You cannot use a PO box as the registered address for your LLC. Every state requires a physical street address on your formation paperwork, and filings that list only a PO box get rejected. You can use a PO box as a separate mailing address for day-to-day business correspondence, and if the real goal is keeping your home address off public records, three other options do that job properly.
Why the Registered Address Has to Be a Street Address
The requirement comes down to one practical problem: someone has to be able to hand-deliver legal papers to your business. If your LLC gets sued or receives a government notice, a process server physically walks to the address on file and hands the documents to a real person. A PO box is a locked compartment in a post office lobby. No one can serve a lawsuit on it.
State business codes, most of which follow the Revised Uniform Limited Liability Company Act, require two things on your formation paperwork: a registered office address and a registered agent, both with street addresses, both located in the state where you formed the LLC. The registered office is the official location where legal papers can be delivered. The registered agent is the person at that address during business hours, authorized to accept those papers for your company.
If your LLC stops maintaining a valid physical address, the state may not be able to reach you with compliance notices. You could lose good standing or face administrative dissolution without realizing it. Reinstatement typically costs $100 to $250 in fees, and during the gap you may lose the liability protection that made forming an LLC worthwhile.
Where a PO Box Does Work
Your LLC effectively has two types of addresses. The registered office address goes on your formation documents and is used by the state and the courts. A PO box can never go here. The mailing address is where everyday business mail arrives: bank statements, vendor invoices, customer letters. Most states allow a PO box or private mailbox for this, and state filing forms usually include a separate field for it.
Using a PO box this way is a sensible organizational move. It keeps business correspondence separate from personal mail, gives you a consistent address if your workspace changes, and reduces junk mail at home. The street address handles the legal side; the PO box handles the commercial side. Mixing them up on the formation form is one of the most common reasons filings get rejected.
The IRS follows the same split. When you apply for an Employer Identification Number using Form SS-4, line 4a accepts a PO box as your mailing address. Lines 5a and 5b ask for your physical street address and explicitly say “Don’t enter a P.O. box number here.”1Internal Revenue Service. Instructions for Form SS-4 (12/2025) If your physical location or mailing address later changes, you report it to the IRS on Form 8822-B, and changes to the responsible party listed on your EIN must be reported within 60 days.2Internal Revenue Service. About Form 8822-B, Change of Address or Responsible Party – Business
Alternatives If You’re Trying to Keep Your Home Address Private
Most people asking about PO boxes are really trying to solve a privacy problem. They don’t want their home address sitting on a public state business database. A PO box can’t do that for the registered address, but three alternatives can.
Commercial Mail Receiving Agency
A Commercial Mail Receiving Agency, or CMRA, is a private business that rents you a mailbox at a real street address. The USPS defines CMRAs as private entities offering mailbox rental services, and they follow specific postal addressing rules.3USPS. Commercial Mail Receiving Agency (CMRA) Your address looks like a regular suite number rather than a PO box. USPS rules require the delivery address line to use the CMRA’s street address, with the private mailbox number appearing as “PMB” or “#.”4Postal Explorer. 285 Private Mailbox Addresses
CMRAs accept packages from all carriers, and many offer mail forwarding or digital scanning. Prices typically run $15 to $50 per month. A CMRA works well as a mailing address, and in many states as a principal office address, but most states will not accept it as a registered agent address because it doesn’t guarantee a person is physically present to accept legal papers during business hours. Some banks and state databases also flag CMRA addresses and ask for extra verification.
Virtual Office
A virtual office gives you a professional business address at a real commercial building, often with reception staff on site during business hours. That staffing is the key difference from a CMRA: virtual office providers typically have personnel who can accept service of process on your behalf. Many also offer conference rooms, coworking desks, and a business phone number, which helps if you occasionally need a physical meeting space.
Virtual offices satisfy the street address requirement in most states because they represent an actual commercial location with human presence. They generally cost $50 to $300 per month depending on the city and services. If you go this route, confirm that the provider’s staff will accept legal documents during business hours. That’s the whole point of the physical address rule.
Registered Agent Service
A registered agent service is the most targeted solution. These companies exist specifically to serve as the designated person at a physical address who accepts legal and government documents for your LLC. Their address goes on your public formation documents instead of yours, and they forward what they receive, usually within a day.
Registered agent services typically cost $50 to $300 per year, making them the most affordable privacy option. Their offices are open during standard business hours and are set up specifically to meet the requirements states impose on registered agents. For a solo owner working from home or traveling often, this is usually the simplest way to keep a home address off public records while staying compliant.
Using Your Home Address
A home address is legal to use as both the registered office and principal office in most states. It’s free and simple, and for many solo owners it’s the obvious choice. The trade-offs are worth thinking through.
Privacy is the biggest one. Your registered address becomes part of the public record in your state’s business database. Anyone searching your LLC’s name can see where you live. Marketing companies and data scrapers routinely pull addresses from these databases, which means your home could end up on mailing lists and business directories. For some businesses the risk goes beyond junk mail. If you deal with the public in any adversarial capacity, your home address is one search away from a disgruntled customer.
There are practical restrictions to check too. If you rent, your lease may prohibit operating a business from the unit. Homeowner association rules, usually in the covenants, conditions, and restrictions, often limit or ban commercial activity. Your municipality may have zoning ordinances that restrict business operations in residential areas. None of these will prevent you from listing the address on state paperwork, but violating them can create separate problems with your landlord, HOA, or local government.
Opening a Business Bank Account
Banks have their own address verification rules, separate from what your state requires. Under the USA PATRIOT Act, every bank must run a Customer Identification Program when you open an account, which includes verifying a physical address for the business.5Financial Crimes Enforcement Network. Ten of the Most Common Questions About the Final CIP Rule A PO box alone won’t satisfy this. The bank needs a location where the business or its owner can actually be found.
In practice, most banks accept a home address, a CMRA address, or a virtual office address as long as you can also provide a government-issued ID and your LLC’s formation documents. Policies vary. Some banks flag CMRA addresses and ask for additional documentation. If you use a registered agent’s address on your formation paperwork rather than your own, bring your registered agent agreement and a utility bill or lease showing your actual business location.
Keeping Your Address Current
Filing isn’t a one-time event when it comes to addresses. Most states require an annual or biennial report confirming that your registered office, registered agent, and principal office addresses are still accurate. Several states will administratively dissolve your LLC if you miss the filing. A handful, including Ohio, Missouri, and New Mexico, don’t require annual reports, but they still expect you to keep your address current through amendment filings.
When you move, update your address in two places. At the state level, file an address amendment or statement of change with the secretary of state. Amendment fees typically run $25 to $150. At the federal level, file Form 8822-B with the IRS.2Internal Revenue Service. About Form 8822-B, Change of Address or Responsible Party – Business Letting either one lapse means important legal or tax documents go to an address where nobody picks them up, and that’s how a small oversight turns into penalties or lost liability protection.