A daylight overdraft is a temporary negative balance in a bank’s Federal Reserve master account that arises during the business day when the bank sends payments before enough incoming funds arrive to cover them. The Federal Reserve treats this as intraday credit and charges an annualized rate of 50 basis points on the uncollateralized portion, sets a per-institution ceiling called a net debit cap, and expects the account to be back to zero by the time Fedwire closes. Pledge eligible collateral against the exposure and the fee on that portion drops to zero. Miss the end-of-day deadline and the pricing and supervisory consequences change sharply.
How the Negative Balance Arises
Payments move continuously through a bank’s Fed account. Debits go out over the Fedwire Funds Service or as originated ACH credits; deposits arrive from counterparties, customers, and settlement systems. Fedwire runs from 9:00 p.m. Eastern Time the prior calendar day through 7:00 p.m. Eastern Time, Monday through Friday excluding Federal Reserve holidays. Any moment during that window in which outgoing transfers push the master account below zero, the Federal Reserve is effectively lending the bank the difference.
The whole system rests on a simple assumption: money owed to the bank will arrive before the day ends. When it does, the overdraft disappears and the only cost is the intraday fee. When it doesn’t, the pricing turns punitive.
If the Account Doesn’t Clear by Close
An unresolved daylight overdraft converts into an overnight overdraft at the end of the business day. The rate jumps to the primary credit rate plus four percentage points, assessed for each calendar day the negative balance persists. The Reserve Bank also opens a counseling file on the institution. Repeat overnight overdrafts can escalate to real-time monitoring of the bank’s transactions or outright restrictions on its ability to send payments.
Net Debit Caps
A net debit cap is the maximum dollar amount of daylight overdrafts an institution may carry across its Federal Reserve accounts at any point in the day. The cap equals the bank’s capital measure multiplied by a “cap multiple” tied to its assigned category. Five categories exist:
- Exempt-from-filing, for financially healthy institutions that use only small amounts of intraday credit. The cap is the lesser of $10 million or 20 percent of capital measure, and the Reserve Bank assigns it automatically.
- De minimis, which allows peak daylight overdrafts up to 40 percent of capital measure without a full self-assessment.
- Average, Above Average, and High, each requiring a formal self-assessment covering creditworthiness, intraday funds management, customer credit controls, and operating procedures, plus a board-of-directors resolution. Each tier carries a progressively larger multiple, and the assessment must be redone at least every 12 months.
An end-of-minute negative balance that exceeds the cap is a cap breach and counts as a Payment System Risk policy violation. Narrow tolerance exists for exempt-from-filing institutions that breach no more than twice in two consecutive maintenance periods; otherwise, all breaches enter the enforcement pipeline. Reserve Banks review caps regularly and can cut a cap unilaterally if the institution’s condition deteriorates.
Going Above the Cap With Collateral
Institutions that need capacity beyond their net debit cap can apply for a maximum daylight overdraft capacity, or max cap. Any capacity above the net debit cap must be fully backed by collateral pledged to the Reserve Bank, and the board must pass a separate resolution specifying the dollar amount requested. Pledging less collateral than approved shrinks the effective max cap; pledging more does not push it above the approved figure.
How the Intraday Fee Is Calculated
The 50-basis-point annual rate is quoted on a 24-hour-day, 360-day-year basis. That produces an effective daily rate of roughly 0.00139 percent. The Fed’s monitoring system records the institution’s uncollateralized overdraft at the end of every minute of the 24-hour business day, sums those minute balances, divides by 1,440, and gets an average daily uncollateralized overdraft. That average, multiplied by the daily rate, is the day’s charge. Positive balances during the day are set to zero for this math and do not offset any overdrafts on the same day.
Daily charges accumulate over the 10-business-day reserve maintenance period. At the end of each period, eligible institutions receive a fee waiver of up to $150. Banks whose total charges fall under $150 pay nothing. Banks whose charges exceed it see the bill reduced by that amount.
Institutions That Can’t Overdraft At All
Some account holders have Fed accounts but no regular discount window access. Edge Act corporations, bankers’ banks that have not waived their reserve-requirement exemption, limited-purpose trust companies, and government-sponsored enterprises fall in this group. They receive no net debit cap and are not permitted to incur daylight overdrafts. If they do, the rate is 150 basis points (the standard 50 plus a 100-basis-point surcharge), with a minimum charge of $25 per maintenance period. Collateral pledged by these institutions does not offset fees or authorize future overdrafts.
Collateralizing to Eliminate the Fee
The most effective way to cut intraday credit costs is to pledge collateral against the exposure. Under the PSR policy’s dual-pricing framework, the collateralized portion of a daylight overdraft carries a zero fee. Only the uncollateralized slice draws the 50-basis-point charge. A bank that routinely runs large daylight overdrafts and fully collateralizes them can eliminate the fee entirely.
Eligible collateral includes U.S. Treasury securities, fully guaranteed agency debt, corporate bonds, and other assets the Reserve Bank accepts. The Fed assigns each pledged asset a collateral value by applying a margin, or haircut, to its fair market value. Margins reflect price volatility and vary by credit quality and duration.
Short-duration Treasuries retain nearly all their value for collateral purposes: Treasuries with zero to one year of duration are valued at 99 percent of market price, while Treasuries with more than 10 years of duration come in at 95 percent. Corporate bonds haircut more heavily as quality drops and duration extends. AAA-rated non-financial corporates at zero to one year are valued at 98 percent; BBB-rated non-financial corporates over 10 years fall to 90 percent. Securities with no available external price receive zero collateral value. Zero-coupon bonds outside the Treasury STRIPS category take an additional 1 to 3 percent reduction depending on duration. Institutions borrowing under the secondary credit program face steeper haircuts on most pledged assets other than Treasuries and agency securities.
The practical consequence: a portfolio of short-dated Treasuries produces nearly dollar-for-dollar daylight overdraft capacity, while a portfolio tilted toward longer-dated or lower-rated corporates gives up meaningful value in the haircut. That gap influences which securities banks pledge versus keep in a trading book.
What Happens After a Breach
Cap breaches and chronic overdrafts move through a structured enforcement ladder. Reserve Banks start with softer measures and escalate if behavior doesn’t change.
The first steps after a breach are usually a review of what caused it, a counseling letter, an examination of the institution’s account-management practices, and a written corrective plan from the bank. Most isolated breaches end here.
If problems continue, the Reserve Bank can move to firmer action. It can assign a zero cap, stripping the institution of all daylight overdraft capacity and putting real-time monitoring in place. It can reject or delay Fedwire and National Settlement Service transactions that would create or increase an overdraft. It can require additional collateral or minimum account balances. It can force prefunding of ACH credit originations. And it can notify the institution’s primary regulator, which tends to compound any existing supervisory concerns. In extreme cases the Reserve Bank can cut off Fedwire access entirely.
What FedNow Changed
The launch of the FedNow Service in 2023 introduced instant, around-the-clock payment settlement, which put pressure on a PSR framework built around a defined business day. The Federal Reserve amended the policy to align the business day for intraday credit purposes to a 24-hour period, and fees apply the same way whether or not the institution participates in FedNow.
One meaningful change involves weekends and holidays. Under the old rules, an overnight overdraft that started on a Friday automatically drew a multiday charge covering Saturday and Sunday. The updated policy dropped that automatic multiday charge. Institutions now incur an overnight overdraft penalty for each calendar day the negative balance is actually outstanding, and because FedNow operates on weekends, a bank can cure an overdraft on Saturday or Sunday rather than waiting until Monday.
FedNow also includes a liquidity management tool that lets participants transfer funds among themselves specifically to cover payment-related liquidity needs. The tool is available to institutions that are not full FedNow participants, extending access to real-time liquidity support outside traditional Fedwire hours.