The case for the tariffs is that they raise money efficiently, since collection costs are low and the base is easy to see, and that some of the burden will shift to foreign suppliers as contracts are renegotiated. Both points have some force. They do not alter who hands over the cash at the border, and shifting the burden abroad takes years of lost market share, not months.

At $27 billion a month the duties are cheap and easy to collect, but they amount to a regressive tax that will keep draining importers' working capital and households' spending power for as long as the rates stay where they are. Unless the courts strike down the emergency tariffs, expect monthly receipts to stay in this range through the rest of the year, and expect Congress to start counting them as permanent revenue long before it admits that Americans are the ones paying.