The costliest holiday shipping mistakes (and how to avoid them)

Whether you're mailing a few gifts to family or fulfilling hundreds of holiday orders, shipping this season costs more than it did last year. USPS, FedEx, and UPS raised prices, and several of those increases are stacking on top of each other. That makes small, everyday mistakes more expensive than usual.

Most of these mistakes are easy to miss and easy to fix. Here are six common mistakes that drive up shipping costs, and what to do instead.

1. Shipping to the wrong address

A missing apartment number or a mistyped ZIP code can turn one package into three separate costs. If the carrier catches the error, it may correct the address, then charge you an extra fee on top of what you already paid to ship it. In 2026, UPS charges $25.25 and FedEx charges $25.50 per address correction. It’s a flat fee, so it costs the same whether the package weighs one pound or 50. That's more than the cost of shipping many small packages in the first place.

If nobody catches the error, the package goes to the wrong place or comes back to you. Either way, you’ll have to pay to ship it again, and if it's lost for good, you're replacing the item too. For a holiday gift, that can also mean it arrives after the holiday.

The fix takes a few seconds. Many online shipping tools check addresses automatically before you buy a label.

2. Paying full retail price at the counter

Walking into a post office or carrier store and paying the price on the screen is what many people think is their only option. It's also often more expensive than buying a shipping label online, and this year the gap matters more than usual.

Shipping prices didn't go up just once in 2026. USPS, FedEx, and UPS raised rates, and several of those increases now apply at the same time. The U.S. Postal Service, for example, added a 6% average increase for peak-season on its main package services from October 4 through January 17. That’s on top of an 8% temporary increase that has been in effect since April of this year. Compared with last October, the same package may cost much more to ship than any single announcement suggests.

Alternative shipping options can offer volume discounts from carriers and pass them along, which can mean up to 90% off retail shipping rates for the same service from the same carrier. Some carriers even allow you to print your shipping label at home and drop the package off at your convenience, or schedule a pickup, without waiting in line.

3. Paying for speed you don't need

It's a familiar holiday move: you pay extra for a faster service just to be sure a package arrives before the 25th. Sometimes that's the right call. Other times, a cheaper ground service would have delivered it by the same date.

Published delivery ranges are often unreliable. One major carrier, for instance, lists expected delivery in 2 to 5 business days for its ground service and notes that delivery time is not guaranteed. Where your package actually lands in that range depends on the route, the carrier, and the time of year, and there's no way to know that from the range alone.

Some online shipping options let customers compare rates from multiple carriers side by side, and some have technology that will show a delivery estimate accurate to the day, instead of a generic range like “2 to 5 business days.” That date comes from how similar packages on the same route have actually moved recently. Customers can see which option is cheapest, which is fastest, and which gets your package there in time for the lowest price, all on one screen.

Paying for speed by default adds up. In July 2026, 85% of merchants that print more than 100 labels a month with Shippo had at least one order that could have cost less to ship and still been estimated to arrive just as soon or sooner. When a cheaper option existed, it was 22% cheaper on average, or $5.26 less per label. In 44% of those cases, the cheaper option was also scheduled to arrive sooner than the one the merchant bought.

4. Guessing your package's size or weight

When you buy a label, the price is based on the weight and dimensions you enter. Carriers measure packages again as they move through their networks, and if their numbers don't match yours, they bill you the difference. Those adjustments could show up days or weeks later, after you've already forgotten which package it was.

Small misses count. Some carrier pricing rules require package dimensions to be rounded up to the next whole inch, so a box that is 11.5 inches long is billed as 12. Just like estimating weight instead of using a scale, reusing the measurements from a different box can trigger the same kind of after-the-fact charge.

A tape measure and a basic shipping scale pay for themselves quickly. Measure the outside of the box after it's packed and sealed, since inside measurements leave out the cardboard and come up short. Round each side up to the next whole inch, and weigh the box with everything inside. Entering accurate numbers at the start means the price you see is the price you pay.

5. Using a box that's too big

Shipping a box of matches in a box big enough for a pair of boots is an easy way to overpay. Carriers charge for the space a package takes up, not just what it weighs, using a formula called dimensional weight. They multiply the length, width, and height, divide by a set number called a divisor, and bill you for whichever is higher: the dimensional weight or the actual weight.

That formula got more expensive this year. In July, the U.S. Postal Service lowered its divisor from 166 to 139 and started rounding every measurement up to the next whole inch, which made affected packages about 19% heavier on paper. The box didn't change and the product didn't change, but the billable weight did. Big, light items like clothing and home goods feel it the most.

Bulky packages are also getting hit earlier in the season. In late September, and started adding holiday fees to packages that need extra handling or exceed their size limits, about four weeks before the holiday fees on regular home deliveries kicked in. If you’re shipping something like a bike, a rug, or an artificial Christmas tree, those costs are already adding up.

The fix is to use the smallest box that protects what's inside. Keep a few box sizes on hand so you aren't defaulting to the biggest one, and use padded mailers for soft items that don't need a box at all.

6. Shipping without protection

The holidays are peak season for packages that get lost, damaged, or taken off porches. When it happens to an uninsured package, the sender usually covers the full cost of replacing the item and shipping it again.

Many shipping services include a small amount of built-in coverage, but it often falls short of what a gift or a customer order is worth. Before you ship anything valuable, check what's already included and add shipping insurance to cover the rest. It typically costs a few dollars per package, which is far less than replacing a lost order in December.

For porch theft in particular, a few good habits help. Use the tracking number that comes with your label and share it with the recipient, so they know to grab the package soon after it's delivered. For high-value items, consider requiring a signature or shipping to a pickup location instead of a doorstep.

A little preparation can save money

None of these fixes take long: confirm the address, compare rates before you pay, pick the service that arrives in time instead of the fastest one, measure carefully, right-size your box, and protect what matters. Together, they can help keep holiday shipping costs under control, even as carrier prices rise.