What Are Business Days? Is Saturday a Business Day?

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A business day is any day on which businesses normally operate. In the United States that means Monday through Friday, excluding public holidays. Saturday and Sunday are not business days, and Friday is. When a bank, retailer, broker or contract says something will happen “within X business days,” it is counting only those working weekdays and skipping weekends and holidays.

The term also has a time-of-day sense. A business day is traditionally the 9 a.m. to 5 p.m. window when offices are open, which is why “end of business day” usually means about 5 p.m. local time. Industry and location change both the days and the hours.

How to Count Business Days

Treat the day the clock starts, such as an order, deposit or request, as day zero. Then count forward, skipping Saturdays, Sundays and any holiday the relevant institution observes. If the event happens after the business’s cut-off time, it is generally treated as occurring on the next business day. In that case day zero moves forward too.

Five business days equal one calendar week (seven days) when no holiday falls inside the window. Each holiday adds a calendar day.

Worked examples (hypothetical)

• One business day from Friday afternoon. “One business day” means the next working day, not necessarily tomorrow. A request made Friday is due Monday. If that Monday is a holiday, it is due Tuesday.
• Five business days from Thursday. Count Friday (1), Monday (2), Tuesday (3), Wednesday (4) and Thursday (5). The deadline is the following Thursday, seven calendar days later.
• “3 to 5 business days” from a Wednesday. Three business days lands on Monday and five lands on Wednesday. The window covers five to seven calendar days, or longer if a holiday intervenes.
• Two business days from the Friday before a Monday holiday. Monday is skipped, so Tuesday is day 1 and Wednesday is day 2. A “two-day” wait becomes five calendar days.

Is Saturday a Business Day? What About Sunday?

For U.S. banking, lending and most contracts, neither Saturday nor Sunday is a business day. Federal rules on funds availability (Regulation CC) define a business day as Monday through Friday, excluding federal legal holidays. A Saturday deposit is therefore treated as received on Monday, or on Tuesday after a Monday holiday. The same regulation uses a narrower term, a banking day, for a business day on which a particular bank is open for substantially all of its banking functions.

Some branches keep Saturday hours and some customer service lines answer on weekends. That convenience does not turn Saturday into a business day for processing, settlement or legal deadlines. A contract or terms of service can define business days differently, and the written definition is the one that applies.

Where Business Days Matter

Check deposits and holds. Depending on the amount and type of check, funds can take two or more business days to become fully available. Weekends and holidays extend that wait in calendar terms.

Bank transfers and payments. Many interbank transfers move only on business days. App-based services, including digital wallets, can show a payment instantly while the underlying bank movement still follows the business-day calendar.

Securities settlement. Trades settle on a business-day schedule written as T+n, where T is the trade date. U.S. stocks moved to T+1 in May 2024, so a trade executed Monday settles Tuesday. Other instruments and markets use different cycles.

Trading calendars. Market business days are the days exchanges are open, about 252 a year in the U.S. That number is the standard annualization factor in volatility and return calculations.

Deliveries and legal deadlines. Shipping guarantees, refund windows, notice periods and loan or mortgage disclosures are often stated in business days. A “four business day” delivery sent on Thursday can take six or seven calendar days to arrive.

International Business Days

A Monday-to-Friday week is common but not universal. In many Muslim-majority countries Friday is the main day of rest, and the workweek runs Sunday through Thursday. Six-day workweeks, Monday through Saturday, are common in parts of India, Mexico and Colombia. Public holiday calendars also differ by country.

For cross-border payments, both ends must be open. A transfer between a country that works Sunday to Thursday and one that works Monday to Friday has only four overlapping weekdays. A holiday on either side can add a day. Time zones matter as well, because one party’s end of business may fall before the other’s morning starts.

Limitations and Common Confusions

Business days vs. calendar days. Calendar days count every day, including weekends. A 10-calendar-day deadline and a 10-business-day deadline can differ by four or more days.

Business day vs. 24 hours. A Friday 4 p.m. request and a Monday 4 p.m. request are both due the next working day, three days apart in elapsed time.

Whose calendar applies. Bank holidays, exchange holidays and a company’s own closures do not always line up. Some markets close on days when banks are open, and the reverse also happens. The institution doing the processing sets the calendar.

Technology. Online services and fintech apps run around the clock, but for legal and financial purposes business days keep the traditional definition unless the terms say otherwise.

FAQs

The Bottom Line

Anyone waiting on a check hold, bank transfer, trade settlement, refund or legal deadline should count only working weekdays and skip the holidays the processing institution observes. Weekend branch hours and round-the-clock apps do not change that count. When a contract or terms of service defines business days, that written definition controls, and cross-border payments move only on days both countries are open.