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  • Home / Blog / Shipping Cost

What is the Difference Between USPS Priority Mail and USPS Flat Rates?

04 Jan, 2023 | 4 Min Read
What is the Difference Between USPS Priority Mail and USPS Flat Rates?

Table of Contents

1) What is USPS Priority Mail and how does it work?

USPS priority mail is a shipping service offered by USPS that allows you to ship packages anywhere in the US. The cost of shipping is calculated based on the package weight and dimensions. The priority mail packages are usually delivered within 3 days, with no extra charge for deliveries on Saturday.

USPs Priority mail also offers free package pickup, USPS tracking, and includes upto 50 dollars of insurance with most packages. Additionally, no surcharges are levied for fuel, resident delivery, or rural delivery.  If you are looking for flat rate delivery, you can look at USPS Priority Mail Flat Rate packaging.

2) How is USPS Flat Rate different from Priority Mail, and what are the benefits of using it?

The main difference between USPS Priority Mail and USPS Flat Rate is the shipping rate calculation method. While the shipping rate for USPS Priority Mail is calculated using the package weight and dimension and the shipping destination, USPS Flat Rate offers fixed-cost shipping across the US. 

The shipping cost for USPS Flat Rate is calculated only using the size of the packaging. If your product fits into a specific package size and weighs upto 70 pounds, you can ship it anywhere in the US at the same fixed rate.

The primary benefit of using the USPS Flat Rate is the fixed cost of shipping. It allows you to quickly calculate domestic shipping costs for a range of products without worrying about the exact product weight, dimension, and destination. You can also use the  Priority Mail Flat Rate Envelopes or Boxes to simplify the packaging and rate calculation process further.

3) How much will you save by using a Flat Rate envelope or box instead of Priority Mail service?

The amount you will save using Flat Rate envelope or box instead of Priority Mail service depends on the type of products you are shipping and the volumes you are expecting. In general, you don't have to worry about the maximum weight limit of 70 pounds as most products will be well below that weight.

If you are primarily shipping products locally across short distances, opting for Priority Mail services rather than Fixed Rate might make sense. If your shipments generally cover a long distance or you are shipping all across the US, Flat Rate envelops and boxes will often work out to be cheaper.

Another factor you need to consider is the ease of packaging with Flat Rate envelopes or boxes. This takes out the hassle of sourcing your packages by yourself and keeping track of weights and dimensions to calculate the shipping rates. This might significantly bring down your human resource costs.

4) What are some of the most common items that can be sent through USPS Flat Rate?

USPS Flat Rate can be used to ship a variety of items. The most common items shipped through USPS flat rate are ecommerce products. If you are shipping only one kind of item, USPS Flat Rate can be an excellent choice due to the fixed cost of shipping. Do note that you cannot ship firearm ammunition, explosives, airbags, gasoline, and alcohol through USPS Flat Rate. You also cannot ship especially heavy items (over 70 pounds)

5) Which service is more cost-effective for my business needs - Priority Mail or Flat Rates shipping services?

You need to calculate the exact shipping costs based on volumetric weight and distance to get the shipping rates for USPS Priority Mail. For USPS Flat Rate, you only need to check which package size your order will fit in, and verify that the weight is below 70 pounds. You need to compare the rates for both services to find out the most cost-effective option for your business. 

6) How can I track my shipment's progress once it has been sent through USPS Priority Mail or Flat Rates services?

Once your order has been sent through USPS Priority Mail or Flat Rates services, you can use the tracking number from the shipping receipt to track your order on the USPS website.

7) Tips for packaging your items securely, so they arrive at their destination safely

Some tips for packaging your order so that it arrives safely at the destination:

7.1) If using USPS Flat Rate shipping, you can opt for the Priority Mail Flat Rate Envelopes or Boxes to easily and securely package your order.

7.2) If you are shipping fragile products, it is a good idea to opt for a slightly larger box and to use adequate padding for the package. You can also mark your package as fragile for better handling throughout the shipping process.

7.3) USPS Priority Mail provides insurance of 50 dollars for most packages. You should always check the insurance coverage in detail and opt for higher coverage if needed.

8) What should I do if I have any problems with my shipment after it has been sent through USPS Priority Mail or Flat Rates services?

If you have any problems with your shipment after it has been sent through USPS Priority Mail or Flat Rates services, you can contact USPS by phone at 1-800-275-8777 or contact your nearest USPS post office. You can also email them using your tracking number on the USPS website.

9) Conclusion

The shipping cost calculation method is the primary difference between USPS Priority Mial and USPS Flat Rate. While USPS Priority Mail considers the dimensional weight and shipping distance, USPS Flat Rate only takes the package size into consideration. If you are using USPS Flat Rate, you can also opt for their presized shipping boxes and envelopes to further simplify the process. Do note that USPS Flat Rate ships only within the US and the package weight should be within 70 pounds.

The service most suitable for your shipping needs depends on your exact requirements. If you are shipping a large volume of orders across the US, USPS Flat Rate can be a convenient option for you. The fixed shipping cost can significantly simplify your shipping cost calculation process. This can be especially helpful if you are an ecommerce business owner, and are charging the shipping costs to the customer. On the other hand, USPS priority mail might work out to be cheaper if you are shipping packages across short distances and you do not mind calculating shipping costs for each package.

10) FAQs USPS Priority Mail vs. USPS Flat Rates

10.1) What is the main difference between USPS Priority Mail and USPS Flat Rate?

The main difference between USPS Priority Mail and USPS Flat Rate is the way the shipping cost is calculated. USPS Priority mail uses the dimensional weight and shipping distance to calculate the shipping cost. On the other hand, USPS Flat Rate uses only the package size to calculate the shipping cost.

10.2) Can I ship internationally using USPS Flat Rate?

No, you cannot ship internationally using USPS Flat Rate. USPS Flat Rate can only be used to ship domestically within the US.

10.3) What are some other things to keep in mind when shipping using USPS Flat Rate?

Some other things to keep in mind while shipping using USPS Flat Rate is that they have a maximum weight limit of 70 pounds. Also, your item should fit well within the bounds of the box provided without any parts sticking out.

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