PO Box rental basics

What a PO Box is, and why people get one

A PO Box is a locked mailbox inside a post office lobby that you rent rather than own. Instead of mail arriving at your home or apartment, it arrives at that box, and you pick it up whenever you like — most lobbies with PO Boxes are accessible outside regular counter hours, sometimes 24/7.

People rent one for a few recurring reasons:

• Privacy. Your home address never appears on anything you order, sign up for, or list publicly. This matters for people who sell online, freelance, or just don't want a home address tied to public records.
• Stability while moving. If you move often — between apartments, for work, between semesters — a PO Box gives you one address that doesn't change even when your street address does. You update it once instead of updating it with every sender each time you move.
• A business address separate from home. Sole proprietors and small businesses use a PO Box so invoices, business mail, and a public-facing address don't point straight at a home address.
• Reliability. Mail sitting in an unsecured mailbox at a house or apartment building can be stolen or damaged by weather. A PO Box is locked and indoors.

Cost and how to rent one

Pricing is not one flat number nationwide — it depends on two things: the size of the box (small boxes for letters and thin flats cost less than larger boxes that fit small parcels) and the location of the post office (boxes at a small-town branch typically cost less than the same size box at a busy city branch). USPS bills for 3, 6, or 12-month terms, and rates are set per post office, so the only reliable way to know what a specific box costs is to look up that ZIP code directly at usps.com.

To actually get a box:

1. Go to usps.com and search for available PO Boxes by ZIP code, or walk into the post office you want and ask at the counter — both work.
2. Fill out PS Form 1583, the PO Box application, online or on paper. It asks for your name, current address, and the names of anyone else who'll receive mail at the box.
3. Bring two forms of ID: one with a photo (driver's license, state ID, passport, or military ID) and one that confirms your current address (a lease, utility bill, or vehicle registration). If you applied online, you still bring these to the post office to activate the box.
4. Pay for your term. You'll get a key or a combination, and the box is yours to use immediately.

What can — and can't — go to a PO Box

Nearly everything USPS carries reaches a PO Box the same way it reaches a house: First-Class letters, Certified Mail, Priority Mail, magazines, catalogs, and most flats slide directly into the box. The practical limit is size, not mail class — if an item is too big to physically fit through the box door, the clerk holds it at the counter and leaves a pickup slip in your box instead. You bring ID and the slip to collect it, which is a minor extra trip compared to a street address where a carrier can leave a large package on the porch.

One thing to know if you're considering a PO Box as your only address: some private carriers (UPS, FedEx) don't deliver to PO Box numbers on their own — packages coming through those carriers usually need an actual street address, or USPS's Package Intercept-style workaround. Anything mailed through USPS itself, including everything paperplane sends, has no such restriction.

Sending mail to someone's PO Box

If you're on the sending side rather than the renting side — say, someone gave you their PO Box as the address to write to — there's nothing special to do. Enter the PO Box number where you'd normally put a street address ("PO Box 1234"), and USPS routes it exactly like it would a home address. paperplane doesn't treat PO Box addresses any differently: paste your text or upload a PDF, put in the PO Box as the recipient, and choose the class of service you want — First-Class at $1.99 all-in for ordinary mail, Certified at $12.99 for proof of mailing and tracking, Certified with electronic Return Receipt at $14.99 when you need proof the recipient signed for it, or Priority at $24.99 when it needs to move fast. All four arrive at a PO Box with no extra steps on your end.