UPS, USPS and FedEx all deliver — but they’re not interchangeable, and picking the right one for each shipment can save you money and headaches. This guide compares the three U.S. carriers on price, speed, size limits, reliability and residential delivery, then lays out when each one wins.
This is an independent shipping guide. Compare live rates on the carriers’ own sites — we are not affiliated with UPS, USPS or FedEx.
UPS vs USPS vs FedEx at a glance
| UPS | USPS | FedEx | |
|---|---|---|---|
| Best for | 5+ lb, commercial, business, heavy | Small/light, PO boxes, rural | Time-sensitive express |
| Max weight | 150 lbs | ~70 lbs | 150 lbs |
| Cheapest when | ~5–20 lb & heavier | Under ~5 lbs | Heavier / express |
| On-time (Q4 2025) | ~97.6% | ~94.2% | ~96.1% |
| Residential fee | Surcharge | Included free | Surcharge |
| Delivers to PO boxes | No (Access Point) | Yes | No |
Cost: it depends on weight
There’s no single “cheapest carrier” — it shifts with package weight. USPS is typically cheapest for small, light parcels (roughly under 5 lbs). As packages get heavier, UPS becomes competitive in the 5–20 lb range, and both UPS and FedEx tend to beat USPS once you’re over about 20 lbs. UPS Ground and FedEx Ground are usually close on price — see our tips to reduce UPS shipping costs.
Speed and reliability
For everyday ground, UPS Ground often posts faster transit than FedEx Ground on comparable lanes, and UPS led on-time performance in late 2025 (~97.6%), with FedEx close behind and USPS a bit lower. When a shipment absolutely has to arrive by a set day, FedEx and UPS both offer strong express options.
Size, residential delivery and PO boxes
- Heavy/large items: UPS and FedEx handle up to 150 lbs; USPS tops out around 70 lbs.
- Residential deliveries: UPS and FedEx add a residential surcharge; USPS includes residential delivery at no extra charge.
- PO boxes & rural addresses: only USPS delivers directly to PO boxes, and it often reaches remote areas without the extra fees UPS and FedEx may add.
When to choose each carrier
- Choose USPS for very light packages, anything to a PO box, and rural or remote destinations.
- Choose UPS for packages from about 5 lbs up, commercial deliveries, heavy or palletized freight, and dependable ground service for businesses.
- Choose FedEx when speed is the priority and an express premium is worth it.
Many shippers use a mix — USPS for the small stuff, UPS for everything heavier and for business reliability. The best move is to compare the live rate for your exact package each time.
Frequently asked questions
Is UPS or USPS cheaper?
USPS is usually cheaper for small, light packages (under about 5 lbs), while UPS tends to win for heavier packages (roughly 5 lbs and up) and commercial deliveries.
Which carrier is most reliable?
UPS posted the best on-time delivery rate in late 2025 (about 97.6%), with FedEx close behind and USPS a little lower.
Can UPS deliver to a PO box?
Not directly — only USPS delivers to PO boxes. UPS can deliver to a UPS Access Point as an alternative pickup location.
What’s the heaviest each carrier ships?
UPS and FedEx accept packages up to 150 lbs; USPS tops out around 70 lbs for its main services. Heavier loads go as freight.
Related: UPS Ground Shipping · Reduce UPS Shipping Costs · UPS Tracking.
