The Cost of Renting a PO Box

The cost of a USPS PO box in your area depends on a number of factors, including your location, the size of the box, and the rental period.

In some areas, a small box can be as little as $14 for a three month period. In other areas, the same box can be twice that amount.

As the boxes get larger, the cost gets higher. The largest box size (which is pretty big) is nearly 10 times the price of the smallest box.

You’ll save about 15% if you go for a 6-month rental instead of a 3-month rental, but you won’t save any money if you purchase a 12-month rental–it’s exactly double the cost of the 6-month rate.

How to Find Your Rate

The easiest way to determine PO box rates in your area is to use the Rate Finder on the USPS website. Simply enter your ZIP code in the left box and click Search. You’ll be shown a list of post offices in your area along with the various rates.

Many post offices do not offer the largest size box (size 5), so if you need this size you may need to hunt around a bit.

Box Sizes

US post office boxes come in five sizes.

PO box sizes for USPS

Size 1: Extra Small
Dimensions: 3 x 5.5 x 14.75
Capacity: 10-15 standard envelopes or2 magazines

Size 2: Small
Dimensions: 5 x 5.5 x 14.75
Capacity: 10-15 letters or 5 magazines

Size 3: Medium
Dimensions: 11 x 5.5 x 14.75
Capacity: Many large envelopes and magazines

Size 4: Large
Dimensions: 11 x 11 x 14.75
Capacity: Large enough for 2 shoeboxes with additional room 10-15 letters.

Size 5: X-Large
Dimensions: 22.5 x 12 x 14.75
Capacity: Incoming shipments? Our largest option is big enough for Flat Rate Boxes and Parcels.

Deposits & Fees

You are required to pay a $3.00 for each key. After 2 keys, the cost is $6.00/key.

The fee for having the lock replaced (lost key) or for a late payment is $15.00.

Reserving a PO Box

You can reserve your PO box online by going to the official USPS Post Office Box page or by visiting your local post office. If you like, you can print out the application form at home and complete before you go to the post office. Note that if you choose to sign up online you will need to create a account.

Regardless of which method you choose, you’ll need to provide two forms of valid ID.

According to the USPS website, accepted forms of identification include:

Photo IDs:

  • Valid driver’s license or state non-driver’s identification card
  • Armed forces, government, university, or recognized corporate identification card
  • Passport, passport card, alien registration card, or certificate of naturalization

Non-Photo IDs:

  • Current lease, mortgage, or deed of trust
  • Voter or vehicle registration card
  • Home or vehicle insurance policy

Alternatives Mailbox Services

There are a number of other services which offer mailbox services, such as UPS or MailBoxes Etc.

Prices for these services vary from location to location. These services are generally a little more expensive than United States Post Office mailboxes.