A Tax Day cash drain is coming for US funding markets

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The U.S. Treasury building in Washington, D.C.
Samuel Corum/Bloomberg

Wall Street strategists expect a robust increase in the Treasury's coffers this week as Americans pay their taxes, potentially putting pressure on relatively calm U.S. funding markets and spurring institutions to bolster their cash holdings. 

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While the short-term markets that underpin the nation's financial system have been quiet this year amid the Treasury's seasonal reduction in bill issuance and official maneuvers to boost liquidity, the status quo stands to be jolted by individuals and companies pulling cash from banks and money markets in order to meet tax obligations. That in turn, may spur banks to tap liquidity facilities to ensure they have enough cash on hand. 

Strategists estimate that tax payments due April 15 will bolster the Treasury's cash balance to more than $1 trillion this month, the most since October. That would mark a sharp inflow from $703 billion on April 10, the latest government data show.

All that cash must come from somewhere, and the removal of liquidity often drives up funding costs. The rate on overnight general collateral repurchase agreements on Wednesday traded from around 3.76% to around 3.78%, up from less than 3.7% for much of the year, according to Wrightson ICAP. In addition, counterparties tapped the Federal Reserve's Standing Repo Program for $10.46 billion, the most since Feb. 17, data show. 

"Precaution is the name of the game today," said Gennadiy Goldberg, head of US interest rate strategy at TD Securities. 

Still, alongside less bill supply, liquidity has also gotten support from the Federal Reserve's reserve‑management purchases going into this period. The Fed in December began buying about $40 billion of Treasury bills monthly, with Chair Jerome Powell saying at the time the Fed was "front-loading" its purchases to ensure there were enough reserves through the April tax season. Since then, bank reserves have grown to $3.18 trillion, the largest since Aug. 27, according to the latest Fed data.

The Fed this week announced it will now buy about $25 billion of bills each month, marking a faster wind-down than anticipated and signaling reserves are at a level where funding markets can withstand extreme moves.

"We think that the April tax season can be managed," said John Velis, foreign‑exchange and macro strategist at BNY Melon. He pointed to New York Fed's Roberto Perli's observation that recent heavy usage of the Fed's standing repo facility reflects "a greater willingness of at least some counterparties to use the operations when economically sensible following the changes to standing repo operations implemented in December."

Here are some of the facilities and funding-market indicators to look at to understand how cash will shift around the financial system: 

Treasury cash balance

The U.S. government's ability to pay its debts and meet its spending obligations ultimately comes down to whether it has enough cash. That figure fluctuates daily depending on spending, tax receipts, debt repayments and the proceeds of new borrowing, and large swings can ripple through short‑term funding markets.

Around the 2025 tax deadline, Treasury cash balance inflows were around $395 billion — a $324 billion net increase after T‑bill maturities and other payments. Wells Fargo strategists including Angelo Manolatos expect a similar dynamic this year, projecting an increase in the Treasury General Account of more than $300 billion by the end of the week, with the largest one‑day move occurring on April 15.

That increase is likely to push repo rates higher. Wells Fargo anticipates overnight rates trading above interest on reserve balances now at 3.65%. Still, it remains uncertain how much pressure will linger beyond the tax deadline, with another $140 billion in T‑bill paydowns expected through the end of April, they said 

Bank reserves

Bank reserves totaled $3.18 trillion in the week through April 8, up from $3.06 trillion the prior week, Fed data show. That's above where they stood before a rebuild of the Treasury's cash pile when— and an empty reverse repo facility accelerated the liquidity drain earlier this year — a squeeze that ultimately forced the Fed to halt its balance‑sheet unwind and add reserves back into the system.

The Fed abruptly stopped shrinking its balance sheet — a process known as quantitative tightening — at the end of 2025 and pivoted to adding reserves by buying short‑term Treasuries due in less than a year. Now, with the slowing amount of Treasury bills it buys each month, JPMorgan Chase & Co. strategists led by Teresa Ho estimate bank reserves could drop by $200 billion to $350 billion. 

Even so, some analysts argue the backdrop is less precarious than it was late last year. Wrightson ICAP senior economist Lou Crandall also noted that the difference between the volatility at the end of 2025 and potential gyrations around the tax date comes down to a change in the bill supply outlook, noting that there's a better balance between cash and collateral in the repo market that's unlikely to roil the front end even as reserves drop.

Money-market assets

While declines are expected in mid-April, they're likely to be led by institutional funds, as corporations also have tax payments due at that time. In 2025, money funds saw roughly $150 billion exit the space over two weeks, according to Investment Company Institute data. 

"Given near-record capital gains distributions in 2025, particularly in the US mutual fund industry, this year's tax-related outflows from MMFs and bank reserves could be in line with those we've seen over the past few years, though this is likely to be offset by lower expected tax liabilities" as a result of the Trump administration budget bill passed last year, JPMorgan's Ho wrote in a note. 

JPMorgan estimates money market fund assets under management declining by $125 billion to $175 billion over the days surrounding the tax date.


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