"End of day" on a tracking page is not a time. It means the carrier committed to a delivery day, not an hour, and the package can show up any time the driver is still on route. For UPS that usually means between 9 a.m. and 7 p.m. at a home. For FedEx Home Delivery it usually means by 8 p.m. USPS publishes ranges of days, not hours, and only Priority Mail Express commits to a clock time.
Whether the carrier stands behind that window with a refund is a separate question, and the table further down answers it service by service. The carrier windows, transit ranges, and guarantee terms below come from UPS, FedEx, and USPS service and policy pages, checked September 16, 2026. Carrier terms change, so treat the date as part of the fact.
What "end of day" means, carrier by carrier
UPS
UPS's Understanding Tracking Status page, checked September 16, 2026, says: "Unless the sender has elected for a time-definite air delivery service, packages are typically delivered between 9 a.m. and 7 p.m. (occasionally later) to residences, and by close of business for a commercial address."
Two things follow from that sentence. A UPS Ground package showing "Out for Delivery" at 6:30 p.m. is still on schedule. And a package headed to a business is due by whenever that business closes, which is why commercial deliveries land earlier in the day. The only UPS packages with a clock-time commitment are the time-definite air services the shipper paid for. If the label says UPS Ground, "end of day" is all UPS has committed to. Our guide to tracking statuses covers what the other UPS and FedEx status lines mean.
FedEx
FedEx splits business and residential delivery into two services, and they run on different clocks. Ground serves business addresses Monday through Friday and lists its delivery time as "by end of day." Home Delivery serves residences every day of the week, and FedEx's own answer to "how late does FedEx Home Delivery deliver" is that packages are typically delivered by 8 p.m. The same page says there are no official delivery hours for Home Delivery, so 8 p.m. is the typical outer edge, not a cutoff the driver is held to.
Transit for both is 1 to 5 business days inside the contiguous US, and 3 to 7 business days to or from Alaska and Hawaii. The "1 to 7 business days" figure that circulates on delivery-time pages, including an earlier version of this one, is not what FedEx publishes. For more on Ground, see how long FedEx Ground takes.
USPS
USPS service pages give you a range of days, not a delivery hour. Priority Mail is listed at 2 to 3 days. Ground Advantage is 2 to 5 days. Neither page uses the phrase "business days," and neither commits to a time of day. The one USPS service with a clock on it is Priority Mail Express, due by 6 p.m. local time within 1 to 3 days.
If you have read that "Priority Mail is guaranteed in 1 to 3 days" on this page or any other, it is wrong. The Priority Mail page says in its own footnote that "the expected delivery date does not come with a money-back guarantee."
Commitment or estimate: what each service stands behind
Most delivery-time confusion comes from treating an estimate like a promise. Here is what each service commits to, taken from the carrier service pages and, for FedEx, from its money-back guarantee policy page.
Service | Published transit | Time-of-day commitment | Money-back guarantee |
|---|---|---|---|
USPS Priority Mail Express | 1 to 3 days | By 6 p.m. local time | Yes |
USPS Priority Mail | 2 to 3 days | None | No, per the Priority Mail page |
USPS Ground Advantage | 2 to 5 days | None | None listed on the service page |
FedEx First Overnight | Next business day | 8, 8:30, 9, or 9:30 a.m. to most areas | Yes, under the policy effective Feb. 12, 2026 |
FedEx Priority Overnight | Next business day | 10:30 a.m. to most businesses, noon to most residences | Yes, under the policy effective Feb. 12, 2026 |
FedEx Standard Overnight | Next business day | 5 p.m. to businesses, 8 p.m. to residences | Yes, under the policy effective Feb. 12, 2026 |
FedEx Ground | 1 to 5 business days | "By end of day" | Not on the current guarantee list |
FedEx Home Delivery | 1 to 5 business days | Typically by 8 p.m. | Not on the current guarantee list |
UPS Ground | 1 to 5 business days | None. Typically 9 a.m. to 7 p.m. at residences | Not verified for this article |
FedEx's guarantee is the one to watch. Its money-back guarantee page, under the policy effective February 12, 2026, lists four US domestic services: First Overnight, Priority Overnight, Standard Overnight, and 2Day A.M., plus their contract Extra Hours variants. The same page says "the money-back guarantee for all other FedEx services will remain suspended until further notice." That page also records a suspension for packages shipped on or after December 1, 2025, so the status moved more than once in three months. If a refund matters to you, read the policy page on the day you ship rather than trusting a service page, this one included. Priority Overnight and Standard Overnight each have their own breakdown here.
Can you pick a delivery window?
With UPS and FedEx, yes, and it costs money unless you are on a paid tier. With USPS, no.
UPS My Choice has a free tier and a Premium tier at $19.99 a year. On the free tier, changing the delivery date is $9.99 per package and requesting delivery inside a 2-hour window is $14.99 per package. Premium makes date changes free and includes two confirmed 2-hour window requests a year before fees apply. Delivery notifications, estimated delivery times, driver instructions, and delivery to a neighbor are free on both tiers. The old line that "UPS does not offer scheduled delivery times" is out of date.
FedEx Delivery Manager is free to join. Evening delivery between 5 p.m. and 8 p.m. on the scheduled day is $5.55 per package. A 2-hour window on a day up to 7 calendar days after the original delivery date is $11.50 per package. Vacation holds of up to 14 days are free. FedEx says these fees vary by location and are confirmed when you make the request.
USPS does not sell a delivery window on its Priority Mail, Ground Advantage, or Priority Mail Express service pages. The closest option is Priority Mail Express Sunday and holiday delivery, which USPS describes as "available in many major markets for an additional fee."
Weekend delivery, briefly
Weekend rules are where delivery-time pages go wrong most often, so here is the short version, with links to the fuller answers.
FedEx Home Delivery runs every day of the week and reaches over 98% of the US population on Saturdays and nearly two-thirds on Sundays. FedEx Ground delivers Monday through Friday, with Saturday available for a fee. The FedEx overnight page lists Monday through Friday delivery for its three overnight services, with Saturday delivery in certain areas for an additional charge.
USPS Priority Mail lists no surcharge for Saturday delivery. Sunday is the exception, not the rule: Priority Mail Express Sunday and holiday delivery is available in many major markets for an additional fee. Our article on USPS weekend delivery covers which services run on which day.
UPS weekend rules depend on the service and the address. Our UPS Sunday delivery guide has the detail.
If you are the one shipping
Everything above is written for the person reading a tracking page. If you are the brand that printed the label, the practical rule is short: promise your customer a delivery day, not a delivery hour, unless you paid for a service that commits to one. On UPS Ground, FedEx Ground, FedEx Home Delivery, USPS Priority Mail, and USPS Ground Advantage, the carrier commits to a day at most. A support reply that says "it will be there by 5 p.m." is a promise the carrier never made.
The part you control is the front half of the timeline, the gap between an order arriving and the package leaving the building. At Simpl, orders received before 12pm CT ship the same day on UPS, USPS, or FedEx. That does not shorten the carrier's transit range, but it keeps warehouse lag from being added in front of it. If your delivery promises rest on guesswork about "end of day," a fixed ship cutoff through ecommerce fulfillment is the fix on your side of the handoff.