10 Business Days From Today

The two federal ten-business-day clocks

Regulation E is the one most people meet. Under 12 CFR 1005.11(c)(1), a financial institution "shall investigate promptly and ... shall determine whether an error occurred within 10 business days of receiving a notice of error". If it cannot finish in time, paragraph (c)(2) lets it take up to 45 days, but only if it provisionally credits the account within those same ten business days. The consumer's money moves on the business-day clock even when the investigation moves on the calendar-day one.

The Privacy Act runs the second. Under 5 U.S.C. 552a(d)(2)(A), an agency must, "not later than 10 days (excluding Saturdays, Sundays, and legal public holidays) after the date of receipt of such request, acknowledge in writing such receipt". The statute spells out the exclusion rather than using the phrase "business days", which is worth noticing when you are reading an older provision: the exclusion language is what makes it a business-day period.

Ten business days, worked out

Two work weeks of counting, from the reference date below. The calendar span is where the holidays show up.

Where ten business days turns up in ordinary work

Beyond the two federal rules above, ten business days is the default in a lot of commercial paperwork. These are conventions rather than legal requirements, so read the contract.

• Bank dispute and chargeback investigations, which follow the Regulation E clock even where the transaction is not covered by it.
• Two-week notice periods in vendor and staffing agreements, where "two weeks" is written as ten business days to avoid an argument about holidays.
• Standard document turnaround in due diligence, where ten business days is long enough to survive one public holiday without renegotiation.
• Invoice approval windows that sit upstream of a Net 30 term. If yours does, our Net 30 calculator handles the payment leg.

Public holidays inside this ten-day window

No US federal holiday falls inside this window from the reference date, so every skipped day is a Saturday or a Sunday. Switch the country in the calculator above to count against a calendar that does have one.

Ten business days across seven other calendars

Each row is the same count against that country's own calendar. All seven count Monday to Friday, so what separates the rows is which of the seven calendars closes for a day inside those ten working days. The more days a country closes, the further out its date is pushed.

Sources for this page

Every source below was fetched and read on September 7, 2026. Where a period on this page is a market convention rather than a rule, the copy says so.